ANNEX32 WI-FI Basic
User Manual
Version beta 1.41 beta
5
© ciccioCB
2020
COPYRIGHT
The Annex firmware, including the AnnexToolKit
and this manual, are Copyright 2017-2020 by Francesco Ceccarella
(ciccioCB).
The compiled object code (the .bin file) for
the Annex firmware is free software: you can use or redistribute it
as you please except for commercial purposes. It is not allowed to distribute or embed it into
products that are sold or for any other activity making or intended
to make a profit.
The compiled object code (the .exe file) for
the AnnexToolKit utility is free software: you can use or
redistribute it as you please except for commercial purposes.
It is not allowed to distribute or
embed it into products that are sold or for any other activity
making or intended to make a profit.
This program is distributed in the hope that
it will be useful, but WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.
This manual is distributed under a Creative
Commons Attribution-NonCommercial-ShareAlike 3.0 France license
(CC BY-NC-SA 3.0)
The above copyright notice and this permission
notice shall be included in all copies or redistributions of the
Software in any form.
License and
credits
The base of the interpreter
comes from the original project "MiniBasic" by Malcom
Mclean.
Adafruit BNO055 Orientation
Sensor library is written by KTOWN is Copyright © Adafruit
Industries. It is released under MIT license.
TFT_eSPI display Library is
Copyright © 2017 Bodmer. It is released under FreeBSD
license.
Adafruit PWM Servo Driver
Library is Copyright © Adafruit. It is released under MIT
license.
Arduino Library for Dallas
Temperature ICs is Copyright © Miles Burton
<miles@mnetcs.com>. It is released under LGPL
license.
OneWire Library is Copyright
1999-2006 Dallas Semiconductor Corporation and Copyright © 2007,
Jim Studt.
Adafruit DHT Humidity &
Temperature Sensor Library is Copyright © Adafruit. It is released
under MIT license.
ESP8266 and ESP32 Oled Driver
for SSD1306 display is Copyright © 2016 by Daniel Eichhorn and
Copyright © 2016 by Fabrice Weinberg
NeoPixelBus library is
Copyright © Michael C. Miller. It is released under LGPL
license.
ESP AsyncTCP library is
Copyright © 2016 Hristo Gochkov. It is released under LGPL
license.
ESP AsyncWebServer library is
Copyright © 2016 Hristo Gochkov. It is released under LGPL
license.
IRremote library is Copyright ©
Sebastien Warin, Mark Szabo, Ken Shirriff, David Conran. It is
released under LGPL license.
uRTCLib is is Copyright © 2015
Naguissa (naguissa.com@gmail.com). It is released under LGPL
license.
BME280 library is written by
Limor Fried/Ladyada for Adafruit Industries. It is released under
BSD license,
APDS9960 library is written by
Shawn Hymel for Sparkfun Electronics. It is released under Beerware
license.
PID Library is written by Brett
Beauregard (br3ttb@gmail.com). It is released under MIT
license.
MQTT library pubsubclient is
Copyright (c) 2008-2015 Nicholas O'Leary. It is released under MIT
license
The Javascript Editor
EditArea is Copyright © 2008 Christophe Dolivet. It is
released under LGPL license.
The M5Stack library is
copyright © 2017 by M5Stack. It is released under MIT
license.
The MPU9250 driver is part of
the M5Stack Library.
The VL53L0X driver is Copyright
© 2017 Pololu. It contains code © 2016
STMicroelectronics.
Some GUI objects come from the
library GUIslice Copyright © Calvin Hass that is released under MIT
license.
Contributions
A very big thank you to Robin Baker
(Electroguard) for his great involvement in the project by
supporting all the tests on the real hardware (bought with his
money), and all the advices that allowed me to add a lot of
functionality, not to mention the Huge work he did while
documenting the project on the website.
Content :
Introduction:
17
Interpreter:
19
Branch
labels
20
Variables:
20
Arrays:
22
Scope of the
variables:
23
Bases of the
language
23
OPERATORS AND
PRECEDENCE
24
Basic internal
keywords:
26
IF command
:
26
FOR loop
27
WHILE WEND
loop
28
DO LOOP
loop
28
SELECT
CASE
29
GOTO
30
GOSUB
30
DATA
31
END
32
EXIT
32
SUB
32
Logical / boolean
Operations
34
ERRORS
HANDLING
35
ONERROR
ABORT
35
ONERROR
IGNORE
35
ONERROR SKIP
[nn]
35
ONERROR
CLEAR
35
ONERROR GOTO [label |
OFF]
35
BAS.ERRLINE
36
BAS.ERRNUM
36
BAS.ERRMSG$
36
HOW the interpreter works with
the HTML code and Objects :
36
HTML
Objects
41
TIMERS
46
EVENTS
46
Button
Event
47
OnHtmlChange
Event
47
OnHtmlReloadEvent
47
OnInfrared
Event
48
OnSerial
Event
48
OnSerial2
Event
48
OnTouch
Event
49
OnUDP
Event
49
OnWgetAsync
Event
49
OnUrlMessage
Event
50
OnEspNowMsg
Event
53
OnEspNowError
Event
54
OnMQTT
Event
54
OnPlay
Event
54
WiFI
CONNECTIONS
54
RECOVERY
MODE
56
DATE - TIME
timekeeper
56
Unix Time
functions
57
FAT32 File
System
57
Ret = FILE.COPY(filename$,
newfile$)
59
Ret =
FILE.DELETE(filename$)
59
Ret =
FILE.EXISTS(filename$)
59
Ret = FILE.RENAME(oldname$,
newname$)
59
Ret =
FILE.SIZE(filename$)
59
Ret =
FILE.MKDIR(dirname$)
59
Ret =
FILE.RMDIR(dirname$)
59
Ret$ =
FILE.DIR$(path$)
59
Ret$ = FILE.READ$(filename$,
[line_num] | [start, length])
59
FILE.APPEND filename$,
content$
59
FILE.SAVE filename$,
content$
59
FILE.WRITE filename$,
content$
60
FILE.SAVE_IOBUFF
60
FILE.WRITE_IOBUFF
60
FILE.APPEND_IOBUFF
60
FILE.READ_IOBUFF
60
I/O
BUFFERS
60
Read
Operations
62
Write
Operations
63
Special
operations
64
Advanced
operations
64
Bit
operations
65
Buffer
copy
65
Code examples
:
65
WIRING
68
DIGITAL
I/O
69
PIN
INTERRUPTS
70
Analog
inputs
70
TOUCH
inputs
71
Hardware
interfaces:
71
PWM
71
PWM.SETUP pin, channel,
default_value, [,frequency]
[,resolution]
72
PWM.OUT channel,
value
72
SERVO
73
I2S BUS
74
SPEAKER
OUTPUT
76
I2C BUS
76
PCF8574
Module
77
ADS1115
Module
79
MCP23017
Module
81
SPI BUS
82
74HC595
Module
84
MCP23S17
Module
86
COUNTERS
87
PID
controllers
88
SOUND
PLAYER
90
Metadata Decoding from Mp3 and
streaming
92
SPEECH SYNTHESIS with vintage
C64 SAM speaker
93
SPEECH SYNTHESIS using google
translate
94
LCD DISPLAY USING
I2C
94
OLED
DISPLAY
99
ST7920 LCD
DISPLAY
101
RTC
module
103
PCA9685 (PWM / Servo)
Module
104
TM1637 display
module
106
TM1638 display
module
107
MAX7219 8-Digits 7-segment
display
109
MAX7219 Dot Matrix
Display
110
NeoPixel WS2812B led
strips
112
NeoPixel based WS2812b Dot
Matrix DIsplay
114
SD CARD
ADAPTER
118
TFT DISPLAY
ILI9341
120
TFT DISPLAY
ILI9163
124
TFT DISPLAY
ILI9486
125
TFT DISPLAY
ST7735
127
TFT DISPLAY
ST7796
128
TouchScreen
129
TFT
FONTS
130
QR
CODES
134
GRAPHIC GUI for
TFT
134
GUI
Objects
135
gui.TextLine
135
gui.Button
136
gui.Image
136
gui.ButtonImage
137
gui.CheckBox
137
gui.Slider
138
gui.ProgressBar
138
gui.Ramp
139
gui.Gauge
139
gui.Box
139
gui.Circle
140
gui.Rect
140
gui.Line
141
GUI
Functions
141
gui.GetValue
141
gui.Target
141
GUI
Commands
141
gui.INIT
141
gui.REDRAW
142
gui.REFRESH
142
gui.AUTOREFRESH
142
gui.SETVALUE
142
gui.SETTEXT
142
gui.SETIMAGE
142
gui.SETCOLOR
142
gui.SETRANGE
143
gui.SETEVENT
143
gui.SETSTYLE
144
INFRARED
INTERFACE
144
ULTRASONIC DISTANCE SENSOR
HC-SR04
148
DHT xx Temperature / Humidity
Sensors
149
DS18B20 Temperature
Sensors
151
BNO055 Absolute Orientation
Sensor
152
BME280 Combined humidity and
pressure sensor
154
APDS9960 Digital Proximity,
Ambient Light, RGB and Gesture Sensor
156
RFID MFRC522 RFID cards
reader
159
Writing NUID for UID changeable
card (4 byte UID version)
163
VL53L0X TOF (Time Of Flight)
Distance Sensor
163
MPU9250
164
MPU6500 /
MPU6050
167
MPU6886 (For M5
Atom)
169
IMU FUSION
FUNCTIONS
171
ETHERNET Module
W5500
172
FTP
176
BAS.FTP$
176
Server data requests (GET
and POST)
177
WGET$(server$, port,
[,header])
178
WPOST$(server$, body$, port
[,header])
178
WGETASYNC[(]server$, port,
[,header][)]
178
MQTT
179
Ret = MQTT.Setup(server$
[,port])
179
Ret = MQTT.Connect(login$, pass$
[id$])
179
Ret = MQTT.Connect("", "",
[id$])
179
Ret =
MQTT.Disconnect()
179
Ret = MQTT.Publish(topic$,
message$)
179
Ret = MQTT.Subscribe(topic$
[,Qos])
179
Ret =
MQTT.UnSubscribe(topic$)
179
Ret =
MQTT.Connected()
179
ESP-NOW
180
ANNEXCAM
190
Camera Functions /
commands
192
Using AnnexCam in output
page
195
Control of the camera using
URL
196
Face
Recognition
197
Image / video reception from
Annex
198
CONVERSION
FUNCTIONS
200
CONVERT.DEGC_TO_F(degC)
201
CONVERT.F_TO_DEGC(degF)
201
CONVERT.TO_IEEE754(num)
201
CONVERT.FROM_IEEE754(iee754_bin)
201
CONVERT.MAP(number, fromLow,
fromHigh, toLow, toHigh)
201
BAS
CONSTANTS
201
BAS.VER
202
BAS.VER$
202
BAS.ERRLINE
202
BAS.ERRNUM
202
BAS.ERRMSG$
202
BAS.FILENAME$
202
BAS.RTCMEM$
202
BAS.SSID$
202
BAS.PASSWORD$
202
BAS.LOAD
204
BAS.RESETREASON
204
BAS.DEVICE
204
OPTION
COMMANDS
204
OPTION.CPUFREQ
80|160|240
205
OPTION.MAC
mac$
205
OPTION.LOWRAM
value
205
FUNCTIONS:
205
NUMERICAL
FUNCTIONS
205
ABS(number)
217
ACOS(number)
217
ADC(pin)
217
APDS9960.SETUP
(mode)
217
APDS9960.READGESTURE
217
APDS9960.AMBIENT
217
APDS9960.RED
217
APDS9960.GREEN
217
APDS9960.BLUE
217
APDS9960.PROXIMITY
217
APDS9960.GESTUREGAIN
(gain)
217
APDS9960.GESTURELED
(intensity)
217
ASC(string$)
217
ASIN(number)
217
ATAN(number)
217
ATAN2(x,
y)
217
BAS.VER
217
BAS.ERRLINE
208
BAS.ERRNUM
208
BME280.SETUP(address)
217
BME280.ALT(qnh)
217
BME280.HUM
217
BME280.QFE
217
BME280.QNH(altitude)
217
BME280.TEMP
217
BNO055.SETUP(
address)
217
BNO055.HEADING
217
BNO055.PITCH
217
BNO055.ROLL
217
BNO055.VECTOR ( param,
axis)
217
BNO055.CALIB
[(param)]
217
CINT(number)
217
CONVERT.DEGC_TO_F(degC)
210
CONVERT.F_TO_DEGC(degF)
210
CONVERT.TO_IEEE754(num)
210
CONVERT.FROM_IEEE754(ieee754_bin)
210
CONVERT.MAP(number, fromLow,
fromHigh, toLow, toHigh)
210
COS(number)
210
COUNTER.COUNT
(cnt)
217
COUNTER.PERIOD
(cnt)
217
DATEUNIX(date$)
217
DHT.TEMP
217
DHT.HUM
217
DHT.HEATINDEX
217
DISTANCE(pin_trig,
pin_echo)
217
EMAIL from$, to$, subject$,
message$
217
ESPNOW.ADD_PEER(MAC_add$)
211
ESPNOW.BEGIN
211
ESPNOW.DEL_PEER(MAC_add$)
211
ESPNOW.STOP
211
ESPNOW.WRITE(
msg$)
211
ESPNOW.WRITE(
msg$,MAC_add$)
212
EXP(number)
212
FIX(number)
217
FILE.DELETE(filename$)
217
FILE.EXISTS(filename$)
217
FILE.SIZE(filename$)
217
FLASHFREE
217
FUSION.ANGLE(axis)
217
INSTR([start], string$,
pattern$)
217
I2C.LEN
217
I2C.READ
217
I2C.READREGBYTE (i2c_address,
register)
217
I2C.END
217
INT(number)
217
LEN(string$)
217
LOG(number)
217
MILLIS
217
MQTT.Setup(server$
[,port])
213
MQTT.Connect(login$, pass$,
[id$])
214
MQTT.Connect("", "",
[id$])
214
MQTT.Disconnect()
214
MQTT.Publish(topic$,
message$)
214
MQTT.Subscribe(topic$
[,Qos])
214
MQTT.UnSubscribe(topic$)
214
MQTT.Connected()
214
NEO.GETPIXEL(pos)
214
NEO.RGB(R, G,
B)
217
PI
217
PID1.COMPUTE( current_value,
target_value)
214
PIN(pin_number)
214
PIN.TOUCH(pin_number)
214
PING(host$)
215
POW(x, y)
217
RAMFREE
217
RND(number)
217
SERIAL.LEN
217
SERIAL2.LEN
217
SGN(number)
217
SIN(number)
217
SPI.BYTE(byte)
217
SQR(number)
217
TAN(number)
217
TFT.RGB(r,g,b)
217
TIMEUNIX(time$)
217
TM1638.BUTTONS
217
TOUCH.X
217
TOUCH.Y
217
VAL(string$)
217
WIFI.CHANNEL
216
WIFI.MODE
216
WIFI.NETWORKS ( network$
)
216
WIFI.STATUS
217
WORD.COUNT( string$
[,delimiter$])
217
WORD.FIND( string$, find$
[,delimiter$])
217
STRING
FUNCTIONS
218
BAS.ERRMSG$
227
BAS.FILENAME$
227
BAS.FTP$( host$, login$,
password$, file$, folder$)
218
BAS.PASSWORD$
218
BAS.RTCMEM$
218
BAS.SSID$
218
BAS.VER$
218
BIN$(number)
227
BUTTON$(name$, label [, id]
)
227
CHECKBOX$( variable
[,id])
227
CHR$(number)
227
CSSID$(object_id,
object_style)
227
DATE$[(format)]
227
ESPNOW.ERROR$
219
ESPNOW.READ$
219
ESPNOW.REMOTE$
219
FILE.DIR$[(path$)]
219
FILE.READ$(filename$,[line_num]
| [start, length])
227
HEX$(number)
227
HtmlEventButton$
219
HtmlEventVar$
220
IMAGE$(path
[,id])
220
IMAGEBUTTON$(path, label
[,id])
227
IP$
227
IR.GET$[ (param)
]
227
JSON$(string$,
field$)
227
LCASE$(string$)
227
LED$(variable
[,id])
227
LEFT$(string$,
num)
227
LISTBOX$(variable$, "option1,
option2, option3, ..." [, height]
[,id])
227
MAC$[ (id)
]
221
METER$(variable, min, max
[,id])
227
MID$(string$, start
[,num])
227
MQTT.Message$
222
MQTT.Topic$
222
OCT$(number)
222
PASSWORD$(variable [, id]
)
227
REPLACE$(expression$, find$,
replacewith$)
227
RIGHT$(string$,
num)
227
RTC.DATE$[(format)]
227
RTC.TIME$
227
SERIAL.CHR$
227
SERIAL.INPUT$
227
SERIAL2.CHR$
227
SERIAL2.INPUT$
227
SLIDER$(variable, min, max
[,step] [,id])
227
SPACE$(number)
227
SPI.STRING$(data$,
len)
227
SPI.HEX$(datahex$,
len)
227
STR$ (number [,format$
[,toint]])
227
STRING$(num,
char$)
227
TEMPR$(pin_number
[,ID])
227
TEXTBOX$(variable [, id]
)
227
TRIM$(string$)
227
TIME$
227
UCASE$(string$)
227
UDP.READ$
227
UDP.REMOTE$
227
UNIXDATE$(value
[,format])
227
UNIXTIME$(value)
227
URLMSGGET$
([arg$])
227
WGET$( http_server$, port
[,header] )
227
WGETRESULT$
227
WORD$(string$, position
[,delimiter$])
227
WORD.DELETE$(string$, position
[delimiter$])
227
WORD.EXTRACT$(string$, lead$,
trail$)
227
WORD.GETPARAM$( setting$,
parameter$ [,separator$])
227
WPOST$(server$, body$, port
[,header])
228
COMMANDS:
228
AUTOREFRESH
interval
257
BAS.LOAD
filename$
231
BAS.RTCMEM$ =
val$
229
CLS
257
CSS
style_code$
257
COMMAND
cmd$
257
COUNTER.RESET
cnt
257
COUNTER.SETUP cnt, pin
[,mode]
257
CSSEXTERNAL
file$
229
DATA const1 [,const2]
...
231
DHT.SETUP pin,
model
257
EMAIL.SETUP server$, port,
user_name$, password$ [, debug]
231
EMAILASYNC from$, to$, subject$,
message$
257
FILE.SAVE filename$,
content$
257
FUSION.INIT
257
FUSION.MADGWICK ax, ay, az, gx,
gy, gz
257
FUSION.MADGWICK ax, ay, az, gx,
gy, gz, mx, my, mz
257
FUSION.MAHONY ax, ay, az, gx,
gy, gz, mx, my, mz
257
FUSION.BETA
=
257
FUSION.ZETA
=
257
FUSION.KI
=
257
FUSION.KP
=
257
HTML
code$
257
I2C.SETUP sda_pin, scl_pin
[,freq [,stretch]]
257
I2C.BEGIN
address
257
I2C.END
257
I2C.REQFROM address,
length
257
I2C.READREGARRAY i2c_address,
register, nb_of_bytes, Array()
257
I2C.WRITE
value
257
I2C.WRITEREGBYTE
i2c_address,register, value
257
I2C.WRITEREGARRAY i2c_address,
register, nb_of_bytes, Array()
257
INPUT.TIMEOUT
timeout
257
INPUT["prompt$";]
variable
257
INTERRUPT pin_no, {OFF |
label}
257
IR.INIT pin_rx | OFF [,
pin_tx]
257
IR.SEND type, code$,
bits
257
JSCALL
javaCode$
257
JSCRIPT
script$
257
JSEXTERNAL
file$
257
LCD.INIT address, cols,
rows
257
LCD.CLS
257
LCD.PRINT x, y,
text$
257
LOCAL var1 [,var2],
...
257
MAXDISPLAY.SETUP
CS_pin
257
MAXDISPLAY.PRINT msg$
[,‘brightness]
257
MAXSCROLL.SETUP nb_devices,
CS_pin
257
MAXSCROLL.PRINT
msg$
257
MAXSCROLL.NEXT
msg$
257
MAXSCROLL.TEXT
msg$
257
MAXSCROLL.SHOW pos [,
brightness]
257
MAXSCROLL.SCROLL
[brightness]
257
MAXSCROLL.OSCILLATE
[brightness]
257
NEO.PIXEL led_pos, R, G, B [,
disable]
257
NEO.PIXEL led_pos, COLOR [,
disable]
257
NEO.SETUP pin
[,nb_led]
257
NEO.STRIP led_start_pos,
led_end_pos, R, G, B [, disable]
257
NEO.STRIP led_start_pos,
led_end_pos, COLOR [, disable]
257
NEOSCROLL.SETUP nb_devices, pin
[,serpentine]
257
NEOSCROLL.PRINT
msg$
257
NEOSCROLL.NEXT
msg$
257
NEOSCROLL.COLORS
col$
257
NEOSCROLL. NEXTCOLORS
col$
257
NEOSCROLL.SHOW pos [,
brightness]
257
NEOSCROLL.TEXT
msg$
257
NEOSCROLL.SCROLL
[‘brightness]
257
NEOSCROLL.OSCILLATE
[‘brightness]
257
OLED.CLS
257
OLED.INIT
orientation
257
OLED.REFRESH
fmt
257
OLED.COLOR
color
257
OLED.PIXEL x,
y
257
OLED.LINE x1, y1, x2,
y2
257
OLED.RECT x,y, width, height
[,fill]
257
OLED.CIRCLE x, y, radius [,
fill]
257
OLED.FONT
font_num
257
OLED.PRINT x, y, text$
[background]
257
OLED.IMAGE x, y,
image$
257
ONERROR ABORT or ONERROR IGNORE
or ONERROR SKIP [nn] or ONERROR CLEAR or ONERROR GOTO
label
241
ONESPNOWERROR [label |
OFF]
243
ONESPNOWMSG [label |
OFF]
243
ONGESTURE [label |
OFF]
243
ONHTMLCHANGE [label |
OFF]
257
ONHTMLRELOAD [label |
OFF]
257
ONINFRARED
label
257
ONMQTT
label
243
ONSERIAL [label |
OFF]
243
ONSERIAL2 [label |
OFF]
257
ONTOUCH [label |
OFF]
257
ONUDP [label |
OFF]
257
ONURLMESSAGE [label |
OFF]
257
ONWGETASYNC [label |
OFF]
257
OPTION.CPUFREQ
80|160
257
OPTION.LOWRAM
value
257
PAUSE
delay
257
PCA9685.SETUP
addr
257
PCA9685.SETFREQ
freq
257
PCA9685.PWM pin,
value
257
PID1.INIT Kp, Ki,
Kd
244
PID1.LIMITS min,
max
244
PID1.PERIOD
msec
244
PID1.PARAMS Kp, Ki,
Kd
244
PID1.SETMODE
mode
244
PIN(pin_number) =
val
244
PIN.MODE pin_number, mode
[,PULLUP | PULLDOWN ]
257
PLAY.MP3
mp3$
257
PLAY.NETWORKS
stream$
257
PLAY.SETUP dest
[,buffer]
257
PLAY.SPEAK message$ [,
phonetic]
257
PLAY.STOP
257
PLAY.VOICE "message", "language"
[, "filename"] [, action]
245
PLAY.VOLUME
volume
245
PLAY.WAV
257
PRINT expression[[,;
]expression] ...
257
PRINT2 expression [[,;
]expression] ...
257
PWM.SETUP pin, chan,
default, [,freq] [,resol]
257
PWM.SETUP pin,
OFF
257
PWM.OUT chan,
value
257
READ var1 [,var2]
...
257
REBOOT
257
REFRESH
257
RESTORE
257
RTC.SETTIME Year, Month, Day,
Hours, Minutes, Seconds
257
SERIAL.BYTE ch1 [,ch2] . .
.
257
SERIAL2.BYTE ch1 [,ch2] . .
.
257
SERIAL.MODE
baudrate
257
SERIAL2.MODE baudrate, pin_tx,
pin rx
257
SERVO id,
value
257
SERVO.SETUP id, pin_number |
OFF
257
SETTIME Year, Month, Day, Hours,
Minutes, Seconds
257
SLEEP
value
257
SOCKET client,
msg$
257
SPI.SETUP speed [,data_mode [,
bit_order]]
257
ST7920.INIT
CS_pin
257
ST7920.CLS
257
ST7920.REFRESH
fmt
257
ST7920.COLOR
color
257
ST7920.PIXEL x,
y
257
ST7920.LINE x1, y1, x2,
y2
257
ST7920.RECT x,y, width, height
[,fill]
257
ST7920.CIRCLE x, y, radius [,
fill]
257
ST7920.FONT
font_num
257
ST7920.PRINT x, y, text$
[background]
257
ST7920.IMAGE x, y,
image$
257
TM1637.PRINT msg$ [, brightness
[, dotpoints]]
257
TM1637.SETUP data_pin, clock_pin
[, bit_delay]
257
TM1638.PRINT msg$ [, brightness
]]
257
TM1638.SETUP data_pin,
clock_pin, strobe_pin
257
TM1638.LEDS
val
257
TFT.BMP filename$, [x, y [,
back_color] ]
257
TFT.BRIGHTNESS
val
257
TFT.CIRCLE x, y, radius,color [,
fill]
257
TFT.FILL
color
257
TFT.IMAGE filename$, [x, y [,
back_color] ]
257
TFT.INIT
orientation
257
TFT.JPG filename$, [x, y [,
scale] ]
257
TFT.LINE x1, y1, x2, y2,
col
257
TFT.PRINT expression [[,;
]expression] ...
257
TFT.RECT x, y, width, height,
color [ [,fill] ,[round_radius] ]
257
TFT.TEXT.COLOR color
[,backcolor]
257
TFT.TEXT.POS x,
y
257
TFT.TEXT.SIZE
size
257
TIMER0 interval,
label
257
TIMER1 interval,
label
257
TOUCH.CALIB
257
UDP.BEGIN
port
257
UDP.REPLY msg$
[,port]
257
UDP.STOP
257
UDP.WRITE ip, port,
msg$
257
URLMSGRETURN msg$
[,content_type$]
257
WAIT
257
WGETASYNC http_server$, port
[,header]
255
WIFI.AWAKE
257
WIFI.CONNECT SSID,
password
257
WIFI.POWER
pow
257
WIFI.SCAN
257
WIFI.SLEEP
257
WLOG [text$ |
num]
257
WORD.DELPARAM setting$,
parameter$, [,separator$]
257
WORD.SETPARAM setting$,
parameter$, value$ [,separator$]
257
BASIC
KEYWORDS
258
CASE
260
DIM array(size) [,
…]
260
DO
260
ELSE
260
END [IF | SELECT |
SUB]
260
ENDIF
260
EXIT {DO | FOR |
SUB}
260
FOR
260
GOSUB [label |
lab$]
260
GOTO [label |
lab$]
260
IF
260
LET var =
expression
260
LOOP
260
NEXT
260
OFF
260
OUTPUT
260
PULLUP
260
PULLDOWN
260
REM
260
RETURN
260
SELECT
260
SPECIAL
260
STEP
260
SUB
260
THEN
260
TO
260
UNTIL
260
WEND
260
WHILE
260
Introduction:
Annex32 WI-Fi RDS (Rapid Development Suite) is
a version of the "BASIC" language developed to run on low cost
ESP-32 WIFI devices.
Annex32 is specifically for the ESP32 range of
devices, whose implemented features can vary greatly.
To offer some standardisation, Annex32 caters
in particular to M5stack devices, which include a micro-SD card
slot, TFT display, speaker, 3 user buttons plus a reset button, and
a lipo battery, all self-contained in a plastic case offering
expansion pin access and designed to accept ‘stackable’ expansion
modules.
All drivers needed for the M5stack features
are already included in the Annex32 firmware, and pre-configured
for the M5stack so that features such as TFT display and SDcard
work by default.
Similar functionality could be built using
alternative TFT display and SD card reader etc, if preferred.
Please refer to the original
M5Stack schematics for more details.
However, M5stack and its hardware features
merely offer a convenient standardised feature set, they are not
mandatory - Annex32 works with any ESP32 devices, with or without
hardware expansion modules.
Obviously appropriate hardware is needed for
any required features - eg: an OLED display could be used, but
scripts written for TFT displays will need modifying for the
different display.
Annex32 can use the internal flash disk space,
or an external SD card.
The internal and the external (SDcard) space
are mutually exclusive and cannot be accessed at the same time.
By default Annex32 will use the SD, if
available, otherwise it will use the internal flash disk space
(FATFS).
Both use the same type file system (FAT32),
enabling the use of long file names and directories.
Depending on the module flash memory size (4,
8 or 16MB), the internal disk space can be from ~1MB to 13MB.
Using the ESP32 partition scheme it is
possible to freely define this space, but modifying it will wipe
out all existing files already stored.
Annex32 Wi-Fi RDS takes from the original
concept of Annex WI-FI RDS for ESP8266 from which it shares
essentially the IDE interface and the same command syntax as much
as possible.
It should be straightforward switching to
Annex32 if coming from Annex, and the same programs should run
without (or with minimum) modifications (eg: pin numbers).
Annex32 Wi-Fi RDS benefits from the powerful
H/W architecture of the ESP32 using both cores and the RAM memory
available. In addition, for modules equipped with PSRAM memory
extension, Annex32 can make available to the users this additional
RAM space (up to 4MBytes).
Functionalities:
-
Includes an internal IDE so can be programmed directly using your
web browser (even from your phone/tablet) without any additional
utility.
-
Syntax highlighting with context-sensitive Help
-
A programmable web server which includes a file server
-
Supports OTA (over the air) update.
-
Support async events (interrupts, timers, web access, UDP, ….)
-
Breakpoints, immediate execution of commands, display of variables,
single step.
-
A basic interpreter with floating point variables (double
precision) and string variables, multi-dimensional arrays (float
and string), user defined subroutines.
-
Access to any available I/O pin for input/output, PWM and
Servo.
-
Errors Handling .
-
Support TCP (HTTP) GET and POST for communications
-
Support for UDP for communications.
-
Support for sending Emails using SMTP SSL servers
-
Support for AJAX communications
-
Support for ESP-NOW communications
-
Support for MQTT communications
-
Support for FTP communications
-
Support for RJ45 wired ethernet using W5500 module
-
Accompanying utility suite includes Flasher, File Manager, HTML
Converter, Backup/Restore to bin or zip, integrated Serial Port
Monitor, OTA (over the air) update server and UDP Console.
-
IMU / AHRS Fusion algorithms 6 DOF and 9 DOF (Madgwick and
Mahony)
-
Play MP3 or WAV sound files or streaming using a speaker or an
external I2S DAC
-
Text to Speech using a speaker or an external I2S DAC
The following
devices are supported directly with dedicated commands / functions
:
-
DHT11, DHT21 or DHT22 Temperature / Humidity Sensors
-
DS18B20 Temperature sensor
-
LCD HD44780 with I2C interface module (1, 2 or 4 lines with 16 or
20 chars per line)
-
LCD Display based on chipset ST7920 with 128x64 pixels
monochrome
-
OLED Display based on chipset SSD1306 or SH1106 with 128x64 pixels
monochrome [1]
-
TFT Display at 16 bits colors based on the following chipset:
-
ILI9341 with 320x240 pixels
-
ILI9163 with several resolutions
-
ST7735 with several resolutions
-
ST7796 with 480x320 pixels
-
ILI9486 with 480x320 pixels
-
TM1637 4 digits 7-segments display
-
TM1638 8 digits 7-segments display including 8 leds and 8
buttons
-
MAX7219 8 digits 7-segments display
-
MAX7219 8x8 dot matrix display modules
-
Neopixel WS2812 led strips
-
Neopixel WS2812 8x8 dot matrix display
-
PCA9685 PWM/SERVO module
-
Infrared interface with many RC protocols (transmission and
reception)
-
RTC module (DS1307 or DS3231)
-
HC-SR04 ultrasonic sensor for distance measurement
-
BNO055 Absolute Orientation Sensor
-
MPU9250 / MPU6500 IMU units
-
MPU6886 IMU unit
-
BME280 Combined humidity and pressure sensor
-
APDS9960 Digital Proximity, Ambient Light, RGB and Gesture
Sensor
-
W5500 RJ45 wired Ethernet interface
-
VL53L0X TOF (Time Of Flight) Distance Sensor
-
Any compatible I2S DAC
Many ESP32 modules
/ units are supported and can be configured using the
“CONFIG” menu:
-
Almost all the ESP32 modules including ESP32 devkit, ESP32 wemos
mini, ESP32 lolin lite, ...
-
M5Stack
-
M5 Atom
-
M5 Atom matrix
-
M5 Atom Echo
-
ESP32-CAM
-
M5CAMERA
-
ODROID GO
Interpreter:
The basic interpreter works by reading a
script file saved to the esp local disk filing system.
This is the default mode if no external
SDcard(s) are connected to the ESP32.
In addition, Annex32 can use an external
SDcard as file system permitting up to 16Gbytes of disk space.
During the startup, if an external SDcard is
detected it will be automatically connected and used as the default
file system, in which case the internal filing system will not be
used.
Because the ESP32 contains a good quantity of
RAM, the user script is copied from the disk into a dedicated
area in the RAM memory where it is executed, together with the list
of the program lines, the branch labels and the list of the user
defined subroutines..
This uses more RAM compared to other
approaches, but allows faster program execution.
Another performance consideration is that the
ESP32 must be capable of executing several activities in the
background (web server, file server, etc..) so needs sufficient
free memory for running such tasks, and those parallel tasks will
obviously have an impact on script performance..
So performance-wise, the interpreter is not
particularly fast, but it should be fast enough for most tasks you
may require. In particular it is around 2 times faster than Annex
for ESP8266, considering that many tasks can run in parallel
without any appreciable performance impact (such as playing music
in the background).
Basic program lines :
A typical script line should comply with the
following syntax :
[label:]
command [argument1 [,argument2 …..]]
Script lines may contain several commands on
the same line if separated by the colon character ":".
[label:]
command1 [argument1 [,argument2 …..]]: command2 [argument1
[,argument2 …..]]
All program jumps (eg: GOTO, GOSUB) are
referenced by their branch label names - line numbers are not
referenced in scripts, they are merely available in the editor as a
programming convenience if wished, and for error
references[2] .
Branch labels
Branch labels should not be named the same as
a command name, and must follow the same format as variables (see
below).
A branch label definition must begin the line,
and a colon (":") must terminate the label definition.
Any references to the defined label (GOTOs and
GOSUBs etc) do not use a colon.
Example :
b
= 10
a
= 20 : c = 30
GOSUB LABEL1
END
LABEL1:
print "Label1"
RETURN
|
Variables:
The interpreter has 2 types of variables:
-
Floating Point (double precision)
-
String
Floating point variables can store numbers
with decimal point; they can also store integer numbers with a
precision equivalent to 32bits.
Strings contain sequences of characters
(example "my program") and must be terminated by "$".
The strings are not limited in size, they are
only limited by the amount of memory available.
NOTE: The string variables cannot contain
the character with ASCII code 0 (zero) because it is used
internally as an end of string delimiter.
The variables are defined as any name starting
with an alpha character (a, b, ..z) followed by any alphanumeric
character (a..z, 0..9); it can also include the "_"
(underscore).
The case is don’t care, so ‘’Num"
is equivalent to "nuM".
The variable name length is limited to 31
characters maximum, including the "$" for the strings.
There are no limits in terms of number of
variables; the only limit is the RAM memory available.
Example:
NUM = 10.56
myString$ = "this is My
String"
this_is_my_value$
= "ESP8266"
number = 8826621
|
Numeric variables and string variables are
managed separately so the same name can be used; this means that
A and A$ are different variables that can coexist at
the same time (even if this could lead to confusion).
Constants:
The numeric constants can have the following
format :
A =
5 : Z = 1.5
B =
1.23456E5 -> same as 123456
C =
1.23456E+5 -> same as 123456
D =
1.23456E-3 -> same as 0.00123456
The string constants are simply defined as a
text between quotes:
A$
= "This
is my string" : B$ =
"another string"
The strings can include the character "
(quote) simply typing it two times :
A$
= "this
is ""MY"" string"
The | (vertical bar) can also be used
as a string literal.
This permit to include the " (quote) easily
inside a string constant :
A$
= |this
is a "string" constant|
The hexadecimal constants can be defined
simply prefixing it with &h :
E
= &hABCD -> equivalent of decimal
43981 (hexadecimal constant)
F
= &hA0 -> equivalent of decimal
160
The binary constants can be defined simply
prefixing it with &b :
E
= &b00000101 -> equivalent of decimal
5 (binary constant)
F
= &b10000001 -> equivalent of
decimal 129
The octal constants can be defined simply
prefixing it with &o :
E
= &o377 -> equivalent of decimal 255
(octal constant)
F
= &o17 -> equivalent of decimal
15
Arrays:
Arrays are defined using the DIM
command.
Their names follow the same rules as the
regular variables and are followed by parenthesis (brackets)
containing the index. The subscript always starts from 0.
The scope of the Arrays is always global (see
next paragraph).
Example:
DIM
A(100)
define a floating point array with 101 elements (index
from 0 to 100)
DIM
ABC$(50)
define a string array with 51 elements
(index from 0 to 50)
A(15) = 1234.5678
ABC$(49) = "Hi friend!"
The arrays can have up to 5 subscripts
(dimensions), examples:
DIM
A(50,50) -> create a floating point array with
51*51 elements (2601)
DIM
J$(4, 4, 4) -> create a string array with 5 * 5
* 5 elements (125)
Notice that declaring a multi-dimensional
array with multiple subscripts uses elements for every
possible[3] [4] [5] combination of
subscripts, whereas in practice it may be preferable to declare
multiple arrays with the same subscript, eg:
users=4
DIM Name$(users)
DIM Address$(users)
DIM Tel$(users)
Which only uses 5 + 5 + 5 elements
(15)
NOTE:
The numerical Arrays are always
initialised at 0 with the command DIM.
The string Arrays are always initialised
as null string with the command DIM.
There are no limits to the number of
arrays or their size, the only restriction is the RAM memory
available.
The arrays can be re-dimensioned using the
same command DIM.
In this case all the existing elements will
maintain the previous value except the new elements that will be
initialised at 0 or null string.
Example :
DIM A(5)
' all the elements are initialised at
0
A(0)
= 123
Print A(0)
' print 123
Dim A(10)
Print A(0)
' print the same value
123
Print A(10)
' print 0
|
In addition the elements of the arrays can be
initialised with a given value during the command DIM.
Example :
DIM
A(5) = 0, 1, 2,
3, 4, 5 ' set A(0)= 0,
A(1)= 1, A(2)=2, ….
The same can be done with string arrays.
Example :
DIM
A$(5) =
"zero", "one", "two", "three", "four", "five"
Scope of the variables:
Variables and arrays defined in the main code
are global, therefore any variable is accessible from any part of
the code after it has been previously defined there.
Variables and arrays defined inside
“user defined” subroutine (SUB) are visible only inside that sub
and inside all the code called by that subroutine; their content
(and their memory space) is removed at the end of the SUB
The LOCAL command permits defining local
variables inside of "user defined" subroutines; this permits to use
the same name of an “already existing” variable locally without
modifying the original.
As for all the variables defined inside SUB,
they will disappear at the end of the subroutine.
Example:
A
= 10
B
= 20
C
= 30
mysub
"Hello"
PRINT A,B,
C
END
SUB mysub(a$)
LOCAL A,B
A
= 123
B
= 456
C
= 789
D
= 8888
PRINT A$, D
END
SUB
|
In this example, calling the user-defined
subroutine "mysub" will not modify the content of the global
variables A and B (defined locally) but will modify the content of
the variable C (not defined locally) and the variable D will
disappear at the end of the SUB.
Bases of the language
The keywords recognized by the interpreter can
be defined into 3 classes:
●
Operators
●
Commands
●
Functions
The Operators are symbols that tell the
compiler to perform specific mathematical or logical
manipulations.
Commands and Functions both execute an action,
but functions also return a data value.
For example
PRINTis a command and
SIN()
is a function whereas the ‘+’ in a = b
+ 5 is an operator.
The string functions are always followed by
the "$" symbol if they return a string value.
In addition to commands and functions there
are all the internal interpreter internal commands that are part of
the language itself.
OPERATORS AND PRECEDENCE
The following operators are available. These
are listed in the following tables by order of precedence.
Operators on the same line are processed with a left to right
precedence.
Arithmetic operators:
^
|
Power
|
* / \ MOD
|
Multiplication,
division, integer division and modulo (remainder of the
division)
|
+ -
|
Addition and
subtraction
|
Shift operators:
x <<
y
x >> y
|
These operate in a
special way. << means that the value returned will be the
value of x shifted by y bits to the left while >> means the
same only right shifted. They are integer functions and any bits
shifted off are discarded and any bits introduced are set to
zero.
For more
information about the kinds of bitwise shifts, see Bitwise shifts.
|
Logical operators:
<> <
> <=
=>
=
|
Not Equal, less
than, greater than, less than or equal to,
greater than or
equal to, equal
|
AND OR NOT XOR
|
Conjunction,
disjunction, negation, Exclusive OR
|
String operators:
<> <
> <=
>=
=
|
Not Equal, less
than, greater than, less than or equal to,
greater than or
equal to, equal
|
+ &
|
Add strings
together
|
Bitwise operators:
AND OR XOR NOT
|
Binary AND, binary
OR, binary exclusive OR, binary negation
For more
information about the bitwise operators, see
Bitwise Operators
|
The operators AND, OR and XOR are integer
bitwise operators. For example PRINT (3 AND 6) will output 2.
Expressions beginning with open parenthesis
‘(‘ are always considered numerical but the parser is able to
determine if an expression is true or false even if the expression
represents a string.
Each expression representing a comparison,
returns a numerical value of 1 if the expression is true or 0 if
false.
For example 10 = 10 represents a value of 1
whereas 10 = 5
represents a value of 0.
The same logic is applied for string
expressions where "abc" =
"abc" represents a value of 1 and "abc" = "def" represents a
value of 0.
This is very useful in the IF command and also
in other expressions.
For example the following code :
A$ = "on"
If
A$ = "on"
then
pin(4)
= 1
Else
pin(4)
= 0
End
if
|
Can be replaced by
pin(4)
= (a$ =
"on")
The strings can also be compared to determine
the alphabetical order.
To see whether a string is greater than
another, Annex uses the so-called “ASCII” order.
In other words, strings are compared
letter-by-letter.
For example:
("Z"
> "A") is true
("Glow"
> "Glee") is true
("Bee"
> "Be") is true
("Bas"
> "Bat") is false
The algorithm to compare two strings is
simple:
Compare the first character of both
strings.
If the first character from the first string
is greater (or less) than the other string, then the first string
is greater (or less) than the second. We’re done.
Otherwise, if both strings’ first characters
are the same, compare the second characters the same way.
Repeat until the end of either string.
If both strings end at the same length, then
they are equal. Otherwise, the longer string is greater.
In the examples above, the comparison
"Z" > "A" gets
to a result at the first step while the strings"Glow" and "Glee" are compared
character-by-character:
-
G is the same as G.
-
l is the same as l.
-
o is greater than e. Stop here. The first string is greater.
The comparison algorithm given above is
roughly equivalent to the one used in dictionaries or phone books,
but it’s not exactly the same.
For instance, case matters. A capital letter
"A" is not equal to the lowercase "a". Which one is greater?
The lowercase "a". Why? Because the lowercase
character has a greater index in the ASCII table.
Basic internal keywords:
IF command :
The IF can have the following syntax :
1) IF
expression THEN statement
2) IF
expression THEN statement1 ELSE statement 2
3) IF
expression THEN
Statements
ELSE
Statements
END IF
Example:
IF a
> 100 THEN print
"a"
IF b
<a THEN print
"b" ELSE print
"a"
IF c
> d THEN
print "C"
print "is greater"
ELSE
print "D"
print "is greater"
END
IF ' (can also be ENDIF
without space between END and IF)
|
When the conditional is all on one line it
does not need terminating with an END IF
Example
IFa=2
THEN
PRINT "ok"
ELSE PRINT "not
ok"
The AND ,
OR keywords can be used
between the expressions as long as they are in
parenthesis.
Example:
IF
(a=1)
AND (b=2)
THEN PRINT "ok"
Or
IF
((a=2)
AND (b=3)
AND (c =
3)) OR (d=4)
THEN PRINT "ok"
The IF can be nested
Example:
IF
a=2 THEN
IF b = 2
THEN
IF c = 3 THEN
PRINT "ok"
END IF
END IF
END
IF
|
The “THEN” keyword can eventually be removed,
even if this is not recommended.
Example:
IF
a > 100 print
"a" else print
"b"
FOR loop
The FOR loop can
have the following syntax :
FOR
variable=init_value to end_value [step
value]
Statements
NEXT
variable
The ‘step’ value can be positive or
negative
Example:
FOR
i=1 to
5
Print i
NEXT
i
Will print 1, 2, 3, 4, 5
FOR
i=1 to 3
step 0.5
Print i
NEXT
i
Will print 1, 1.5, 2, 2.5, 3
FOR
i=3 to 1
step -0.5
Print i
NEXT
i
Will print 3, 2.5, 2, 1.5, 1
The command
EXIT
FOR can be
used to exit from the loop at any time:
FOR
i=1 to
50
IF
i=10 THEN
EXIT FOR
Print i
NEXT
i
Print
"end of loop"
Optionally, the variable in the
NEXT statement
can be omitted.
This means that this program is valid :
FOR
i=1 to
5
Print i
NEXT
WHILE WEND loop
The WHILE
WEND loop can have the following
syntax :
WHILE
expression
Statements
WEND
The loop is iterated as long as the expression
is true
Example:
i
= 0
WHILE
i < 3
Print i
i = i +
1
WEND
Will print 0, 1, 2
DO LOOP loop
The DOLOOP
can have one of the following 4 syntax :
DO
WHILE expression
Statements
LOOP
DO
UNTIL expression
Statements
LOOP
DO
Statements
LOOP
WHILE expression
DO
Statements
LOOP
UNTIL expression
The command
EXIT
DO can be used to exit from the
loop at any time
Example
i
= 0
DO
Print
i
i = i
+ 0.5
LOOP
UNTIL i >3
Will print 0, 0.5, 1, 1.5, 2, 2.5, 3
i
= 0
DO
Print
i
i = i
+ 0.5
IF
i > 2 THEN
EXIT DO
LOOP
UNTIL i >3
Will print 0, 0.5,
1, 1.5, 2
SELECT CASE
The SELECTcan
have the following syntax:
SELECT
CASE expression
CASE exp1 [: Statements]
Statements
CASE exp2 TO exp3 [: Statements]
Statements
CASE exp4 [,exp5],
... [: Statements]
Statements
CASE ELSE
Statements
END
SELECT
Example:
a =
4
SELECT
CASE a
CASE 1
PRINT "case
1"
CASE 2 :
PRINT "case 2"
CASE 3 :
PRINT "case 3" : PRINT "can continue
on same line"
CASE 4 :
PRINT "case 4"
PRINT "can continue
also on next line"
CASE ELSE:
PRINT "case
else"
END
SELECT
Multiple cases:
a =
4
SELECT
CASE a
CASE1 :
PRINT "case 1"
CASE 2, 3, 5
: PRINT "case 2 or 3 or 5"
CASE4 :
PRINT "case 4"
CASE 6 TO
8 : PRINT "case 6 to 8"
CASE 9 TO 20
: PRINT "case 9 to 20"
CASE ELSE:
PRINT "case
else"
END
SELECT
GOTO
The GOTOcan have
the following syntax :
GOTO
[LABEL | LAB$]
Example
a =
5
IF a
> 5 THEN GOTO
LABEL1
END
....
LABEL1:
PRINT
"This is label1"
....
The goto must be
considered as an obsolete command and is provided just for backward
compatibility with old style Basic programs.
GOSUB
The GOSUBcan have
the following syntax :
GOSUB
[LABEL | LAB$]
The called function
must terminate with the command RETURN
Example
a =
5
IF a
> 5 THEN GOSUB LABEL1
END
....
LABEL1:
PRINT
"This is label1"
RETURN
DATA
The command DATA is used to store constant
information in the program code, and is associated with the command
READ. Each
DATA-line can contain one or more constants separated by commas.
Expressions containing variables will be also evaluated
here.
The goal of the DATA is to avoid repetitive
variable assignation lines, in particular for arrays.
The DATA values will be read from left to right, beginning with the
first line containing a DATA statement. Each time a READ
instruction is executed the saved DATA position of the last READ is
advanced to the next value. Strings must be written in quotes like
string constants. The command RESTORE
resets the pointer of the current DATA position, so the next READ
will read from the first DATA found from the beginning of the
program.
In case READ uses the wrong variable type the error message
"Type mismatch" appears while referring to the line number
containing the READ statement that triggered the condition.
DATA lines may be scattered throughout the
whole program code, but for the sake of clarity they would be
better kept together at the beginning of the program.
The DATA can have
the following syntax :
DATA const1
[,const2] …..
The constants can
be Numerical or String.
Example :
DATA 1, 55.88,
"constant", 99
READ A, B, C$,
D
PRINT A, B, C$,
D
Example without
DATA:
dim colors$(5)
colors$(1)
= "Red"
colors$(2)
= "Green"
colors$(3)
= "Blue"
colors$(4)
= "Yellow"
colors$(5)
= "Magenta"
Same example but
using DATA:
DATA
"Red", "Green",
"Blue", "Yellow", "Magenta"
dim colors$(5)
For i=1
to 5
Read colors$(i)
Next i
END
Define the end of
the program. With this command the program stops.
It can also be
:
END IF -> close the IF command
END SELECT -> closes the SELECT CASE command
END SUB -> closes the user defined SUB
EXIT
Permit to exit from
a loop or a user defined SUB.
The syntax is :
EXIT
DO -> exit from a DO loop
EXIT
FOR
-> exit from a FOR loop
EXIT
SUB
-> exit from a user defined SUB.
SUB
Define a
user-defined subroutine, which the script can use like a command or
function.
User-defined
subroutines are effectively additional commands, so cannot be used
as branch labels.
Permit to create a
user defined command with optional parameters.
The syntax is SUB
subname[(arg1 [,arg2] …)]
The variables are
passed by reference; this means that the arguments, if modified
inside the subroutine, will modify the original variable. This can
be useful to return values from the subroutine (acting like a
function).
It is possible to
pass arrays using the syntax array_name().
Using the
LOCAL command will permit to define local variables (useful
to avoid to modify existing global variables).
Example 1 :
routine cube
SUB
cube(x)
PRINT X ^3
END
SUB
cube 3 ' will print 27
|
Example 2:
routine cube with returning argument
SUB
cube(x,y)
y = x ^3 ' the value is returned using the 2nd
argument
END
SUB
ret
= 0
cube 5,
ret
PRINT
ret
' will print 125
|
Example 3:
routine with local variables and returning argument
SUB left_trim(s$,
ret$)
LOCAL i
i
= 1
DO UNTIL i =
len(s$)
IF
mid$(s$, i, 1) <>
" " THEN EXIT
DO
i = i + 1
LOOP
ret$ = mid$(s$,
i)
END
SUB
z$
= ""
FOR i
= 1 to 3
left_trim " remove space from
left ", z$
PRINT z$ + "--"
NEXT i
|
Will print
remove space from
left --
remove space from
left --
remove space from
left --
As you can see in
this example, the variable i in the FOR loop is not modified by the
LOCAL variable i in the subroutine.
Example 4:
pass arrays
SUB pass_array(f(),
c$())
Dim myArray(10)
myArray(0)
= 456
Print f(0),
c$(0), myArray(0)
f(1) =
123
c$(1) =
"myText"
END
SUB
Dim alpha(10)
Dim beta$(10)
alpha(0)
= 456
beta$(0)
= "testme"
Pass_array
alpha(), beta$()
Print alpha(1),
beta$(1)
|
In this example,
the array alfa() is passed locally to the array f()
and the array beta$() is passed locally to the array
c$().
Modifying locally
these arrays change the value of the original one as their content
is passed by reference.
The array
“myArray” will disappear at the end of the SUB
Logical
/ boolean Operations
As the numerical
variables are stored internally as double precision floating
number, it is possible to store numbers with a precision equivalent
to 32 bits.
Several boolean
operators are available to manipulate these numbers..
The first operator
is the bit shift; it can be shift left
<< or shift right >>
This operator
permit to shift the number of a specified number of positions to
left or right.
Example
A
= 1
Print A
<< 3 ' will print 8
A
= 16
Print A
>> 2 ' will print 4
The operators
AND
,
OR ,
XOR are also available :
A
= 24
A
= 15
Print A
AND B '
will print 8
A
= 24
A
= 15
Print A
OR B '
will print 31
A
= 24
A
= 15
Print A
XOR B '
will print 23
The unary operator
NOT
is also available. It inverts all the bits from 0 to 1:
A
= 0
Print
Hex$(NOT A)
' will print
FFFFFFFF
For a 32 bits
number, assuming 4 bytes ABCD where A is the MSB and D the LSB, the
bytes can be extracted as follows :
VAR
= &h12345678 ' this is a 32 bits variable
D = VAR
AND &hFF
C = (VAR
>> 8) AND
&hFF
B = (VAR
>> 16) AND
&hFF
A = (VAR
>> 24) AND
&hFF
For more
information, see
Bitwise
Operators
ERRORS
HANDLING
Annex allows to control and manage errors that
occur during the execution of the code.
This is managed with the command ONERROR.
This command defines what action is taken when
an error occurs, and applies to all errors, including syntax
errors.
It can be used in different ways, as specified
in the table below:
FUNCTIONS / COMMANDS
|
DESCRIPTION
|
ONERROR
ABORT
|
Displays the error message then aborts the
program.
This is the normal behaviour and is the
default when a program starts running.
|
ONERROR
IGNORE
|
Any error will be simply ignored.
As this can make it very difficult to debug a
program it should be used wisely.
|
ONERROR
SKIP
[nn]
|
Ignore an error in the next command(s)
executed after the current command (the number of skipped commands
depends on whether the number ‘nn’ is specified).
'nn' is optional, the default is 1
if not specified.
After the number of skipped commands has
completed (with an error or not) the behaviour will revert to
ONERROR ABORT.
|
ONERROR
CLEAR
|
Reset the eventual pending error
|
ONERROR
GOTO [label
| OFF]
|
Jumps to the error handling routine defined by
the label.
It can be removed (hence reverting to ONERROR
ABORT) replacing the label with OFF.
Using RETURN inside the error handling routine
will continue the execution on the line following the error.
|
When an error occurs, the following constants
are available :
CONSTANT
|
DESCRIPTION
|
BAS.ERRLINE
|
Returns the line
number where the error happened. Value of 0 means no error.
It is reset to 0
with the command ONERROR CLEAR or running the program or with
the command ONERROR IGNORE or ONERROR SKIP.
|
BAS.ERRNUM
|
Returns a number
where non zero means that there was an error.
It is reset to 0
with the command ONERROR CLEAR or running the program or with
the command ONERROR IGNORE or ONERROR SKIP.
|
BAS.ERRMSG$
|
Return a string
representing the error message that would have normally been
displayed on the console. It is reset to “No Error” running the
program or with the command ONERROR CLEAR or ONERROR IGNORE or
ONERROR SKIP.
|
Example of error handling using the command
ONERROR GOTO :
ONERROR
GOTO
Error_Handler
Print
"start"
Print
3/0
' this generates a divide by zero
error
Print
space$(60000)
' this generates an out of memory
error
End
Error_Handler:
Print
"Error text
"; BAS.ErrMsg$
Print
"Error
num "; BAS.ErrNum
Print
"Error line
"; BAS.ErrLine
Return
' returns to
the line following the error
|
HOW the
interpreter works with the HTML code and Objects :
When a client
connects to the module using its IP address, the module will
redirect automatically to the url ‘/output?menu’, which sends an
empty html page present on the module.
That page contains
a bunch of javascript code permitting to interface the page with
the module using javascript.
This page will
automatically open a websocket connection with the module; the
"squared led" indicates if the connection was successful (green) or
not (red).
A mechanism of ping
- pong has been implemented into the javascript in order to hold
the connection alive all the time. If the connection is lost, the
page will try to reconnect automatically without any manual
action.
The button
"reconnect" permit to force the reconnection if the automatic
reconnection fails.
As soon as the
connection is done with the module, the html page is ready to send
and receive messages to / from the module.
Initially the page
is empty but its content can be easily filled.
To send HTML code
to the page, the command HTML is used.
The syntax is :
HTML HTML code.
For example the
line
HTML
"Hello, world <br>This is my first html
content<br>"
Will give this
result :
Continuing with the
HTML command, the content can be improved :
HTML
"Textbox: <input
type='text'><br>"
Continuing
again:
HTML
"Button: <button type='button'>Click
Here</button>"
All the html code
can be combined and sent with just one HTML command; this is much
faster:
a$ =
"Hello, world <br>This is my
first html content<br>"
a$ = a$
+ "Textbox: <input
type='text'><br>"
a$ = a$
+ "Button: <button type='button'>Click
Here</button>"
HTML
a$
|
To clear the
content of the page, the command is:
CLS
Now we can try
another example
CLS
a$ =
"Now style me,
please<br>"
a$ = a$
+ "Button1: <button id='but1'
type='button'>ON</button> "
a$ = a$
+ "Button2: <button id='but2'
type='button'>OFF</button>"
HTML
a$
Now we will try to
style the buttons using css.
This can be done
using command CSS CSSID$()
For example the
line
CSS
CSSID$("but1",
"background-color:
red;")
Will give this
result :
Combining with the
style for the other button:
a$ = a$
+ cssid$("but1",
"background-color:
red;")
a$ = a$
+ cssid$("but2",
"background-color:
green;")
CSS
a$
A set of functions
is included to simplify the creation of HTML pages as we will see
later, so no need to worry if you are not familiar with writing
HTML code.
Now we will mention
an important ‘event’ that can be used to automatically fill the
content of the page each time a client connects to the module :
OnHtmlReload.
This ‘event’
defines a place where the program will jump to as soon as a
Websocket connection request is accepted.
Let’s clarify with
an example :
OnHtmlReload
Fill_Page
‘will jump to Fill_Page when the
page is reloaded
gosub
Fill_Page
'load the page for the first
time
Wait
‘pause waiting for the event
Fill_Page:
‘place where the page begins to
be created
CLS
a$ = "Now style me,
please<br>"
a$ = a$ +
"Button1: <button id='but1'
type='button'>ON</button> "
a$ = a$ +
"Button2: <button id='but2'
type='button'>OFF</button>"
HTML
a$
a$ = cssid$("but1",
"background-color:
red;")
a$ = a$ +
cssid$("but2",
"background-color:
green;")
HTML
a$
RETURN
|
The result will
be:
Now try to play
with the button "Reconnect"; you’ll see that, at each time the page
reconnects to the module, the HTML content is built and sent again.
This ensures that each time a client connects to the module it will
receive the correct content. At the same time, if other clients are
already connected, the content of all the pages will be refreshed
simultaneously. This ensures a synchronized content between all the
clients.
HTML Objects
As said previously,
in order to simplify the creation of HTML pages there are several
functions available which can generate the html code
automatically.
Let’s start with
the button.
A button is an
object that is used to trigger an action each time it is pressed on
the web page.
The function is
BUTTON$.
Let’s explain with
an example:
CLS
HTML
BUTTON$("Button1", jump1)
Wait
'pause waiting for the
event
Jump1:
PRINT
"Clicked on Button1"
Return
|
The result will
be:
Try clicking on the
button then checking the result in the terminal console; the
message "Clicked on Button1" will be shown at each click.
To style the
button, we need to modify the syntax of the BUTTON$
command slightly; in fact we need to add another parameter to give
the button an ID:
CLS
HTML
BUTTON$("Button1", jump1, "but1") '
"but1" is the ID
Wait
'pause waiting for the
event
Jump1:
PRINT
"Clicked on Button1"
CSS
cssid$("but1",
"background-color:
red;") 'the same ID is used here
Return
|
Clicking on the
button now will change its color to red
Now we can now
introduce the LED object. The LED object, is a circle that can be
filled in red or green depending on the content of a variable. The
function is LED$
As usual, let’s
start with an example:
CLS
led = 1 ‘this is the variable
associated with the LED. With 0 the led is red, with 1 the led is
green
HTML
LED$(led)
|
The result will
be:
Let’s also add a
button :
CLS
led
= 0
a$
= BUTTON$("Button1", jump1, "but1") '
"but1" is the ID
a$
= a$ + LED$(led)
HTML
a$
Wait
'pause waiting for the
event
Jump1:
PRINT
"Clicked on Button1"
led
= 1 -
led ' invert the
variable
REFRESH
' refresh (update) the variables between the code
and the html
Return
|
The result will
be:
Clicking on the
button will toggle the led between red and green colors.
The command
REFRESH
permits to update (synchronize) the variables in the code with the
corresponding objects variables on the web page. It should be run
each time a variable is modified.
As a simpler
alternative, the command AUTOREFRESH
will regularly sync the variables.
The command must be
run with the desired refresh timing.
Example
AutoRefresh
500 will refresh the variables each 500
milliseconds.
The interval should
not be less than 300 milliseconds (otherwise the module will be too
busy).
The example :
CLS
led = 0
a$ = BUTTON$("Button1", jump1, "but1") '
"but1" is the ID
a$ = a$ +
LED$(led)
HTML
a$
AutoRefresh
300
'sync each 300
milliseconds
Wait
'pause waiting for the
event
Jump1:
PRINT
"Clicked on Button1"
led = 1 - led
' invert the
variable
Return
|
The result will be
the same as the previous example.
Now it’s time to
introduce another object; the TEXTBOX with the corresponding
function TEXTBOX$.
The TEXTBOX will
display a ‘text box’ on the web page which is linked with a
variable. When the variable is modified in the code, the TEXTBOX
content will be updated on the web page, and vice-versa.
This lets us
introduce another ‘event’, the OnHtmlChange
command.
This ‘event’
defines a branch for the program to jump to whenever a variable is
modified inside the web page.
As usual, let’s
start with an example:
CLS
text$ = "Change me,
please"
HTML
TEXTBOX$(text$)
OnHtmlChange
Jump1
'will jump to Jump1 when a variable
changes on the web page
Wait
'pause waiting for the
event
Jump1:
Print
text$
'print the content of the variable
inside the terminal console
Return
|
Try now to change
the content of the textbox and press "Enter" on the keyboard.
Let’s see the
result in the terminal console:
With the concepts
already learned you’ll be able to use the other objects using the
similar logic.
Refer to the pages
below to understand the syntax of each object.
TIMERS
A timer is an "object" that permits to execute
a particular action at regular intervals.
When the given time expires, the normal
execution of the program is interrupted while control is passed to
the "timer interrupt routine" until after the execution of the
return command.
Then the program continues from the point
where it was interrupted.
Let’s explain with an example :
timer0
1000,
mytimer
wait
mytimer:
wlog "mytimer " +
time$
return
|
Annex WI-Fi Basic
implements 2 timers, Timer0 and Timer1.
The Timer0 has a
higher priority against Timer1.
Many of the actions
are not executed directly by basic commands but can be executed as
asynchronous events.
An "event" is
simply an action that can be executed when something happens.
For example, pin
change interrupts are asynchronous events which can happen at any
time without user control.
In order to manage
the events, a list of commands "ONxxxx" is provided. These commands
define the place where the normal execution of the program will
branch to when the event occurs.
So, when the
"event" happens, the basic interpreter interrupts the normal
execution of the code and "jumps" to the location defined by the
corresponding command "ONxxx". As soon as the code associated with
the "event" is terminated with the command "return", the basic
interpreter continues from the previous interrupted location.
Button Event
This is a special event that happens every
time aBUTTON$
object is clicked in the HTML pages.
When this happens,
a special variable
HtmlEventButton$ is created containing the name of the
button that was clicked.
This is useful to
determine the button within a group of buttons.
Let’s see an
example:
CLS
HTML
Button$("ON",
buttonEvent) +
" " + Button$("OFF",
buttonEvent)
wait
buttonEvent:
print
"You clicked
on ";
HtmlEventButton$
return
|
OnHtmlChange Event
This event is triggered when an object present
in the HTML output page changes its value.
It is useful to make actions when something
changes in the HTML Pages.
When this event
happens, a special variable
HtmlEventVar$ is created containing the name of the
variable that changed its value.
This is useful to
determine the object that generated the event.
Let’s see an example :
CLS
text$ = "Change me,
please"
HTML
TEXTBOX$(text$)
OnHtmlChange
Jump1
'will jump to Jump1 when a variable
changes on the web page
Wait
'pause waiting for the
event
Jump1:
Print
text$
'print the content of the variable
inside the terminal console
Return
|
Note that the
special variable
HtmlEventVar$ is only created when the OnHtmlChange
event populates it due to a html object change, therefore it will
cause an error if tested for before an object is changed unless
specifically defined beforehand, eg: HtmlEventVar$ =
“”
OnHtmlReloadEvent
This event is triggered when a Websocket
connection request is accepted.
This can be used to automatically fill the
content of the WEB page each time a client connects to the
module.
Let’s see an example :
CLS
OnHtmlReload
Fill_Page
'will jump to Fill_Page when the page
is reloaded
gosub
Fill_Page
'load the page for the first
time
Wait
'pause waiting for the
event
Fill_Page:
'place where the page begins to be
created
CLS
a$ = "Now style me,
please<br>"
a$ = a$ +
"Button1: <button id='but1'
type='button'>ON</button> "
a$ = a$ +
"Button2: <button id='but2'
type='button'>OFF</button>"
HTML
a$
a$ = cssid$("but1",
"background-color:
red;")
a$ = a$ +
cssid$("but2",
"background-color:
green;")
HTML
a$
Return
|
OnInfrared Event
This event is
triggered when a code is received by the infrared receiver.
Refer to chapter
INFRARED INTERFACE for more details.
OnSerial Event
This event is
triggered when a message is received on the serial port.
Example:
print
"Ram Available "; ramfree
onserial rec1
wait
rec1:
'print serial.input$
print serial.chr$;
return
|
OnSerial2 Event
This event is
triggered when a message is received on the serial port #2.
Example
serial2.mode 9600, 2, 5
' set serial port #2 to 9600 pin 2 TX,
pin 5 RX
print2 "Ram Available "; ramfree
onserial2 rec2
wait
rec2:
print serial2.input$
return
|
OnTouch Event
This event is
triggered when the TFT screen is touched.
Refer to the
chapter TouchScreen for more details.
OnUDP Event
This event is
triggered when a UDP message is received.
Example:
udp.begin
5001
'set the UDP commmunication using port
5001
onudp
goudp
'Write several messages to the port
for i
=
0 to 100
udp.write
"192.168.1.44",
5001,
"Hello "
+
str$(i)
next i
wait
goudp:
v$
=
udp.read$
'receive the UDP data
print
v$
return
|
OnWgetAsync Event
This event is
triggered when a WgetAsync message is received.
This is associated
with the command WGetAsync http_server$, port.
The goal of the
WGetAsync command is to start a html get request without the module
having to wait for the answer.
Because the
response is async, this command specifies the location where the
program should branch to when a message is received.
Example:
ONWGETASYNC
answer_done
WGETASYNC("www.fakeresponse.com/api/?sleep=5",
80)
For
i =
0 to
10000
' a
kind of sleep just to demonstrate that the code continue to
run
Print i
Next
i
Wait
answer_done:
Print
WGETRESULT$
Return
|
OnUrlMessage Event
This event is
triggered as soon as a web client requests for a web page with the
url composed with http://local_ip/msg?param=value.
This kind of request is typically called an AJAX request as it
permits to exchange in both directions between the client (the web
browser) and the server (the ESP module).
In fact, in the url
request, the client can send parameters in the form of couples of
"param=value" separated by the character "&". For example, if
the client wants to send 2 parameters, it can send the following
request :
http://local_ip/msg?param1=value1¶m2=value2.
As soon as this
message is received by the ESP module, the event OnUrlMessage is
triggered; this means that the program will continue from the
location defined by the command OnUrlMessage.
As soon as the
message is received, the parameters sent by the client can be got
with the function UrlMsgGet$ and a message can be sent back to the
client with the command UrlMsgReturn.
Let’s see an
example :
onUrlMessage
urlAjax
wait
urlAjax:
wlog
"message received " + UrlMsgGet$("a")
+ "
" + UrlMsgGet$("b")
UrlMsgReturn
"Message sent back " + time$
print
UrlMsgGet$("b"),
ramfree
return
|
Now using another
web browser window, let’s type the following url :
http://esp_local_ip/msg?a=10&b=20
As you can see in
the following picture, the message is received by the ESP
module
At the same time,
the client receives the message sent back from the ESP module
If the program is
stopped, the module will answer with the message "STOPPED"
Now, let’s see a more complete example :
cls
' this is the
default value for pwm out
R
= 512
G
= 512
B
= 512
'Setup the
pwm channels
PWM.SETUP
12, 1, R,
10000, 10
PWM.SETUP
15, 1, G,
10000, 10
PWM.SETUP
13, 1, B,
10000, 10
'Set the
default values
PWM.OUT
1,
R
PWM.OUT
2,
G
PWM.OUT
3,
B
' these are
the sliders
a$
= ""
a$
= a$ + |R <input
type="range" id="dimmer_R" oninput="setPWM()" onclick="setPWM()"
min="0" max="1023" value="| & str$(R)
& |"/><br>|
a$
= a$ + |G <input
type="range" id="dimmer_G" oninput="setPWM()" onclick="setPWM()"
min="0" max="1023" value="| & str$(G)
& |"/><br>|
a$
= a$ + |B <input
type="range" id="dimmer_B" oninput="setPWM()" onclick="setPWM()"
min="0" max="1023" value="| & str$(B)
& |"/><br>|
a$
= a$ + |<input
type='text' id="txbox" value='---'>|
html
a$
'this is the
javascript "AJAX" code
fun$
= |function setPWM() {|
fun$
= fun$ & |r=_$("dimmer_R").value;|
fun$
= fun$ & |g=_$("dimmer_G").value;|
fun$
= fun$ & |b=_$("dimmer_B").value;|
fun$
= fun$ & |var xmlHttp =
new XMLHttpRequest();|
fun$
= fun$ & |xmlHttp.open("GET", "msg?r=" + r +"&g=" + g
+"&b=" + b, false);|
fun$
= fun$ & |xmlHttp.send(null);|
fun$
= fun$ & |r =
xmlHttp.responseText;|
fun$
= fun$ & |_$("txbox").value = r;|
fun$
= fun$ & |return
r;}|
' this is
where the javascript code is inserted into the html
jscript
fun$
'this is
where the prog will jump on slider change
onUrlMessage
message
wait
message:
print
UrlMsgGet$()
PWM.OUT
1,
val(UrlMsgGet$("r"))
PWM.OUT
2,
val(UrlMsgGet$("g"))
PWM.OUT
3,
val(UrlMsgGet$("b"))
UrlMsgReturn
UrlMsgGet$()
return
|
Open the input page in another window and run
the program
Using an external RGB led, you’ll be able to
directly control its color.
You’ll see how the exchanges can be fast using
AJAX exchanges. This program uses javascript embedded into the
code. The javascript works with the function XMLHttpRequest.
A good reference for this function is here
AJAX - Send a Request To a Server
OnEspNowMsg Event
This event is
triggered when a ESP-NOW message is received.
Example:
espnow.begin
' init the ESP-NOW
onEspNowMsg message
' set the place where jump in case of message
reception
wait
message:
print "Message
Received!"
return
|
OnEspNowError Event
This event is
triggered when a ESP-NOW transmission error occurs.
This happens, in
particular, when the receiver device has not received the
message.
espnow.begin
' init the ESP-NOW
espnow.add_peer "60:01:94:51:D0:7D"
' set the MAC address of the receiver
onEspNowError status
' set the place where jump in case of TX error
espnow.write "TX
message"
' send the message
wait
status:
print "TX
error on ";
espnow.error$
' print the error
return
|
OnMQTT Event
This event is generated when a MQTT message is
received
Example:
....
onmqtt
mqtt_msg
wait
' receive messages from the server
mqtt_msg:
print
"TOPIC : ";
mqtt.topic$
print
"MESSAGE: ";
mqtt.message$
return
|
This event is generated when a “metadata” is
decoded when playing mp3 or streaming a web radio.
WiFI CONNECTIONS
At startup, the module will try to
connect to the router using any parameters specified in the page
“Config”.
If no parameters are specified in
the “Config” page, or the connection is unsuccessful, it will
default to AP (Access Point) mode with IP address 192.168.4.1 with
the SSID composed of ESP(+ mac address).
If the connection is successful,
the module will use the IP address defined in the “Config” page or,
if no IP address is specified, the IP will be given automatically
by the Router DHCP server.
After the module has connected to
the router it will try to reconnect automatically if the connection
is lost.
There are several commands /
functions available to manage the WIFI.
The first function is
WIFI.STATUS which permits to get the status of
the connection.
print
WIFI.STATUS ’ print 3 if connected, 6 if
disconnected
The first useful command is
WIFI.CONNECT SSID,
password
This command allows you to connect
to any WIFI network overriding the parameters defined into the’
“Config” page. This function is async so the connection is done in
background, while the program continues to run.
It is then possible to check the
status of the connection using the function
WIFI.STATUS
Example :
WIFI.CONNECT “HOMENET”,
“MyPassword”
print
"connecting"
While
WIFI.STATUS <>
3
Print "."
pause 500
wend
It is eventually possible to control the
output power of the module with the command WIFI.POWER pow
WIFI.POWER 5 ’ set the output power at 5
dBm.
The module can be also put in WiFi sleep mode.
This mode permits to turn off the WiFi reducing the power
requirements of the module; this is very useful for battery
oriented applications or for applications where the WiFi is not
required.
To put the module in “modem-sleep”, the
command to execute is WIFI.SLEEP.
The module will stay in that mode until the
execution of the command WIFI.AWAKE.
After this command, the module will reconnect
automatically to the router (the command WIFI.CONNECT is not
required).
Another function available
is
WIFI.CHANNEL that shows the current Radio
Channel used by the WIFI.
It is also possible to scan for
the WiFi networks accessible around the module.
This can be done using the
command
WIFI.SCAN and the function
WIFI.NETWORKS(network$).
Example :
WIFI.SCAN
While
WIFI.NETWORKS(A$)
=
-1
Wend
Print
a$
The result will be :
Vodaphone, 00:50:56:C0:00:08,
-50, 5
Orange, 00:50:56:C0:32:07, -70,
5
Xxxx,
00:50:56:C0:86:CA,-78, 12
These information represent, in
the order :
SSID, BSSID(mac address),
RSSI(signal intensity), Channel Radio
Another Wifi related command
is
OPTION.MAC
mac$ that
permits to modify the MAC address of the module.
This is very important for the ESP
Now functionality.
Example :
OPTION.MAC
"AA:BB:CC:DD:EE:FF"
In addition, the functions
BAS.SSID$ and
BAS.PASSWORD$ returns respectively the login and
the password used for the STATION wifi connection.
RECOVERY MODE
In case of any IP or Autorun problem
preventing the module from being accessed, it is possible to
temporarily bypass the IP settings of the module and disable the
Autorun file by connecting the serial TX and RX pins together
(GPIO1 to GPIO3) during the startup phase (power up).
This could happen if, for example, a wrong IP
address has been set.
Doing this action when restarting the module
will put it in AP mode with the IP address at 192.168.4.1, just
like a module that has not been configured.
A message “Recovery Mode” will be printed on
the console, but none of the existing files on the module will be
modified, including the internal configuration parameters.
In this mode it will be possible to gain
access to the module for changing such correct wrong IP parameters
using the configuration page.
When the TX/RX link is removed, the module can
be rebooted to the configured settings at next restart.
DATE - TIME timekeeper
The ESP module normally synchronises its date
and time from either of two NTP time servers ("pool.ntp.org" and
"time.nist.gov"). Optionally an alternative (eg: intranet) time
server can be defined using the [CONFIG] page.
Using these servers the ESP doesn’t require
any date/time setting (except the configuration of the Time Zone
and DST done using the [CONFIG] page).
The timezone is defined as a string like
CET-1CEST,M3.5.0,M10.5.0/3
that describes how the local time must be managed in terms of time
shift and DST (summer / winter time).
A complete list of timezone strings can be
found here :
https://github.com/nayarsystems/posix_tz_db/blob/master/zones.csv
An internal timekeeper has been included if no
time server is available, eg no available internet access.
This timekeeper starts from 01/01/1970
00:00:00 and counts the seconds since the power on of the
module.
If internet connection becomes available
later, the internal timekeeper will sync its time with the NTP
servers.
The time can be sync with the NTP time server
at any moment using the command
OPTION.NTPSYNC.
This time and date can be manually set using
the command SETTIME.
The Syntax is :
SETTIME year, month, day, hours, minutes,
seconds
Example
Set the date to 02 September 2017 at
13:58:12
SETTIME 17, 9, 2,
13, 58, 12
The time and date can also be
manually synchronised to computer using the "Time Sync" button in
the File Manager window of the computer utility ‘tool’ if it has
websocket connection.
WARNING:
In both cases of manual
setting, the time and date will default back to 1970 defaults at
next module restart, so will require setting again.
For more information about the
Time Zones and DST, please consult the following page
:
Time Zone and
DST
It is also possible to connect
an RTC (DS1307 or DS3231) to the module.
See the chapter
“RTC
Module”
for more details.
Unix Time functions
The following functions use the
“Unix Time Stamp” format :
DATEUNIX(date$),
TIMEUNIX(time$),
UNIXDATE$(value [,format]),
UNIXTIME$(value)
The “Unix Time Stamp” is a way
to track time as a running total of seconds.
This count starts at the Unix
Epoch on January 1st, 1970 at UTC.
Therefore, the unix time is
merely the number of seconds between a particular date and the Unix
Epoch.
In synthesys :
-
DATEUNIX("01/01/18")
returns the number
of seconds from 01/01/1970 to the specified date 01/01/2018
(1514764800)
-
TIMEUNIX("12:30:55")
returns the number
of second since midnight (45055)
-
UNIXDATE$("1532773308")
returns
28/07/18
-
UNIXTIME$(1532773308)
returns
10:21:48
FAT32
File System
Annex32 includes a
FATFS file system hosted on the flash memory chip.
It “emulates” a
disk file system enabling to save and load files in a transparent
way.
Depending on the
size of the flash chip, the following free space is available :
Flash Chip size
|
Free space available
|
4M
|
1MB
|
[8] 8M
|
5MB
|
16M
|
13MB
|
Annex32 can also
use an SD CARD connected as described in the chapter SD CARD
ADAPTER.
Both the internal
FATFS and the SD CARD utilise the FAT32 file system
This means that
there are no particular limitations in terms of filename length and
directories, compared to the SPIFFS file system limitations hosted
in the ESP8266.
Unlike normal
variables, filenames and folders are case sensitive.
Annex32 supports SD
CARDS up to 16GB.
Both the
internal FATFS and external SD CARD share the same command and
functions.
All the file
related functions share the same prefix FILE.
followed by the specific function.
FUNCTIONS / COMMANDS
|
DESCRIPTION
|
Ret = FILE.COPY(filename$, newfile$)
|
Copy the file filename$
into the file newfile$
Returns 1 in case of success or
0 if error
|
Ret = FILE.DELETE(filename$)
|
Delete the file specified by filename$
Returns 1 in case of success or
0 if error
|
Ret = FILE.EXISTS(filename$)
|
Returns 1 if filename$
exists, otherwise returns 0
|
Ret = FILE.RENAME(oldname$, newname$)
|
Rename the file oldname$
to newname$
Returns 1 in case of success or
0 if error
|
Ret = FILE.SIZE(filename$)
|
Returns the size of the file (in bytes) if the
file exist, otherwise returns -1
|
Ret = FILE.MKDIR(dirname$)
|
Create a directory specified by
dirname$
Returns 1 in case of success or
0 if error
|
Ret = FILE.RMDIR(dirname$)
|
Remote the directory specified by
dirname$
Returns 1 in case of success or
0 if error
|
Ret$ = FILE.DIR$(path$)
|
Will search for files and return the names of
entries found.
path$
represents the directory name.
path$ can
include wildcards characters as ‘*’,
‘.’ and
‘?’
The function will return the first entry
found.
To retrieve subsequent entries use the
function with no arguments. ie,
FILE.DIR$.
The return of an empty string indicates that
there are no more entries to retrieve.
|
Ret$ = FILE.READ$(filename$,
[line_num] | [start, length])
|
Returns the content of the file
filename$.
Specifying line_num,
only the corresponding line is read from the file.
If start
and length
options are specified, the file is read from the start
position for length
characters, otherwise the complete file is read in one go
The line number
starts from 1.
|
FILE.APPEND
filename$,
content$
|
Append the content of content$
to the file filename$.
If the file does not exist, it will be
created.
The file can be read back using the function
FILE.READ$(filename$)
File size is only limited by available disk
space (internal FFAT or external SD card)
|
FILE.SAVE
filename$,
content$
|
Save the content of content$
to the file filename$.
The file can be read back using the function
FILE.READ$(filename$)
File size is only limited by available disk
space (internal FFAT or external SD card)
|
FILE.WRITE
filename$,
content$
|
Same functionalities as the previous
command.
Implemented for homogeneity with other
commands
|
FILE.SAVE_IOBUFF
|
See the chapter I/O buffer for more
details
|
[9] FILE.WRITE_IOBUFF
|
See the chapter I/O buffer for more
details
|
[10] FILE.APPEND_IOBUFF
|
See the chapter I/O buffer for more
details
|
FILE.READ_IOBUFF
|
See the chapter I/O buffer for more
details
|
Examples:
List all the files
in the directory /html
d$
= FILE.DIR$("/html")
While D$
<> ""
wlog d$
d$
= FILE.DIR$
Wend
|
File operations
file.save
"/test.bas",
"The quick brown fox "
wlog
"exists",
file.exists("/test.bas")
wlog
"size",
file.size("/test.bas")
file.append
"/test.bas",
"jumps over the lazy dog"
wlog
"size",
file.size("/test.bas")
wlog
"copy",
file.copy("/test.bas",
"/AAA.bas")
wlog
"size",
file.size("/AAA.bas")
wlog
"rename",
file.rename("/AAA.bas",
"/BBB.bas")
wlog
"size",
file.size("/BBB.bas")
wlog
"size",
file.size("/AAA.bas")
wlog
"read",
file.read$("/test.bas")
wlog
"delete",
file.delete("/BBB.bas")
|
I/O
BUFFERS
The I/O BUFFER is a functionality that gives
the capability to hold and manage binary data.
In short, the I/O buffer is a block of RAM
memory that can be exchanged as a block or read and written byte
per byte. It overcomes the limitation of strings, which are
unable to include the character ASCII 0 (NUL).
It has a defined length and can be freely
dimensioned and cleared.
It can be used in the code using the
IOBUFF keyword, and Annex exposes 5 I/O buffers numbered
from 0 to 4.
The I/O buffers can have any size within the
limits of the free RAM memory available.
The main goal of this functionality is to
interface with all the functions that require exchanges using
binary data.
In the current implementation it can be used
with :
-
Files
-
Serial Ports
-
SPI
-
I2C
-
UDP
As it is essentially a block of memory,
the first command is
IOBUFF.DIM(buff_num,
size) that defines its
size.
buff_num
can span from 0 (first buffer) to 4 (last buffer)
size
can span from 0 to the maximum RAM memory available
Example:
IOBUFF.DIM(0,
1000) 'dimension the I/O buffer 0 with 1000
bytes
The I/O buffer can be filled with a given set
of data directly using the function
IOBUFF.DIM
Example:
IOBUFF.DIM(0,
10) = 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
IOBUFF.DIM(1,
5) =
&h12, &hAA, &h50, &O377,
&B10101010
As soon as the buffer is dimensioned, the
given amount of RAM is reserved for the buffer.
When not required anymore, it can be removed
with the command
IOBUFF.DESTROY(buff_num)
Example:
IOBUFF.DESTROY(0)
'remove the buffer releasing the memory
reserved
Note : The I/O buffers are automatically
removed each time the program is run.
It is possible to know the size of the buffer
using the function
IOBUFF.LEN(buff_num)
Example
Print
IOBUFF.LEN(buff_num)
'print the length of the
buffer
The I/O buffer can be read byte per byte using
the function
IOBUFF.READ(buff_num,
position)
position
can span from 0 (first byte) and the buffer length - 1 (last
byte)
Example:
Print
IOBUFF.READ(0,
4) 'print the byte 4 from the I/O buffer
0
A
= IOBUFF.READ(0, 7)
' read in the variable A the byte 7
from the I/O buffer 0
The I/O buffer can be written byte per byte
using the command
IOBUFF.WRITE(buff_num,
position, value)
position
can span from 0 (first byte) and the length - 1 (last byte)
value
can span from 0 to 255 (byte)
The I/O buffers communicate with the other
modules using the following syntax:
-
xxxx.READ_IOBUFF(buff_num)
Receive data in the
buffer buff_num
-
xxxx.WRITE_IOBUFF(buff_num,
start, size)
Transmit (send)
data from the buffer buff_num
starting from the position ‘start’
for ‘size’
bytes
-
xxxx.REPLY_IOBUFF(buff_num,
start, size)
Reply to the sender
data from the buffer buff_num
starting from the position ‘start’
for ‘size’
bytes
Where
xxxx can be :
UDP
SERIAL
SERIAL2
FILE
I2C
SPI
Detailed syntax :
UDP.READ_IOBUFF(buff_num)
SERIAL.READ_IOBUFF(buff_num)
SERIAL2.READ_IOBUFF(buff_num)
FILE.READ_IOBUFF(buff_num),
filename$ [, position, nb_of_bytes_to_read]
I2C.READ_IOBUFF(buff_num),
address, register, nb_of_bytes_to_read
SPI.READ_IOBUFF(buff_num),
nb_of_bytes_to_read
UDP.WRITE_IOBUFF(buff_num
[, start [, size]]), IP$,
port
SERIAL.WRITE_IOBUFF(buff_num
[, start [, size]])
SERIAL2.WRITE_IOBUFF(buff_num
[, start [, size]])
FILE.SAVE_IOBUFF(buff_num
[, start [, size]]),
filename$
FILE.WRITE_IOBUFF(buff_num
[, start [, size]]),
filename$
FILE.APPEND_IOBUFF(buff_num
[, start [, size]]),
filename$
I2C.WRITE_IOBUFF(buff_num
[, start [, size]]), address,
register
SPI.WRITE_IOBUFF(buff_num
[, start [, size]])
UDP.REPLY_IOBUFF(buff_num
[, start [, size]])
[,port]
SPI.REPLY_IOBUFF(buff_num
[, start [, size]]), (buff_num_reception)
The IOBUFFER can be used for sending or
receiving data.
Read Operations
When used for receiving data, the syntax is
always.READ_IOBUFF(buff_num).
When receiving data, it is not necessary to
dimension the buffer before as it will be automatically dimensioned
depending on the size of the data received. If the buffer was
already containing some data, these will be flushed and replaced by
the new data.
For example, the following command receives
all the data available from the serial port 2 in the buffer 3 :
SERIAL2.READ_IOBUFF(3)
This command receives the data coming from an
UDP connection in the buffer 1:
UDP.READ_IOBUFF(1)
Additionally some other arguments may be
required.
This command reads 512 bytes from the file
data.bin starting from the file position 123 in the buffer 0:
FILE.READ_IOBUFF(0),
“/data.bin”, 123, 512
This command reads 8 bytes from an I2C device
with address 63 from the register 19 in the buffer 4 :
I2C.READ_IOBUFF(4),
63, 19, 8
This command reads 32 bytes from the SPI bus
in the buffer 2 :
SPI.READ_IOBUFF(2),
32
Write Operations
When used for sending data, the syntax is
always
.WRITE_IOBUFF(buff_num
[, start [, size]])
When sending data, it is possible to send the
entire buffer or only a part of it.
Specifying the optional arguments start and
size it is possible to define the part of the buffer to be sent
otherwise, if omitted, the entire buffer will be transferred.
For example, the following command sends 10
bytes from the buffer 1 starting from the position 45 to the serial
port :
SERIAL.WRITE_IOBUFF(1,
45, 10)
This command sends the complete buffer 1 to
the serial port 2
SERIAL2.WRITE_IOBUFF(1)
This command sends 8 bytes from the buffer 2
starting from the position 128 to the SPI bus
SPI.WRITE_IOBUFF(2,
128, 8)
Additionally some other arguments may be
required.
This command sends 12 bytes from the buffer 1
starting from the position 64 to the UDP on the address
192.168.1.89 and port 8080 :
UDP.WRITE_IOBUFF(2,
128, 8), “192.168.1.89”,
8080
This command sends the entire buffer 2 on the
same UDP device :
UDP.WRITE_IOBUFF(2),
“192.168.1.89”, 8080
This command writes the buffer 1 to the file
data.bin
FILE.WRITE_IOBUFF(1),
“data.bin”
This command has the same result and is
provided for compatibility with the existing syntax
FILE.SAVE_IOBUFF(1),
“data.bin”
This command appends 36 bytes from the buffer
0 starting from the position 25 to data.bin
FILE.APPEND_IOBUFF(0,
25, 36), “data.bin”
This command sends the buffer 2 to the I2C
device with address 63 and register 19 :
I2C.WRITE_IOBUFF(2),
63, 19
The same operation but sending only 4 bytes
starting from position 0:
I2C.WRITE_IOBUFF(2,
0, 4), 63, 19
Special operations
The syntax
.REPLY_IOBUFF(buff_num
[, start [, size]])
defines some kind of special operations.
For example, this command sends the buffer 0
back to the UDP message sender:
UDP.REPLY_IOBUFF(0)
This is the equivalent of
UDP.REPLY message$
but with the IOBUFFER
Optionally it is also possible specify part of
the buffer and the destination port (eg: 5001) as below:
UDP.REPLY_IOBUFF(0,
2, 6), 5001
When used with the SPI bus, it transmits and
receives at the same time.
As this operation requires 2 buffers, both
must be specified.
For example, this command sends the buffer 0
and receive into the buffer 2:
SPI.REPLY_IOBUFF(0),
(2)
This command sends 4 bytes from the buffer 0
starting from the position 89 and receive 4 bytes in the buffer
3:
SPI.REPLY_IOBUFF(0,
89, 4), (3)
Advanced operations
Several other functions / commands are
available for advanced users.
These enable bit, string and hex
operations
conversion from hex
string :
IObuff.FromHex(buff_num,
var$ [, pos])
var$ must
contain a hex string in the form of "aabbcc1235"
pos is the
position where the HEX must be included in the buffer (0 by
default)
A part of the string
can be converted in combination with mid$
conversion from
string:
IObuff.FromString(buff_num,
var$ [, pos])
var$ must
contain a text string in the form of "This is a text string"
pos is the
position where the HEX must be included in the buffer (0 by
default)
A part of the string
can be converted in combination with mid$
conversion to hex
string:
A$
= IObuff.ToHex$(buff_num, [, start [,
size]])
returns an hex string
in the form of "aabbcc1235"
start and
size are optional and define the start and length (like MID$
but the 1st byte is 0)
conversion to
string:
A$
= IObuff.ToString$(buff_num, [, start [,
size]])
returns an hex string
in the form of "This is a string"
start and
size are optional and define the start and length (like MID$
but the 1st byte is 0)
Bit operations
a
= IObuff.bit(buff_num, position, bit)
returns the value of
the bit of the byte at the position of the
buff_num
returns 0 or 1
IObuff.setbit(buff_num,
position, bit)
set the bit of
the byte at the position of the buff_num
IObuff.clearbit(buff_num,
position, bit)
clear the bit
of the byte at the position of the buff_num
IObuff.togglebit(buff_num,
position, bit)
toggle the bit
of the byte at the position of the buff_num
Buffer copy
IObuff.copy(dest_buff_num
[,pos]) , (source_buff_num, [,
start [, size]])
Copy the from
source_buff to dest_buff
pos is the
position where the source must be copied in the source (0 by
default)
start and
size define what must be copied (have the same meaning as in
.WRITE_IOBUFF)
Code examples :
UDP - use the remote controller APP for IOS
devices (iphone and Ipad)
' I/O buffers example using the RCWController
' available in the IOS app store.
' It uses by default the port 10000
' The APP sends a block of 10 bytes that
' will be printed in the console on the same line
udp.begin 10000
' define the place where jump on message reception
onudp received
wait
received:
' read the incoming data in the buffer 0
udp.read_iobuff(0)
size
= iobuff.len(0)
print
"received "; size; "
bytes"
for z
= 0 to 9
' read and print 1 byte at the time on
the same line
print iobuff.read(0, z),
next z
Print
' print an empty line
return
|
File read and transfer to the serial port
by blocks
' I/O BUFFERS example using files
' read a file in blocks of 512 characters
' and send them to the serial port (print)
fileName$
= "/data8.txt"
block_size
= 512 '
size of the block to be read
file_size
= file.size(fileName$)
print
"File size "; file_size
print file_size
for z
= 0 to file_size - 1 step
block_size
file.read_iobuff(0), fileName$, z, block_size
' send the block on the serial port
(print)
serial.write_iobuff(0)
next
|
Serial port data logger
' I/O BUFFERS example to create a serial data logger
' receive bytes from the serial port and
' write them into the file /mylog.txt
' all the characters will be recorded
' including the ASCII 0 (NUL)
filename$
= "/mylog.txt"
' define the place where jump on message reception
onserial received
wait
received:
' waits for 10 millisec giving time to receive all the
data
pause 10
' read the incoming data in the buffer 0
serial.read_iobuff(0)
size
= iobuff.len(0)
print
"received "; size; "
bytes"
' appends the received data to the file
file.append_iobuff(0),
filename$
return
|
Note:
Following the
implementation of the I/O Buffers, the following functions /
commands have been removed :
-
SPI.HEX$
-
I2C.WRITEREGARRAY
-
I2C.READREGARRAY
WIRING
This diagram
shows pin mapping for the popular ESP32 DEV Board
module.
(*) pins GPIO6 to
GPIO11 are not available.
Annex 32, as it
supports by default the M5stack wiring, assumes the following pins
already allocated/dedicated
PIN
|
FUNCTION
|
DESCRIPTION
|
32
|
PWM
BL TFT
|
Backlight TFT display
|
33
|
RST
TFT
|
RST
pin TFT
|
27
|
D/C
TFT
|
D/C
pin TFT
|
14
|
CS
TFT
|
CS
pin TFT
|
23
|
SPI
MOSI
|
SPI
MOSI pin (shared with SD and TFT)
|
19
|
SPI
MISO
|
SPI
MISO pin (shared with SD and TFT)
|
18
|
SPI
SCK
|
SPI
CLOCK pin (shared with SD and TFT)
|
4
|
CS
SDCARD
|
CS
pin SDCARD
|
0
|
CS
TFT TOUCH
|
CS
pin Touchscreen (from the TFT)
|
|
|
|
3
|
RX0
|
Serial Port RX pin
|
1
|
TX0
|
Serial Port TX pin
|
|
|
|
25
|
SPEAKER
|
Speaker or mono audio output
|
21
|
SDA
I2C
|
I2C
SDA pin
|
22
|
SCL
I2C
|
I2C
SCL pin
|
|
|
|
2
|
I2S
DATA
|
Audio
DAC I2S DATA pin
|
5
|
I2S
BCLK
|
Audio
DAC I2S BCLK pin
|
26
|
I2S
LRCK
|
Audio
DAC I2S LRCK pin
|
16
|
PSRAM
|
Optional PSRAM
|
17
|
PSRAM
|
Optional PSRAM
|
DIGITAL
I/O
Pin numbers
correspond directly to the ESP32 GPIO pin numbering.
The function of the
pin (input / output) must be defined before using the function
PIN.MODE as below :
To define the pin 5
as input :
PIN.MODE 15,
INPUT
To define the pin 4
as input with a pullup:
PIN.MODE 4,
INPUT, PULLUP
To define the pin 4
as input with a pulldown:
PIN.MODE 4,
INPUT, PULLDOWN
To define the pin 2
as output
PIN.MODE 2,
OUTPUT
To define the pin 2
as output open collector
PIN.MODE 2,
OUTPUT, 1
Although pin numbers can be from 0 to 39, gpio pins
6 to 11 should not be used because they are connected to
flash memory chips on most modules. Trying to use these pins as IOs
will likely cause the program to crash.
Pins 34 to 39 are
INPUT only and cannot be configured as
PULLUP or
PULLDOWN.
Pins 0
to 33 can be
INPUT,
OUTPUT,
INPUT, PULLUP or
INPUT, PULLDOWN.
Pins may also serve
other functions, like Serial, I2C, SPI.
These functions are
normally activated by the corresponding library.
The value from a
pîn can be read as shown below :
A
= PIN(5)‘ read from GPIO5 pin
The pin value can
be set as below
PIN(2)=
0
‘
set 0 on the GPIO2
pin
The pin value (0 or
1) can also be easily toggled by subtracting it from 1 (because
1-0=1 and 1-1=0), eg:
PIN(2)=
1 -
PIN(2)‘
toggles the value of GPIO2
pin
Note:
If the module is equipped with PSRAM, the gpio pins
16 and 17 are reserved and must not be used.
PIN INTERRUPTS
The
INTERRUPT command permits to trigger an event when the
signal on an input pin changes.
The interrupt is
triggered BOTH when the signal goes from LOW to HIGH and HIGH to
LOW.
Therefore a
momentary pulse actually generates 2 interrupts which need testing
for Hi or Lo as appropriate.
Example:
pin.mode 12,
input ' set pin 12 as input
interrupt 12, change_input
' set interrupt on pin 12
wait
change_input:
if pin(12)
= 0 then return ' if the pin is low, returns back
print "The pin changed to HIGH"
Return
|
Analog inputs
Annex32 has 8 ADC
pins with 12 bits resolution which are available to users.
The function
ADC(pin)
can be used to read voltage on the pins defined in the table
below.
GPIO Pins Available as
Analog Input
|
32
|
33
|
34
|
35
|
36
|
37
|
38
|
39
|
To read the voltage applied at the pin, the
function ADC can be used as below :
print
ADC(39)' read voltage
from the pin 39
The voltage range is
0 ... 3.3V and the corresponding range returned by the function is
0 … 4095.
NOTE: When using the
function
ADC,the pin is automatically configured as an Analog
Input
TOUCH inputs
Annex32
supports an additional ESP32 feature, the capacitive
touch.
With this
feature, it is possible to activate inputs with your fingers with
just one wire attached to the pin.
The
function
PIN.TOUCH(pin)
can be used to read the touch
value on the pins defined in the table below.
GPIO Pins Available as Touch
Input
|
0
|
2
|
4
|
12
|
13
|
14
|
15
|
27
|
32
|
33
|
The
function
PIN.TOUCH(pin)
returns a value that drops as soon
as the pin is touched.
Normal values
are around 70 when not touched and lower than 20 when
touched.
'Pin Touch
example
'Place a
wire on pin 13 and look how the value changes when touching
it
while
1
print pin.touch(13)
pause 100
wend
end
|
Hardware interfaces:
The ESP32 contains several H/W interfaces that
can be controlled by Annex32 WI-Fi using specific commands and
functions.
PWM
This functionality permits to control the
output duty cycle of any pin, acting like an analog output.
There are 16 channels available where each
channel can be connected to any output pin.
To use it, the function must first be
configured using the command
PWM.SETUP and then the value can be set using the
command
PWM.OUT.
The frequency and the
resolution can be defined individually for each channel.
The resolution can be from
1 to 15 bits.
The maximal frequency is
80000000 / 2^resolution
This table resumes the
maximal frequency available in function of the resolutions and the
associated range:
RESOLUTION (BITS)
|
MAX FREQUENCY
|
VALUE RANGE
|
1
|
40000000
|
0 ... 1
|
2
|
20000000
|
0 ... 3
|
3
|
10000000
|
0 ... 7
|
4
|
5000000
|
0 .. 15
|
5
|
2500000
|
0 .. 31
|
6
|
1250000
|
0 … 63
|
7
|
625000
|
0 … 127
|
8
|
312500
|
0 … 255
|
9
|
156250
|
0 … 511
|
10
|
78125
|
0 … 1023
|
11
|
39063
|
0 … 2047
|
12
|
19531
|
0 … 4095
|
13
|
9766
|
0 … 8191
|
14
|
4883
|
0 … 16383
|
15
|
2441
|
0 … 32767
|
All the output pins can be
used for the PWM (the pins from GPIO0 to GPIO33).
As there are 16 channels,
up to 16 individual output pins can be used.
If using the M5Stack, the
channels 0 and 7 are already reserved and attached to the pins 25
and 32.
In this case the channels
0 and 7 must be avoided.
To setup an output pin as
a PWM output the following command must be used :
PWM.SETUP
pin,
channel, default_value, [,frequency]
[,resolution]
For example, to define a
PWM output at 5KHz with 12 bits of resolution on the pin GPIO5 the
command is :
PWM.SETUP 5, 1,
2048, 5000, 12 ‘ pin 5, channel 1, output value at 2048
(50%), 5KHz, 12 bits
As the resolution is set
at 12 bits, the range will be from 0 to 4095 (hence 2048 is
50%).
To define a PWM output at
10KHz with 8 bits on the pin GPIO22, the command is :
PWM.SETUP 22, 2,
128 ‘ pin 22, channel 2, value 128 ( 50%) , freq
10 KHz (default), resolution 8 bits (default)
As soon as the command
PWM.SETUP is done, the PWM output can simply be changed with the
command :
PWM.OUT
channel, value
For example, the
command
PWM.OUT 1,
1000
Set the channel 1
(associated with the pin 5 in the previous command) at 1000.
And the command
PWM.OUT 2, 10
Set the channel 2 (associated with the pin 22
in the previous command) at 10
To disconnect the pin from the PWM output the
command is :
PWM.SETUP pin,
OFF.
For example the command
PWM.SETUP 5,
OFF
Disconnect the pin 5 fro the PWM
NOTE for the
M5stack:
The channel 0 is
dedicated to the internal speaker (pin 25)
The channel 7 is
dedicated to the TFT backlight (pin 32)
SERVO
This functionality exposes the ability to
control RC (hobby) servo motors.
There are no special commands dedicated as the
servo can simply be used by setting a PWM pin with a 50Hz
frequency.
For example, the following command :
PWM.SETUP 17, 1,
150, 50, 12
Defines the pin 17 with the pwm channel 1 with
a default value of 150 (frequency at 50 Hz and resolution at 12
bits).
The output can then be set with the
command
PWM.OUT 1,
307‘ channel 1 set at 90°
A typical servo motor expects to be updated
every 20 ms with a pulse between 1 ms and 2 ms, or in other words,
between a 5 and 10% duty cycle on a 50 Hz waveform. With a 1.5 ms
pulse, the servo motor will be at the natural 90 degree position.
With a 1 ms pulse, the servo will be at the 0 degree position, and
with a 2 ms pulse, the servo will be at 180 degrees. You can obtain
the full range of motion by updating the servo with any value in
between.
Using a 12 bits resolution (max value = 4095
for 20 msec pulse (1/50 Hz)), the theoretical values should be
:
0° -> 1 msec -> 1/20 * 4096 =
205
90° -> 1.5 msec -> 1.5/20 * 4096 =
307
180° -> 2 msec -> 2/20 * 4096 =
409
I2S BUS
I²S (Inter-IC Sound), is an electrical serial
bus interface standard used for connecting digital audio devices
together. It is used to communicate PCM audio data between
integrated circuits in an electronic device.
The I²S bus separates clock and serial data
signals, resulting in a lower jitter than is typical of
communications systems that recover the clock from the data
stream.
Despite the name similarity, I²S is
unrelated to the bidirectional I²C (I2C) bus.
The bus consists of three lines:
Bit clock line
-
Typically called "bit clock (BCLK)". PIN GPIO5
Word clock line
-
Typically called "left-right clock (LRCLK)" or “Word Select
(WSEL)”. PIN GPIO26
Data line
-
Typically called "serial data (SD)". Can also be called (SDIN,
SDOUT or DATA). PIN GPIO2
The typical use of the I2S is to connect an
external DAC to provide a High Quality stereo sound output.
Using the PLAY.xxx commands, it will be
possible to play MP3 and WAV files directly from the disk.
Any generic I2S DAC can be used.
Annex32 has been successfully tested with the
PC5102A and the UDA1334A
UDA1334A I2S DAC
PCM5102A I2S DAC
SPEAKER OUTPUT
The M5stack contains an internal speaker
connected, via an audio amplifier, to the pin GPIO25.
This permits the generation of audio signals
using the internal 8 bits DAC.
Using the PLAY.xxx commands, it will be
possible to play MP3 and WAV files directly from the disk.
It is possible to connect an earphone directly
on the output between the pin GPIO25 and the ground but the best is
to connect a little audio amplifier.
NOTE: it is recommended to put a capacitor
( ~100nF) between the GPIO25 and the audio amplifier in order to
remove the DC component from the audio signal.
I2C BUS
The I²C bus allows the module to connect to
I²C devices.
I²C uses only two bidirectional open-drain
lines, Serial Data Line (SDA) and Serial Clock Line (SCL), pulled
up with resistors (typically 4.7K to 10K).
The I²C has a 7 bit address space permitting,
theoretically, to connect up to 126 I/O devices.
The maximal number of nodes is limited by the
address space and also by the total bus capacitance of 400 pF,
which restricts practical communication distances to a few meters.
The relatively high impedance and low noise immunity requires a
common ground potential, which again restricts practical use to
communication within the same PC board or small system of
boards.
The current implementation is master mode @
100Khz by default.
The SDA and SCL pins can be freely defined
using the command
I2C.SETUP sda_pin,
scl_pin.
For example, to define pins
21(SDA) and 22(SCL) the command is :
I2C.SETUP 21,
22
It is important to provide correct pullup
resistors on these lines; values between 4.7K to 10K should be
appropriate.
The commands available are :
I2C.BEGIN,
I2C.END, I2C.REQFROM, I2C.SETUP, I2C.WRITE
The functions available are :
I2C.LEN,
I2C.READ, I2C.END
There are also other advanced
functions / commands to simplify exchanges with the i2c
bus.
The advanced commands available
are :
I2C.READREGARRAY,
I2C.WRITEREGBYTE,I2C.WRITEREGARRAY
The advanced functions available are :
I2C.READREGBYTE[11] [12]
The I2C bus can also
be used with the IO Buffers ( look at the dedicated chapter)
As all the devices can have a "not well"
determined address, please find here a little i2c scanner program
which returns the address of all the devices found connected to the
bus
'I2C Address
Scanner
'print in the
console the address of the devices found
I2C.SETUP
21, 22
' set I2C port on pins 21 and
22
for
i
= 0 to 120
i2c.begin i
if i2c.end = 0
then
print "found "; i , hex$(i)
pause 10
end if
next
i
end
|
PCF8574 Module
This is an example of connection of a module
with PCF8574 bought on Ebay at less than 2€
This drawing shows
how this module must be connected to the ESP32.
It provides 8
digital inputs or outputs.
This is an example of code that "drives" this
module:
I2C.SETUP 21,
22 ' set I2C
port on pins 21 and 22
device_address = 32 'set to
module i2c address
'Write from 0
to 255 on the module
'Each pin
will blink at different frequency
For
i
= 0 to 255
PCF8574_write
i
Next
i
'Read all the
inputs
'The result
is printed into the serial console
' put all the
inputs at pullup state
PCF8574_write
255
r
= 0
For
i
= 0 to 1000
PCF8574_read r
Print r
Next
i
End
sub
PCF8574_write(x)
i2c.begin
device_address
i2c.write x
i2c.end
end
sub
sub
PCF8574_read(x)
i2c.begin
device_address
i2c.reqfrom device_address,
1
x
= i2c.read
i2c.end
end
sub
|
ADS1115 Module
This is another example of connection of a
module with ADS1115 bought on Ebay at less than 2€.
This is a 16 Bit ADC 4 channel Module with
Programmable Gain Amplifier.
Because the module already contains two 10K
I2C pullups, no external resistors are required
As this device is quite simple to interface,
it can be directly driven using a “driver” written in basic.
' ADS1115
Driver for Annex
' datasheet
http://www.ti.com/lit/ds/symlink/ads1115.pdf
' ADS1115
Registers
ADS1115_ADDRESS
= &h48
ADS1115_CONV_REG
= 0 : ADS1115_CONF_REG = 1
ADS1115_HI_T_REG
= 2 : ADS1115_LO_T_REG = 3
i2c.setup
21, 22
' set I2C bus
' Set the
ADS1115 with :
'
AINp = AIN0 and AINn = AIN1
'
FSR = ±4.096 V
'
16 SPS
ADS1115_setup 0, 1,
1
' scale in
volt
scale = 4.096 /
32768
v = 0
for
i
= 0 to 100000
ADS1115_read v
' read from the
module
print v *
scale
next
i
end
'---------------------------------------------------------
' INPUT
MULTIPLEX :
' AINp is
the input positive
' AINn is
the input negative
'0 : AINp =
AIN0 and AINn = AIN1
'1 : AINp =
AIN0 and AINn = AIN3
'2 : AINp =
AIN1 and AINn = AIN3
'3 : AINp =
AIN2 and AINn = AIN3
'4 : AINp =
AIN0 and AINn = GND
'5 : AINp =
AIN1 and AINn = GND
'6 : AINp =
AIN2 and AINn = GND
'7 : AINp =
AIN3 and AINn = GND
'GAIN
'0 : FSR =
±6.144 V
'1 : FSR =
±4.096 V
'2 : FSR =
±2.048 V
'3 : FSR =
±1.024 V
'4 : FSR =
±0.512 V
'5 : FSR =
±0.256 V
'6 : FSR =
±0.256 V
'7 : FSR =
±0.256 V
'DATA
RATE
'0 : 8
SPS
'1 : 16
SPS
'2 : 32
SPS
'3 : 64
SPS
'4 : 128
SPS
'5 : 250
SPS
'6 : 475
SPS
'7 : 860
SPS
sub
ADS1115_setup(inp_mux, gain, rate)
local conf
conf = (inp_mux
<< 12) or
(gain << 9)
or (rate << 5)
or 3 ' +
disable comp
'use the IO Buffer 0 for
writing
iobuff.dim(0,2)
= (conf and
&hff00) >> 8
, conf and &hff
i2c.write_iobuff(0),
ADS1115_ADDRESS, ADS1115_CONF_REG
end
sub
sub
ADS1115_read(ret)
'use the IO Buffer 0 for
reading
i2c.read_iobuff(0),
ADS1115_ADDRESS, ADS1115_CONV_REG, 2
ret = iobuff.read(0, 0)
<< 8 + iobuff.read(0, 1)
if ret >
32768 then ret = ret -
65536
end
sub
|
MCP23017 Module
This is another example for connecting an I2C
module, an MCP20S17 bought on Ebay at less than 2€.
This module provides 16 GPIO pins that can be
used as digital inputs or outputs.
Because the module already contains two 10K
I2C pullups, no external resistors are required
As this device is quite simple to interface,
it can be directly driven using a “driver” written in basic.
' MCP23017
Driver for Annex
' datasheet
http://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf
I2C.SETUP
21, 22
' set I2C port on pins 21 and
22
device_address
= 32 'set to module i2c address
'MCP23017
internal registers
IODIRA
= 0 : IODIRB
= 1 : IPOLA = 2 : IPOLB = 3
GPINTENA = 4 : GPINTENB = 5 : DEFVALA =
6 : DEFVALB = 7
INTCONA = 8 : INTCONB = 9 : IOCONA = 10 : IOCONB = 11
GPPUA
= 12 : GPPUB
= 13 : INTFA
= 14 : INTFB
= 15
INTCAPA = 16 : INTCAPB =
17 : GPIOA = 18 :
GPIOB =
19
OLATA
= 20 : OLATB
= 21
i2C.WriteRegByte
device_address, IOCONA,
&h08 ' init MCP23S17 with bit HAEN
i2C.WriteRegByte
device_address, IODIRA,
&hFF ' all PORT A pins as input
i2C.WriteRegByte
device_address,
GPPUA, &hff ' set PORT A pullup on all
pins
i2C.WriteRegByte
device_address, IODIRB,
&h00 ' all PORT B pins as output
r = 0
for
z
= 0 to 255
I2C.WriteRegByte device_address, GPIOB, z
' pulse all GPIOB
pins
r = i2C.ReadRegByte(device_address, GPIOA) ' read
all GPIOA pins
print r
pause 100
next
z
|
SPI BUS
The SPI bus allows
the module to connect to SPI devices.
The Serial
Peripheral Interface bus (SPI) is a synchronous serial
communication interface used for short distance communication
between devices.
SPI devices
communicate in full duplex mode using a master-slave architecture
where the ESP32 is the master. The ESP32 generates the frame for
reading and writing.
Multiple slave
devices are supported through selection with individual chip select
(CS) lines.
The SPI bus utilise four
logic signals:
SIGNAL
|
DESCRIPTION
|
I/O
PIN
|
SCLK
|
Serial
Clock (output from the ESP32)
|
GPIO18
|
MISO
|
Master
Input Slave Output (data input to the ESP32)
|
GPIO19
|
MOSI
|
Master
Output Slave Input (data output from the ESP32)
|
GPIO23
|
CS
|
Chip
Select (often active low, output from the ESP32)
|
Any
output pin, controlled automatically
|
CS pin
As many devices can
be connected in parallel, sharing the same SCLK, MISO and MOSI
signals, each device is controlled individually using an individual
CS signal.
As Annex32
implements multitasking, in order to warrant that the CS signal is
generated in phase with the data to be transferred, the CS pin is
managed automatically.
The command
SPI.SETCSPIN pin [,
polarity] permits the pin associated with the device to
be controlled. Additionally, it permits to define the
polarity as 0 = active low (default) and 1 = active high.
SPI
Mode: Polarity and Clock Phase
The SPI
interface defines no protocol for data exchange, limiting overhead
and allowing for high speed data streaming. Clock polarity (CPOL)
and clock phase (CPHA) can be specified as ‘0’ or ‘1’ to form four
unique modes to provide flexibility in communication between master
and slave as shown below :
If CPOL
and CPHA are both ‘0’ (defined as Mode 0) data is sampled at the
leading rising edge of the clock. Mode 0 is by far the most
common mode for SPI bus slave communication.
If CPOL
is ‘1’ and CPHA is ‘0’ (Mode 2), data is sampled at the leading
falling edge of the clock. Likewise, CPOL = ‘0’ and CPHA = ‘1’
(Mode 1) results in data sampled on the trailing falling edge and
CPOL = ‘1’ with CPHA = ‘1’ (Mode 3) results in data sampled on the
trailing rising edge.
The
table below summarizes the available modes.
Mode
|
CPOL
|
CPHA
|
0
|
0
|
0
|
1
|
0
|
1
|
2
|
1
|
0
|
3
|
1
|
1
|
The data can also
be sent MSB first or LSB first.
This is defined as
bit order and is MSB first by default
Even if the chip is
able to achieve 80Mhz, the maximum realistic SPI speed is
40Mhz.
The commands available are :
SPI.SETUP speed
[,data_mode [, bit_order]]
SPI.CSPIN pin [,
polarity]
[13] The functions
available are :
ret =
SPI.BYTE(byte)
a$ =
SPI.STRING$(data$,
len)
a$ =
SPI.HEX$(datahex$,
len)
As said
previously, because the ESP32 uses multitasking, it is
impossible to warrant the exclusive use of the SPI bus during the
execution of the script (it could be used by the SD card or the
TFT, for example).
For this reason, the
CS pin is managed internally by Annex directly by the SPI
functions.
This is defined with
the command
SPI.CSPIN pin [,
polarity]
The optional
parameter polarity
defines if the CS signal must be active low (0 = default) or active
high (1).
This command will set
the pin automatically as output.
The SPI bus can also
be used with the IO Buffers ( look at the dedicated chapter)
Look at the examples
below for more details:
74HC595 Module
This is an example of connection of a module
with 74HC595 bought on Ebay at less than 2€
This drawing shows
how this module must be connected to the ESP8266.
It provides 8
digital outputs.
This is an example
of code that "drives" this module:
'Write from 0
to 255 on the module
'Each pin
will blink at different frequency
spi.setup
100000
' set the SPI port at
100KHz
SPI.CSPIN 15,
1 ' defines the pin 15 as CS active
high
for
i
= 0 to 255
r
= spi.byte(i)
next
i
end
|
MCP23S17 Module
This is another example for connecting an SPI
module, an MCP23S17 bought on Ebay at less than 2€.
This module provides 16 GPIO pins that can be
used as digital inputs or outputs.
As this device is quite simple to interface,
it can be directly driven using a “driver” written in basic.
This is an example using the SPI pins and the
GPIO15 as CS signal
' MCP23S17 Driver for Annex
' datasheet
http://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf
spi.setup 1000000
'MCP23S17 SPI address
MCP23S17_ADDR
= &h40 '
assumes A2, A1, A0 to GND
'MCP23S17 internal registers
IODIRA
= 0 : IODIRB
= 1 : IPOLA = 2 : IPOLB = 3
GPINTENA
= 4 : GPINTENB = 5 : DEFVALA =
6 : DEFVALB = 7
INTCONA
= 8 : INTCONB
= 9 : IOCONA = 10 : IOCONB = 11
GPPUA
= 12 : GPPUB
= 13 : INTFA
= 14 : INTFB
= 15
INTCAPA
= 16 : INTCAPB = 17 : GPIOA = 18 : GPIOB = 19
OLATA
= 20 : OLATB
= 21
MCP23S17_WRITE
IOCONA, &h08 ' init MCP23S17 with bit HAEN
MCP23S17_WRITE
IODIRA, &h00 ' all PORT A pins as output
MCP23S17_WRITE
IODIRB, &hff ' all PORT B pins as input
MCP23S17_WRITE
GPPUB , &hff ' all PORT B pins as pullup
v
= 0
for i
= 0 to 255
for z
= 0 to 255
MCP23S17_WRITE GPIOA, z ' pulse all
GPIOA pins
MCP23S17_READ GPIOB, v '
read all GPIOB pins
print v
next z
next i
End
' function for read / write the MCP23S17
sub MCP23S17_WRITE(register,
value)
SPI.CSPIN
15
a
= SPI.byte(MCP23S17_ADDR)
a
= SPI.byte(register)
a
= SPI.byte(value)
end
sub
sub
MCP23S17_READ(register, value)
local a
SPI.CSPIN 15
a = SPI.byte(MCP23S17_ADDR or 1)
a = SPI.byte(register)
value = SPI.byte(0)
end
sub
|
This functionality exposes two
counters that permit to count pulses from any input pin.
Additionally, each counter can
also return the time occurred between consecutive pulses (period);
this is useful as this will permit to determine the frequency of
low frequency signals simply taking its reciprocal
(f = 1 / period).
These counters are not based on
H/W but are managed using processor interrupts, so the input
frequency should be limited to around 10 Khz.
It is possible to define when the
pulse is counted (on Rising Edge, on Falling Edge, on
Change).
The “on Change” is particularly
interesting when associated with low frequency measurement as it
will permit to double the number of pulses.
Before using the counters, the
input pin must be set as INPUT using the command
PIN.MODE.
To start to use the counters, the
following command is available:
COUNTER.SETUP cnt, pin
[,mode]
where:
‘cnt’ defines which counter (1 or 2)
‘pin’ defines the input pin (can be any valid
pin except GPIO16)
‘mode’ can be 1 (rising edge), 2 (falling
edge) or 3 (change). If not specified, the mode change is
enabled.
Example:
PIN.MODE 12,INPUT
‘defines the pin GPIO12 as INPUT
COUNTER.SETUP 1, 12,
1 ‘ Counter 1 using pin GPIO12, count on Rising
Edge
The pulses counted can be read
using the function
COUNTER.COUNT(cnt).
The period between 2 consecutive
pulses can be read using the function
COUNTER.PERIOD(cnt).
Example:
print
COUNTER.COUNT(1)
‘print the pulses counted from the counter 1
print
COUNTER.PERIOD(1)
‘print the period
from the counter 1
FInally the counters can be reset
with the command
COUNTER.RESET cnt
Example:
COUNTER.RESET 1
‘ reset the counter 1
A proportional–integral–derivative controller
(PID controller. or three-term controller) is a control loop
feedback mechanism widely used in industrial control systems and a
variety of other applications requiring continuously modulated
control. (ref wikipedia)
A PID controller continuously calculates an
error value e(t) as the difference between a desired setpoint (SP)
and a measured process variable (PV) and applies a correction based
on proportional, integral, and derivative terms (denoted P, I, and
D respectively), hence the name.
In practical terms it automatically applies
accurate and responsive correction to a control function.
An everyday example is the cruise control on a
car, where ascending a hill would lower speed if only constant
engine power is applied. The controller's PID algorithm restores
the measured speed to the desired speed with minimal delay and
overshoot, by increasing the power output of the engine.
Annex implements 4 PID controllers that can be
used simultaneously for any application.
The commands are :
PIDx.INIT Kp, Ki,
Kd
PIDx.SETMODE mode
PIDx.LIMITS min,
max
PIDx.PERIOD msec
PIDx.PARAMS Kp, Ki,
Kd
The main function is:
Pid_Out
= PIDx.COMPUTE(CURR_VALUE, TARGET_VALUE)
PIDx can bePID1,
PID2, PID3 or
PID4.
The first step is to initialise the PID
controller.
This can be done with the command
PIDx.INIT Kp, Ki,
Kd :
Example:
PID1.INIT 50, 80,
1 'initialise the controller with Kp = 50, Ki = 80 and
Kd = 1
Optionally the output limits can be set using
the command
PIDx.LIMITS min,
max.
If not defined the output is limited between 0
and 255
Example:
PID1.LIMITS 0,
1023 ' limits the output between 0 and 1023
Then the sampling period can be defined using
the command
PIDx.PERIOD msec
If not defined the period is set at 100
msec
Example:
PIDx.PERIOD 50
' define the period at 50 msec
Finally the main function
output =
PIDx.COMPUTE(input,
setpoint)
Example:
Pid_Out
=
PID1.COMPUTE(CURR_VALUE,
TARGET_VALUE)
This function must be called regularly in a
loop; the best is to call it using a timer.
The command
PIDx.SETMODE mode
can be used to put the loop in manual with
PIDx.SETMODE 0.
In this case the PID loop will be stopped and
the output value will be frozen.
To restore the auto mode (default), the
command is
PIDx.SETMODE 1.
At any moment the PID parameters can be
changed using the command
PIDx.PARAMS Kp, Ki,
Kd :
Example:
PID1.PARAMS 30, 80,
10 ' modify the PID parameters with Kp = 30, Ki = 80 and
Kd = 10
The following example shows how to control the
speed of a 3-wire 12V PC fan.
The PID utilises the counter to determine the
fans speed controlling it using the PWM.
A little circuit is required to drive the
positive side of the FAN.[17]
SOUND PLAYER
Annex provides the functionality to play WAV
and MP3 sound directly from disk (FATFS or SD card).
The mp3 streaming from the web is also
supported permitting to play Web Radios.
As the ESP-32 is equipped with a dual core
CPU, this activity is done in parallel and does not impact the
overall performance of Annex-32.
The sound output can be sent to the internal
speaker (in particular for the m5stack) or to an external I2S
DAC.
Look at the previous chapters for more details
on the sound output.
To play sounds, the command available is
PLAY.xxx
Before using this command, the sound output
must be set as below :
PLAY.SETUP dest
[,buffer]
If ‘dest’ is 0 is the output will be sent to
the internal speaker (mono)
If ‘dest’ is 1 is the output will be sent to
the external DAC (stereo)
The optional argument ’buffer’ defines the
size of the memory block allocated as an output buffer.
Its value is 8 by default and can be increased
up to 64.
Increasing the size of the buffer will permit
to reduce some glitches that may occur in case of strong WiFi
activity.
If the command
PLAY.SETUP is run without arguments, the sound is sent
by default to the internal speaker.
To play mp3 files, the command is :
PLAY.MP3 mp3file$
Example
PLAY.MP3
"/mp3/MyMusic.mp3"
To play wav files, the command is:
PLAY.WAV wavfile$
Example
PLAY.WAV
"/wav/MySound.wav"
The position (the time) of the sound played
can be controlled using the command
PLAY.SEEK using a value from 0 (beginning) to 100
(end).
Example
PLAY.SEEK 50
position the sound at the middle of its length (50%)
PLAY.SEEK 0
rewind the sound
The function
PLAY.POS returns the current position of the file from 0
(beginning) to 100 (end)
Example:
print
PLAY.POS
It is also possible to play mp3 streaming web
radios with the command
PLAY.STREAM streaming_url$
[,buffer]
Example:
PLAY.STREAM"http://91.121.159.124:8000/eko-des-garrigues-128k.mp3"
To avoid glitches, the stream is buffered
locally using a buffer of 20 Kbytes.
This can eventually be increased to improve
the performance of the streaming, in particular with ESP32 modules
that include the PSRAM.
Example:
PLAY.STREAM
"http://audio4.nemostream.tv:8011/autodj",
50000
The sound is always played in the background,
even if the program is stopped, until the end of the file (or
forever for the web radios).
As the sound is played in the background, the
functionPLAY.ISPLAYING
returns the following values :
VALUE
|
DESCRIPTION
|
0
|
The sound is
stopped
|
1
|
The mp3 file is
playing
|
2
|
The wav file is
playing
|
To stop playing, the command is :
PLAY.STOP
The volume can be changed with the
command:
PLAY.VOLUME vol
‘vol’ is by default 100 and represents the
full volume (100%).
In case of sound files recorded with low
volume, it is also possible to specify a value greater than
100.
Take into account that the output audio will
saturate if the value is too high.
Example
PLAY.VOLUME 50
‘set the sound at 50% of normal volume.
A new feature has been included that enables
to create a VU meter for the left and right channels.
The functions
PLAY.VU_L and
PLAY_VU_R returns the average value of the sound
currently playing for the left and right channel.
These functions return a value between 0 and
32767.
This value is computed with the average of the
last 1024 samples of the sound currently playing.
This can be eventually changed using the
function
PLAY.VU_AVERAGE value
It must be noted that this value must be
converted in logarithmic scale before being used as a vu meter.
Metadata Decoding from Mp3 and
streaming
Annex includes another functionality that
automatically extracts the metadata information from the media
playing.
The metadatas are information that are
included inside the stream of data and contains useful information
such as the title of the song, the artist, the name of the radio
station, etc.
These are usually named ICY for the web radios
and ID3 for the mp3 files.
As these information are “async” because can
arrive at any time during the listening, another event has been
included for this purpose.
The name of this event is
ONPLAY label
and it simply jumps at the label specified as soon as a play event
occurs.
Is then possible to read the information
received using the function
play.message$
This function returns a message in the form of
metaname=value
Example Artist=Police
and Title=Roxanne
The following “metadata” information are
implemented
Name
|
DESCRIPTION
|
Group
|
Title
|
The title of the
song currently played
|
mp3
|
Artist
|
The mp3 file is
playing
|
mp3
|
SiteName
|
Name of the web
radio
|
Web radio
|
Genre
|
Genre of the web
radio
|
Web radio
|
StreamTitle
|
The title of the
song currently played
|
Web radio
|
Bitrate
|
Bitrate (in Kbs) of
the web radio
|
Web radio
|
Another “special” metadata is also included
that is raised when the mp3 song is over.
In this case
play.message$ returns Status=end
This is useful to indicate to switch to the
next song when using Annex as an mp3 file player.
SPEECH SYNTHESIS with vintage C64
SAM speaker
Annex integrates SAM, a port of the
reverse-engineered speech synthesizer Software Automatic Mouth
(SAM)
Sam is a very small Text-To-Speech (TTS)
program written in C, that runs on most popular platforms. It is an
adaption to C of the speech software SAM (Software Automatic Mouth)
for the Commodore C64 published in the year 1982 by Don't Ask
Software (now SoftVoice, Inc.). It includes a Text-To-Phoneme
converter called reciter and a Phoneme-To-Speech routine for the
final output. It is so small that it also works on embedded
computers.
The sound output and the volume follow the
same rules defined in the previous chapter
To use it, the command is:
PLAY.SPEAK“message”
[,
phonetic]
Example
PLAY.SPEAK
“The quick brown fox jumps over the lazy dog”
Using an optional parameter “phonetic” to 1,
it is possible to use the synthesys in phonetic mode
This table lists the phonemes available:
VOWELS VOICED
CONSONANTS
IY
f(ee)t
R red
IH
p(i)n
L allow
EH
beg
W away
AE
Sam
W whale
AA
pot
Y you
AH
b(u)dget
M Sam
AO
t(al)k
N man
OH
cone
NX so(ng)
UH
book
B bad
UX
l(oo)t
D dog
ER
bird
G again
AX
gall(o)n
J judge
IX
dig(i)t
Z zoo
ZH plea(s)ure
DIPHTHONGS V
seven
EY
m(a)de
DH (th)en
AY
h(igh)
OY
boy
AW
h(ow)
UNVOICED CONSONANTS
OW
slow
S Sam
UW
crew
Sh fish
F fish
TH thin
SPECIAL PHONEMES
P poke
UL
sett(le)
(=AXL)
T talk
UM
astron(omy) (=AXM)
K cake
UN
functi(on) (=AXN)
CH speech
Q
kitt-en (glottal stop)
/H a(h)ead
|
The complete documentation of the original SAM
can be found here :
http://www.retrobits.net/atari/sam.shtml
SPEECH SYNTHESIS using google
translate
Annex32 implements a feature permitting speech
texts using the voice synthesis available in google translate.
Obviously this feature requires the module to
be connected to the internet.
The command is
PLAY.VOICE"message",
"language" [, "filename"] [, action]
Example:
PLAY.VOICE"Hello
World with Annex 32",
"en" 'speech this text in english
The voice sound (in mp3 format) is first
downloaded locally to the local disk then is played using the
internal MP3 player. By default the sound is saved as
/_voice.mp3 but the name can be changed using the
optional parameter
"filename".
This permits to “reuse” these saved “speech”
files at a later time, simply playing them like regular mp3
files.
This is particularly useful because the voice
download process is not immediate (it takes a few seconds).
The last optional parameter
(action) can be used to modify the default behaviour
as defined below :
VALUE
|
DESCRIPTION
|
0
(default)
|
Stop
a sound in progress and speech
|
1
|
Waits
for the end of the sound in progress and then speech
|
2
|
Simply save the sound as file on the disk
|
The message should
be limited to less than 200 characters.
The language should
be any valid google language code:
PLAY.VOICE"Hello
World with Annex 32",
"en" 'standard English British
PLAY.VOICE"Hello
World with Annex 32",
"en-US" ' US (American) English
PLAY.VOICE"Benvenuti
in Annex 32",
"it" ' Italian
PLAY.VOICE"Bonjour
avec Annex 32",
"fr" ' French
PLAY.VOICE"Bonjour
avec Annex 32",
"fr-CA" ' French Canadian
The complete list
of google “language codes” can be found here :
https://cloud.google.com/text-to-speech/docs/voices
LCD DISPLAY USING I2C
An LCD display can be connected to the module
using I2C interface.
These displays are very cheap and available on
Ebay at less than 4€.
This picture shows an LCD with 4 lines at 20
characters per line.
In general these displays are based on the
chip HD44780 and work with a parallel interface.
Because the number of pins available on the
ESP module is very limited, there is an additional module (usually
supplied with the display) which allows connection using the 2-wire
I2C bus.
This picture shows the module (generally
soldered in the back of the display) enabling the I2C
connection.
These modules are based on the chip PCF8574
and have the following relationship between the display pins and
the bits of the PCF8574:
PCF8574
BIT
|
LCD
SIGNAL
|
|
PCF8574 BIT
|
LCD SIGNAL
|
BIT
0
|
RS
|
|
BIT 4
|
D4
|
BIT
1
|
RW
|
|
BIT 5
|
D5
|
BIT
2
|
E
|
|
BIT 6
|
D6
|
BIT
3
|
BACKLIGHT
|
|
BIT 7
|
D7
|
However, this mapping is managed directly into
the ESP module so you don’t need to worry about it.
The only important information is the I2C
address of the display which may change depending on the card.
The connection is very simple, just 2 pins for
the I2C and the power supply are required.
An important point is that the display must be
powered with 5V because it will not work at 3.3 V.
In order to use the LCD, there are 2 steps
:
-
Initialise the I2C bus
-
Init the display
This can be done with the following commands
:
I2C.SETUP 21,
22 ' set I2C port on pins 21 and 22
LCD.INIT 63, 20,
4 ‘ init an LCD at address 63 (3F in hex) with 20
characters per line and 4 lines
After these 2 lines, there are 2 additional
commands available :
LCD.CLS ‘ clear the screen of the LCD
LCD.PRINT x, y,
text$ ‘ print a text on the LCD at the position
(x, y)
Example:
I2C.SETUP 21,
22 ' set I2C
port on pins 21 and 22
'init an LCD
at address 63 (3F in hex) with 20 characters per line and 4
lines
LCD.INIT
63, 20,
4
LCD.CLS
' clear the screen of the
LCD
'print a
message on the LCD at the first char of the first
line
LCD.PRINT
1, 1,
"HELLO WORLD"
|
In addition it is possible to control the
backlight of the display using the functions
LCD.OFF
' turns OFF the backlight of the
LCD
LCD.ON '
turns ON the backlight of the
LCD
The LCD has the capability to hold 8 custom
characters identified as the ASCII chars from 0 to 7.
The command
LCD.CUSTOM char,
array() enables to define these custom characters.
For example, to define the custom char 2 :
dim a(8)
= 0, 0, 10, 21, 17, 10, 4, 0
'these are 8 bytes defining the 8
rows
LCD.CUSTOM 2,
a() 'set the character 2
LCD.PRINT 1,1,
CHR$(2)
' print the char
Finally the command
LCD.WRITE char
enables to print a single char;
It enables, in particular, to print the
character 0 (that is ignored in
LCD.PRINT).
For example, this program :
I2C.SETUP 4, 5
'set I2C port on pins 4 and
5
'init an LCD at address 63 (3F in hex) with 20 characters per line
and 4 lines
LCD.INIT 63, 20,
4
LCD.CLS
' clear the screen of the
LCD
'print a message on the LCD at the first char of the first
line
LCD.PRINT 1, 1,
"HELLO WORLD"
'Create 8 custom chars
dim a(8)
= 0, 0, 10, 21, 17, 10, 4, 0
'Heart
LCD.CUSTOM 0,
a()
dim a(8)
= 0, 0, 10, 31, 31, 14, 4, 0
'Heart filled
LCD.CUSTOM 1,
a()
dim a(8)
= 0, 10, 0, 0, 17, 14, 0, 0
'smile
LCD.CUSTOM 2,
a()
dim a(8)
= 0, 10, 0, 0, 14, 17, 0, 0
'sad
LCD.CUSTOM 3,
a()
dim a(8)
= 0, 14, 17, 17, 17, 10, 10, 27
'omega
LCD.CUSTOM 4,
a()
dim a(8)
= 4, 14, 31, 4, 4, 4, 4, 4
'arrow up
LCD.CUSTOM 5,
a()
dim a(8)
= 4, 4, 4, 4, 4, 31, 14, 4
'arrow down
LCD.CUSTOM 6,
a()
dim a(8)
= 0, 4, 10, 17, 10, 4, 0, 0
'diamond
LCD.CUSTOM 7,
a()
LCD.print 1 ,2,
"" 'set the cursor on the 2nd
line
'Print the 8 custom chars
for z
= 0 to 7
LCD.WRITE z
next z
|
Will give this result on the LCD:
The custom characters can be created online
using this website https://maxpromer.github.io/LCD-Character-Creator/
For example, the char defined in the image,
can be defined in annex as below :
dim a(8)
= &h04, &h0E, &h1F,
&h04, &h04, &h1F &h0E, &h04
LCD.CUSTOM 3,
a()
|
OLED DISPLAY
An OLED display can be connected to the module
using I2C interface.
These displays are very cheap and available on
Ebay at less than 3€.
This picture shows an OLED with 128 x 64
pixels monochrome but the size is only 0.96".
This display is based on the chipset
SSD1306
It is also possible to use a display based
on the chipset SH1106[18] .
The connection is very simple, just 2 pins for
the I2C and the power supply are required.
In order to use the OLED, there are 2 steps
:
-
Initialise the I2C bus
-
Init the display
This can be done with the following commands
:
I2C.SETUP 21,
22 ' set I2C
port on pins 21 and 22
OLED.INIT orientation
'init with a
given orientation (0 = normal, 1 = upside-down)
After these 2 lines, there are several
commands available :
OLED.CLS, OLED.COLOR, OLED.FONT, OLED.PIXEL, OLED.LINE, OLED.RECT,
OLED.CIRCLE, OLED.PRINT, OLED.IMAGE, OLED.REFRESH
The current implementation of the OLED is
based on a double buffering; this permits drawing in background on
the screen while the current image is still shown. This technique
permits to avoid flickering while drawing objects on the screen.
The command
OLED.REFRESH fmt
allows users to choose between an automatic refresh
(OLED.REFRESH
1)
or a manual refresh (OLED.REFRESH
0).
By default the refresh is automatic.
When an automatic refresh is set, the image is
immediately updated after each drawing command, whereas with the
manual refresh, the image is refreshed only when an
OLED.REFRESH command is executed.
The
OLED.COLOR col
defines the color to be used by the different drawing commands. As
the display is monochrome, only the color 0 (black) and 1(white)
can be defined; an additional color 2 (reverse) permits to draw
objects in reverse to the existing color already present on the
screen; useful to draw and clear the same object. By default the
color is 1 (white).
The
OLED.IMAGE x, y,
image$ permits to draw an image on the screen from a
file. The file format must be XBM, a kind of ‘C’ source code. This
format is not really popular but it is supported by the free tool
Gimp.
The command
OLED.FONT font_num
permits to define the font to be used by the command
OLED.PRINT.
There are 3 fonts available, ARIAL MT10,
ARIAL MT16, ARIAL MT24.
Example:
I2C.SETUP 21,
22 ' set I2C
port on pins 21 and 22
OLED.INIT
1
' init the
OLED upside-down
OLED.CLS
' clear the
screen
OLED.FONT
2
OLED.COLOR
1
OLED.PRINT
10,10, "HELLO
WORLD"
|
ST7920 LCD DISPLAY
An ST7920 LCD display can be connected to the
module using SPI interface.
These displays are very cheap and available on
Ebay at less than 5€.
This picture shows an ST7920 with 128 x 64
pixel monochrome.
Some cheap boards will have PSB
connected to VDD (5v) This forces the parallel interface to be
used. Before you connect your display check that pin 2 (VDD ,5v)
and pin 15 (PSB) are not connected. If they are you may
need to cut a jumper. Otherwise you will short out your power
supply, and the display will not work.
This display is provided with a parallel
interface BUT it can be used with a SPI interface, so only 3 pins
are required.
In order to use the display, it must be
initialised.
This can be done with the following
command:
ST7920.INIT CS_pin
As per the wiring above, the command is
ST7920.INIT
15
After these 2
lines, there are several commands available :
ST7920.CLS,
ST7920.COLOR, ST7920.FONT, ST7920.PIXEL, ST7920.LINE, ST7920.RECT, ST7920.CIRCLE, ST7920.PRINT, ST7920.IMAGE, ST7920.REFRESH
The current implementation of the ST7920 is
based on a double buffering; this permits to draw in background on
the screen while the current image is still shown. This technique
permits to avoid flickering while drawing objects on the screen.
The command
ST7920.REFRESH fmt
allows to choose between an automatic refresh (ST7920.REFRESH
1)
or a manual refresh (ST7920.REFRESH
0).
By default the refresh is automatic.
When an automatic refresh is set, the image is
immediately updated after each drawing command whereas, with the
manual refresh, the image is refreshed only when an
ST7920.REFRESH command is executed.
The
ST7920.COLOR col
defines the color to be used by the different drawing commands. As
the display is monochrome, only the color 0 (black) and 1(white)
can be defined; an additional color 2 (reverse) permit to draw
object that reverse the existing color already present on the
screen; useful to draw and clear the same object. By default the
color is 1 (white).
The
ST7920.IMAGE x, y,
image$ permit to draw an image on the screen from a
file. The file format must be XBM, a kind of ‘C’ source code. This
format is not really popular but it is supported by the free tool
Gimp.
The command
ST7920.FONT font_num
permits to define the font to be used by the command
ST7920.PRINT.
There are 3 fonts available, ARIAL MT10,
ARIAL MT16, ARIAL MT24.
Example:
ST7920.INIT
15
' init the ST7920 with the CS at the
pin 15
ST7920.CLS
' clear the screen
ST7920.FONT
2
ST7920.COLOR
1
ST7920.PRINT
10,10,
"HELLO WORLD"
|
RTC
module
A module based on chipset DS1307 or DS3231 can
be connected to the module using the I2C interface.
These modules are very cheap and available on
Ebay at less than 2€ (check if battery is included).
This picture shows a DS3231 module which is
very compact and already contains two 4.7K I2C pullups :
The connection is very simple, just 2 pins for
the I2C and the power supply are required.
Available Instructions:
RTC.DATE$[(format)]
RTC.TIME$
RTC.SETTIME Year,
Month, Day, Hours, Minutes, Seconds
The use of the RTC module is very simple.
First the I2C must be initialised with the
command
I2C.SETUP.
Then the date and the time can be read with
the string functions
RTC.TIME$ and
RTC.DATE$.
This time and date can be manually set using
the command
RTC.SETTIME.
The Syntax is :
RTC.SETTIME
Year, Month,
Day, Hours, Minutes, Seconds
Example
Set the date to 02 September 2017 at
13:58:12
RTC.SETTIME 17, 9, 2,
13, 58, 12
Example
I2C.SETUP 21,
22 ' set I2C
port on pins 21 and 22
Print
"The date is
" +
RTC.DATE$
Print
"The time is
" +
RTC.TIME$
|
PCA9685
(PWM / Servo) Module
A PWM / Servo module based on chipset
PCA9685 can be connected to the module using the I2C
interface.
These modules are very cheap and available on
Ebay at less than 2€.
This picture shows a PCA9685 module that makes
available up to 16 PWM / Servo outputs.
The PCA9685 is an I²C-bus controlled
16-channel controller optimized for Red/Green/Blue/Amber (RGBA)
color backlighting applications. It operates at a programmable
frequency from a typical of 24 Hz to 1526 Hz. All outputs share the
same PWM frequency.
The duty cycle for each output is adjustable
from 0 % to 100 % with 12-bit resolution (4096 steps).
It can also be used to control servo
actuators, simply specifying the PWM frequency at 50 Hz.
This module must be connected using I2C and,
because it already contains two 10K I2C pullups, no external
resistors are required.
Available Instructions:
PCA9685.SETUP address
PCA9685.SETFREQ freq
PCA9685.PWM
pin,
value
In order to use the module, it must be first
set with the command
PCA9685.SETUP address
Then the PWM frequency can be set with the
command
PCA9685.SETFREQ freq
FInally, the outputs can be driven with the
command
PCA9685.PWM pin,
value
This is an example that drives 2 servos
connected on outputs 0 and 1.
PCA9685.SETUP
&H40, 55
PCA9685.SETFREQ
50
PCA9685.PWM
0,
150
PCA9685.PWM
1,
100
DX
= 1
DY
= 1
MINX
= 100 : MAXX = 500
MINY
= 150 : MAXY = 300
X
= MINX : Y = MINY
WHILE
1
PCA9685.PWM 0, Y
PCA9685.PWM 1, X
PAUSE 30
PRINT Y, DY, MAXY
X
= X +
DX
Y
= Y +
DY
IF (X <
MINX) OR (X
> MAXX) THEN DX
= -
DX
IF (Y <
MINY) OR (Y
> MAXY) THEN DY
= -
DY
WEND
END
|
TM1637
display module
A display module based on the chipset TM1637
with 4 7-segments display can be connected to the module.
These modules are very cheap and available on
Ebay at around 1€.
This picture shows a module with 4 displays at
0.36”.
The connection is very simple, just 2 pins and
the power supply are required.
Even if the protocol is very similar to the
I2C, it is quite different, so the I2C pins used for other I2C
devices cannot be shared as this will conflict.
Available Instructions are:
TM1637.PRINT msg$
[, brightness [, dotpoints]]
TM1637.SETUP data_pin,
clock_pin [,
bit_delay]
To use it, is very simple.
First initialise the display with the command
TM1637.SETUP data_pin,
clock_pin [,
bit_delay]
With the wiring above, the command must be
:
TM1637.SETUP 15,
16
Note that some modules may
already include i2c pullup resistors on board (so simply try first
without).
It is important to
highlight that some display modules may have a capacitor on the
input pins.
In that case it will
require an extra parameter (bit_delay) at the end of the
setup command.
This value can be
experimentally found, but a value of 100 should be appropriate for
all the modules.
Example :
TM1637.SETUP 4, 5,
100
The display can be used with the command
TM1637.PRINT msg$
[, brightness [, dotpoints]]
Where
msg$ is a text string that can contain
up to 4 chars,
brightness defines the luminosity of
the display from 0 (OFF) to 7 (MAX); if omitted the value is 7
dotpoints defines if the 2 dot points
must be OFF (if 0) or ON (if 255); if omitted, the points are
OFF
All ASCII
characters can be used but will be shown within the limitation of
the 7 segments of the display.
Example
TM1637.SETUP
15, 16,
100
For
i
= 0 to 9999
TM1637.PRINT str$(i), 4,
255
Next
i
|
TM1638
display module
A display module based on the chipset TM1638
with 8 7-segments display can be connected to the module.
These modules provide 8 LEDs, 8 Digits and 8
Keypad Interface.
These modules are very cheap and available on
Ebay at around 2€.
This picture shows a module with 8 digits at
0.36”, 8 leds and 8 buttons
The connection requires 3 pins plus the power
supply.
Available Instructions are:
TM1638.BUTTONS
TM1638.PRINT msg$
[, brightness ]
TM1638.SETUP data_pin,
clock_pin, strobe_pin
TM1638.LEDS val
To use it, is very simple.
First initialise the display with the command
TM1638.SETUP data_pin,
clock_pin, strobe_pin
With the wiring above, the command must be
:
TM1638.SETUP 21, 22,
15
The display can then be used with the command
TM1638.PRINT msg$
[, brightness ]
Where
msg$ is a text string that can contain
up to 8 chars ,
brightness defines the luminosity of
the display from 0 (OFF) to 15 (MAX); if omitted the value is
15
All ASCII
characters can be used but will be shown within the limitation of
the 7 segments of the display.
Example
TM1638.SETUP
21, 22,
15
For
i
= 0 to 9999
TM1638.PRINT str$(i)
Next
i
|
As the module contains also 8 leds, it is
possible to control them using the command
TM1638.LEDS val.
val is a 8 bit number where each bit is
associated to a led.
Example
TM1638.SETUP
21, 22,
15
For
i
= 0 to 255
TM1638.LEDS i
Next
i
|
It is also possible to get the status of the
buttons with the function
TM1638.BUTTONS
Example
TM1638.SETUP
21, 22,
15
For
i
= 0 to 5000
Print TM1638.BUTTONS
Next
i
|
MAX7219
8-Digits 7-segment display
A display module based on the chipset MAX7219
with 8 7-segments display can be connected to the module.
These modules provides 8 Digits
7-segments display including dot points.
These modules are very cheap and available on
Ebay at around 2€.
This picture shows a module with 8 digits at
0.36”.
The wiring is done using the SPI bus plus a
dedicated CS pin.
Available Instructions are:
MAXDISPLAY.SETUP CS_pin
MAXDISPLAY.PRINT msg$
[,brightness]
To use it, is very simple.
First initialise the display with the command
MAXDISPLAY.SETUP CS_pin
With the wiring above, the command must be
:
MAXDISPLAY.SETUP 15
The display can then be used with the command
MAXDISPLAY.PRINT msg$
[,brightness]
Where
msg$ is a text string that can contains
up to 8 chars ,
brightness defines the luminosity of
the display from 0 (OFF) to 15 (MAX); if omitted the value is
15
All ASCII
characters can be used but will be shown within the limitation of
the 7 segments of the display.
Example
MAXDISPLAY.SETUP
15
For
i
= 0 to 9999
MAXDISPLAY.PRINT str$(i)
Next
i
|
MAX7219
Dot Matrix Display
It is also possible to connect dot matrix
modules based on the chipset MAX7219.
These modules contain 4 8x8 dot matrix
displays each one with a dedicated MAX7219 chip.
These modules can be chained in order to
compose a larger display.
The picture shows a module available on Ebay
at around 5€.
The wiring is done using the SPI bus plus a
dedicated CS pin.
Available Instructions are:
MAXSCROLL.SETUP nb_devices,
CS_pin
MAXSCROLL.PRINT msg$
MAXSCROLL.NEXT msg$
MAXSCROLL.TEXT msg$
MAXSCROLL.SHOW position
[, brightness]
MAXSCROLL.SCROLL
[brightness]
MAXSCROLL.OSCILLATE
[brightness]
To use it, the first command required is the
setup of the display.
This can be done with the command
MAXSCROLL.SETUP nb_devices,
CS_pin.
The first argument defines
the number of 8x8 displays connected; using the module shown above,
the number is 4.
The 2nd argument defines
the pin used for the CS signal; using the schematic shown above the
pin is 15 (GPIO15). In our case the command must be :
MAXSCROLL.SETUP
4,
15
The text can then be set on the display with 3
different commands :
1.
MAXSCROLL.PRINT
msg$
2.
MAXSCROLL.NEXT
msg$
3.
MAXSCROLL.TEXT msg$
The first will set the text that will be shown
at the beginning, the 2nd will set the text that will be shown when
the first one will be scrolled out of the display and the 3rd will
permit to modify immediately the text shown.
For example,
MAXSCROLL.PRINT
"Hello"
MAXSCROLL.NEXT
"Friend"
Will permit to show “Hello” at the beginning;
then as soon as “Hello” is scrolled out of the screen, the text
“Friend” will be shown and it will scroll on the display forever
until the next execution of the command
MAXSCROLL.NEXT msg$
The command
MAXSCROLL.TEXT msg$
will permit to modify the text during the scrolling sequence,
useful for “dynamic” messages (i.e time/date information).
The command
MAXSCROLL.SHOW position
[,
brightness] will
permit to move the text in a given position.
The position 1 is the rightmost line of the
display, and increasing this value will move the text more to the
left.
Optionally it is possible to define the
brightness of the display.
The last set of commands is composed of
1.
MAXSCROLL.SCROLL
[brightness]
2.
MAXSCROLL.OSCILLATE
[brightness]
The first will permit to scroll the text from
the right to the left and, when the text will be completely
scrolled out, it will restart again with the same text or, if
defined, with the text set with the command
MAXSCROLL.NEXT.
The 2nd will permit to scroll the text from
the right to the left and, when the text will be completely
scrolled out, it will be scrolled back in the opposite direction
until it will reach the initial position, then the process will
restart again.
These 2 commands have an optional parameter
permitting to define the luminosity of the display in a range from
0 (min) to 15 (max); the default value is 0.
As the message requires a continuous
scrolling, these commands must be called on a timed interval (using
a timer).
Let us show an example using the SCROLL
command
'Set 4 8x8
displays with GPIO15 as CS pin
MAXSCROLL.SETUP
4,
15
'Set the
first message as the current time
MAXSCROLL.PRINT
TIME$
'Set the
second message as the current date
MAXSCROLL.NEXT
DATE$
'Set the
refresh rate of the display (50 msec) - lower values -> scroll
faster
TIMER0
50,
SCROLLME
WAIT
SCROLLME:
'Scroll the display with an intensity of
5
MAXSCROLL.SCROLL 5
RETURN
|
This is another example using the
OSCILLATE command:
'Set 4 8x8
displays with GPIO15 as CS pin
MAXSCROLL.SETUP
4, 15
'Set the
message
MAXSCROLL.PRINT
"Hello
World"
'Set the
refresh rate of the display (50 msec) - lower values -> scroll
faster
TIMER0
50,
SCROLLME
WAIT
SCROLLME:
'Oscillate
the display with an intensity of 5
MAXSCROLL.OSCILLATE
5
RETURN
|
NeoPixel WS2812B led strips
It is possible to connect NeoPixel led strips
based on WS2812B Leds.
These strips are generally available in a
linear form but also as a circular array.
[19]
The wiring is very simple as only one output
pin is required for the ESP32.
The strips must be supplied at 5V with a
dedicated power-supply.
As each led could require up-to 60mA, the
power supply must be sized in consequence.
The strip is considered as a sequence of leds
where each one has a position and can have a different color.
From a logical point of view, even the
circular array is seen as a linear strip with a start and end
position.
Then the following commands are available
:
NEO.SETUP pin,
[nb_led]
NEO.STRIP led_start_pos,
led_end_pos, R, G, B [, disable]
NEO.STRIP led_start_pos,
led_end_pos, COLOR [, disable]
NEO.PIXEL led_pos,
R, G, B [, disable]
NEO.PIXEL led_pos,
COLOR [, disable]
NEO.RGB(R,
G, B)
NEO.GETPIXEL(pos)
The first command,
NEO.SETUP pin,
[nb_led], defines the pin to be used as output and the
size (in pîxels) of the led strip.
For example
NEO.SETUP 2,
60 defines a strip containing 60 leds (or a ring
with 60 leds) connected on the pin GPIO02.
This creates a local memory buffer of the
strip line permitting the manipulation of the colors in the
background.
Then, the leds of the strips can be addressed
taking into account that the first led has the position 0 and the
last has the position (nb_led - 1).
For example, using the declaration
NEO.SETUP 2,
60, the last led has the position 59.
The leds can then be addressed individually
using the command
NEO.PIXEL or as a block using the commandNEO.STRIP.
For example,
NEO.PIXEL 10, 255,
0, 0 sets the led at the position 10 with the
color RED and the command
NEO.STRIP 20, 30, 0,
0, 255 sets the leds at positions 20 through 30
with the color BLUE
The colors can be specified as a sequence of 3
numbers from 0 to 255 representing the intensity for the Red, Green
and Blue components, or as a single 24bit number where the 3 colors
are merged together as one.
The function
NEO.RGB(R,
G, B) permits to
generate this merged color.
For example, these 3 commands produce the same
effect :
NEO.STRIP
0, 10, 0,
255, 0
NEO.STRIP
0, 10,
NEO.RGB(0, 255, 0)
NEO.STRIP
0, 10,
65280
The optional argument [,
disable] if set to 1, permits to write new led values
into memory without refreshing the strip. This is useful to
manipulate several leds, refreshing the complete line only when
required.
For example, with the following program, all
the leds will be refresh one by one at 100ms interval :
NEO.SETUP 60
FOR z
= 0 TO 59
NEO.PIXEL z, 128
PAUSE 100
NEXT z
But, with the following program, all the leds
will be updated in a single shot at the end (after 6 seconds) :
NEO.SETUP 60
FOR z
= 0
TO 59
NEO.PIXEL z, 128,
1
PAUSE 100
NEXT z
NEO.PIXEL 59,
128
NeoPixel
based WS2812b Dot Matrix DIsplay
It is also possible to connect Dot Matrix
modules based on WS2812B Leds.
These modules contain 64 WS2812B leds
organised in an 8x8 matrix.
Several modules can be chained in order to
compose a large display.
The wiring is very simple as only one output
pin is required for the ESP32.
The modules must be supplied at 5V with a
dedicated power-supply.
It must be taken into account that these 8x8
modules can require a lot of current, in particular if all the leds
are at max intensity.
As each led could require up-to 60mA, the
power supply must be sized accordingly.
From a practical point of view, the displays
will probably never show all the pixels at the same time, so we can
consider at least 2 amps per display (so 20 amps for 10
displays).
Available Instructions are:
NEOSCROLL.SETUP nb_devices,
pin [, serpentine]
NEOSCROLL.PRINT msg$
NEOSCROLL.NEXT msg$
NEOSCROLL.COLORS col$
NEOSCROLL.NEXTCOLORS col$
NEOSCROLL.SHOW pos
[, brightness]
NEOSCROLL.TEXT msg$
NEOSCROLL.SCROLL
[brightness]
NEOSCROLL.OSCILLATE
[brightness]
NEOSCROLL.CLS
[refresh]
To use it, the first command required is the
setup of the display.
This can be done with the command
NEOSCROLL.SETUP nb_devices,
pin [, serpentine].
The first argument defines the number of 8x8
modules connected; using the schematic shown above, the number is
4.
The 2nd argument defines the pin used for the
input signal; using the schematic shown above the pin is 2
(GPIO2).
The 3rd argument defines if the display itself
is arranged in a linear way or as a serpentine.
If it is 0 (default) the normal layout is
selected, if it is 1, the serpentine layout is chosen.
In our case the command must be :
NEOSCROLL.SETUP
4,
2
The text can then be set on the display with 3
different commands :
4.
NEOSCROLL.PRINT
msg$
5.
NEOSCROLL.NEXT
msg$
6.
NEOSCROLL.TEXT msg$
The first will set the text that will be shown
at the beginning, the 2nd will set the text that will be shown when
the first one will be scrolled out of the display and the 3rd will
permit to modify immediately the text shown.
For example,
NEOSCROLL.PRINT
"Hello"
NEOSCROLL.NEXT
"Friend"
Will permit to show “Hello” at the beginning;
then as soon as “Hello” is scrolled out of the screen, the text
“Friend” will be shown and it will scroll on the display forever
until the next execution of the command
NEOSCROLL.NEXT msg$
The command
NEOSCROLL.TEXT msg$
will permit to modify the text during the scrolling sequence,
useful for “dynamic” messages (i.e time/date information).
As the display permits to show colors, 2 more
commands are available:
1.
NEOSCROLL.COLORS col$
2.
NEOSCROLL.NEXTCOLORS col$
The first defines the colors of the text set
with the commandNEOSCROLL.PRINT
whilst the 2nd defines the colors of the text set with the command
NEOSCROLL.NEXT.
These command
NEOSCROLL.COLORS defines the color of each character of
the text set with the command
NEOSCROLL.PRINT .
The logic is based on a one-to-one
correspondence between the text string and the color string.
The color is based on this table :
COLOR
|
CODE
|
Blue
|
B
|
Green
|
G
|
Cyan
|
C
|
Red
|
R
|
Magenta
|
M
|
Yellow
|
Y
|
Black
|
K
|
White
|
W
|
White
|
Any other
char
|
For example, the commands
NEOSCROLL.PRINT
"Hello"
NEOSCROLL.COLOR
"RGBCM"
Will show the string “Hello” where the first
character is Red, the 2nd Green, the 3rd Blue, ….
With the same logic, the commands
NEOSCROLL.NEXT
"Friend"
NEOSCROLL.NEXTCOLOR
"YWRGBM"
Will show the string “Friend”
where the first character is Yellow, the 2nd White, the 3rd Red,
….
The command
NEOSCROLL.SHOW position
[, brightness] will permit to move the text in
a given position.
The position 1 if the rightmost line of the
display and increasing this value will move the text more to the
left.
Optionally is is possible to define the
brightness of the display.
The last set of commands is composed of
3.
NEOSCROLL.SCROLL
[brightness]
4.
NEOSCROLL.OSCILLATE
[brightness]
The first will permit to scroll the text from
the right to the left and, when the text will be completely
scrolled out, it will restart again with the same text or, if
defined, with the text set with the command
NEOSCROLL.NEXT.
The 2nd will permit to scroll the text from
the right to the left and, when the text will be completely
scrolled out, it will be scrolled back in the opposite direction
until it will reach the initial position, then the process will
restart again.
These 2 commands have an optional parameter
permitting to define the luminosity of the display in a range from
0 (off) to 255 (max); the default value is 5.
Take into account that these displays are very
bright so a luminosity of 5 is already enough.
As the message requires a continuous
scrolling, these commands must be called on a timed interval (using
a timer).
Let us show an example using the SCROLL
command
'Set 4
WS2812B displays with GPIO2 as input
NeoScroll.Setup
4,
2
'Set the
first message as the current time
NeoScroll.print
"TRY Annex WiFi
BASIC"
NeoScroll.colors
"CMYRGCRGBYWRGBCMYRGB"
'Set the
next message
NeoScroll.next
"Hello World!"
NeoScroll.nextcolors
"BYWRGBCMYRGB"
'Set the
refresh rate of the display (30 msec) - lower values -> scroll
faster
timer0
30,
scrollme
wait
Scrollme:
'Scroll the display with an intensity of
5
NeoScroll.scroll 5
return
|
This is another example using the
OSCILLATE command:
'Set 4
WS2812B displays with GPIO2 as input
NeoScroll.Setup
4,
2
'Set the
first message as the current time
NeoScroll.print
"000"
NeoScroll.colors
"RBG"
'Set the
refresh rate of the display (50 msec) - lower values -> scroll
faster
timer0
50,
scrollme
'Set the
counter at 0
v = 0
'Set the
incrementing rate
timer1
100,
increment
wait
Scrollme:
'Scroll the display with an intensity of
5
NeoScroll.oscillate 5
return
increment:
v = (v
+ 1) mod 1000
'increment and limits the value at
999
NeoScroll.text str$(v,
"%03f")
return
|
SD CARD
ADAPTER
An SD CARD can be connected using a module
wired as below:
The following SD CARD modules have been
successfully tested with Annex32:
Module for MicroSD with active buffer on
board.
As this module sports a voltage regulator that
converts 5V to 3.3V, it is required to bypass it using the
connection as shown in the picture below:
Module for full size SD-CARD with passive
adapters:
TFT
DISPLAY ILI9341
A TFT Display based on chipset ILI9341 can be
connected to the module using the SPI interface.
These displays are available on Ebay at
different sizes from 2.2” to 3.2” and are very cheap.
The resolution of the display is 320 x 240
pixels with 65K colors.
They can also include a touchscreen controller
to receive positional feedback via the SPI interface.
The model shown below is a 2.8” and contains
an interface for the Touch Screen.
As the interface is SPI, the display requires
at least 5 pins when connected as a display only and 6 when the
touch screen is enabled.
Additionally these displays also include
a reader that can be used to connect an SDCARD to the
module.
The image below shows an 2.8” display provided
with touch screen interface:
These displays have a little jumper
zone (J1) that must be solder-bridged if powering the module from
3.3V else it will be configured to work at 5v.
Wiring with touch and
SDCARD
[20]
[21] [22] [23]
In order to use the
TFT, the first step is to initialise the Display
This
can be done with the following commands :
TFT.INIT Orientation
Orientation is
a number between 0 and 3 specifying the TFT orientation:
0
|
Portrait
|
1
|
Landscape
|
2
|
Portrait
reversed
|
3
|
Landscape
reversed
|
The
display is initialised, by default, at 40MHz (40 000 000) but many
displays can also work at 80Mhz.
This
can be changed with the command
TFT.SETFREQ 80000000
Increasing the speed at 80 Mhz improve the performances of the
display but this does not work for all the displays (for example
does not works for the M5Stack)
The
display can then be cleared with the command
TFT.FILL color
The
display is now ready to receive drawing commands.
The
list of commands available is :
TFT.CIRCLE,
TFT.LINE, TFT.PRINT, TFT.RECT, TFT.TEXT.COLOR, TFT.TEXT.POS, TFT.TEXT.SIZE, TFT.BMP, TFT.JPG,
TFT.IMAGE, TFT.BRIGHTNESS
The
list of the functions available is:
TFT.RGB,
TFT.COLOR
The
color is defined as a number between 0 and 65535; this corresponds
to the color format named 565 where 5 bits are dedicated to Red, 6
to green and 5 to blue.
The
function TFT.RGB permits to specify the R,G,B components as numbers
from 0 to 255.
For
example the function TFT.RGB(255,0,0) defines the color RED and
TFT.RGB(0,255,0) defines the color green.
It is
also possible to define a color giving directly its name.
The
function is
TFT.COLOR(colorname)
Colorname can be :[24] [25] [26]
BLACK
|
NAVY
|
DARKGREEN
|
DARKCYAN
|
MAROON
|
PURPLE
|
OLIVE
|
LIGHTGREY
|
DARKGREY
|
BLUE
|
GREEN
|
CYAN
|
RED
|
MAGENTA
|
YELLOW
|
WHITE
|
ORANGE
|
GREENYELLOW
|
PINK
|
BROWN
|
GOLD
|
SILVER
|
SYBLUE
|
VIOLET
|
Optionally it is also possible to define the color directly with
its name even without using the TFT.COLOR syntax.
For sake of clarity
this shows all the possible ways to define the same color :
TFT.FILL 0
Or
TFT.FILL
TFT.RGB(0, 0,
0)
Or
TFT.FILL
TFT.COLOR(black)
Or
TFT.FILL black
However,
TFT.COLOR(colorname)
can be used into regular expressions as it returns the numeric
value of the color whilst the colorname
itself can be used only as argument in the functions that require a
color.
For example
Col
= TFT.COLOR(red) + TFT.COLOR(blue)
Is a valid
expression
but
Col
= Red + blue
Is not a valid
expression.
The
backlight of the display is controlled using a PWM output on the
pin GPIO32.
The
command
TFT.BRIGHTNESS value
(from 0 to 255) can be used to control the luminosity.
Look
at the documentation for the details of each command.[27]
Example
:
Tft.init 1
tft.fill 0
for r
= 0 to 30000 step 0.02
d=r/6
s=sin(r)*sin(5*r+d)*140+160
c=cos(r)*sin(5*r+d)*100+120
tft.circle
s,c,10,rnd(65535),1
next r
|
It is
also possible to save (dump) the content of the screen into a file
on the disk (FATFS or SDCARD).
Note: this will not work on the M5stack as the SPI input pin
is not wired on the display
The
command is
TFT.SAVE “/dumpfile.data”.
The
file will be stored into a “raw” format and can be open using GIMP
in raw mode; using the extension ”.data” will permit it to be
automatically recognised by GIMP.[28]
TFT
DISPLAY ILI9163
A TFT Display based on chipset ILI9163 can be
connected to the module using the SPI interface.
These displays are available on Ebay in
different sizes and are very cheap.
The model shown below is a 1.8” with a
resolution of 160 x 128 pixels with 65K colors.
As the interface is SPI, the display requires
at least 5 pins.
Additionally these displays also include a
card reader that can be used to connect an SDCARD to the
module.
These displays have a little jumper
zone (J1) that must be solder-bridged if powering the module from
3.3V else it will be configured to work at 5v.
TFT
DISPLAY ILI9486
A TFT Display based on chipset ILI9486 can be
connected to the module using the SPI interface.
These displays are available on Ebay with a
size of 3.5” and are quite cheap.
The resolution of the display is 480 x 320
pixels with 65K colors.
They can also include a touchscreen controller
to receive positional feedback via the SPI interface.
As the interface is SPI, the display requires
at least 5 pins when connected as a display only, and 6 when the
touch screen is used.
This display is a great option compared to the
ILI9341 as the higher resolution enables the creation of nicer GUI
pages with a better touchscreen interaction.
These displays have a connector adapter for
the Raspberry Pi but can easily be used with Annex.
They are built on the Waveshare design and use
a 16 bit serial interface based on the 74HC04, 74HC4040 and 2 x
74HC4094 logic chips.
The SPI max speed for these displays is
20Mhz.
This display is configured to be
supplied with 5V so the Voltage regulator must be bypassed (solder-
bridged) if it is supplied with 3.3V.
[29]
TFT
DISPLAY ST7735
A TFT Display based on chipset ST7735 can be
connected to the module using the SPI interface.
These displays are available on Ebay in
different sizes and resolutions and are very cheap.
Because there are many variants of this
display, Annex32 supports 8 different ST7735 settings in the config
menu. You should try all of them until you find the one that
matches your display.
The model shown below is a 0.96” with a
resolution of 160 x 80 pixels with 65K colors.
As the interface is SPI, the display requires
at least 5 pins.
The backlight signal is not mandatory (the LED
pin can be put to +3.3V for max intensity).
TFT
DISPLAY ST7796
A TFT Display based on chipset ST7796 can be
connected to the module using the SPI interface.
These displays are available on Ebay with a
size of 4.0” and are quite cheap.
The resolution of the display is 480 x 320
pixels with 65K colors.
They can also include a touchscreen controller
to receive positional feedback via the SPI interface.
As the interface is SPI, the display requires
at least 5 pins when connected as a display only, and 6 when the
touch screen is used.
This display is a great option compared to the
ILI9341 as the higher resolution and the quite large size of the
screen enables the creation of nicer GUI pages with a better
touchscreen interaction.
In addition it shares the same connectors
pinout with the ILI9341 modules so can then be used on PCBs already
designed for the ILI9341 and is very fast as it can be used at
80Mhz.
Additionally these displays also include
a reader that can be used to connect an SDCARD to the
module.
These displays have a little jumper
zone (J1) that must be solder-bridged if powering the module from
3.3V else it will be configured to work at 5v.
TouchScreen
The touchscreen
functionality permits to get the position of the point pressed on
the screen.
It is associated
with the event
OnTouch and the functions
TOUCH.X ,
TOUCH.Y and
TOUCH.Z.
The touchscreen
must be calibrated before first use, and also if TFT.init
orientation is changed.
This can be done
with the command TOUCH.CALIB
The user will be
asked to click on the 4 crosses for the calibration.
The calibration
result will be stored permanently inside the module and will not be
required to do anymore.
There are 2 commands to read the touchscreen
:
TOUCH.READ -> read the touchscreen position
calibrated
TOUCH.RAW -> read the touchscreen without
calibration
There are 3 functions :
TOUCH.X -> returns the X position
TOUCH.Y -> returns the Y position
TOUCH.Z -> returns the touched status (if 1 means
touched)
Example:
OnTouch
touchme
wait
touchme:
touch.read 'Read
the calibrated position
print "touched", touch.x, touch.y, touch.z
return
|
TFT
FONTS
Several text fonts are available to be used
for the TFT.
The commands are :
TFT.TEXT.FONT font_number
TFT.TEXT.SIZE font_size
TFT.LOADFONT"filename"
[, 1 | 2
]
TFT.PRINT expression
[[,; ]expression] ...
TFT.TEXT.DRAW
"text", x, y
[font]
TFT.TEXT.ALIGN alignment
TFT.TEXT.PADDING width
There are actually 8 fonts installed as shown
in the pictures below as shown on the TFT at 320x240.
The fonts 6 to 8 have only a limited set of
characters as shown in the pictures.
The font 3 and 5 are the same as the font1 but
just increased in size.
The size of the characters can be controlled
for any font using the command TFT.TEXT.SIZE font_size.
This is essentially a multiplying
coefficient that is applied to the font.
For example the font 7 with TFT.TEXT.SIZE 2
will be drawn as below
It is important to note that, except for the
font 1, the 3 and 5, the character spacing is not fixed as
the fonts are not monospace but proportional.
In addition to these fonts available by
default, it is possible to load dynamically 2 new fonts from
file.
These will be loaded into the RAM and
available as font 10 and font 11.
The fonts available are essentially all the
freefonts available in the Adafruit_GFX library format simply
converted in binary ready to be loaded into Annex.
The list is very long (~50) and many others
can be also included after conversion.
To load a new font the command is :
TFT.LOADFONT “filename” [,slot]
Where ‘slot ‘ can be 1 (default) or 2
For example, to load the font
“Orbitron_Light_32” and the font “Yellowtail_32” :
TFT.LOADFONT “/fonts/Orbitron_Light_32.bin”,
1
TFT.LOADFONT “/fonts/Yellowtail_32.bin”, 1
The result will be :
The text can be printed with or without a
background (in transparent mode), useful to superimpose the text
over an image.
This is controlled using the command
TFT.TEXT.COLOR text_color [, background_color]
If the background_color is not specified, the
text will be printed without background.
NOTE : the freefonts loaded from file
will always be “transparent” independently of the text color
setting.[30]
The text can be printed using 2 commands :
TFT.PRINT expression
[[,; ]expression] …
and
TFT.TEXT.DRAW
"text", x, y
[font]
TFT.PRINT works in the same way as the serial print
command, including all the options, and prints the text at the
position previously defined by the command
TFT.TEXT.POS x,
y
As soon as the text is printed, the position
is automatically advanced on the next line or held on the same line
if the ; is attached at the end of the command.
It has also the advantage to wrap the text
automatically on the next line as soon it goes out of the
screen.
However, this command is not very flexible and
is not adapted for text that changes dynamically.
At the opposite, the command
TFT.TEXT.DRAW is much more flexible as it enables
a strict control on the text to be drawn.
It rely on 2 other commands :
TFT.TEXT.ALIGN alignment
This command defines the alignment of the text
to be drawn, in relationship with the coordinates of the point
defined in the command
TFT.TEXT.DRAW
The table below shows all the possible
alignments
VALUE
|
KEYWORD
|
ALIGNMENT
|
0
|
ALIGN_TOP_LEFT
|
Top left
|
1
|
ALIGN_TOP_MID
|
Middle of top
|
2
|
ALIGN_TOP_RIGHT
|
Top right
|
3
|
ALIGN_MID_LEFT
|
Middle of left side
|
4
|
ALIGN_MID_MID
|
Center
|
5
|
ALIGN_MID_RIGHT
|
Middle of the right side
|
6
|
ALIGN_BOT_LEFT
|
Bottom left
|
7
|
ALIGN_BOT_MID
|
Middle of bottom
|
8
|
ALIGN_BOT_RIGHT
|
Bottom right
|
TFT.TEXT.PADDING width
This command defines the minimal width of the
text to be drawn, useful to overprint and erase old text
or numbers.
TFT.TEXT.DRAW
"text", x, y
[,font]
This command draws a text at the position
defined by x and y using the optional font
defined or the font defined with the command
TFT.TEXT.FONT.
The text is drawn using the alignment defined
with the command
TFT.TEXT.ALIGN
QR CODES
TFT.QRCODE
"message", x, y,
width [,version]
This command draws a text message on the TFT
as QR CODE that can be read using a mobile phone simply taking a
picture of the image shown on the display.
GRAPHIC
GUI for TFT
[31] A full set of
graphical objects has been included in Annex32.
There are several objects that can be defined
using a specific
GUI.xxxx function.
When defining the object, each function
returns a handler that must be stored into a variable to gain
access to this object later in the code.
All these graphical objects are strongly
associated with the touchscreen that must be calibrated before with
the command
TOUCH.CALIB.
At the beginning, the command
GUI.INIT Nb_objects,
back_color is required to define how many objects will
be declared and the initial background color.
Nb_objects
defines the max number of objects present on the screen at
the same time but the program can contain more objects.
The objects created using the functions
defined below, will not be drawn directly on the screen but will be
held in memory until the command
GUI.REFRESH is executed.
This permits us to update all the objects at
the same time.
Here is a simple example that will create two
GUI items, a textline and a button. When the button is clicked , or
the left button on M5stack is pressed, the textline changes.
'simple GUI
example
gui.init 20,
black 'reserve memory for 20 GUI
objects. clears screen to black
txt
= GUI.Textline(10,50,190,20, "Text Line Here", 2) 'x,y,w,h,text,fontsize
but
= GUI.Button(20, 200, 100, 20, "BUTTON!",2 ) 'x,y,w,h,text,fontsize
gui.setevent
but, TOUCH, buttonclick 'set
touched event, jump to buttonclick
interrupt
39,
buttonclick 'if using M5stack can't
click screen- so use left button
gui.autorefresh 30, 1
'display gui items automatically each
30ms including touch
wait
buttonclick:
gui.settext
txt,"Button Pressed"
'change text
line.
return
|
For example, defining a textline with:
TXT1
=
GUI.Textline(10,
10, 100, 20, "Hello
World!")
The variable txt1 will contain a handler
permitting to modify the properties of the textline; for example
the following line :
GUI.SetText TXT1,
"Text changed!"
Will change the text of the object previously
defined.
If it is not required to hold the handler of
the object into the code (for example if it never changes), it is
possible to ignore the handler and define the object using a
command syntax without parentheses:
GUI.Textline 10, 10,
100, 20, "Hello
World!"
GUI Objects
gui.TextLine
Txt1
=GUI.Textline(x,
y, width, height, "text" [,font]
[,color_text] [,color_back] [,color_frame] [,alignment] [,margin]
)
Font is the number of the font.
gui.Button
But1
= GUI.Button(x, y, width, height, "text" [,font]
[,radius] [,toggle] [,group] [,color_text] [,color_pressed]
[,color_released] [,color_frame] )
Font is the number of the font.
Radius is the radius of the rounded part of
the button (0 by default is not rounded).
Toggle is 0 for momentary (default) or 1 for
toggle.
Toggle can also be expressed using directly
the keywords
MOMENTARY or
TOGGLE.
Group is a number that permits to associate
interactive buttons together; this permits to deactivate a toggle
button when selecting another in the group (like a group of radio
buttons).
gui.Image
Img1
= GUI.Image(x, y, width, height, fname$ [,background]
[,background_on] [,toggle] [ group] )
The width and the height are just used to
define the touch area, because the size of the image will be
defined by the image file content.
The file can be BMP or JPG format.
The BMP can be also with 32bits permitting to
define a color background that can be eventually changed with the
command gui.setcolor.
Toggle is 0 for momentary (default) or 1 for
toggle.
Toggle can also be expressed using directly
the keywords
MOMENTARY or
TOGGLE.
Background defines the normal background color
of the image and background_on defines the background color when
the image is set to 1.
Defining 2 different colors, it is possible to
use the image as a kind of “buttonImage” where the background color
changes as a function of the button state.
Optionally the background color can be
controlled from the code using the function Gui.SetColor.
NEW: if the background is -1, the
background around the image will be transparent
gui.ButtonImage
A combination of a button with 2 images
Img2
= GUI.ButtonImage(x, y, width, height, image1$, image2$
[,toggle], [group] ,
[background] )
The width and the height are just used to
define the touch area, because the size of the image will be
defined by the image file content.
The files can be BMP or JPG format.
The BMP can also be 32bits permitting to
define a color background with the command gui.setcolor.
Toggle is 0 for temporary (default) or 1 for
toggle.
Toggle can also be expressed using directly
the keywords
MOMENTARY or
TOGGLE.
Group is a number that permits to associate
interactive buttons together; this permits to deactivate a toggle
button when selecting another in the group (like a group of radio
buttons).
Background is the background color (for
transparent images)
NEW: if the background is -1, the
background around the image will be transparent
gui.CheckBox
Chk1
= GUI.CheckBox(x, y, width, height, value [, style]
[,group] [,color_set] [,color_back] [,color_frame] )
Font is the size of the font.
Value is the initial value of the checkbox (0
or 1.)
Style is : 0 for squared checkbox, 1 for
crossed checkbox, 2 for circular checkbox (radio button).
Style can also be expressed using directly the
keywords
SQUARED ,
CROSSED or
RADIO.
By default the style is
SQUARED.
Group is a number that permits to associate
interactive checkboxes together; this permits to deactivate a
checkbox when selecting another in the group (like a group of radio
buttons).
gui.Slider
Sld1
= GUI.Slider(x, y, width, height, value [,orientation]
[,color_cursor]
[,color_back] )
The slider has by default a range from 0 to
100.
Value permits to define the default value.
Orientation can be 0 (default) for horizontal
and 1 for vertical.
Orientation can also be expressed using
directly the keywords
HORIZONTAL or
VERTICAL.
gui.ProgressBar
Prg1
= GUI.ProgressBar(x, y, width, height, value
[,orientation] [,color_set] [,color_back]
[,color_frame] )
The progressBar has by default a range from 0
to 100.
Value permits to define the default value.
Orientation can be 0 (default) for horizontal
and 1 for vertical.
Orientation can also be expressed using
directly the keywords
HORIZONTAL or
VERTICAL.
gui.Ramp
Rmp1
= GUI.Ramp(x, y, width, height, value)
The ramp has by default a range from 0 to
100.
gui.Gauge
Gau1
= GUI.Gauge(x, y, width, height, value [,color_needle]
[,color_back] [,color_frame] [,color_ticks]
)
The gauge has by default a range from 0 to
100.
gui.Box
Box1
= GUI.Box(x, y, width, height, color1 [,frame_color [,color2]])
The box has by default a unique color with a
white frame around.
The optional parameter ‘frame_color” defines
the color of the frame.
The optional parameter ‘color2’ allows the
color of the box to be swapped between the 2 colors using the
command gui.setvalue (example for a squared led).
By default color2 is black
gui.Circle
Cir1
= GUI.Circle(x, y, radius, color1 [,color2])
The circle has by default a unique color with
a white frame around.
The optional parameter ‘frame_color” defines
the color of the frame.
The optional parameter ‘color2’ allows the
color of the circle to be swapped between the 2 colors using the
command gui.setvalue (example for a circular led).
By default color2 is black.
gui.Rect
Rect1
= GUI.Rect(x, y, width, height, color,[,color2])
The optional parameter ‘color2’ allows the
color of the circle to be swapped between the 2 colors using the
command gui.setvalue (example for a circular led).
By default color2 is black.
This draws a simple rectangle.
gui.Line
Line1
= GUI.Line (x1, y1 x2, y2, color)
This draws a simple line.
GUI Functions
gui.GetValue
Value
= GUI.GetValue(obj)
Returns the current value from any object.
Works for button, Imagebutton, checkbox,
slider, ….
gui.Target
Id
= GUI.Target
Returns the ID of the object that generated
the event.
Useful for having a common event handler
routine for several objects.
GUI Commands
gui.INIT
Gui.Init nb_elements
[, back_color]
Initialise the graphical GUI interface.
Nb_elements define how many graphical elements
can be defined.
This is just for memory reasons, if more
objects are defined, they will be ignored.
Back_color defines the background color (by
default is black).
gui.REDRAW
Gui.Redraw
Redraw all the content of the GUI.
All the objects will be redrawn, even those
that have not changed since the last refresh.
gui.REFRESH
Gui.Refresh
[touch]
Refresh the content of the GUI.
If ‘touch’ is 1, the touchscreen will also be
refreshed. This is useful if the module doesn’t have a touchscreen
(like the m5stack).
gui.AUTOREFRESH
Gui.AutoRefresh interval
[, touch]
Refresh the content of the GUI at regular
intervals.
‘Interval’ defines the time interval in
milliseconds.
If ‘touch’ is 1, the touchscreen will also be
refreshed. This is useful if the module doesn’t have a touchscreen
(like the m5stack).
gui.SETVALUE
Gui.SetValue object,
value [, no_event]
Set the value for any valid object.
If no_event
is 1, the event associated with the object will not be raised
gui.SETTEXT
Gui.SetText object,
text$
Set the text for textline and for buttons.
gui.SETIMAGE
Gui.SetImage object,
image1$ [,image2$]
Defines the image(s) for the IMAGE object and
the ImageButton Object.
gui.SETCOLOR
Gui.SetColor object,
col1 [,col2 [,col3 [,col4]]]
Set the colors for all the objects.
This command is valid for all the objects, but
the syntax is different for each object.
The detail is :
Object
|
Format
|
TextLine
|
Gui.SetColor object,
color_text [,color_back
[,color_frame]]
|
Button
|
Gui.SetColor object,
color_text [,color_pressed
[,color_released [,color_frame]]]
|
Checkbox
|
Gui.SetColor object,
color_set [, color_back
[, color_frame]]
|
ProgressBar
|
Gui.SetColor object,
color_set [, color_back
[, color_frame]]
|
Slider
|
Gui.SetColor object,
color_cursor [, color_back
[, color_frame [, color_ticks]]]
|
Gauge
|
Gui.SetColor object,
color_needle [, color_back
[, color_frame [, color_ticks]]]
|
Box
|
Gui.SetColor object,
color_set [, color_back
[, color_frame [, color_released]]]
|
Circle
|
Gui.SetColor object,
color_set [, color_back
[, color_frame [, color_released]]]
|
Rectangle
|
Gui.SetColor object,
color
|
Line
|
Gui.SetColor object,
color
|
Image
|
Gui.SetColor object,
color_back ( this works
only with bmp with transparency)
|
ButtonImage
|
Gui.SetColor object,
color_back1, color_back2
|
gui.SETRANGE
Gui.SetRange object,
value_mini, value_maxi
Define the range for the slider, the
progressbar, the ramp and the gauge.
gui.SETEVENT
Gui.SetEvent object,
event_type [, label]
Define an event for any object.
Event
|
Value
|
Meaning
|
NONE
|
0
|
Disable the event
|
TOUCH
|
1
|
Triggered when touching on the object
|
LEAVE
|
2
|
Triggered when leaving the touch from the object
|
CHANGE
|
3
|
Triggered when the value of the object changes
|
Label is the place where it will jump; it is
not required if the event is NONE.
The events can be defined for button,
checkbox, slider, image and imagebutton.
ID
= Gui.Target
Returns the ID of the object that generated
the event.
Useful for having a common event handler
routine for several objects
gui.SETSTYLE
Set the style for all the objects.
This command is valid for all the objects, but
the syntax is different for each object.
The detail is :
Object
|
Format
|
Slider
|
Gui.SetStyle object,
size_cursor [, number_of_ticks
[, tick_length]]
|
Gauge
|
Gui.SetStyle object,
needle_length [,
needle_width [,
number_of_ticks [,
tick_length]]]
|
TextLine
|
Gui.SetStyle object,
alignment [,
text_margin]
|
alignment
can be :
Keyword
|
Value
|
Alignement
|
ALIGN_TOP_LEFT
|
0
|
Top left
|
ALIGN_TOP_MID
|
1
|
Middle of
top
|
ALIGN_TOP_RIGHT
|
2
|
Top right
|
ALIGN_MID_LEFT
|
3
|
Middle of left
side
|
ALIGN_MID_MID
|
4
|
Center
|
ALIGN_MID_RIGHT
|
5
|
Middle of the
right side
|
ALIGN_BOT_LEFT
|
6
|
Bottom left
|
ALIGN_BOT_MID
|
7
|
Middle of
bottom
|
ALIGN_BOT_RIGHT
|
8
|
Bottom
right
|
Text_margin defines the margin in pixels.
INFRARED
INTERFACE
An infrared receiver can be connected to the
module permitting to decode messages received from RC remote
controllers.
It is also possible to connect an IR led
permitting to generate RC codes from the module.
This picture shows a kit containing an IR
receiver, an IR LED and a controller available on ebay at around
1€.
The following drawing shows an example of
connection using the pins GPIO12 and GPIO13:
Details of wiring for the VS1838B
There are several commands associated with the
IR functions :
IR.INIT,
IR.GET$,
IR.SEND and
ONINFRARED.
In order to use the Infrared functions, the
first command to use is IR.INIT.
This command defines the pins to be used for
the IR receiver and the IR transmitter.
As per the wiring given above, the command
must be:
IR.INIT 13,
12
The command
ONINFRARED defines the label where the program will jump
when a code is received by the Infrared receiver. Then, using the
function
IR.GET$ it will be possible to retrieve the code of the
message received:
Example
IR.INIT
13,
12
ONINFRARED
irReceived
Wait
irReceived:
PRINT
IR.GET$
RETURN
|
The transmission can be done using the command
IR.SEND:
The format is
IR.SEND format,
code$, bits
Example for a NEC code:
IR.SEND 3,
"20DF40BF", 32
The following formats are supported for the
reception and the transmission :
VALUE
|
FORMAT
|
-1
|
UNKNOWN
|
0
|
UNUSED
|
1
|
RC5
|
2
|
RC6
|
3
|
NEC
|
4
|
SONY
|
5
|
PANASONIC
|
6
|
JVC
|
7
|
SAMSUNG
|
This is an example working with the RC
controller shown in the picture above.
It shows the status of the button 1 to 8
pressed on the web page and can control 8 leds wired to a PCF8574
using the I2C bus :
oninfrared
irReceived
onHtmlReload
mypage
l1
= 0: l2 = 0: l3=0:
l4=0: l5=0: l6=0:
l7=0: l8=0
ir.init
13
i2c.setup
21,
22
l
= 0
PCF8574_write
l
gosub
mypage
wait
irReceived:
print
ir.get$, ir.get$(1),
ir.get$(2),
val("&h"
+ ir.get$(3)),
ir.get$(4),
ir.get$(5)
code_type
= val(ir.get$(1))
address
= val(ir.get$(2))
cmd
= val("&h"
+ ir.get$(3))
' if NEC
CODE
if
code_type
= 3 then
' if RC address is
0
if address = 0 then
if cmd = 22 then l
= l xor 1
if cmd = 25 then l
= l xor 2
if cmd = 13 then l
= l xor 4
if cmd = 12 then l
= l xor 8
if cmd = 24 then l
= l xor 16
if cmd = 94 then l
= l xor 32
if cmd = 8 then l = l
xor 64
if cmd = 28 then l
= l xor 128
PCF8574_write l
setleds l
end if
end
if
return
mypage:
cls
a$
= ""
a$
= a$ + |<h1> TEST
OF IR REMOTE CONTROLLER COUPLED<br>|
a$
= a$ + | WITH AN I2C
PCF8574 AND 8 LEDS</h1>|
a$
= a$ + led$(l1)
+ led$(l2)
+ led$(l3)
+ led$(l4)
+ led$(l5)
+ led$(l6)
+ led$(l7)
+ led$(l8)
html
a$
return
sub
setleds(x)
' set the status for the
leds
l1
= (x and
1)
l2
= (x and
2)
l3
= (x and
4)
l4
= (x and
8)
l5
= (x and
16)
l6
= (x and
32)
l7
= (x and
64)
l8
= (x and
128)
refresh
end
sub
sub
PCF8574_write(x)
i2c.begin 32 'PCF8574
i2c.write x
i2c.end
end
sub
|
An Ultrasonic distance sensor HC-SR04 can be
connected to the module.
This sensor permits to measure the distance
from a target positioned in front in a range going from a minimum
of 3 cm to a maximum of 3 meters.
For the connection, it requires 2 pins plus
the power supply. (5 Volts).
The only function is
DISTANCE(pin_trig,
pin_echo) which returns the distance from the target in
cm.
Example:
' Measure
the distance from the target 2 times / second
print
"DISTANCE MEASUREMENT"
for
i
= 0 to 1000
print str$(DISTANCE(15,12),
"%4f") +
"cm"
pause 500
next
i
end
|
A Temperature / Humidity sensor of the DHTxx
family can be connected.
The picture below shows the ones that are
currently supported.
These sensors requires a single wire
connection like shown below:
[34]
To use them is very simple.
First initialise the sensor with the command
DHT.SETUP pin,
model
The pin can be any available pin of the
device, and model can be 11, 21 or 22 (for DHT11, DHT21 or
DHT22).
Assuming that we are using the DHT22 on the
pin GPIO2, the command must be :
DHT.SETUP 2,
22
Then 3 functions are available :
DHT.TEMP
DHT.HUM
DHT.HEATINDEX
The first returns the value of the temperature
in °C
The 2nd returns the value of the Humidity in
%
The 3rd returns the value of the heat index in
°C
.
Example
DHT.SETUP
2
,22
Print
"The Temperature is "; DHT.TEMP ; "°C"
Print
"The Humidity is "; DHT.HUM ; "%"
Print
"The Heat Index is "; DHT.TEMP ; "°C"
|
DS18B20
Temperature Sensors
One or several DS18B20 Temperature
sensors can be connected.
The picture below shows the ones that are
currently supported.
These Dallas 1-wire sensors use a single wire
connection as shown below, allowing multiple sensors to be
connected in parallel on the same 1-wire bus from a single gpio
pin.
There is just one function available :
TEMPR$(pin_number,
[ID])
This function will return the temperature or
the ID of the device depending on the parameter ‘ID’ specified.
In the schematic above, to read the 3
temperatures, the example code is :
Print
"The Temperature 1 is ";TEMPR$(2,
1) ; "°C"
Print
"The Temperature 2 is ";TEMPR$(2,
2) ; "°C"
Print
"The Temperature 3 is ";TEMPR$(2,
3) ; "°C"
|
BNO055 Absolute Orientation
Sensor
A BNO055 Absolute Orientation Sensor can be
connected to the module using I2C interface.
This sensor contains 3 accelerometers, 3 gyros
and 3 magnetometers BUT contains also an integrated 32 bits
controller running Bosch Sensortec sensor fusion software.
This permits to unload the module from all the
calculations related to the implementation of a Fusion
algorithm.
This component is quite expensive ( ~10 €)
compared to the classic MPU6050, MPU9250, ... but the quality of
the internal fusion algo permits to use it without any effort.
Before connecting it, the links S0 and S1 must
be soldered with the ‘-’ position as shown in the picture, to
enable I2C.
The connection is very simple, just 2 pins for
the I2C bus and the power supply are required.
The module is already provided with on-board
pull-up resistors, so external pull-up resistors are not
required.
Available instructions are :
BNO055.SETUP(address)
BNO055.HEADING
BNO055.PITCH
BNO055.ROLL
BNO055.VECTOR ( param )
BNO055.CALIB [(param)]
The use of the BNO055 module is very
simple.
First the I2C must be initialised with the
command
I2C.SETUP.
Then the module must be initialised with the
function
BNO055.SETUP(address).
‘address’ must be &h28 if the pin ‘I2C’ is
connected to GND or &h29 if connected to VCC.
This function returns 1 if the module has been
initialised properly otherwise it returns 0.
After the initialisation, the euler angles can
be simply read using the corresponding functions
BNO055.HEADING,
BNO055.PITCH and
BNO055.ROLL
Another useful function is
BNO055.CALIB
[(param)]
which returns the calibration status of the BNO055 internal
sensors.
If used without any parameters it returns 1
when all the internal sensors are calibrated, otherwise it returns
0.
The BNO055 is put in auto calibration mode so
it will calibrate by itself in the background.
Refer to the following link for more
information :
BNO055 Calibration
Example
I2C.SETUP 21, 22
' set I2C port on pins 21 and 22
if bno055.setup(&h28) = 0
then
print "BNO module not found"
end
end if
for z = 1 to
1000
print "Pitch:", bno055.pitch
print "Roll:", bno055.roll
print
"Heading:", bno055.heading
print
"Calibrated:", bno055.calib
pause 100
next z
end
|
BME280 Combined humidity and
pressure sensor
A BME280 Sensor can be connected to the module
using the I2C interface.
The BME280 combines individual high linearity,
high accuracy sensors for pressure, humidity and temperature.
The cheaper BMP280 could be used instead, but it doesn’t
contain a humidity sensor.
The connection is very simple, just 2 pins for
the I2C bus and the power supply are required.
The module is already provided with on-board
pull-up resistors, so external pull-up resistors are not
required.
Available instructions are :
BME280.SETUP(address)
BME280.ALT(qnh)
BME280.HUM
BME280.QFE
BME280.QNH(altitude)
BME280.TEMP
The use of the BME280 module is very
simple.
First the I2C must be initialised with the
command
I2C.SETUP.
Then the module must be initialised with the
function
BME280.SETUP(address).
‘address’ must be &h76 if the pin ‘SDO’ is
connected to GND or &h77 if connected to VCC.
This function returns 1 if the module has been
initialised properly, otherwise it returns 0.
After the initialisation, the temperature,
pressure and humidity can be simply read using the corresponding
functions
BME280.TEMP,
BME280.QFE and
BME280.HUM.
The function
BME280.ALT(qnh)
returns the altitude information but requires, as a parameter, the
pressure at sea level.
At the opposite, the function
BME280.QNH(altitude)
returns the sea level pressure but requires, as a parameter, the
current altitude.
Example
I2C.SETUP 21,
22 ' set I2C
port on pins 21 and 22
if bme280.setup(&h76)
= 0 then print
"BME280 not found" :
end
for z = 1 to
1000
print "Temperature", bme280.temp
print "Humidity", bme280.hum
print "Pressure", bme280.qfe
qnh = bme280.qnh(150)
' assume the altitude at 150
meters
print "Qnh ", qnh
print "Altitude", bme280.alt(1019)
' assume a sea level pressure at 1019
Hpa
pause 100
next z
|
APDS9960 Digital Proximity, Ambient
Light, RGB and Gesture Sensor
An APDS9960 Sensor can be connected to the
module using the I2C interface.
The APDS-9960 device features advanced Gesture
detection, Proximity detection, Digital Ambient Light Sense (ALS)
and Color Sense (RGBC).
Gesture detection utilises four directional
photodiodes to sense reflected IR energy (sourced by the integrated
LED) to convert physical motion information (i.e. direction and
distance) into digital information.
The connection is very simple, just 2 pins for
the I2C bus and the power supply are required.
The module is already provided with on-board
pull-up resistors, so external pull-up resistors are not
required.
Available functions are :
APDS9960.SETUP(mode)
APDS9960.READGESTURE
APDS9960.AMBIENT
APDS9960.RED
APDS9960.GREEN
APDS9960.BLUE
APDS9960.PROXIMITY
APDS9960.GESTUREGAIN
APDS9960.GESTURELED
There is also an
associated
ONGESTURE event.
The use of the
APDS9960 module is quite simple.
First the I2C must be
initialised with the command
I2C.SETUP.
Then the module must be initialised with the
function
APDS9960.SETUP(mode).
“mode”
must be 1 for “GESTURE” mode.
As soon as a gesture is recognised, the event
ONGESTURE is triggered, so it is then possible to get
the recognised gesture with the function
APDS9960.READGESTURE
Example
'APDS9960
GESTURE SENSOR DEMO
i2c.setup 21,22
'set the sensor in GESTURE
mode
if apds9960.Setup(1)
= 0 then print
"APDS9960 not found" :
end
'define the Gesture event
ongesture gesture
'Wait for the event
wait
gesture:
r = apds9960.ReadGesture
select case r
case 1
print
"LEFT"
case 2
print
"RIGHT"
case 3
print
"UP"
case 4
print
"DOWN"
case 5
print
"NEAR"
case 6
print
"FAR"
case else
print
"none"
end select
return
|
The module can also be configured as an
Ambient & RGB light sensor.
In this case “mode”
must be 2 for “Ambient Light and RGB Color” mode.
Example
'APDS9960
LIGHT SENSOR DEMO
i2c.setup 21,22
'set the sensor in Ambient
light and RGB Color mode if
apds9960.Setup(2)
= 0 then print
"APDS9960 not found" :
end
for z = 1 to 10000
print "Light:",
apds9960.ambient, apds9960.red, apds9960.green, apds9960.blue
pause 100
next z
end
|
The module can, finally, be configured also as
a Proximity sensor.
In this case “mode”
must be 3 for “Proximity” mode.
Example
'APDS9960
PROXIMITY SENSOR DEMO
i2c.setup 21,22
'set the sensor in Proximity
mode if apds9960.Setup(3)
= 0 then print
"APDS9960 not found" :
end
for z = 1 to 10000
print "Distance:", apds9960.proximity
pause 100
next z
end
|
RFID MFRC522 RFID cards reader
A RFID card/key reader module based on the
chipset MFRC522 can be connected to the module using the SPI
Interface. These modules are very cheap and available on Ebay at
less than 2€.
These modules enable to read/write these kind
of devices, also easily available and very cheap
These devices are based on a chip manufactured
by NXP (MIFARE 1K) that contains 1KBytes of memory.
Each device has a 4 bytes identifier (NUID)
that is unique and cannot be modified.
For this reason this NUID is normally used as
a simple way to identify the device.
For more secured applications, personal data
can be written on the device and secured using passwords.
For more information, there is a nice article
on that subject here and the datasheet of the card
here
Annex implements all the functions permitting
reading and writing these devices.
The module must be connected using the SPI bus
as below:
The pin RST can be eventually left unconnected
or put to +3.3V.
To start using the module, it must be setup
using the function
RFID.SETUP(CS_pin,
RST_pin)
Example:
ret
=
RFID.SETUP(15,
0)
Note: if the RST pin is left unconnected, it
can be replaced by -1
in the function
This function returns a value following the
table below :
VALUE
|
REASON
|
0
|
Failed
|
18
|
Counterfeit chip
|
136
|
Clone
|
144
|
Version 0.0
|
145
|
Version 1.0
|
146
|
Version 2.0
|
255
|
Failed
|
Then it is possible to set the gain
(sensitivity) of the module with the function
RFID.SETGAIN(gain)
By default the gain is 4 and can range from 0
(minimum) to 7 (maximum)
Example:
ret
=
RFID.SETGAIN(7)
This function returns the value set or another
value in case of error.
Another event,
ONRFID , has been included to determine when a device is
detected.
All the actions related to the card (read /
write), must be done inside this event
Example
ONRFID card_detected
When this event occurs, the following
functions are available :
RFID.NUID$ that returns the NUID of the card detected
(ex. CD788821)
Example:
nuid$
= RFID.NUID$
RFID.TYPE$ that returns the type (model) of the card
detected (typically MIFARE
1KB )
Example:
type$
= RFID.TYPE$
It can return any of the following values:
TYPE
|
PICC
compliant with ISO/IEC 14443-4
|
PICC
compliant with ISO/IEC 18092 (NFC)
|
MIFARE Mini, 320 bytes
|
MIFARE 1KB
|
MIFARE 4KB
|
MIFARE Ultralight or Ultralight C
|
MIFARE Plus
|
MIFARE DESFire
|
MIFARE TNP3XXX
|
SAK
indicates UID is not complete.
|
Unknown type
|
Example:
'MRFC522
RFID CARD READER DEMO
print
"Setup", hex$(rfid.setup(15, 0))
print
"SetGain", rfid.setgain(7)
'define the RFID event
ONRFID card_detected
wait
card_detected:
print
"card detected"
print
"Type", rfid.type$
print
"NUID", rfid.nuid$
return
|
In addition to the function described above,
there are also other “advanced” functions.
These enable you to read and write sectors on
the card.
Each sector is 16 bytes long and the card
(MIFARE 1K) contains 64 sectors.
To note that :
-
The sector 0 is read only as it contains the NUID that cannot be
changed
-
The sector 3, 7, 11, 15, 19, 23, 27, 31, 35, 39, 43, 47, 51, 55,
59, 63 have a special function and should not be written; in
particular they contain the passwords.
-
Writing and reading to the card requires a password (6 bytes) that,
by default, is set to FFFFFFFFFFFF; this must be known and
cannot be extracted from the card.
-
So the first “advanced” function is
RFID.SETKEY that permit to define another password if
the card doesn’t use the default FFFFFFFFFFFF
Example:
ret
=
RFID.SETKEY("A1B2C3D4E5F6")
The function returns 1 if OK or 0 in case of
non valid password
Then, the function
RFID.READ$(block)
can be used to read a block of 16 bytes.
The result will be a string like
“010102030405060708090A0B0C0D0E0F” or a message indicating
that an error is occurred :
MESSAGE
|
REASON
|
Auth
Failed
|
Error
during the authorisation phase.
Probably the password is not valid
|
Read
Failed
|
Error
during the reading phase.
Probably the card has been moved too far from the reader
|
Last function is
RFID.WRITE(block,
data$) that can be
used to write a block of 16 bytes.
block
must be a number from 0 to 63 and data$
a string like “010102030405060708090A0B0C0D0E0F”
The function returns the following error
values:
MESSAGE
|
REASON
|
0
|
No
error
|
1
|
Error
during the authorisation phase.
Probably the password is not valid
|
2
|
Error
during the writing phase.
Probably trying to write into a read only block or the content to
be written is not valid
|
Writing NUID for UID
changeable card (4 byte UID version)
In general, the standard MIFARE RFID modules
have a unique NUID identifier that cannot be changed.
However, there exist some special “chinese”
modules that enable the feature to set an arbitrary NUID.
For that, the special function
RFID.SETNUID(NUID$)
can be used for this purpose where NUID$
represents an 4 bytes hex code
Example:
ret
=
RFID.SETNUID("AABBCCDD")
The function returns 1 if OK or 0 in case of
error
Important : this function works only
for UID changeable cards
VL53L0X TOF (Time Of Flight)
Distance Sensor
The VL53L0X is a new generation Time-of-Flight
(ToF) laser-ranging module providing accurate distance measurement
whatever the target reflectances unlike conventional technologies.
It can measure absolute distances up to 2m, setting a new benchmark
in ranging performance levels, opening the door to various new
applications.
It must connected using I2C using
the wiring as shown below :
To start to use, it must be initialised using
the
VL53L0X.INIT function.
The syntax is:
Ret
=
VL53L0X.INIT
It returns 1 if the initialisation was
successful or 0 if not OK.
Then, the following commands are available
:
VL53L0X.SETRANGE range
Set the distance range (sensitivity); by
default the value is 0 for a max range of 600 mm
VL53L0X.SETRANGE
|
Range (mm)
|
0 ( default)
|
~ 600
|
1
|
~ 2000
|
VL53L0X.SETACCURACY accuracy
Set the accuracy of the readout modifying the
time required for the measurement.
By default the value is 0 for a Measurement
time of 33 msec.
VL53L0X.SETACCURACY
|
Measurement time (msec)
|
0 ( default)
|
33
|
1
|
200
|
2
|
400
|
Finally it is possible to read the distance
using the function
Dist
=
VL53L0X.DISTANCE
The value returned is the distance measured in
millimeters.
If the measurement is not valid, for example
if the distance is out of range, this function returns
8190.
This is a “blocking” function meaning that the
program will stop during the time required for the measurement,
i.e. 400 ms when using the accuracy at 2.
For this reason the alternative function
VL53L0X.DISTANCE_N returns the same information but
without blocking the execution of the code.
Obviously, the distance measured will be
“refreshed” only at the rate defined with the function
VL53L0X.SETACCURACY
Example:
' VL53L0X example program
print
VL53L0X.init
' will print 1 if the device has been found
VL53L0X.SetAccuracy 2
' set the refresh rate at 400 msec (max
accuracy)
VL53L0X.SetRange 1
' set the range at 2000 mm ( 2 meters
)
for z
= 1 to 100000
print
VL53L0X.Distance
' get the distance
next z
|
MPU9250
The MPU-9250 is a 9-DOF System in Package
(SiP) that combines two chips: the MPU-6500, which contains a
3-axis gyroscope as well as a 3-axis accelerometer, and the AK8963,
which features a 3-axis magnetometer.
It also contains a temperature sensor.
It must be connected using I2C wiring.
For that the I2C must be initialised before
using the command
I2C.Setup
21,22, 400000
'400000 set the I2C to max speed
To start to use, it must be initialised using
theMPU9250.SETUP
function.
The syntax is:
Ret
=MPU9250.SETUP(address)
‘Address’ can be &h68 or &h69
depending on the wiring of the MPU9250.
The address depends on the voltage applied to
the pin AD0 :
LEVEL ON PIN
AD0
|
ADDRESS
(HEXADECIMAL)
|
GND or open
|
68
|
VCC
|
69
|
It returns 1 if the initialisation was
successful, or 0 if not OK.
The chip temperature can then be read using
the function
Ret
=
MPU9250.TEMP
Example:
Print MPU9250.TEMP
Then all the chip values can then be read
using the function
Ret
=
MPU9250.VECTOR(array())
Using an array guarantees that all the data
received will be synchronised with each other as read at the same
time.
The function returns 1 if the action was
successful; otherwise 0.
NOTE: The array must be defined before
with the command DIM with a minimum size of 10
The variables are read in a one-shoot
operation, as per the table below:
INDEX
|
PARAMETER
|
UNITS
|
0
|
Accelerometer X
axis
|
m/sec2
|
1
|
Accelerometer Y
axis
|
2
|
Accelerometer Z
axis
|
3
|
Gyroscope X
axis
|
deg / sec
|
4
|
Gyroscope Y
axis
|
5
|
Gyroscope Z
axis
|
6
|
Magnetometer X
axis
|
micro tesla
|
7
|
Magnetometer Y
axis
|
8
|
Magnetometer Z
axis
|
Example:
I2C.Setup 21,22,
400000 '400000 set the I2C to max
speed
if
MPU9250.Setup(&h68)
= 0 then print
"MPU9250 not found" :
end
Print
"Temperature", MPU9250.TEMP ; "°C"
Dim vect(10)
'dimension the
array
'read the values for all the axis
Ret
= MPU9250.VECTOR(vect())
'Print all the values
Print
"ax "; vect(0), "ay ";
vect(1), "az ";
vect(2)
Print
"gx "; vect(3), "gy ";
vect(4), "az ";
vect(5)
Print
"mx "; vect(6), "my ";
vect(7), "mz ";
vect(8)
|
It must be noted that, because of the
different internal orientation of the MPU6500 part and the AK8963,
the axis of the magnetometers are not aligned with the
accelerometers and the gyros.
However, this has been taken into account
so this function will always return the correct values.
The MPU9250 can be straightly connected with
the IMU Fusion functions (see below) enabling it to compute, in a
single operation, all the orientation angles (pitch, roll and
yaw).
The Madgwick algorithm can be run using the
following functions :
Ret
= MPU9250.MADGWICK
This function reads all the values from the
MPU9250 and processes them using the Madgwick algorithm.
The result can then be read using
FUSION.PITCH,FUSION.ROLL
and
FUSION.YAW.
In the same way, the Mahony algorithm can be
run using the following functions :
Ret
= MPU9250.MAHONY
This function reads all the values from the
MPU9250 and processes them using the Mahony algorithm.
The result can then be read using
FUSION.PITCH,FUSION.ROLL
and
FUSION.YAW.
Note: The FUSION must be initialised
before using the command
FUSION.INIT
Example:
I2C.Setup 21,22,
400000 '400000 set the I2C to max
speed
if
MPU9250.Setup(&h68)
= 0 then print
"MPU9250 not found" :
end
Print
"Temperature", MPU9250.TEMP ; "°C"
FUSION.Init
' initialise the fusion algorithms
while 1
' infinite loop
a
= MPU9250.Madgwick 'runs the Madgwick algo
Print FUSION.Pitch, FUSION.Roll, FUSION.Yaw 'prints the result
wend
|
MPU6500 / MPU6050
The MPU-6500 is a 6-DOF MotionTracking device
that combines a 3-axis gyroscope and a 3-axis accelerometer in a
small package. It also contains a temperature sensor.
It must be connected using I2C wiring.
For that the I2C must be initialised before
using the command
I2C.Setup
21,22, 400000
'400000 set the I2C to max speed
To start to use, it must be initialised using
theMPU6500.SETUP
function.
The syntax is:
Ret
=MPU6500.SETUP(address)
‘Address’ can be &h68 or &h69
depending on the wiring of the MPU6500.
The address depends on the voltage applied to
the pin AD0 :
LEVEL ON PIN AD0
|
ADDRESS (HEXADECIMAL)
|
GND or open
|
68
|
VCC
|
69
|
It returns 1 if the initialisation was
successful or 0 if not OK.
The chip temperature can then be read using
the function
Ret
=
MPU6500.TEMP
Example:
Print MPU6500.TEMP
Then all the chip values can then be read
using the function
Ret
=
MPU6500.VECTOR(array())
Using an array guarantees that all the data
received will be synchronised with each other as read at the same
time.
The function returns 1 if the action was
successful; otherwise 0.
NOTE: The array must be defined before
with the command DIM with a minimum size of 10
The variables are read in a one-shoot
operation, as per the table below:
INDEX
|
PARAMETER
|
UNITS
|
0
|
Accelerometer X
axis
|
m/sec2
|
1
|
Accelerometer Y
axis
|
2
|
Accelerometer Z
axis
|
3
|
Gyroscope X
axis
|
deg / sec
|
4
|
Gyroscope Y
axis
|
5
|
Gyroscope Z
axis
|
Example:
I2C.Setup 21,22,
400000 '400000 set the I2C to max
speed
if
MPU6500.Setup(&h68)
= 0 then print
"MPU6500 not found" :
end
Print
"Temperature", MPU6500.TEMP ; "°C"
Dim vect(10)
'dimension the
array
'read the values for all the axis
Ret
= MPU6500.VECTOR(vect())
'Print all the values
Print
"ax "; vect(0), "ay ";
vect(1), "az ";
vect(2)
Print
"gx "; vect(3), "gy ";
vect(4), "az ";
vect(5)
|
The MPU6886 can be straightly connected with
the IMU Fusion functions (see below) enabling it to compute, in a
single operation, all the orientation angles (pitch, roll and
yaw).
The Madgwick algorithm can be run using the
following functions :
Ret
= MPU6500.MADGWICK
This function reads all the values from the
MPU6500 and processes them using the Madgwick algorithm.
The result can then be read using
FUSION.PITCH,FUSION.ROLL
and
FUSION.YAW.
In the same way, the Mahony algorithm can be
run using the following functions :
Ret
= MPU6500.MAHONY
This function reads all the values from the
MPU6500 and processes them using the Mahony algorithm.
The result can then be read using
FUSION.PITCH,FUSION.ROLL
and
FUSION.YAW.
Note: The FUSION must be initialised
before using the command
FUSION.INIT
Example:
I2C.Setup 21,22,
400000 '400000 set the I2C to max
speed
if
MPU6500.Setup(&h68)
= 0 then print
"MPU6500 not found" :
end
Print
"Temperature", MPU6500.TEMP ; "°C"
FUSION.Init
' initialise the fusion algorithms
while 1
' infinite loop
a
= MPU6500.Madgwick 'runs the Madgwick algo
Print FUSION.Pitch, FUSION.Roll, FUSION.Yaw 'prints the result
wend
|
Note: As this IMU does not contain a
magnetometer, you will experience yaw drift over an extended period
of time. This is unavoidable and a limitation of the
technology.
MPU6886 (For M5 Atom)
The MPU-6886 is a 6-DOF MotionTracking device
that combines a 3-axis gyroscope and a 3-axis accelerometer in a
small package. It also contains a temperature sensor.
This is in particular installed inside the
M5Stack Atom Matrix using an internal I2C bus (pin 21 and 25).
For this reason it is not required to
initialise the I2C bus as it will be done automatically.
To start to use, it must be initialised using
theMPU6886.SETUP
function.
The syntax is:
Ret
=MPU6886.SETUP
The address is set automatically to HEX 68 so
it is not required
It returns 1 if the initialisation was
successful or 0 if not OK.
The chip temperature can then be read using
the function
Ret
=
MPU6886.TEMP
Example:
Print MPU6886.TEMP
Then all the chip values can be read using the
function
Ret
=
MPU6886.VECTOR(array())
Using an array guarantees that all the data
received will be synchronised with each other as read at the same
time.
The function returns 1 if the action was
successful; otherwise 0.
NOTE: The array must be defined before
with the command DIM with a minimum size of 10
The variables are read in a one-shoot
operation, as per the table below:
INDEX
|
PARAMETER
|
UNITS
|
0
|
Accelerometer X
axis
|
m/sec2
|
1
|
Accelerometer Y
axis
|
2
|
Accelerometer Z
axis
|
3
|
Gyroscope X
axis
|
deg / sec
|
4
|
Gyroscope Y
axis
|
5
|
Gyroscope Z
axis
|
Example:
if
MPU6886.Setup = 0
then print "MPU6686 not
found" : end
Print
"Temperature", MPU6886.TEMP ; "°C"
Dim vect(10)
'dimension the
array
'read the values for all the axis
Ret
= MPU6886.VECTOR(vect())
'Print all the values
Print
"ax "; vect(0), "ay ";
vect(1), "az ";
vect(2)
Print
"gx "; vect(3), "gy ";
vect(4), "az ";
vect(5)
|
The MPU6886 can be straightly connected with
the IMU Fusion functions (see below) enabling it to compute, in a
single operation, all the orientation angles (pitch, roll and
yaw).
The Madgwick algorithm can be run using the
following function :
Ret
= MPU6886.MADGWICK
This function reads all the values from the
MPU6886 and processes them using the Madgwick algorithm.
The result can then be read using
FUSION.PITCH,FUSION.ROLL
and
FUSION.YAW.
In the same way, the Mahony algorithm can be
run using the following functions :
Ret
= MPU6886.MAHONY
This function reads all the values from the
MPU6886 and processes them using the Mahony algorithm.
The result can then be read using
FUSION.PITCH,FUSION.ROLL
and
FUSION.YAW.
Note: The FUSION must be initialised
before using the command
FUSION.INIT
Example:
if
MPU6886.Setup = 0
then print "MPU6686 not
found" : end
Print
"Temperature", MPU6886.TEMP ; "°C"
FUSION.Init
' initialise the fusion algorithms
while 1
' infinite loop
a
= MPU6886.Madgwick 'runs the Madgwick algo
Print FUSION.Pitch, FUSION.Roll, FUSION.Yaw 'prints the result
wend
|
Note: As this IMU does not contain a
magnetometer, you will experience yaw drift over an extended period
of time. This is unavoidable and a limitation of the
technology.
IMU FUSION FUNCTIONS
Annex includes 2 fusion algorithms designed to
provide pitch, roll and yaw orientation from data coming from IMUs
like the MPU9250.
The 2 algorithms are Madgwick and Mahony.
Both are provided in 2 forms, with 6-DOF and
9-DOF..
To start, the algos must be initialised with
the command
FUSION.INIT
Then the different algos can be called as
below :
For the 6-DOF Madgwick:
FUSION.MADGWICK ax, ay,
az, gx, gy, gz
For the 9-DOF Madgwick:
FUSION.MADGWICK ax, ay,
az, gx, gy, gz, mx, my, mz
For the 6-DOF Mahony:
FUSION.MAHONY ax, ay,
az, gx, gy, gz
For the 9-DOF Mahony:
FUSION.MAHONY ax, ay,
az, gx, gy, gz, mx, my, mz
The angles can be read using the function
FUSION.ANGLE(axis)
following the table below:
AXIS
|
RETURNED INFORMATION
|
UNIT
|
1
|
PITCH
|
°
|
2
|
ROLL
|
°
|
3
|
YAW
|
°
|
In a simpler way,
it is also possible to read the values using the functions :
Pitch
= FUSION.PITCH
Roll
= FUSION.ROLL
Yaw
= FUSION.YAW
The 2 algos can be
tuned using the following coefficients :
For Madgwick :
FUSION.BETA
=
0.6
'
default value 0.6
FUSION.ZETA
=
0.6
'
default value 0.6 - only for 6-DOF algo
For Mahony:
FUSION.Kp
=
2
' proportional feedback default value
2
FUSION.Ki
=
0
' integral
feedback default value 0
Example with the MPU9250 and a Madgwick
algo:
I2C.Setup 21,22,
400000 '400000 set the I2C to max
speed
'initialise the MPU9250 with address hex 68
if
MPU9250.Setup(&h68)
= 0 then print
"MPU9250 not found" :
end
FUSION.Init
' initialise the fusion algorithms
FUSION.Beta
= 0.6 'set beta parameter to
0.6
Dim p(10)
'dimension the
array
while 1
' infinite loop
i = MPU9250.vector(p())
'read the values for all the
axis
'note: the syros must be converted to
RAD/sec
FUSION.Madgwick p(0),
p(1), p(2),
(p(3)
* PI/180),
(p(4)*
Pi/180),
(p(5)
* Pi/180),
p(6), p(7),
p(8)
Print FUSION.Pitch, FUSION.Roll, FUSION.Yaw 'prints the result
wend
|
ETHERNET Module W5500
An Ethernet module based on the chipset WIZnet
W5500 can be connected to the module using SPI interface.
These modules are very cheap and available on
Ebay at less than 5€.
This picture shows 2 modules based on this
chipset which have been successfully tested with Annex32.
This schematic shows how to connect the W5500
module to the ESP32 module.
This module permits to connect the ESP32 to
the network using a wired connection.
Annex32 implements the functionalities to send
and receive TCP and UDP packets.
It can be used in ADDITION to the existing
WI-FI functionalities, as it exposes all the functionalities
permitting to communicate with other modules / web services.
However, Annex32 cannot be administered
through this connection, administration must continue to be done
using Wi-Fi.
The actual implementation introduces a new
keyword, ETHERNET, which is used as the prefix for all the commands
/ functions related to it.
For simplicity, all the commands / functions
replicate the same existing Wi-Fi functionality.
For example Ethernet.wget$ is the equivalent
of wget$, Ethernet.IP$ is the equivalent of IP$, etc.
a = ETHERNET.init( cs_pin [ ip, mask, gateway
] ) Initialise the interface, variable
a holds the status result.
If ip, mask, gateway are not defined, the
module will request a DHCP address from a DHCP server.
DHCP status returns =0 if failed to
receive a DHCP IP, =1 if DHCP IP received successfully,
=2 if using a manually configured fixed IP address, =-1 if
ethernet module not found, =-2 if UTP cable is not connected
a$ = ETHERNET.IP$ returns the IP
address of the module (same format as IP$)
a$ = ETHERNET.WGET$( url, [port] )
same as WGET$ but the syntax has been modified also for the
WGET$
make a GET request on a remote server. The
arguments http_server [, port ]
the format of the url is
[protocol]://web_address:port/path[35]
Example for the same website (all are
valid):
print
ethernet.wget$(“jsonplaceholder.typicode.com/posts”) ‘ use by
default the port 80
print
ethernet.wget$(“http://jsonplaceholder.typicode.com/posts”) ‘
use by default the port 80
print
ethernet.wget$(“jsonplaceholder.typicode.com:80/posts”) ‘
define the the port 80
print
ethernet.wget$(“jsonplaceholder.typicode.com/posts”, 80) ‘
define the the port 80
Another example
print
ethernet.wget$("http://portquiz.net:8080/") ‘ define the port
8080
print ethernet.wget$("http://portquiz.net/",
8080) ‘ define the port 8080
a$ = ETHERNET.WPOST$( url, [ [, port |
payload$] [,port] ] )
make a POST request on a remote server
the arguments http_server [ [, port |
payload$] [,port] ]
the format of the url is
[protocol]://web_address:port
These functions :
ETHERNET.UDP.BEGIN
ETHERNET.UDP.STOP
ETHERNET.UDP.WRITE
ETHERNET.UDP.REPLY
ETHERNET.UDP.READ$ ETHERNET.UDP.REMOTE$
Have the same function and format as the
corresponding wifi versions but are for the ethernet network
WEB SERVER:
ETHERNET.SERVER.BEGIN [port] ‘ start the
ethernet web server on the defined port (by default 80)
ETHERNET.SERVER.STOP ‘ stop the ethernet
web server
ETHERNET.SERVER.GETURL$ ‘ returns the url of
the request done on the server
ETHERNET.SERVER.GETARG$ ‘ returns the arg from
the request (same as
ETHERNET.SERVER.RETURN ret$ [,
content_type$]
‘ permit to return a content to the caller
page
EVENTS:
ONETHERNETUDP label
same event as ONUDP but for the ETHERNET
ONETHERNETURL label
Is triggered when a request is done with any
url
The url can be read with the function
ethernet.server.geturl$ and:
The arguments can be read with the function
ethernet.server.getarg$
FTP
The File
Transfer Protocol (FTP) is a standard network protocol
used for the transfer of computer files
between
a client and server on a computer
network.
Annex implements a
function permitting to send files stored locally to the
remote server.
The function is :
BAS.FTP$
The FTP port is
defined by default at the standard value 21.
To send a file the
command is
res$
= BAS.FTP$(host$, login$, password$, file$,
folder$)
Where :
●
host$
is the address of the FTP server
●
login$
is the login of the account on the FTP server
●
password$
is the password of the account on the FTP server
●
file$
is the file that will be sent
●
folder$
is the folder where the file will be sent
Note :
●
If the remote folder does not
exist, it will be created automatically.
●
in this case make sure you have
the right to create the directories on the FTP
server
If the transmission
was successful, the function returns a message like this:
-
226 Transfer complete (153.536 KB/s).
In case of
problems, the function returns a self explaining messages like this
:
-
550 Can't change directory to
"/newfolder".
-
530 Permission denied
-
-2 File not found
-
…...
Example :
res$
= BAS.FTP$("192.168.1.57", "myLogin", "myPass", "/test.bas", "/")
This is a useful example that permit to backup the module sending
all the local files to the FTP server
' FTP function example revised
' cicciocb 2019
' send all the local files to the remote server
' in the folder /
' The directory structure will be also copied
'starts from the root
d$
= FILE.DIR$("/")
'Then lists all the files
While D$
<> ""
print "I'm sending ", d$
path$ = left$(d$,
instr(-1, d$,
"/")) ' extract the
path
print bas.ftp$(
"192.168.1.57", "robin", "hood", d$, path$)
d$
= FILE.DIR$
Wend
end
|
Server
data requests (GET and POST)
Annex includes the functionality to
request/send data from/to the server using HTTP GET and POST
requests.
The GET is the most common HTTP method,
generally used to request (GET) data from a server but can also be
used to send data to the server.
This is what your web browser does when typing
a url in the address bar.
This method uses the url to include all the
data to be transferred to the server and returns the answer from
the server.
As support, there is a nice site https://jsonplaceholder.typicode.com/
that permits to exercise into issuing GET requests.
For example, http://jsonplaceholder.typicode.com/comments/1
is composed of :
http:// => protocol. By default uses the
port 80.
jsonplaceholder.typicode.com => base
url
/comments/1 => url used to transfer
arguments (comments = 1)
Another way to transfer arguments is using
them after a ? as below:
http://jsonplaceholder.typicode.com/comments?id=1
In this case we transfer the request for
comments with id=1
Another example :
http://jsonplaceholder.typicode.com/comments?id=1&id=4
In this case we transfer the request for
comments with id=1 and id=4.
To note that the arguments are composed of
couples arg=value separated by &
The same requests can be done using an
encrypted protocol, the https:// that uses the port 443 :
https://jsonplaceholder.typicode.com/comments?id=1&id=4
(to note the https://)
The POST method is less used than the GET but
it is the most appropriate to send data to the server.
In contrast to the GET method where the data
are transferred inside the url of the request, the POST method
transfers the data in the body of the message.
Annex implements 3 methods to make HTTP
requests :
-
WGET$(server$, port, [,header])
-
WPOST$(server$, body$, port [,header])
-
WGETASYNC[(]server$, port, [,header][)]
Basically
WGET$ and
WGETASYNC both do the same operation but
WGET$ waits until the server answers whilst
WGETASYNC continues the normal execution of the program
and triggers (asynchronously) an event when the answer arrives
.
Example with
WGET$ :
' do an HTTP GET request
a$
= WGET$("jsonplaceholder.typicode.com/comments?id=1&id=4",
80)
' do an HTTPS GET request
a$
= WGET$("jsonplaceholder.typicode.com/comments?id=1&id=4",
443)
|
To note :
The leading HTTP:// or HTTPS://
must be removed
The protocol is specified using the port
number; by default is HTTP but will be HTTPS if the port is
443.
Example with
WPOST$ :
' do an HTTP POST request
a$
= WPOST$("ptsv2.com/t/annextest/post", "name=Annex&version=1.39",
80)
' check at https://ptsv2.com/t/annextest for the
result
|
To note :
The leading HTTP:// or HTTPS://
must be removed
The protocol is specified using the port
number; by default is HTTP but will be HTTPS if the port is
443.
Example with
WGETASYNC:
ONWGETASYNC
answer_done
' do an HTTPS GET request
WGETASYNC("jsonplaceholder.typicode.com/comments?id=1&id=4",
443)
Wait
answer_done:
Print
WGETRESULT$
Return
|
To note :
The leading HTTP:// or HTTPS://
must be removed
The protocol is specified using the port
number; by default is HTTP but will be HTTPS if the port is
443.
The brackets around
WGETASYNC are optional.
Optionally it is possible to specify an extra
parameter for
WGET$,
WPOST$ and
WGETASYNC.
If this parameter is 1, the server header will
be included in the answer.
This will be helpful for debugging.
Note: if you don’t know what the header
is, just ignore this option.
MQTT
MQTT
stands for MQ Telemetry Transport. It is a publish/subscribe,
extremely simple and lightweight messaging protocol, designed for
constrained devices and low-bandwidth, high-latency or unreliable
networks. The design principles are to minimise network bandwidth
and device resource requirements whilst also attempting to ensure
reliability and some degree of assurance of delivery. These
principles also turn out to make the protocol ideal of the emerging
“machine-to-machine” (M2M) or “Internet of Things” world of
connected devices, and for mobile applications where bandwidth and
battery power are at a premium.
Annex implements the protocol with the
following limitations :
-
It can only publish QoS 0 messages.
-
It can subscribe at QoS 0 or QoS 1.
-
The maximum message size is 256 characters
-
The keepalive interval is set to 15 seconds
-
The client uses MQTT 3.1.1
The following table describes the functions
available.
All the numerical functions return 1 if
successful or 0 if there is a problem.
FUNCTIONS / COMMANDS
|
DESCRIPTION
|
Ret = MQTT.Setup(server$ [,port])
|
Setup the MQTT communications.
Server$ is the MQTT server address
Port is the MQTT port; if not defined defaults
to 1883
|
Ret = MQTT.Connect(login$, pass$ [id$])
|
Connect to the server using the provided login
and password.
Optionally id$ permit to define an arbitrary
ID
|
Ret = MQTT.Connect("", "", [id$])
|
Connect to the server without
identification
Optionally id$ permit to define an arbitrary
ID
|
Ret = MQTT.Disconnect()
|
Disconnects from the MQTT server
|
Ret = MQTT.Publish(topic$, message$)
|
Publish a string message in the specified
topic
|
Ret = MQTT.Subscribe(topic$ [,Qos])
|
Subscribes to messages published to the
specified topic.
Qos can be 0 or 1; if not defined defaults to
0
|
Ret = MQTT.UnSubscribe(topic$)
|
Unsubscribes from the specified topic
|
Ret = MQTT.Connected()
|
Returns the current connection status.
Returns 1 if connected or 0 if
disconnected
|
OnMQTT
label
|
Define a label where the program will jump
when an MQTT message is received
|
Ret$
=
MQTT.Message$
|
Returns the MQTT message received
|
Ret$
=
MQTT.Topic$
|
Returns the MQTT topic received
|
This is an example based on the free MQTT test
server “test.mosquitto.org”.
The program subscribe and send message to the
same “/AnnexTest” topic.
It should print the same messages it sent to
the server.
' MQTT test program
' Using mosquitto test server
print
mqtt.setup("test.mosquitto.org")
print
mqtt.connect("",
"")
' No login / pass required
print
mqtt.subscribe("/AnnexTest")
' subscribe to the topic /AnnexTest
onmqtt
mqtt_msg
for z =
1 to 10
' send messages to the topic /AnnexTest
print
mqtt.publish("/AnnexTest",
"Annex"+str$(z))
pause
100
next z
print
ramfree
wait
' receive messages from the server
mqtt_msg:
print
"TOPIC : ";
mqtt.topic$
print
"MESSAGE: ";
mqtt.message$
return
|
ESP-NOW
ESP-NOW is a fast, connectionless
communication technology featuring short packet transmission.
ESP-NOW is ideal for smart lights, remote
control devices, sensors and other applications.
This is a special protocol developed by
Espressif that enables the ESP8266 / ESP32 modules to
communicate between themselves easily without any specific network
connection (i.e. no router).
The modules (peers) can inter-communicate even
if they are not connected on a common network, the unique
requirement is to share the same Wifi radio channel.
Practically, each peer of the ESP-NOW network
can send a message to any other peers(s) directly and very fast
without establishing a network link before. After sending, it will
be able to know if the message has been received
In the same way, it can also receive a message
from any other peer.
The ESP-NOW is very fast and simple to put in
place but there are the following limitations :
-
The max number of peers is 20
-
The transmitted message size can be max 250 characters
-
For the ESP32 it does not work in STA mode (only in AP+STA mode)
when used in combination with the ESP8266 (works OK between ESP32
only)
The ESP-NOW network does not use TCP/IP, so
uses the peers MAC addresses to communicate instead of IP
addresses.
As Annex is very versatile, a network module
can use its wifi interface for ESP-NOW and for standard routed IP
WiFi networking, so it can communicate with both types of network
modules, allowing it to function as a kind of “Gateway” between
ESP-NOW and routed WiFi.
Each module (peer) holds a list of ‘receivers”
containing the MAC addresses of all the peers that will receive a
message when using the command
EspNow.Write(msg$)
Functions and commands available :
FUNCTIONS / COMMANDS
|
DESCRIPTION
|
Ret
= EspNow.Begin
|
starts the ESP-NOW communications
|
Ret
= EspNow.Stop
|
stops the ESP-NOW communications
|
Ret
= EspNow.Add_Peer(MAC_add$)
|
add a peer (module) to the ‘receiver’ list
|
Ret
= EspNow.Del_Peer
|
delete a peer (module) from the ‘receiver’
list
|
Ret
= EspNow.Write(msg$)
|
write a message to the peers defined in the
list
|
Ret
= EspNow.Write(msg$, MAC_add$)
|
write a message to a specific peer defined by
its MAC address
|
All these functions return a value; a non-zero
value indicates that an error has occurred.
If the returned value is not required, the
functions can be used as commands without reading into a
variable.
Example :
Ret
= EspNow.Write(msg$)
used as function
EspNow.Write msg$
used as command (without brackets)
STRING FUNCTIONS
|
DESCRIPTION
|
Msg$
= EspNow.READ$
|
Read the message received
|
MAC_add$
= ESPNow.REMOTE$
|
Read the MAC address of the emitter of the
message received
|
Err$
= ESPNow.ERROR$
|
Read the MAC address of the device(s) that
didn’t received the message
|
EVENTS
|
DESCRIPTION
|
OnEspNowMsg label
|
tTrigger an event each time a message is
received
|
OnEspNowError label
|
tTrigger an event each time that a
transmission error occurs.
This happen, in
particular, when the receiver device has not received the
message
|
These pictures shows some 3 typical ESP-NOW
communication models:
Let’s see an example with 3 modules with 2
acting like sensors and the 3rd as receiver.
The sensor modules will send a message each
second to the receiver.
The receiver will print these message in the
console.
Code for the SENSOR1 module
'ESP-NOW sensor1 example
RECEIVER_MAC$
= "60:01:94:51:D0:7D" ' MAC address of the receiver
print
"init " ; espnow.begin
' should print 0 if all
OK
espnow.add_peer RECEIVER_MAC$
' set the address of the
receiver
onEspNowError status
' set the place where jump in case of
TX error
timer0 1000,
sendMessage ' trigger a message at each
second
wait
sendMessage:
espnow.write
"Sensor 1 : " + str$(rnd(1000))
' send the
message
return
status:
print
"TX error on "; espnow.error$ ' print the error
return
|
Code for the SENSOR2 module
'ESP-NOW sensor2 example
RECEIVER_MAC$
= "60:01:94:51:D0:7D" ' MAC address of the receiver
print
"init " ; espnow.begin
' should print 0 if all
OK
espnow.add_peer RECEIVER_MAC$
' set the address of the
receiver
onEspNowError status
' set the place where jump in case of
TX error
timer0 1000,
sendMessage ' trigger a message at each
second
wait
sendMessage:
espnow.write
"Sensor 1 : " + str$(rnd(1000))
' send the
message
return
status:
print
"TX error on "; espnow.error$ ' print the error
return
|
Code for the RECEIVER module
'ESP-NOW receiver example
print
"init " ; espnow.begin
' should print 0 if all
OK
onEspNowMsg message
' set the place where jump in case of
message reception
wait
message:
print
"RX:"; espnow.read$;
" from "; espnow.remote$ '
print the message
return
|
Let’s see another example always with 2
sensors and one receiver.
In this case the receiver will retransmit back
to the sensor 1 the message received.
This means that the sensor 1 will receive the
message coming from the sensor 2 and also its own message.
The sensor 1 and the receiver will print the
messages received in the console
Code for the SENSOR1 module
'ESP-NOW sensor example
RECEIVER_MAC$
= "60:01:94:51:D0:7D"
print
"init " ; espnow.begin
' should print 0 if all
OK
espnow.add_peer RECEIVER_MAC$
' set the address of the
receiver
onEspNowMsg message
' set the place where jump in case of
message reception
onEspNowError status
' set the place where jump in case of
TX error
timer0 1000,
sendMessage ' trigger a message at each
second
wait
sendMessage:
espnow.write
"Sensor 1 : " + str$(rnd(1000))
' send the
message
return
message:
print
"RX:"; espnow.read$;
" from "; espnow.remote$ '
print message
return
status:
print
"TX error on "; espnow.error$ ' print the error
return
|
Code for the SENSOR2 module
'ESP-NOW sensor2 example
RECEIVER_MAC$
= "60:01:94:51:D0:7D" ' MAC address of the receiver
print
"init " ; espnow.begin
' should print 0 if all
OK
espnow.add_peer RECEIVER_MAC$
' set the address of the
receiver
onEspNowError status
' set the place where jump in case of
TX error
timer0 1000,
sendMessage ' trigger a message at each
second
wait
sendMessage:
espnow.write
"Sensor 1 : " + str$(rnd(1000))
' send the
message
return
status:
print
"TX error on "; espnow.error$ ' print the error
return
|
Code for the RECEIVER module
'ESP-NOW receiver example #2
SENSOR1_MAC$
= "68:C6:3A:C3:06:DB"
print
"init " ; espnow.begin
' should print 0 if all
OK
espnow.add_peer SENSOR1_MAC$
' set the address of the sensor
1
onEspNowMsg message
' set the place where jump in case of
message reception
wait
message:
msg$
= espnow.read$
rem$
= espnow.remote$
print
"RX:"; msg$; " from ";
rem$
ret
= espnow.write( msg$ +
" Transferred from "
+ rem$ ) ' transfer the
message received
return
status:
print
"TX error on "; espnow.error$ '
print the message
return
|
Let’s see now another example where a sensor
will send a message to 2 receivers :
Code for the SENSOR module
'ESP-NOW sensor example
RECEIVER1_MAC$
= "60:01:94:51:D0:7D"
RECEIVER2_MAC$
= "68:C6:3A:C3:06:DB"
print
"init " ; espnow.begin
' should print 0 if all
OK
espnow.add_peer RECEIVER1_MAC$
' set the address of the receiver
1
espnow.add_peer RECEIVER2_MAC$
' set the address of the receiver
2
onEspNowError status
' set the place where jump in case of
TX error
timer0 1000,
sendMessage ' trigger a message at each
second
wait
sendMessage:
espnow.write
"Sensor : " + str$(rnd(1000))
' send the
message
return
status:
print
"TX error on "; espnow.error$ 'print the error
return
|
Code for the RECEIVER 1 module
'ESP-NOW receiver example
print
"init " ; espnow.begin
' should print 0 if all
OK
onEspNowMsg message
' set the place where jump in case of
message reception
wait
message:
print
"RX:"; espnow.read$;
" from "; espnow.remote$ '
print the message
return
|
Code for the RECEIVER 2 module
'ESP-NOW receiver example
print
"init " ; espnow.begin
' should print 0 if all
OK
onEspNowMsg message
' set the place where jump in case of
message reception
wait
message:
print
"RX:"; espnow.read$;
" from "; espnow.remote$ '
print the message
return
|
ANNEXCAM
The AnnexCam is a special version of Annex32
specially developed for camera support.
It is essentially the same firmware as
the Annex32 except that many drivers have been removed to gain
space and memory.
The main reason is because the camera itself
uses practically all the ESP32 pins available leaving very few pins
for the I/O.
The ESP32-CAM module and the M5Camera model B
are supported.
These modules include an OV2640 camera and an
additional PSRAM for big size pictures.
The actual implementation allows you to use
this module to take snapshots or use it as a web camera while
running basic scripts in parallel.
For the ESP32-CAM, AnnexCam follows the pinout
of the SDCARD that is wired differently compared to the
M5stack..
AnnexCAM supports the SDCARD for the ESP32-CAM
using the SPI mode wiring.
This permits to free 2 pins, the GPIO4 and the
GPIO12 that can be used as general I/O.
As the pin GPIO4 is already connected to the
“Flash” led, the unique I/O pin available is the GPIO12.
In addition, the GPIO1 and GPIO3 (serial TX
and RX) can also be used as general I/O pins.
The M5CAMERA do not supports the SDCARD and
exposes only 2 pins (GPIO4 and GPIO13) via the GROVE connector.
Only the model B is actually supported.
Camera Functions / commands
The AnnexCam version introduce the following
functions:
Ret
= CAMERA.SETUP(framesize)
Initialise and set the initial resolution of
the camera.
The parameter can be a number from 0 to 10 as
described in the table below.
Returns 0 in case of error otherwise 1
Example :
Print
CAMERA.SETUP(7)
' init the camera at 800 x
600
Note:
This command is not required anymore as
the camera initialises automatically at the reboot.
Ret
= CAMERA.PICTURE(filename$)
Get a picture from the camera and save it
locally using the filename provided.
It works on both SDcard and internal FFAT
space within the limits of the free space available.
Returns 0 in case of error otherwise 1
Example :
Print
CAMERA.PICTURE("/image.jpg")
' save the picture in the file
image.jpg
Ret
= CAMERA.STOP()
Stops the camera driver
Returns 0 in case of error otherwise 1
Ret
= CAMERA.GETVALUE(param$)
Returns the value of the parameter as defined
in the table below:
Example :
Print
CAMERA.GETVALUE("hmirror")
' get the hmirror
parameter
Ret
= CAMERA.PARAMS(param$, value)
Set the parameter as defined in the table
below :
Returns 1 in case of error otherwise 0
Example :
Print
CAMERA.PARAMS("vflip",
1) ' set the vflip parameter to
1
The parameter
param$ can be :
PARAMETER
|
DESCRIPTION
|
framesize
|
Resolution of the image as per table below
0
|
160 x 120
|
1
|
128 x 160
|
2
|
176 x 144
|
3
|
240 x 176
|
4
|
320 x 240
|
5
|
400 x 296
|
6
|
640 x 480
|
7
|
800 x 600
|
8
|
1024 x 768
|
9
|
1280 x 1024
|
10
|
1600 x 1200
|
|
quality
|
Quality of the image from 10 to 63 (10 = max
quality)
|
brightness
|
Brightness of the image from -2 to 2 (default
0)
|
contrast
|
Contrast of the image from -2 to 2 (default
0)
|
saturation
|
Saturation (color) of the image from -2 to 2
(default 0)
|
vflip
|
Flip vertically the image is 1 (default 0)
|
hmirror
|
Mirror horizontally the image if 1 (default
0)
|
flash
|
Turns on/off the bright white led connected on
the module (default 0)
|
detection
|
Enables the face detection algo (0=disable,
1=enable)
|
recognition
|
Enables the face recognition algo
(0=disable, 1=enable)
|
enroll
|
Enroll the face detected by the camera and
store it in the RAM (0=disable, 1=enable)
|
savefaces
|
Save the faces enrolled from the RAM to the
disk (FFAT or SDCARD) (must be 1 to save)
|
readfaces
|
Read the faces enrolled from the disk (FFAT or
SDCARD) to the RAM (must be 1 to read)
|
special_effect
|
TBD
|
colorbar
|
TBD
|
sharpness
|
TBD
|
wb_mode
|
TBD
|
awb
|
TBD
|
awb_gain
|
TBD
|
aec
|
TBD
|
aec2
|
TBD
|
ae_level
|
TBD
|
aec_value
|
TBD
|
agc
|
TBD
|
agc_gain
|
TBD
|
gaincancelling
|
TBD
|
bpc
|
TBD
|
wpc
|
TBD
|
raw_gma
|
TBD
|
lenc
|
TBD
|
dcw
|
TBD
|
Using AnnexCam in output page
Using the url
http://module_ip/picture will show directy the image
in the browser.
Refreshing the web page (using F5, for
example) will refresh the image.
To use the camera in the output page, the
following html line is required :
HTML
|<img id='camera'>|
Alternatively, the following line can be used
to have an image that resize automatically
HTML
|<img id='camera' src="picture"
style=width:100%;height:auto;">|
Then a javascript command is required to start
the video
JSCALL
|set_pictimer(30);|
' try to refresh each 30 msec
Example:
' set the resolution at 640 x 480
if camera.setup(7)
= 0 then "Camera
Error" : end
cls
html
|<img id='camera' src="picture"
style=width:100%;height:auto;">|
jscall
|set_pictimer(30);|
|
A slightly more complete example :
rate
= 30 '
rate between each picture sample (msec)
pause 100
' set the max resolution in terms of memory
if camera.setup(10)
= 0 then end
print camera.params("vflip",
1)
print camera.params("hmirror",
1)
'set at 800x600
print camera.params("framesize",
7)
pause 100
onHtmlReload setpage
gosub setpage
wait
setpage:
cls
a$
= ""
a$
= a$ + |<h2>AnnexCAM Demo mini</h2>
|
a$
= a$ + |<img
id='camera' src="picture"
style=width:100%;height:auto;">|
html a$
jscall
"set_pictimer(" +
str$(rate)
+ ");"
return
|
To save a picture on the disk :
' set the resolution at 800 x 600
if camera.setup(7)
= 0 then "Camera
Error" : end
Print CAMERA.PICTURE("/image.jpg")
|
The image can then be downloaded / seen using
the file manager page.
Control of the camera using
URL
The camera parameters can be modified using
the following URL:
http://module_ip/cam_setpar?param=value
Where param can be any parameter from the
table below
Example:
http://192.168.1.66/cam_setpar?brightness=2
The value returned can be -1 if the parameter
is unknown, 1 in case of error or 0 if all was OK
The parameters can be read using the following
url:
http://module_ip/cam_status
The value returned will be a string like
this
framesize=4 quality=10 brightness=0 contrast=0 saturation=0 vflip=1
hmirror=1 colorbar=0 special_effect=0 flash=0
Where all the parameters are separated by the
newline character
PARAMETER
|
DESCRIPTION
|
framesize
|
Resolution of the image as per table below
0
|
160 x 120
|
1
|
128 x 160
|
2
|
176 x 144
|
3
|
240 x 176
|
4
|
320 x 240
|
5
|
400 x 296
|
6
|
640 x 480
|
7
|
800 x 600
|
8
|
1024 x 768
|
9
|
1280 x 1024
|
10
|
1600 x 1200
|
|
quality
|
Quality of the image from 10 to 63 (10 = max
quality)
|
brightness
|
Brightness of the image from -2 to 2 (default
0)
|
contrast
|
Contrast of the image from -2 to 2 (default
0)
|
saturation
|
Saturation (color) of the image from -2 to 2
(default 0)
|
vflip
|
Flip vertically the image is 1 (default 0)
|
hmirror
|
Mirror horizontally the image if 1 (default
0)
|
flash
|
Turns on/off the bright white led connected on
the module
|
special_effect
|
TBD
|
colorbar
|
TBD
|
Face Recognition
AnnexCAM includes the support for face
recognition.
This is basically based on 2 parts :
1) Face
detection
2) Face
recognition
The face detection enables the detection of
faces whilst the face recognition compares the face detected
against a list of previously stored faces.
This is very CPU time and resources consuming
so it works only with resolutions of 320x240 and below.
The detection / recognition can be controlled
using the following URL:
http://module_ip/cam_setpar?param=value
PARAMETER
|
DESCRIPTION
|
detection
|
Enables the face detection algo (0=disable,
1=enable)
|
recognition
|
Enables the face recognition algo
(0=disable, 1=enable)
|
enroll
|
Enroll the face detected by the camera and
store it in the RAM (0=disable, 1=enable)
|
savafaces
|
Save the faces enrolled from the RAM to the
disk (FFAT or SDCARD) (must be 1 to save)
|
readfaces
|
Read the faces enrolled from the disk (FFAT or
SDCARD) to the RAM (must be 1 to read)
|
The faces enrolled are stored in the file
named “/face.fh”.
This file can then be backuped and transferred
to another module.
If the face detection is enabled, as soon as
the camera detect a face, AnnexCAM will include a special
parameters in the header of the image transferred :
Detected:x1,
y1, x2, y2
Where (x1, y1) and (x2, y2) are the
coordinates (in pixels) that describe the corners of the box
surrounding the face detected
If the face recognition is enabled, as soon as
the camera recognise a face, AnnexCAM will include a special
parameters in the header of the image transferred :
Recognition:Match
ID:xx
Where xx is a number that identify the subject
identified
Or
Recognition:No
Match
If the face has not been recognised
This information can be extracted from the
browser side using javascript.
Image / video reception from
Annex
Annex includes the feature to receive the
image from another module with AnnexCAM and show them on the TFT
display.
This can be done using the function
Ret$
= TFT.CAMERA(url$
[,x ,y] [,scale])
where
url$ is the address of the camera
x
and y
represent the position where the image will be shown on the
display
scale
is a number that enable to scale down the image, useful to display
an image with higher resolution than the display
‘scale’(optional)
enable to scale the image (see next table)
scale
|
Scaling effect
|
0
|
1:1
|
1
|
1:2
|
2
|
1:4
|
3
|
1:8
|
For example, to
receive a simple stream of images ( a video) from the camera with
IP 192.168.1.13:
while 1
a$
= tft.camera$("http://192.168.1.13/picture")
wend
|
This function returns a string value that
represents the header of the answer coming from the camera.
The header contains very interesting
information such as the detection or the recognition of a face.
This is a typical content
HTTP/1.1
200 OK
Content-Length: 7229
Content-Type: image/jpeg
Access-Control-Allow-Origin:
*
Access-Control-Allow-Headers:
Content-Type,Authorization
Access-Control-Expose-Headers: Detected,
Recognition, Resolution
Resolution: 320x240
Detected:
57.469482,0.000000,190.526123,186.304199
Recognition: No
Match
Connection: close
Accept-Ranges: none
The highlighted part contains the
coordinates of the detected face and eventually if the face has
been detected compared to a list of stored profiles
This more complete
example shows how to manage the value returned by TFT.CAMERA$.
It also shows how
include the login and password for camera with restricted
access
timer0 1000,
count
tft.init 1
tft.fill
tft.color(red)
tft.brightness 255
a$=
""
c
= 0 : z = 0
while 1
'Read from the camera using the given
login:password
a$
= tft.camera$("http://mylogin:mypassword@192.168.1.13/picture")
'Check inside the answer is a face has been detected /
recognised
p
= instr(a$,
"Detected:")
if p <> 0 then
d$ = mid$(a$,
p + 9)
x1 = val(word$(d$,
1, ",")) : y1 =
val(word$(d$,
2, ","))
x2 = val(word$(d$,
3, ",")) : y2 =
val(word$(d$,
4, ","))
r = instr(a$,
"Recognition:")
if r = 0 then
tft.rect x1, y1, x2-x1, y2-y1, 65504
'(yellow)
else
if instr(d$,
"No Match") <> 0
then
tft.rect x1, y1, x2-x1, y2-y1, 63488
'(red)
else
tft.rect x1, y1, x2-x1, y2-y1, 2016
'(green)
end if
end if
end if
wend
end
count:
print
"frames / sec ", z-c,
ramfree
c
= z
return
|
CONVERSION FUNCTIONS
A set of conversion functions have been
implemented.
These permit conversion from different units /
formats in a simple way.
All these functions share the same prefix
CONVERT. followed by the specific conversion name.
The functions implemented are :
FUNCTION
|
DESCRIPTION
|
CONVERT.DEGC_TO_F(degC)
|
Converts from °C to °F
|
CONVERT.F_TO_DEGC(degF)
|
Converts from °F to °C
|
CONVERT.TO_IEEE754(num)
|
Converts from float number to IEEE754 binary
format
|
CONVERT.FROM_IEEE754(iee754_bin)
|
Converts from IEEE754 binary format to float
number
|
CONVERT.MAP(number,
fromLow, fromHigh, toLow, toHigh)
|
Re-maps a number from one range to
another. That is, a value of fromLow would get mapped to
toLow, a value of fromHigh to toHigh, values
in-between to values in-between, etc.
|
BAS CONSTANTS
Several constants are available in the
interpreter using the
BAS.xxx format.
All these constants share the same prefix
BAS. followed by the specific option.
Some of them (i.e.
BAS.RTCMEM$) can also be also be written using it as
destination..
CONSTANT
|
DESCRIPTION
|
BAS.VER
|
Returns the version
of the Basic in numerical format
Example:
Print BAS.VER
1.37
|
BAS.VER$
|
Returns the version
of the Basic in string format
Example:
Print BAS.VER$
Annex32 WI-Fi
1.37
|
BAS.ERRLINE
|
Returns the line
number where the error happened. Value of 0 means no error.
It is reset to 0
with the command ONERROR CLEAR or running the program or with
the command ONERROR IGNORE or ONERROR SKIP.
|
BAS.ERRNUM
|
Returns a number
where non zero means that there was an error.
It is reset to 0
with the command ONERROR CLEAR or running the program or with
the command ONERROR IGNORE or ONERROR SKIP.
|
BAS.ERRMSG$
|
Return a string
representing the error message that would have normally been
displayed on the console. It is reset to “No Error” running the
program or with the command ONERROR CLEAR or ONERROR IGNORE or
ONERROR SKIP.
|
BAS.FILENAME$
|
Returns the name of
the current basic file
|
BAS.RTCMEM$
|
Returns the content
of the CPU RTC internal memory.
This memory
maintains the content between reset so it is useful in association
with the SLEEP command when the module goes in low power mode.
This memory is
limited at 512 bytes and can be set with the corresponding
command BAS.RCTMEM$ = “xxx”.
|
BAS.SSID$
|
Returns the login
used for the STATION
wifi connection.
|
BAS.PASSWORD$
|
Returns the
password used for the
STATION wifi connection.
|
BAS.LOAD
|
Loads another .bas
program and runs it immediately.
Returns 0 if
successful or -1 if the file was not found
Example:
Print BAS.LOAD
"/test.bas"
|
BAS.RESETREASON
|
Returns the reason
for the last reset.
The reason is
defined in the table below
VALUE
|
REASON
|
0
|
Unknown
|
1
|
Power
on reset
|
2
|
Unknown
|
3
|
Software reset digital core
|
4
|
Legacy
watch dog reset digital core
|
5
|
Deep
Sleep reset digital core
|
6
|
Reset
by SLC module, reset digital core
|
7
|
Timer
Group0 Watch dog reset digital core
|
8
|
Timer
Group1 Watch dog reset digital core
|
9
|
RTC
Watch dog reset digital core
|
10
|
Intrusion tested to reset CPU
|
11
|
Time
Group reset CPU
|
12
|
Software reset CPU
|
13
|
RTC
Watch dog reset CPU
|
14
|
for APP
CPU, reset by PRO CPU
|
15
|
Reset
when the vdd voltage is not stable
|
16
|
RTC
Watch dog reset digital core and rtc module
|
|
BAS.DEVICE
|
Returns a number
representing the current module / TFT connected
VALUE
|
MODULE
|
0 to
7
|
ST7735
|
86
|
ILI9486
|
91
|
ILI9163
|
93
|
ILI9341
|
94
|
M5stack
|
95
|
M5stack
with different TFT
|
96
|
ST7796
|
101
|
ATOM
|
102
|
ATOM ECHO
|
103
|
ATOM MATRIX
|
150
|
ODROID
GO
|
200
|
No
TFT
|
201
|
ESP32-CAM
|
202
|
M5
CAMERA
|
|
OPTION COMMANDS
It is possible to define some options in the
interpreter using the
OPTION.xxx commands.
All these commands share the same prefix
OPTION. followed by the specific option.
The options available are :
COMMAND
|
DESCRIPTION
|
OPTION.CPUFREQ
80|160|240
|
Define CPU speed in
Mhz of the module.
The value can be
80, 160 or 240.
The default value
is 240Mhz.
Setting the speed
at 80Mhz, will divide by 3 the speed of the module but lower the
power requirement of the module to around 5mA
|
OPTION.MAC
mac$
|
Define an arbitrary
MAC address for the module.
‘mac$’ must be a
valid MAC address.
Example :
OPTION.MAC
"AA:BB:CC:DD:EE:FF"
|
OPTION.LOWRAM
value
|
Define the RAM
available lower limit. If during the execution of the program this
limit is reached, the program automatically stops with an OUT OF
MEMORY error message. By default the value is defined at 10000.
As it introduces a
little overhead, it can be disabled setting this option at 0
(however this is not recommended).
|
OPTION.NTPSYNC
|
Sync the local time
with the remote NTP servers
|
OPTION.WDT time
|
Define the time for
the Watchdog timer.
If the WDT is not
reset regularly with the command OPTION.WDTRESET
within the defined time, the module
will reset automatically.
Setting
time
at 0, will disable the watchdog.
|
OPTION.WDTRESET
|
Reset the Watchdog
timer
|
FUNCTIONS:
The functions are divided into 2 groups :
-
Numerical functions (Double precision / integer)
-
String functions
The string functions are always terminated by
a ‘$’ (dollar) sign.
NUMERICAL FUNCTIONS
ABS(number)
|
Returns the
absolute value of the argument 'number'
|
ACOS(number)
|
Returns the
arccosine value of the argument 'number' in radians
|
ADC(pin)
|
Returns the
external voltage applied to the ADC pin defined as a digital value
ranging from 0 (0v) to 4095.
Input voltage range
is 0 ... 3.3V.
|
APDS9960.SETUP (mode)
|
Initialise a
APDS9960 sensor connected using I2C to the module.
‘mode’ determine
the sensing modality as per the table below :
MODE
|
SENSING
MODALITY
|
1
|
Gesture
Detection
|
2
|
Ambient
Light and RGB Color Sensing
|
3
|
Proximity Sensing
|
Before using it, the I2C bus must be
initialised with the command I2C.SETUP
This function returns 1 if the APDS9960 sensor
is found, otherwise it returns 0
|
APDS9960.READGESTURE
|
Returns the last
gesture detected by the APDS9960 sensor.
The APDS9960 sensor
must be set in “Gesture Detection” mode before using this function
( APDS9960.SETUP(1) )
The returned value
is :
VALUE
|
GESTURE
|
0
|
NONE
|
1
|
LEFT
|
2
|
RIGHT
|
3
|
UP
|
4
|
DOWN
|
5
|
NEAR
|
6
|
FAR
|
|
APDS9960.AMBIENT
|
Returns the ambient
luminosity detected by the APDS9960 sensor.
The APDS9960 sensor
must be set in “Ambient Light and RGB Color Sensing” mode before
using this function ( APDS9960.SETUP(2) )
The range of the
returned value is from 0 to 65535
|
APDS9960.RED
|
Returns the red
light intensity detected by the APDS9960 sensor.
The APDS9960 sensor
must be set in “Ambient Light and RGB Color Sensing” mode before
using this function ( APDS9960.SETUP(2) )
The range of the
returned value is from 0 to 65535
|
APDS9960.GREEN
|
Returns the green
light intensity detected by the APDS9960 sensor.
The APDS9960 sensor
must be set in “Ambient Light and RGB Color Sensing” mode before
using this function ( APDS9960.SETUP(2) )
The range of the
returned value is from 0 to 65535
|
APDS9960.BLUE
|
Returns the blue
light intensity detected by the APDS9960 sensor.
The APDS9960 sensor
must be set in “Ambient Light and RGB Color Sensing” mode before
using this function ( APDS9960.SETUP(2) )
The range of the
returned value is from 0 to 65535
|
APDS9960.PROXIMITY
|
Returns the
distance information detected by the APDS9960 sensor.
The APDS9960 sensor
must be set in “Proximity Sensing” mode before using this function
( APDS9960.SETUP(3) )
The range of the
returned value is from 0 to 255
|
APDS9960.GESTUREGAIN
(gain)
|
Set the gain of the
gesture sensing provided by the APDS9960 sensor.
‘gain’ can be one
of the following values:
GAIN
|
MEANING
|
0
|
1x
|
1
|
2x
|
2
|
4x
|
3
|
8x
|
This function returns 1 if the function was
successful, otherwise it returns 0
|
APDS9960.GESTURELED
(intensity)
|
Set the inensity of
the LED used during the gesture sensing provided by the APDS9960
sensor.
‘intensity’ can be
one of the following values:
INTENSITY
|
MEANING
|
0
|
100 mA
|
1
|
50 mA
|
2
|
25 mA
|
3
|
12.5 mA
|
This function returns 1 if the function was
successful, otherwise it returns 0
|
ASC(string$)
|
Returns the ASCII
code of the first char in ‘string$’
|
ASIN(number)
|
Returns the arcsine
value of the argument 'number' in radians
|
ATAN(number)
|
Returns the
arctangent of the argument 'number' in radians
|
ATAN2(x, y)
|
Returns the angle
whose tangent is the quotient of two specified numbers.
|
BAS.VER
|
Returns the version
of the Basic in numerical format
Example:
Print BAS.VER
1.25
|
BAS.ERRLINE
|
Returns the line
number where the error happened. Value of 0 means no error.
It is reset to 0
with the command ONERROR CLEAR, or by running the program, or with
the command ONERROR IGNORE, or ONERROR SKIP.
|
BAS.ERRNUM
|
Returns a number
where non zero means that there was an error.
It is reset to 0
with the command ONERROR CLEAR, or by running the program, or with
the command ONERROR IGNORE, or ONERROR SKIP.
|
BME280.SETUP(address)
|
Initialise a BME280
sensor connected using I2C to the module.
‘address’ defines
the I2C address of the sensor. The value can be &h76 or
&h77.
Before using it, the I2C bus must be
initialised with the command I2C.SETUP
Returns 1 if the BME280 sensor has been found,
otherwise returns 0
|
BME280.ALT(qnh)
|
Returns the current
altitude using the baro pressure from the sensor BME280.
The sea level
pressure (in HectoPascal) must be given as a reference
argument.
The unit of the
value returned is Meters (m)
|
BME280.HUM
|
Returns the
Humidity parameter from the sensor BME280.
The unit of the
value returned is ‘%’
If the value
returned is always 0, the sensor is probably a BMP280.
|
BME280.QFE
|
Returns the
Barometric Pressure parameter from the sensor BME280.
The unit of the
value returned is HectoPascal ‘Hpa’
|
BME280.QNH(altitude)
|
Returns the sea
level pressure using the baro pressure from the sensor BME280.
The current
altitude (in meters) must be given as a reference argument.
The unit of the
value returned is HectoPascal ‘Hpa’
|
BME280.TEMP
|
Returns the
Temperature parameter from the sensor BME280.
The unit of the
value returned is ‘%’
|
BNO055.SETUP( address)
|
Initialise a BNO055
connected using I2C to the module.
‘address’ defines
the I2C address of the sensor. The value can be &h28 or
&h29.
Before using it, the I2C bus must be
initialised with the command I2C.SETUP
Returns 1 if the BNO055 sensor has been found,
otherwise returns 0
|
BNO055.HEADING
|
Returns the Heading
angle information from the sensor BNO055.
The unit of the
value returned is ‘degrees’
|
BNO055.PITCH
|
Returns the Pitch
angle information from the sensor BNO055.
The unit of the
value returned is ‘degrees’
|
BNO055.ROLL
|
Returns the Roll
angle information from the sensor BNO055.
The unit of the
value returned is ‘degrees’
|
BNO055.VECTOR ( param,
axis)
|
Returns different
type of information from the sensor BNO055.
Refer to the table
below for the details of the information returned.
Example:
Print “Gyro infos
x,y “, BNO055.VECTOR(3,1), BNO055.VECTOR(3,2)
PARAM
|
AXIS
|
PARAMETER
|
UNITS
|
1
|
1
|
Accelerometer X
axis
|
m/sec2
|
2
|
Accelerometer Y
axis
|
3
|
Accelerometer Z
axis
|
2
|
1
|
Magnetometer X
axis
|
micro tesla
|
2
|
Magnetometer Y
axis
|
3
|
Magnetometer Z
axis
|
3
|
1
|
Gyroscope X
axis
|
deg / sec
|
2
|
Gyroscope Y
axis
|
3
|
Gyroscope Z
axis
|
4
|
1
|
Linear
Accelerometer X axis
|
m/sec2
|
2
|
Linear
Accelerometer Y axis
|
3
|
Linear
Accelerometer Z axis
|
5
|
1
|
Gravity Data X
axis
|
m/sec2
|
2
|
Gravity Data Y
axis
|
3
|
Gravity Data Z
axis
|
6 or any other value
|
1
|
Euler Angle
Heading
|
deg
|
2
|
Euler Angle
Roll
|
3
|
Euler Angle
Pitch
|
|
BNO055.CALIB [(param)]
|
Returns the
calibration status of the BNO055 sensor.
Used without any
argument, it will return the global calibration status ( 1 =
calibrated, 0 = not calibrated).
Refer to the table
below when the function is called with an argument
PARAM
|
PARAMETER
|
1
|
System
Status
|
2
|
Gyroscopes Status
|
3
|
Accelerometers Status
|
4
|
Magnetometers Status
|
none
|
Global
Status (returns 1 if all are OK)
|
Example:
Print “Is
Calibrated“, BNO055.CALIB
|
CINT(number)
|
Round numbers with
fractional portions up or down to the next whole number or
integer.
For example :
●
15.46 will round to 15
●
15.57 will round to 16
●
-83.45 will round to -83
●
-83.55 will round to -84
See also INT() and
FIX().
|
CONVERT.DEGC_TO_F(degC)
|
Converts from °C to
°F
|
CONVERT.F_TO_DEGC(degF)
|
Converts from °F to
°C
|
CONVERT.TO_IEEE754(num)
|
Converts from float
number to IEEE754 binary format
|
CONVERT.FROM_IEEE754(ieee754_bin)
|
Converts from
IEEE754 binary format to float number
|
CONVERT.MAP(number, fromLow, fromHigh, toLow, toHigh)
|
Re-maps a number from one range to
another. That is, a value of fromLow would get mapped to
toLow, a value of fromHigh to toHigh, values
in-between to values in-between, etc.
|
COS(number)
|
Returns the cosine
of the argument 'number' in radians.
|
COUNTER.COUNT (cnt)
|
Returns
the number of pulses recorded by the counter.
‘cnt’
identifies the counter, which can be 1 or 2
It is
associated with the commands COUNTER.SETUP, COUNTER.RESET
|
COUNTER.PERIOD (cnt)
|
Returns the period
of time between 2 successive pulses recorded by the counter.
The value returned
is expressed in uS (micro seconds).
‘cnt’ identifies
the counter, which can be 1 or 2
It is associated
with the commands COUNTER.SETUP, COUNTER.RESET
|
DATEUNIX(date$)
|
Converts a date in format dd/mm/yy into UNIX FORMAT.
See
also TIMEUNIX, and the complementary UNIXDATE$ and UNIXTIME$
|
DHT.TEMP
|
Returns
the temperature of the DHT sensor set with "DHT.SETUP"
The
syntax is temp = DHT.TEMP
Returns
the temperature in °C
|
DHT.HUM
|
Returns the
humidity of the DHT sensor set with "DHT.SETUP"
The
syntax is hum = DHT.HUM
Returns
the humidity in %
|
DHT.HEATINDEX
|
Returns the heat
index of the DHT sensor set with "DHT.SETUP"
The
syntax is heat = DHT.HEATINDEX
Returns
the heatindex in °C
|
DISTANCE(pin_trig,
pin_echo)
|
Using a HC-SR04
ultrasonic sensor, this function returns the distance in cm to a
target. The range is approximately from 3 cm to 3 meters.
‘pin_trig’ and
‘pin_echo’ define the pins where the HC-SR04 module is
connected.
|
EMAIL from$, to$, subject$,
message$
|
Send an e-mail and
return the status of the sending.
The program will
stop the execution until the message is sent or an error
occurs.
The result will be
1 if OK or 0 if a problem happend.
‘from$’ is the
email address of the sender (ex: from_me@yahoo.com)
‘to$’’ is the email
address of the receiver (ex: to_you@yahoo.com)
‘subject$’ is the
subject of the message
‘message$’ is the
content of the message
The sender and
receiver must both be valid email addresses.
Example :
r = EMAIL
("from_me@yahoo.com", "to_you@gmail.com", "Important message " +
date$, "The memory available is " + str$(ramfree) )
|
ESPNOW.ADD_PEER(MAC_add$)
|
Add a peer
(module) to the ‘receiver’ list.
The peer is
specified by its MAC address
Returns 0 if OK or
another number in case of error
|
ESPNOW.BEGIN
|
Starts the ESP-NOW
communications.
Returns 0 if OK or
another number in case of error
|
ESPNOW.DEL_PEER(MAC_add$)
|
Delete a peer
(module) from the ‘receiver’ list.
The peer is
specified by its MAC address (MAC_add$)
Returns 0 if OK or
another number in case of error
|
ESPNOW.STOP
|
Stops the ESP-NOW
communications.
Returns 0 if OK or
another number in case of error
|
ESPNOW.WRITE( msg$)
|
write a message to
the peers defined in the list
The message ‘msg$’
must be less than 250 characters.
Returns 0 if OK or
another number in case of error
|
ESPNOW.WRITE( msg$,MAC_add$)
|
write a message to
a specific peer defined by its MAC address (MAC_add$)
The message ‘msg$’
must be less than 250 characters.
Returns 0 if OK or
another number in case of error
|
EXP(number)
|
Returns the
exponential value of 'number'.
|
FIX(number)
|
Truncate a number
to a whole number by eliminating the decimal point and all
characters to the right of the decimal point.
For example :
● 7.11
will return 7
● 7.85
will return 7
●
-2.11 will return -2
●
-2.75 will return -2
The major
difference between FIX and INT is that FIX provides a true integer
function (ie, does not return the next lower number for negative
numbers as INT() does).
See also INT() and
CINT() .
|
FILE.DELETE(filename$)
|
Delete the file
specified by ‘filename$’.
Returns 1 if the
delete was successful, otherwise returns 0
|
FILE.EXISTS(filename$)
|
Returns 1 if the
file ‘filename$’ exists, otherwise returns 0
|
FILE.SIZE(filename$)
|
Returns the size of
the file (in bytes) if the file exist, otherwise returns -1
|
FLASHFREE
|
Returns the free
disk memory available (number of bytes)
|
FUSION.ANGLE(axis)
|
Returns the angles
(in degrees) calculated by the FUSION algorithm.
The returned value
is :
AXIS
|
RETURNED INFORMATION
|
1
|
PITCH
|
2
|
ROLL
|
3
|
YAW
|
|
INSTR([start], string$,
pattern$)
|
Returns the
position at which 'pattern$’ is located into ‘string$’, starting
from (optional) start.
‘start’ can also be
a negative number. In this case the pattern will be searched from
the end of the string.
The function
returns 0 if pattern$ is not found
|
I2C.LEN
|
Returns the number
of bytes available for retrieval with I2C.READ. This should be
called on a master device after a call to I2C.REQFROM.
Example:
Len = I2C.LEN
|
I2C.READ
|
Reads a byte that
was transmitted from a slave device to a master after a call to
I2C.REQFROM.
Example:
b = I2C.READ
|
I2C.READREGBYTE (i2c_address,
register)
|
Read a byte from a
slave device using a given device register address.
‘i2c_address’
define the I2C slave address
‘register’ defines
the device register
Example:
i2c_addr = &h60
: register = 33
value =
I2C.ReadRegByte i2c_addr , register
Will read the value
of the register address 33 on the device with i2c address
&h60.
For clarification,
this command is equivalent to the following program:
i2c.begin
i2c_addr
I2c.write
register
i2c.end
i2c.reqfrom
i2c_addr, 1
value =
i2c.read
I2c.end
TBD : the syntax
must be conformed to the other functions (using parentheses)
|
I2C.END
|
Ends a transmission
to a slave device that was begun by I2C.BEGIN and transmits the
bytes that were queued by I2C.WRITE.
It returns a
value indicating the status of the transmission:
0:success
1:data too long to
fit in transmit buffer
2:received NACK on
transmit of address
3:received NACK on
transmit of data
4:other error
Example:
stat = I2C.END
|
INT(number)
|
Truncate an
expression to the next whole number less than or equal to the
argument.
For example :
● 7.11
will return 7
● 7.85
will return 7
●
-2.11 will return -3
●
-2.75 will return -3
The FIX() function
provides a true integer function.
See also FIX() and
CINT() .
|
LEN(string$)
|
Returns the length
of the string ‘string$’
|
LOG(number)
|
Returns the natural
logarithm of the argument 'number'
|
MILLIS
|
Returns the number
of milliseconds elapsed since the start-up of the module
|
MQTT.Setup(server$ [,port])
|
Setup the MQTT communications.
Server$ is the MQTT server address
Port is the MQTT port; if not defined defaults
to 1883
Returns 1 if successful or 0 if there is
a problem.
|
MQTT.Connect(login$, pass$, [id$])
|
Connect to the server using the provided login
and password.
Optionally ID$ permits to define an arbitrary
ID
Returns 1 if successful or 0 if there is
a problem.
|
MQTT.Connect("", "", [id$])
|
Connect to the server without
identification
Optionally ID$ permits to define an arbitrary
ID
Returns 1 if successful or 0 if there is
a problem.
|
MQTT.Disconnect()
|
Disconnects from the MQTT server
Returns 1 if successful or 0 if there is
a problem.
|
MQTT.Publish(topic$, message$)
|
Publish a string message in the specified
topic
Returns 1 if successful or 0 if there is
a problem.
|
MQTT.Subscribe(topic$ [,Qos])
|
Subscribes to messages published to the
specified topic.
Qos can be 0 or 1; if not defined defaults to
0
Returns 1 if successful or 0 if there is
a problem.
|
MQTT.UnSubscribe(topic$)
|
Unsubscribes from the specified topic
Returns 1 if successful or 0 if there is
a problem.
|
MQTT.Connected()
|
Returns the current connection status.
Returns 1 if connected or 0 if
disconnected
|
NEO.GETPIXEL(pos)
|
Gets, in a
stripline, the 32bit merged color value of the led at position
'led_pos'
|
NEO.RGB(R, G, B)
|
Returns the 3
supplied R,G,B colours merged into a single 32bit RGB color value,
useful for the NEO.PIXEL function and web page colors
|
PI
|
Returns the value
3.1415925….
|
|
Returns the
computed value of the given PID controller.
The ‘target_value’
is desired output value while ‘current_value’ is the value coming
from the sensor.
This function must
be called regularly in a loop
As there are 4 PID
controllers, the prefix can be PID1, PID2, PID3 or PID4.
|
[36] PIN(pin_number)
|
Returns the value
of any external I/O pin.
The pin_number
refers to GPIO and can be from 0 ... 5 or 12 ...15
The value returned
is 0 if the pin is LOW and 1 if the pin is HIGH
|
PIN.TOUCH(pin_number)
|
Returns the touch
value for the pin ‘pin_number’.
‘Pin_number’ can be
0, 2, 4, 12, 13, 14, 15, 27 32, 33.
The value returned
is around 70 when not touched and around 15 when touched.
|
PING(host$)
|
The ping function
can be used to test the ability of the ESP32 to reach a specified
destination computer. The ping command is usually used as a simple
way to verify that a computer can communicate over the network with
another computer or network device.
‘host$’ is the
remote address to ping. Can be also an IP address.
Returns 1 if the
remote host is reachable, otherwise returns 0 if unreachable
Example:
Print
PING("www.google.com")
Print
PING("192.168.1.1")
Important:
This is a
script-only function which doesn’t work in ‘immediate’ mode.
|
POW(x, y)
|
Return the number x
raised to the power of y
|
RAMFREE
|
Returns the free
ram available (number of bytes)
|
RND(number)
|
Returns a random
number in the range from 0 to ‘number'
|
SERIAL.LEN
|
Returns the number
of chars available in the receive buffer of the serial port
|
SERIAL2.LEN
|
Returns the number
of chars available in the receive buffer of the serial port #2
|
SGN(number)
|
Returns the sign of
the argument 'number', +1 for positive numbers, 0 for 0, and -1 for
negative numbers.
|
SIN(number)
|
Returns the sine of
the argument 'number' in radians.
|
SPI.BYTE(byte)
|
Write and receive a
byte on the SPI bus.
Send the content of
‘byte’ and returns the byte received
Example:
r =
SPI.BYTE(&haa)
|
SQR(number)
|
Return the square
root of the argument ‘number’
|
TAN(number)
|
Returns the tangent
of the argument 'number' in radians.
|
TFT.RGB(r,g,b)
|
Returns a 16 bit
number representing the RGB565 conversion of a color specified with
8 bit resolution.
‘r’ is the
red component; must be in the range 0 to 255
‘g’ is the
green component; must be in the range 0 to 255
‘b’ is the
blue component; must be in the range 0 to 255
Example :
TFT.FILL
TFT.RGB(0,255,0) ‘ fill the screen with a full green
color
|
TIMEUNIX(time$)
|
Converts a time in
format hh:mm:ss into UNIX FORMAT.
See also DATEUNIX,
and the complementary UNIXTIME$ and UNIXDATE$
|
TM1638.BUTTONS
|
Returns the state
of the 8 buttons installed on the module TM1638.
It returns an 8-bit
value where each bit is associated with a button
Example :
Print
TM1638.BUTTONS ‘print 1 if the button 1 is pressed
|
TOUCH.X
|
Returns the X
position of the touched position on the TFT screen.
Useful in
combination with the function TOUCH.Y and the command ONTOUCH
|
TOUCH.Y
|
Returns the X
position of the touched position on the TFT screen.
Useful in
combination with the function TOUCH.X and the command ONTOUCH
|
VAL(string$)
|
Returns
the supplied string converted into a numeric value.
Example :
a$ = “12.34”
b = val(a$)
The same function
can also be used to convert from HEX :
a$ =
"&hFF01"
b = val(a$)
|
WIFI.CHANNEL
|
Returns the current
radio channel used for the WIFI communication.
Can be a number
from 1 to 13
|
WIFI.MODE
|
Return the current
mode of the WIFI connection.
The returned value
is:
VALUE
|
MEANING
|
0
|
The WIFI is in sleep
mode
|
1
|
The WIFI is in STATION
mode
|
2
|
The WIFI is in AP mode
|
|
WIFI.NETWORKS ( network$ )
|
Returns
the number of networks found after the command WIFI.SCAN.
The
returned value is :
-2 if the scan is not started
-1 if the scan is not terminated
or the number of networks found (can be 0 if none)
The
variable ‘network$’ will contain the list of any networks
found.
‘network$’ will contain a line for each network with the SSID, the
BSSID and the RSSI separated by comma (,).
Example
:
WIFI.SCAN
While
WIFI.NETWORKS(A$) = -1
Wend
Print
a$
The
result will be (for example) :
Vodaphone, 00:50:56:C0:00:08, -50
Orange,
00:50:56:C0:32:07, -70
Xxxx, 00:50:56:C0:86:CA,-78
|
WIFI.STATUS
|
Returns
the status of the WIFI connection.
The
returned value is :
VALUE
|
MEANING
|
0
|
IDLE
|
1
|
NO SSID
AVAILABLE
|
2
|
SCAN
COMPLETED
|
3
|
CONNECTED
|
4
|
CONNECTION
FAILED
|
5
|
CONNECTION
LOST
|
6
|
DISCONNECTED
|
255
|
OFF
|
|
WORD.COUNT( string$
[,delimiter$])
|
This
function returns the number of words in the specified string.
The
string delimiter is optional; when it is not used, the space
character is the delimiter.
Example
:
a$ = "abc def
ghi ijk"
Print
WORD.COUNT(a$) ‘ will print 4
b$ =
"the-!-quick-!-brown-!-fox-!-jumps-!-over"
Print
WORD.COUNT(b$ "-!-") ‘ will print 6
See also WORD$,
WORD.DELETE$ and WORD.FIND.
|
WORD.FIND( string$, find$ [,delimiter$])
|
This
function returns the word position in the string.
The
string delimiter is optional; when it is not used, the space
character is the delimiter.
If the word is not
found, the result is 0.
Example :
a$ = "abc def ghi ijk"
Print WORD.FIND(a$,
"ghi") ‘ will print 3
b$ =
"the-!-quick-!-brown-!-fox-!-jumps-!-over"
Print WORD.FIND(b$, "fox",
"-!-") ‘ will
print 4
See also WORD$,
WORD.DELETE$ and WORD.COUNT.
|
STRING FUNCTIONS
BAS.ERRMSG$
|
Return a string
representing the error message that would have normally been
displayed on the console. It is reset to “No Error” by: running the
program, or with the command ONERROR CLEAR, or ONERROR IGNORE, or
ONERROR SKIP.
|
BAS.FILENAME$
|
Returns the name of
the current basic file
|
BAS.FTP$( host$, login$, password$, file$, folder$)
|
Transfer a file
stored locally on an FTP server.
Returns an explicit
text message as the result of the operation.
host$ is the
address of the FTP server
login$ is the login
of the account on the FTP server
password$ is the
password of the account on the FTP server
file$ is the file
that will be sent
folder$ is the
folder where the file will be sent
|
BAS.PASSWORD$
|
Returns the
password used for the STATION wifi connection.
|
BAS.RTCMEM$
|
Returns the content
of the CPU RTC internal memory.
This memory
maintains the contents between resets, so it is useful in
association with the SLEEP command when the module goes in low
power mode.
This memory is
limited at 512 bytes and can be set with the corresponding
command BAS.RCTMEM$ = “xxx”.
|
BAS.SSID$
|
Returns the login
used for the STATION wifi connection.
|
BAS.VER$
|
Returns the version
of the Basic in string format
Example:
Print BAS.VER$
Annex WI-Fi Basic
1.36 beta
|
BIN$(number)
|
Returns the Binary
representation of the argument ‘number’.
The number is
converted to integer before the conversion.
|
BUTTON$(name$, label [, id]
)
|
Returns a string
containing the html representation of a button.
‘name$’ represent
the text shown in the button,
‘label’ is the
GOSUB label where it will branch to when clicked,
‘id’ is an optional
argument that can be used to define the ID of the object (useful to
style it with CSS).
The function called
when clicking on the button must always terminate with the RETURN
command
Check the chapter
about html objects for more details
|
CHECKBOX$( variable
[,id])
|
Returns a string
containing the html representation of a checkbox.
‘variable’ is the
variable associated with the checkbox; changing the value of the
variable in the basic code will change also the value in the html
and vice-versa (0 = unchecked, 1 = checked).
The variable must
be Numerical.
‘id’ is an optional
argument and can be used to define the ID of the object (useful to
style it with CSS).
When the value is
changed by the user, the event ‘onHtmlChange’ is triggered.
Check the chapter
about html objects for more details
|
CHR$(number)
|
Returns a string
containing the ASCII character with the code ‘number’
Example: z$ =
CHR$(64)
now z$ contains the
"@" character
number must be
between 0-255
|
CSSID$(object_id,
object_style)
|
Returns a string
containing the css representation of style defined for a given
object.
‘object_id’
represents the ID of the object to be styled.
‘object _style’
represents the property to be given to the object.
Check the chapter
about html objects for more details
|
DATE$[(format)]
|
Returns the actual
date with the format dd/mm/yy
The time takes into
account the Time Zone parameter defined into the "Config" page.
If ‘format’ is
specified, the format can be :
format = 1
=> American format M/D/Y
format = 2 =>
Canadian format Y/M/D
|
ESPNOW.ERROR$
|
Returns the MAC
address of the device(s) that didn’t received the message
|
ESPNOW.READ$
|
Returns the message
received from the ESP-NOW peer
|
ESPNOW.REMOTE$
|
Returns the MAC
address of the emitter of the message received
|
FILE.DIR$[(path$)]
|
Will search for
files and return the names of entries found.
'path$'
represents the directory name.
'path$' can
include wildcards characters as ‘*’, ‘.’ and ‘?’
The function will
return the first entry found.
To retrieve
subsequent entries use the function with no arguments. ie,
DIR$.
The return of an
empty string indicates that there are no more entries to
retrieve.
Example, to get all
the files present in the directory /html :
d$ =
FILE.DIR$("/html")
While D$ <>
""
Print d$
d$ =
FILE.DIR$
Wend
Valid wildcard
expressions are :
d$ =
FILE.DIR$(“/html/ex*.html”) ‘ returns all the files starting
with the “ex”
d$ =
FILE.DIR$(“/html/list.*”) ‘ returns all the files named
list.xxx
|
FILE.READ$(filename$,[line_num] | [start,
length])
|
Returns the content
of the file ‘filename$’.
Specifying
'line_num', only the corresponding line is read from the file.
If start and length
options are specified, the file is read from the ‘start’ position
for ‘length’ characters, otherwise the complete file is read in one
go.
The line number
starts from 1.
|
HEX$(number)
|
Returns the
Hexadecimal representation of the argument ‘number’
The number is
converted to integer before the conversion.
|
HtmlEventButton$
|
returns the name of the button that generates
the jump.
Useful to manage several buttons in the same
function
|
HtmlEventVar$
|
Returns the name of the variable changed
during the event onHtmlChange.
Useful to determine the object that changed
its value
|
IMAGE$(path [,id])
|
Returns a string
containing the html representation of an image.
‘Path’ represents
the url of the image; it can be local or from the internet.
‘id’ is an optional
argument and can be used to define the ID of the object (useful to
style it with CSS)
Check the chapter
about html objects for more details
|
IMAGEBUTTON$(path, label
[,id])
|
Returns a string
containing the html representation of an image that can be clicked
as a button.
‘Path’ represents
the url of the image; it can be local or from the internet.
‘label’ is the
GOSUB label where it will branch to when clicked,
‘id’ is an optional
argument and can be used to define the ID of the object (useful to
style it with CSS)
The function called
when clicking on the image must always terminate with the RETURN
command
Check the chapter
about html objects for more details
|
IP$
|
Returns the local
IP address, the Subnet mask and the Gateway address separated by
space.
Example:
Print IP$ ‘print
the complete address separated by single space
192.168.1.45
255.255.255.0 192.168.1.1
Print WORD$(IP$,1)
‘ will print only the IP
192.168.1.45
|
IR.GET$[ (param) ]
|
Returns the code
received by the IR receiver.
In function of the
param value, the function returns :
PARAM
|
RETURNED
VALUE
|
0 or
missing
|
Hexadecimal code
|
1
|
Decode
type
|
2
|
Address
|
3
|
Command
|
4
|
Bits
|
5
|
Repeat
|
Must be used in
association with the command IR.INIT and ONINFRARED
Example
IR.GET$ ‘ will
print the HEX code received
|
JSON$(string$, field$)
|
Will parse a json
string for a named data element within it.
If the element is
found, its value is returned in String format, else the text "not
found".
The key can have
the following syntax :
"Key.subkey.innerkey….." .
Array can
also be included such as "weather[5].description"
|
LCASE$(string$)
|
Returns ‘string$’
converted to lowercase characters
|
LED$(variable [,id])
|
Returns a string
containing the html representation of a led.
‘variable’
represents the variable associated with the led; changing the value
of the variable in the basic code will change the led from red (0)
to green ( any value not equal to 0).
The variable must
be Numerical.
‘id’ is an optional
argument and can be used to define the ID of the object (useful to
style it with CSS)
Check the chapter
about html objects for more details
|
LEFT$(string$, num)
|
Returns the
leftmost ‘num’ characters of ‘string$’
|
LISTBOX$(variable$,
"option1, option2, option3, ..." [, height] [,id])
|
Returns a string
containing the html representation of a listbox / combobox.
‘variable$’
represent the variable associated with the listbox;
changing the value
of the variable in the basic code will change also the value in the
html and vice-versa. The variable must be type String.
‘option1’,
‘option2’, …. represent the content of the listbox.
‘height’ is an
optional parameter and defines the height of the listbox; if not
specified, the object will be a combobox
‘id’ is an optional
argument used to define the ID of the object (useful to style it
with CSS).
When the value is
changed by the user, the event ‘onHtmlChange’ is triggered.
Check the chapter
about html objects for more details
|
MAC$[ (id) ]
|
Returns the active
MAC address. It consists of 6 hex bytes separated by colons.
It must be noted
that the MAC address can be different if the module is connected in
Station mode or in AP mode.
Example:
Print MAC$
62:01:94:5E:37:8D
Optionally it is
possible to select the address to be shown using the argument
‘id’
Example :
Print MAC$(0)
‘ print the Station mode address
60:01:94:5E:37:8D
Print MAC$(1) ‘
print the AP mode address
62:01:94:5E:37:8D
|
METER$(variable, min, max
[,id])
|
Returns a string
containing the html representation of a meter.
‘variable’
represents the variable associated with the slider; changing the
value of the variable in the basic code will change the value in
the html.
The variable must
be Numerical.
‘min’ and max
represent the minimum and maximum value of the meter.
‘id’ is an optional
argument which can be used to define the ID of the object (useful
to style it with CSS)
Check the chapter
about html objects for more details
|
MID$(string$, start
[,num])
|
Returns a substring
of ‘string$’ starting from ‘start’ with a length of ‘num’
characters. If ‘num’ is not defined, the result will continue until
the end of the line
Start must be
integer starting at 1
example:
z$="Hello
World"
wlog mid$(z$,4,5)
‘will print "lo Wo"
|
MQTT.Message$
|
Returns the MQTT message received
|
MQTT.Topic$
|
Returns the MQTT topic received
|
OCT$(number)
|
Returns the Octal
representation of the argument ‘number’
The number is
converted to integer before the conversion.
|
PASSWORD$(variable [, id]
)
|
Returns a string
containing the html representation of a password textbox..
‘variable’
represents the variable associated with the textbox; changing the
value of the variable in the basic code will change also the value
in the html and vice-versa. The variable can be Numerical or
String.
‘id’ is an optional
argument which can be used to define the ID of the object (useful
to style it with CSS)
Check the chapter
about html objects for more details
|
REPLACE$(expression$, find$,
replacewith$)
|
Returns a substring
of ‘expression$’ where any instances of the text inside ‘find$’ is
replaced with ‘replacewith$’
|
RIGHT$(string$, num)
|
Returns the
rightmost ‘num’ characters of ‘string$’
|
RTC.DATE$[(format)]
|
Returns the RTC
module date with the format dd/mm/yy
The module can be
DS1307 or DS3231
If ‘format’ is
specified, the format can be :
format = 1
=> American format M/D/Y
format = 2 =>
Canadian format Y/M/D
See also the
RTC.SETTIME and RTC.TIME$
NOTE : If no RTC is
connected, (or is not connected correctly) then will return
"165/165/165"
|
RTC.TIME$
|
Returns the RTC
module time with the format hh:mm:ss.
The module can be
DS1307 or DS3231
See also the
RTC.SETTIME and RTC.DATE$
NOTE : If no RTC is
connected, (or is not connected correctly) then will return
"45:165:165"
|
SERIAL.CHR$
|
Returns the first
character present in the input buffer of the serial port
Useful in
association with the command ONSERIAL
|
SERIAL.INPUT$
|
Returns all the
characters present in the input buffer of the serial port.
Useful in
association with the command ONSERIAL
|
SERIAL2.CHR$
|
Returns the first
character present in the input buffer of the serial port #2
Useful in
association with the command ONSERIAL
|
SERIAL2.INPUT$
|
Returns all the
characters present in the input buffer of the serial port #2
Useful in
association with the command ONSERIAL2
|
SLIDER$(variable, min, max
[,step] [,id])
|
Returns a string
containing the html representation of a slider.
‘variable’
represents the variable associated with the slider; changing the
value of the variable in the basic code will change also the value
in the html and vice-versa. The variable must be Numerical.
‘Min’ and max
represent the minimum and maximum value of the slider.
The optional
argument ‘step’ represents the minimal increment (by default the
value is 1).
‘id’ is an optional
argument which can be used to define the ID of the object (useful
to style it with CSS).
When the value is
changed by the user, the event ‘onHtmlChange’ is triggered.
Check the chapter
about html objects for more details
|
SPACE$(number)
|
Returns a string
consisting of the specified number of spaces.
|
SPI.STRING$(data$, len)
|
Write and receive a
string on the SPI bus.
Write the content
of ‘len’ characters of the string ‘data$’
Example:
a$ =
SPI.STRING("hello", 5)
|
SPI.HEX$(datahex$, len)
|
Write and receive
an HEX string on the SPI bus.
The string is a
sequence of hex characters (2 for each byte)
Write the content
of ‘len’ characters of the string ‘data$’
Example:
a$ =
SPI.HEX("A0B1C2D3E4F5", 6) ‘ send 6 bytes (sequence of A0, B1, C2,
D3, E4, F5) and receive the result in a$
|
STR$ (number [,format$
[,toint]])
|
Returns the
argument ‘‘number’ converted to string format.
The optional
‘format$’ permits to define how the number is printed.
The format is based
on ‘C’ printf command.
The last optional
format ‘toint’, if =1, permits to convert the number in
integer format. This is useful to convert the number in integer
format.
Example :
a = 12.34567890
Print STR$(a,
"%2.4f") ‘ will print 12.3456
Print STR$(a,
"%3.5f") ‘ will print 12.34567
a = 255
Print STR$(a,
"%04x", 1) ‘ will print 00FF ‘HEX
Print STR$(a,
"%04o", 1) ‘ will print 0377 ‘OCT
The formats
available are :
FORMAT
|
DESCRIPTION
|
TYPE
|
c
|
Char
|
Integer
|
d
|
Signed
Integer
|
Integer
|
e
|
Exponential
|
Float
|
f
|
Floating Point
|
Float
|
g
|
Use
shorter of the two formats
f or
e
|
Float
|
o
|
Octal
|
Integer
|
p
|
Pointer
(8 digits hex)
|
Integer
|
P
|
Pointer
without 0x
|
Integer
|
u
|
Unsigned Integer
|
Integer
|
x
|
Hexadecimal (lower case letters)
|
Integer
|
X
|
Hexadecimal (upper case letters)
|
Integer
|
The format must
observe the following rule :
%[integer_with][.][precision][format]
For example to
specify a floating number composed of 4 digits before the decimal
point and 3 digit after the point you must write : %4.3f
Example for several
formats
Format
|
Number
|
Result
|
%2.1f
|
14.33
|
14.3
|
28.128
|
28.1
|
%4.3f
|
15
|
15.000
|
4152.3751
|
4152.375
|
%1.4e
|
128
|
1.2800e+02
|
12852
|
1.2852e+02
|
%04f
|
12
|
0012
|
%4x
|
255
|
ff
|
%04X
|
255
|
00FF
|
|
STRING$(num, char$)
|
Returns
a string ‘num’ chars long composed of the char ‘char$’ - char$ can
also be a string of chars, eg: "<BR>" or " "
|
TEMPR$(pin_number
[,ID])
|
Returns
information from the DS18B20 temperature sensor
The
syntax is a$ = TEMPR$(pin_number [, ID])
The
‘pin number’ is any available pin of the device; it can change
between calls permitting to use several pins at the same time.
The ID
can be a number, a String, or not specified:
- If is
a number (say 'n'), the result will be the temperature (in °C) of
the nth device connected on that pin
- If is
a string, it must contains the Hex address of the device requested;
this address can be recovered using the command without this
argument
- If
not specified, the result will be the address list of the devices
connected on the pin (blocks of 8 bytes separated by ',')
Example
using 2 DS18B20 are connected on the pin 12 :
Print
TEMPR$(12,1) ‘ will print 20.5
Print TEMPR$(12,2)
‘ will print 22.3
Print
TEMPR(12) ‘will print 28ff5bdb701604f0,28ff5bdb7016045
Print
TEMPR(12,"28ff5bdb701604f0") ‘will print 20.5
|
TEXTBOX$(variable [, id]
)
|
Returns a string
containing the html representation of a textbox.
‘variable’
represent the variable associated with the textbox;
changing the value
of the variable in the basic code will change also the value in the
html and vice-versa. The variable can be Numerical or String.
‘id’ is an optional
argument which can be used to define the ID of the object (useful
to style it with CSS).
When the value is
changed by the user, the event ‘onHtmlChange’ is triggered.
Check the chapter
about html objects for more details
|
TRIM$(string$)
|
Returns ‘string$’
with the leading and trailing spaces removed
|
TIME$
|
Returns the actual
time with the format hh:mm:ss.
The time takes into
account the Time Zone parameter defined into the "Config" page.
|
UCASE$(string$)
|
Returns ‘string$’
converted to uppercase characters
|
UDP.READ$
|
Returns the UDP
message received, or an empty string if no message received.
Useful in
association with the command ONUDP
|
UDP.REMOTE$
|
Returns the IP
address and the port of the sender of the message received.
The format is IP:port (example 192.168.1.88:5541).
Useful in
association with the command ONUDP
|
UNIXDATE$(value
[,format])
|
Returns a date with
the format dd/mm/yy extract from ‘value’ given in UNIX format. The
value can be Numerical or String.
This is useful to
extract the date from the JSON string given by OpenWeatherApi
if ‘format’ is
specified, the format can be :
format = 1
=> American format M/D/Y
format = 2 =>
Canadian format Y/M/D
See also the
complementary DATEUNIX()
|
UNIXTIME$(value)
|
Returns a time with
the format hh:mm:ss extract from ‘value’ given in UNIX format. The
value can be Numerical or String.
This is useful to
extract the time from the JSON string given by OpenWeatherApi
See also the
complementary TIMEUNIX()
|
URLMSGGET$ ([arg$])
|
Get the message
received from the URL AJAX GET request.
Returns the value
of the url argument defined in arg$.
If arg$ is missing,
all the arguments are returned (useful for debugging).
Useful in
combination with ONURLMESSAGE and URLMSGRETURN
Example : if a
remote client makes the following url request :
http://esp_local_ip/msg?red=10&green=20&blue=30
Print
URLMSGGET$("red") ‘ will return 10
Print
URLMSGGET$("green") ‘ will return 20
Print
URLMSGGET$("blue") ‘ will return 30
Print URLMSGGET$()
‘ will return red=10&green=20&blue=30
More information here
|
WGET$( http_server$, port [,header] )
|
Returns the result
of a GET server request.
‘http_server$’ is
the server url request
‘port’ is the port
number; if port=443, the connection will be done using SSL
(secure).
‘Header’, if =1,
will include the header in the answer (useful for debug)
The program will
stop waiting for the answer.
Example :
print
WGET$("www.fakeresponse.com/api/?sleep=5", 80)
In this case the
program will stop 5 seconds waiting for the answer of the
server.
See the command
WGETASYNC to avoid this limitation.
|
WGETRESULT$
|
Return the message
received asynchronously from the command WGETASYNC
|
WORD$(string$, position
[,delimiter$])
|
This function
returns the nth word in the string, where n=1 or greater.
The string
delimiter is optional; when it is not used, the space character is
the delimiter.
Example :
a$ = "abc def ghi
ijk"
Print WORD$(a$,
3) ‘ will print ghi
b$ =
"the-!-quick-!-brown-!-fox"
Print WORD$(b$, 2,
"-!-") ‘ will print quick
See also
WORD.COUNT, WORD.FIND and WORD.DELETE$
|
WORD.DELETE$(string$, position [delimiter$])
|
This function
returns a string where the nth word has been deleted.
The string
delimiter is optional; when it is not used, the space character is
the delimiter.
Example :
a$ = "abc def ghi
ijk"
Print
WORD.DELETE$(a$, 3) ‘ will print abc def ijlk
b$ =
"the-!-quick-!-brown-!-fox"
Print
WORD.DELETE$(b$, 2, "-!-") ‘ will print the-!-brown-!-fox
See also WORD,
WORD.COUNT and WORD.FIND.
|
WORD.EXTRACT$(string$, lead$, trail$)
|
Returns the
substring included between lead$ and trail$.
Example
a$ = “https://www.google.com/test”
Print
WORD.EXTRACT$(a$, “https://”, “/test”) ‘ will print
www.google.com
|
WORD.GETPARAM$( setting$, parameter$
[,separator$])
|
Get a parameter
from a string containing a series of parameters stored as
below:
param1=value1
param2=value2
…….
paramx=valuex
‘setting$’ defines
the string containing the set of parameters
‘parameter$’
defines the parameters to be got.
‘separator$’ is an
optional parameter specifying a different separator character.
Example, assuming
that setting$ contains the parameters :
print
WORD.GETPARAM$(setting$, "param2")‘will print value2
By default the
separator is the character ‘=’.
Useful in
combination with WORD.SETPARAM and FILE.READ$
|
WPOST$(server$, body$, port [,header])
|
Returns the result
of a POST server request.
‘http_server$’ is
the server url request
‘body$’ is the
field that will be sent in the request
‘port’ is the port
number; if port=443, the connection will be done using SSL
(secure).
‘Header’, if =1,
will include the header in the answer (useful for debug)
The program will
stop while waiting for the answer.
Example :
print
WPOST$("ptsv2.com/t/annextest/post", "name=Annex&version=1.39",
80)
|
COMMANDS:
AUTOREFRESH interval
|
Same function of
the command REFRESH but with an automatic interval.
Define the
variables refresh interval in milliseconds.
This should never
be lower than 300ms due to performance reasons.
NOTE: It must be
run after the command CLS as it is managed into the javascript.
|
BAS.LOAD filename$
|
Loads another .bas
program and runs it immediately.
Returns 0 if the
successful or -1 if the file was not found
Example:
Print BAS.LOAD
"/test.bas"
|
BAS.RTCMEM$ = val$
|
Set the content of
the CPU RTC internal memory.
This memory
maintains the content between reset, so it is useful in association
with the SLEEP command when the module goes in low power mode.
This memory is
limited at 512 bytes, and can be read with the corresponding
command val$ = BAS.RCTMEM$
|
CLS
|
Clear
the html content of the page to all the clients connected by
Websockets.
Check
the chapter about html objects for more details
See
also the commands HTML, JSCALL, JSCRIPT, JSEXTERNAL, CSS and
WLOG
|
|
Send a CSS style
code to the page to all the clients connected by Websockets.
Check the chapter
about html objects for more details
See also the
commands HTML, JSCALL, JSCRIPT, JSEXTERNAL, CLS and WLOG
|
COMMAND cmd$
|
Permit to execute
any basic command defined into ‘cmd$’.
It acts as a macro
command like the immediate window
Example :
COMMAND ("print
sin(PI/2)") ‘will print 1
|
COUNTER.RESET cnt
|
Reset the counter
to 0 (count and period).
‘cnt” defines the
counter and can be 1 or 2
|
COUNTER.SETUP cnt, pin
[,mode]
|
Setup a counter in
association with a pin.
There are 2
counters that can count the number of pulses or the period between
pulses.
‘cnt” defines the
counter and can be 1 or 2
‘pin’ defines the
pin and can be any valid pin number
‘mode’ defines the
when the pulses are taken into account :
MODE
|
EDGE
|
1
|
On the RISING
edge
|
2
|
On the FALLING
edge
|
3
|
On CHANGE
|
If not
specified, the mode is 3 (on change)
|
CSSEXTERNAL file$
|
Define an external
css file to be used in the page of all the clients connected by
Websockets.
Check the chapter
about html objects for more details
See also the
commands CLS, HTML, JSCALL, JSCRIPT, CSS and WLOG
|
DATA const1 [,const2] ...
|
Stores numerical
and string constants to be accessed by READ.
String constant
must be between double quotes "
Expressions can be
used for the numerical constants (ex. PI * 2)
|
DHT.SETUP pin, model
|
Set the parameters
for Temperature / Humidity sensor DHT11, DHT21 or DHT22
The syntax is
DHT.SETUP pin, model
The pin number is
any available pin of the device;
The model can be
11, 21 or 22 (for DHT11, DHT21 or DHT22)
See also the
functions DHT.TEMP, DHT.HUM and DHT.HEATINDEX
|
EMAIL.SETUP server$, port, user_name$, password$ [,
debug]
|
Setup the
parameters for an SMTP server to be used to send e-mails.
This command must
be executed before using the command EMAIL or EMAILASYNC.
An SMTP account
like <mail.smtp2go.com> is required.
NEW : The command
uses an SSL connection, so it should work with any SMTP service
provider; the port should be 465
‘server$’ is the
url of the service provider (ex. mail.smtp2go.com)
‘Port’ is the port
required (ex. 465)
‘user_name$’ is the
login name of the SMTP account
‘password$’ is the
password of the SMTP account
All the parameters
are required.
The last optional
parameter ‘debug’ if set to 1, enables a debug mode useful to catch
connection problems.
Example :
EMAIL.SETUP
"mail.smtp2go.com", 465, "my_login", "my_pass"
|
EMAILASYNC from$, to$, subject$,
message$
|
Send an e-mail in
async mode; this means that the request is managed in the
background and the program will continue to run without
interruptions.
‘from$’ is the
email address of the sender (ex: from_me@yahoo.com)
‘to$’’ is the email
address of the receiver (ex: to_you@yahoo.com)
‘subject$’ is the
subject of the message
‘message$’ is the
content of the message
The sender and
receiver must be a valid email addresses.
Example :
EMAILASYNC
("from_me@yahoo.com", "to_you@gmail.com", "Important message " +
date$, "The memory available is " + str$(ramfree) )
|
FILE.SAVE filename$,
content$
|
Save the content of
‘content$’ in the file ‘filename$’[38] .
The file can be
read back using the function FILE.READ$(filename$).
File size is only
limited by available disk space (FFAT or external SD card)
|
FUSION.INIT
|
Initialise the
FUSION IMU / AHRS algorithm
|
FUSION.MADGWICK ax, ay, az,
gx, gy, gz
|
Execute the
MADGWICK 6 DOF algo
The input
parameters are the following :
PARAM
|
MEANING
|
UNITY
|
ax
|
Acceleration on x axis
|
g *
|
ay
|
Acceleration on y axis
|
g *
|
az
|
Acceleration on z axis
|
g *
|
gx
|
Gyro on x axis
|
°/sec
|
gy
|
Gyro on y axis
|
°/sec
|
gz
|
Gyro on z axis
|
°/sec
|
(*) the unit is not
really important but must be consistent between the group
This algo utilise
the variables FUSION.BETA and FUSION.ZETA
|
FUSION.MADGWICK ax, ay, az,
gx, gy, gz, mx, my, mz
|
Execute the
MADGWICK 9 DOF algo
The input
parameters are the following :
PARAM
|
MEANING
|
UNITY
|
ax
|
Acceleration on x axis
|
g *
|
ay
|
Acceleration on y axis
|
g *
|
az
|
Acceleration on z axis
|
g *
|
gx
|
Gyro on x axis
|
°/sec
|
gy
|
Gyro on y axis
|
°/sec
|
gz
|
Gyro on z axis
|
°/sec
|
mx
|
Magnetometer on x axis
|
milligauss *
|
my
|
Magnetometer on y axis
|
milligauss *
|
mz
|
Magnetometer on z axis
|
milligauss *
|
(*) the unit is not
really important but must be consistent between the group
This algo utilise
the variable FUSION.BETA
|
FUSION.MAHONY ax, ay, az,
gx, gy, gz, mx, my, mz
|
Execute the MAHONY
9 DOF algo
The input
parameters are the following :
PARAM
|
MEANING
|
UNITY
|
ax
|
Acceleration on x axis
|
g *
|
ay
|
Acceleration on y axis
|
g *
|
az
|
Acceleration on z axis
|
g *
|
gx
|
Gyro on x axis
|
°/sec
|
gy
|
Gyro on y axis
|
°/sec
|
gz
|
Gyro on z axis
|
°/sec
|
mx
|
Magnetometer on x axis
|
milligauss *
|
my
|
Magnetometer on y axis
|
milligauss *
|
mz
|
Magnetometer on z axis
|
milligauss *
|
(*) the unit is not
really important but must be consistent between the group
This algo utilise
the variables FUSION.KP and FUSION.KI
|
FUSION.BETA =
|
Set the BETA
parameter. This is used for the MADGWICK algo 6 DOF and 9 DOF.
|
FUSION.ZETA =
|
Set the ZETA
parameter. This is used for the MADGWICK algo 6 DOF.
|
FUSION.KI =
|
Set the KI
parameter. This is used for the MAHONY algo 9 DOF.
|
FUSION.KP =
|
Set the KP
parameter. This is used for the MAHONY algo 9 DOF.
|
HTML code$
|
Send html content
to the page of all the clients connected by Websockets.
Check the chapter
about html objects for more details
See also the
commands CLS, JSCALL, JSCRIPT, JSEXTERNAL, CSS and WLOG
|
I2C.SETUP sda_pin, scl_pin
[,freq [,stretch]]
|
Initiate the Wire library and join the I2C bus as a master. The
‘sda_pin’ and ‘scl_pin’ define the pins to be used as SDA and SCL
signals.
The
frequency (up-to 700 Khz) and the stretch timeout can also be
defined using the parameters ‘freq’ and ‘stretch’
Example:
I2C.SETUP 21, 22 ‘ define the pin 21 as SDA and the pin 22 as
SCL
|
I2C.BEGIN address
|
Begin a
transmission to the I2C slave device with the given address.
Subsequently, queue bytes for transmission with the I2C.WRITE
command and transmit them by calling I2C.END command.
‘address’ defines the 7-bit address of the device to transmit
to
Example:
I2C.BEGIN &h57 ‘ begins the transmission on the address hex
57
|
I2C.END
|
Ends a
transmission to a slave device that was begun by I2C.BEGIN and
transmits the bytes that were queued by I2C.WRITE.
Example:
I2C.END
It can
also returns a value indicating the status of the transmission:
0:success
1:data
too long to fit in transmit buffer
2:received NACK on transmit of address
3:received NACK on transmit of data
4:other
error
Example:
stat = I2C.END
|
I2C.REQFROM address,
length
|
Used by
the master to request bytes from a slave device. The bytes may then
be retrieved with the I2C.LEN and I2C.READ functions.
‘address’ defines the 7-bit address of the device to request bytes
from
‘Length’ defines the number of bytes to request
Example:
I2C.REQFROM &h57, 8 ‘ requests for 8 bytes from the address hex
57
|
I2C.READREGARRAY
i2c_address, register, nb_of_bytes, Array()
|
Read
a series of bytes from a slave device using a given device register
address.
The
result is copied into an array given as argument.
Each
received byte will be placed into an element of the array (starting
from 0).
The
array must be defined before the command with enough space to
receive the bytes.
Example :
Dim
MyArray(10) : i2c_addr = &h60 : register = 33 : length =
7
I2C.ReadRegArray i2c_addr , register, length , MyArray()
Will
read 7 bytes from the register address 33 on the device with i2c
address &h60.
The
result will be placed into MyArray where MyArray(0) will contain
the 1st received byte, MyArray(1) the 2nd, …..
For
clarification, this command is equivalent to the following
program:
i2c.begin i2c_addr
i2c.write register
i2c.end
i2c.reqfrom i2c_addr, length
for i = 0 to length - 1
MyArray(i) = i2c.read
next i
i2c.end
|
I2C.WRITE value
|
Writes
queues bytes for transmission from a master to slave device
(in-between calls to I2C.BEGIN and I2C.END).
‘value’
represents a value to send as a single byte
Example:
I2X.WRITE &h55
|
I2C.WRITEREGBYTE
i2c_address,register, value
|
Write a byte to a
slave device using a given device register address.
‘i2c_address’
define the I2C slave address
‘register’ defines
the device register
‘value’ defines the
value to be written into the device
Example:
i2c_addr = &h60
: register = 33 : value = 55
I2C.WriteRegByte
i2c_addr , register, value
Will write 55 in
the register address 33 on the device with i2c address
&h60.
For clarification,
this command is equivalent to the following program:
i2c.begin
i2c_addr
I2c.write
register
i2c.write
value
i2c.end
|
I2C.WRITEREGARRAY
i2c_address, register, nb_of_bytes, Array()
|
Write a series
of bytes to a slave device using a given device register
address.
The values to be
written are taken from an array given as argument.
Each byte must
be placed into an element of the array (starting from 0).
The array must
be defined before the command and set with the desired byte
sequence to be sent
Example
:
Dim MyArray(10)
: MyArray(0) = 12 : MyArray(1) = 34 : MyArray(2) = 56
i2c_addr =
&h60 : register = 33 : length = 3
I2C.WriteRegArray i2c_addr , register, length ,
MyArray()
Will write 3
bytes to the register address 33 on the device with i2c address
&h60.
The sequence 12,
34, 56 will be written to the device
For
clarification, this command is equivalent to the following
program:
i2c.begin
i2c_addr
i2c.write
register
for i = 0
to length - 1
i2c.write MyArray(i)
next
i
i2c.end
|
INPUT.TIMEOUT timeout
|
Define the time (in
milliseconds) that the INPUT command will wait for an input from
the serial port (console). After this time the INPUT will return an
empty value.
INPUT.TIMEOUT 0
removes the timeout
|
INPUT["prompt$";]
variable
|
Allows input from
the console to a variable.
The input command
will prompt with a question mark (?).
If the "prompt
string$" is specified it will be printed before the question
mark.
During the input
command the execution of the program will be stopped waiting for an
input from the serial port. This can be an issue as the program can
get stuck.
The command
INPUT.TIMEOUT will permit to interrupt the command after a given
timeout duration to prevent it waiting for input indefinitely.
|
INTERRUPT pin_no, {OFF |
label}
|
Specify a branch
label for the interrupt to jump to when the designated input pin
signal changes.
‘Pin_no’ defines
the input pin - can be from 0 to 39
‘Label’ is the
branch label where it will jump to ;
putting OFF
instead of the label will remove the interrupt
Example
INTERRUPT 5,
pin5_change
|
IR.INIT pin_rx | OFF [,
pin_tx]
|
Initialise the IR
receiver and the IR transmitter
‘pin_rx’ is the pin
where the IR receiver is connected
‘pin_tx’ is the pin
where the IR led is connected
If ‘pin_rx’ is OFF,
the receiver is disabled
If ‘pin_tx’ is not
defined, the transmitter is disabled
Example :
IR.INIT 14, 12
‘define the pin 14 for the receiver and the pin 12 for the
transmitter
|
IR.SEND type, code$,
bits
|
Send a code via the
IR transmitter
‘type’ is the type
of RC (3 = NEC, ...)
‘code$’ is the code
in hexadecimal format
‘bits’ is the
number of bits (32, ...)
|
JSCALL javaCode$
|
Send javascript
content to the page of all the clients connected by Websockets.
Check the chapter
about html objects for more details
See also the
commands CLS, HTML, JSCRIPT, JSEXTERNAL, CSS and WLOG
|
JSCRIPT script$
|
Execute a
javascript content in the page of all the clients connected by
Websockets.
Check the chapter
about html objects for more details
See also the
commands CLS, HTML, JSCALL, JSEXTERNAL, CSS and WLOG
|
JSEXTERNAL file$
|
Define an external
javascript file to be used in the page of all the clients connected
by Websockets.
Check the chapter
about html objects for more details
See also the
commands CLS, HTML, JSCALL, JSCRIPT, CSS and WLOG
|
LCD.INIT address, cols,
rows
|
Initialize a LCD
display connected using I2C to the module.
‘address’ is the
I2C slave address of the LCD display
‘cols’ is the
number of columns of the LCD display
‘rows’ is the
number of rows of the LCD display
Before using it,
the I2C bus must be initialised with the command I2C.SETUP
Example:
I2C.SETUP 4,5 ‘init the I2C on pins 4 and 5
LCD.INIT 63, 20, 4 ‘init the LCD at I2C address 63 with 20
columns and 4 rows
LCD.PRINT 1,1 "HELLO WORLD"
|
LCD.CLS
|
Clear the content
of the LCD display connected using I2C to the module
|
LCD.PRINT x, y, text$
|
Print a text on the
LCD.
‘x’ and ‘y’ define
the position where ‘text$’ will be printed
|
LOCAL var1 [,var2], ...
|
Defines local
variables inside user named subroutines.
Using this command
inside the subroutines, permits to create variables that exist only
during the routine; they will vanish at the end of the routine.
This will permit also to avoid to unintentionally modify variables
that have the same name which were already used elsewhere in the
code.
See the paragraph
"Scope of the variables" for more details.
Example:
LOCAL I,
A$
|
MAXDISPLAY.SETUP CS_pin
|
Setup a
8 digit 7-segments display based on the chip MAX7219.
The display must be
connected using the SPI bus plus a CS_pin.
‘CS_pin’ defines the pin used for the CS signal
Example:
MAXDISPLAY.SETUP 15
|
MAXDISPLAY.PRINT msg$
[,‘brightness]
|
Print a
message on the 8 digit 7-segments MAX7219 display.
All ASCII
characters can be used but will be shown within the limitation of
the 7 segments of the display.
‘msg$’ defines the
message to be printed
‘brightness”
defines the luminosity of the display from 0 (blank) to 15
(max)
By default the
luminosity is at 15
|
MAXSCROLL.SETUP nb_devices,
CS_pin
|
Set Up
a DotMatrix chain display based on the chip MAX7219.
The
chain can be composed by one or more modules in daisy chain.
The
display must be connected using the SPI bus plus a CS_pin.
‘Nb_devices’ defines how many modules are connected
‘CS_pin’ defines the pin used for the CS signal
Example
for a 4 digit module available on ebay :
MAXSCROLL.SETUP 4, 15 ‘ 4 digits, CS on pin 15
|
MAXSCROLL.PRINT msg$
|
Print a
message on the DotMatrix Display.
The
message will be shown using the command MAXSCROLL.SCROLL
‘msg$’
defines the message to be shown
|
MAXSCROLL.NEXT msg$
|
Define
the message that will be shown on the DotMatrix Display as soon as
the message set with the command MAXSCROLL.PRINT is terminated.
Permit
to maintain a continuity on the message shown.
‘msg$’
defines the message that will be printed
|
MAXSCROLL.TEXT msg$
|
Set a new message
without resetting the message at the initial position.
Useful to modify
the message while it’s already scrolling.
‘msg$’ defines the
new message to be shown
|
MAXSCROLL.SHOW pos [,
brightness]
|
Show in a given
position the message defined with the command MAXSCROLL.PRINT or
the command MAXSCROLL.NEXT
‘Pos’ define the
position of the message (in pixels)
‘brightness”
defines the luminosity of the display from 0 (blank) to 15
(max)
The position 1 if the rightmost line of the
display and increasing this value will move the text more on the
left. Decrementing (negative numbers) this value will move the text
more on the right.
|
MAXSCROLL.SCROLL
[brightness]
|
Execute
a single pixel scroll from the right to left of the message set on
the DotMatrix display. In order to maintain a continuity of the
scrolling, this command must be called on a timed interval (using a
timer)
‘brightness”
defines the luminosity of the display from 0 (blank) to 15
(max)
|
MAXSCROLL.OSCILLATE
[brightness]
|
Execute a single
pixel scroll oscillating the message set on the DotMatrix display.
In order to maintain a continuity of the scrolling, this command
must be called on a timed interval (using a timer)
‘brightness”
defines the luminosity of the display from 0 (blank) to 15
(max)
|
NEO.PIXEL led_pos, R, G, B
[, disable]
|
Set, in
a stripline, the led at position 'led_pos' with the color
R,G,B.
The
optional argument 'disable' (if = 1) is useful for updating several
pixels together; it will write the new value into memory, but it
will not be displayed until the next non-‘disable’ write causes all
‘disabled’ pixels to display their updated values at the same
time.
|
NEO.PIXEL led_pos, COLOR [,
disable]
|
Set, in a
stripline, the led at position 'led_pos' with the color
‘COLOR’.
The content of
‘COLOR’ is a merged color value; it can be generated using the
function NEO.RGB().
The optional
argument 'disable' (if = 1) will permit to write in the memory
without refreshing the strip; this is useful to show several leds
at the same time
|
NEO.SETUP pin [,nb_led]
|
The
NEOPIXEL are led strips based on the WS2812 Leds
define
the pin to be used for the NEO PIXEL commands
‘Pin’
define the pin number to be used
Optionally it is possible to define the number of leds presents in
the string.
By
default the strip contains 512 leds.
NOTE:
it is recommended to define the number of leds to have a faster
refresh, in particular for small strips.
|
NEO.STRIP led_start_pos,
led_end_pos, R, G, B [, disable]
|
Set, in
a stripline, the leds from the position 'led_start_pos' to
'led_end_pos' with the color R,G,B.
The optional
argument 'disable' (if = 1) will permit to write in the memory
without refreshing the strip; this is useful to show several leds
at the same time
|
NEO.STRIP led_start_pos,
led_end_pos, COLOR [, disable]
|
Set, in a
stripline, the leds from the position 'led_start_pos' to
'led_end_pos' with the color ‘COLOR’
The content of
‘COLOR’ is a merged color value; it can be generated using the
function NEO.RGB().
The optional
argument 'disable' (if = 1) will permit to write in the memory
without refreshing the strip; this is useful to show several leds
at the same time
|
NEOSCROLL.SETUP nb_devices,
pin [,serpentine]
|
Set Up a NeoMatrix
chain display based on WS2812 dot matrix led modules.
The chain can be
composed by one or more modules in daisy chain.
The display must be
connected using a single pin
‘Nb_devices’
defines how many modules are connected
‘pin’ defines the
pin used for the signal
‘Serpentine’
defines if the display is arranged as a serpentine; can be 0
(normal) or 1 (serpentine). By default is 0.
Example for a 4
digit module available on ebay :
NEOSCROLL.SETUP 4,
15 ‘ 4 digits, using the pin 15
|
NEOSCROLL.PRINT msg$
|
Print a message on
the NeoMatrix Display.
The message will be
shown using the command NEOSCROLL.SCROLL
‘msg$’ defines the
message to be shown
|
NEOSCROLL.NEXT msg$
|
Define the message
that will be shown on the NeoMatrix Display as soon as the message
set with the command NEOSCROLL.PRINT is terminated.
Permit to maintains
a continuity on the message shown.
‘msg$’ defines the
message that will be printed
|
NEOSCROLL.COLORS col$
|
Defines the colors
associated with the character to be shown on the NeoMatrix display.
The logic of the colors is described in the specific NeoMatrix
chapter
|
NEOSCROLL. NEXTCOLORS
col$
|
Defines the colors
of the message defined with the command NEOSCROLL.NEXT
|
NEOSCROLL.SHOW pos [,
brightness]
|
Show in a given
position the message defined with the command NEOSCROLL.PRINT or
the command NEOSCROLL.NEXT
‘Pos’ define the
position of the message (in pixels)
‘brightness”
defines the luminosity of the display from 0 (blank) to 255
(max)
The position 1 if the rightmost line of the
display and increasing this value will move the text more on the
left. Decrementing (negative numbers) this value will move the text
more on the right.
|
NEOSCROLL.TEXT msg$
|
Set a new message
without resetting the message at the initial position.
Useful to modify
the message while it’s already scrolling.
‘msg$’ defines the
new message to be shown
|
NEOSCROLL.SCROLL
[‘brightness]
|
Execute a single
pixel scroll from the right to left of the message set on the
DotMatrix display. In order to maintain a continuity of the
scrolling, this command must be called on a timed interval (using a
timer)
‘brightness”
defines the luminosity of the display from 0 (blank) to 255
(max)
|
NEOSCROLL.OSCILLATE
[‘brightness]
|
Execute a single
pixel scroll oscillating the message set on the DotMatrix display.
In order to maintain a continuity of the scrolling, this command
must be called on a timed interval (using a timer)
‘brightness”
defines the luminosity of the display from 0 (blank) to 255
(max)
|
OLED.CLS
|
Clear the content
of the OLED display connected using I2C to the module
|
OLED.INIT orientation
|
Initialize an OLED
display connected using I2C to the module.
‘orientation’ is a
number that can be 0 or 1 specifying the orientation:
0
|
Landscape
|
1
|
Landscape
reversed
|
The OLED predefined
I2C address is 60 (3c in hex).
Before using it,
the I2C bus must be initialised with the command I2C.SETUP
Example :
I2C.SETUP 21,
21 ' set I2C port on pins 21 and 22
OLED.INIT 1 ‘ init
OLED at landscape reversed
|
OLED.REFRESH fmt
|
Defines
how the image is sent on the OLED after each drawing command.
If
‘fmt’ = 1, the image is automatically refreshed after each drawing
command.
If
‘fmt’ = 0, the image must be manually refreshed with OLED.REFRESH
0
This
method provides a double buffer permitting to draw several objects
on the screen avoiding flickering.
|
OLED.COLOR color
|
Set the
color used by the OLED drawing commands.
The
color is defined as above:
0
|
Black
|
1
|
White
|
2
|
Reverse
|
|
OLED.PIXEL x, y
|
Draw a
pixel at the position x, y on the OLED display
|
OLED.LINE x1, y1, x2,
y2
|
Draw a line between
the point (x1,y1) and the point (x2,y2) on the OLED
display
|
OLED.RECT x,y, width, height
[,fill]
|
Draw a rectangle at the point (x,y) with the
specified width, height on the OLED.
Specifying 1 for the argument fill, the
rectangle will be filled.
|
OLED.CIRCLE x, y, radius [,
fill]
|
Draw a circle at the point (x,y) with the
specified radius on the OLED display.
Specifying 1 for the argument fill, the circle
will be filled.
|
OLED.FONT font_num
|
Set the font used
by the OLED.PRINT command.
The font_num is
defined as above (by default the font 1 is selected)
1
|
Arial MT 10
|
Width : 10px
|
Height:13px
|
2
|
Arial MT 16
|
Width : 16px
|
Height:19px
|
3
|
Arial MT 24
|
Width : 24px
|
Height:28px
|
|
OLED.PRINT x, y, text$
[background]
|
Print a
text on the OLED display.
‘x’ and
‘y’ define the position where ‘text$’ will be printed.
An
optional ‘background’ parameter permit to specify the background
color.
|
OLED.IMAGE x, y, image$
|
Shows
an image in XBM format from the internal disk on the OLED
display.
‘X’ and
‘y’ define the position where the image will be shown
‘image$’ is the name of the file containing the image
|
ONERROR ABORT or ONERROR IGNORE or ONERROR SKIP [nn] or ONERROR
CLEAR or ONERROR GOTO label
|
This controls the
action taken if an error occurs while running a program and applies
to all errors including syntax errors.
ONERROR ABORT will
display the error message and abort the program. This is the normal
behaviour and is the default when a program starts running.
ONERROR IGNORE will
cause any error to be ignored.
ONERROR SKIP will
ignore an error in a number of commands (specified by the number
'nn') executed following this command. 'nn' is optional, the
default if not specified is one.
After the number of
commands has completed (with an error or not) the behaviour will
revert to ONERROR ABORT.
If an error occurs
and is ignored/skipped the read only variable BAS.ERRNUM will be
set to non zero and BAS.ERRMSG$ will be set to the error message
that would normally be generated. These are reset to zero and an
empty string by ONERROR CLEAR. They are also cleared when the
program is run and when ONERROR IGNORE and ONERROR SKIP are used.
ONERROR IGNORE can make it very difficult to debug a program so it
is strongly recommended that only ONERROR SKIP be used.
In addition the
command ONERROR GOTO label permits to define a routine that can
manage the error; issuing RETURN inside this routine, will return
to the line following the error.
|
ONESPNOWERROR [label | OFF]
|
Define the label
where the program will jump when an error occurs during the
transmission of an ESP-NOW message.
This happen, in
particular, when the receiver device has not received the
message
|
ONESPNOWMSG [label | OFF]
|
Define the label
where the program will jump when an ESP-NOW message is received
|
ONGESTURE [label | OFF]
|
Define a label
where the program will jump when the APDS9960 sensor detects a
gesture. To disable ONGESTURE OFF
|
ONHTMLCHANGE [label |
OFF]
|
Define
a label where the program will jump when an html object present in
the output html page changes its value. The code must be terminated
with ‘RETURN’.
To
disable ONHTMLCHANGE OFF
|
ONHTMLRELOAD [label |
OFF]
|
Define a label
where the program will jump when a reload of the output html page
is requested or a new client connects to this page. The code must
be terminated with ‘RETURN’. To disable ONHTMLRELOAD OFF
|
ONINFRARED label
|
Define a label
where the program will jump when an IR code is received by the
Infrared receiver. The script branch must be terminated with
‘RETURN’.
To disable
ONINFRARED OFF
|
ONMQTT label
|
Define a label where the program will jump
when an MQTT message is received
The script branch
must be terminated with ‘RETURN’.
To disable ONMQTT
OFF
|
ONSERIAL [label | OFF]
|
Define a label
where the program will jump when a message is received on the
serial port (console). The code must be terminated with
‘RETURN’.
To disable ONSERIAL
OFF
|
ONSERIAL2 [label | OFF]
|
Define a label
where the program will jump when a message is received on the
serial port #2. The code must be terminated with ‘RETURN’
To disable
ONSERIAL2 OFF
|
ONTOUCH [label | OFF]
|
Define a label
where the program will jump when the TFT screen is touched. The
code must be terminated with ‘RETURN’
To disable ONTOUCH
OFF.
Useful in
combination with the functions TOUCH.X and TOUCH.Y
|
ONUDP [label | OFF]
|
Define a label
where the program will jump when a UDP message is received. The
code must be terminated with ‘RETURN’.
To disable ONUDP
OFF
|
ONURLMESSAGE [label |
OFF]
|
Define a label
where the program will jump when a URL AJAX GET request is
received. This is typically when the url http://local_ip/msg?param=value is
accessed. For more detail refers to the dedicated paragraph..
To disable
ONURLMESSAGE OFF.
Useful in
combination with URLMSGRETURN and URLMSGGET$
More information here
|
ONWGETASYNC [label |
OFF]
|
Define a label
where the program will jump when a WGETASYNC message is received.
The code must be terminated with ‘RETURN’.
To disable
ONWGETASYNC OFF
|
OPTION.CPUFREQ 80|160
|
Define CPU speed in
Mhz of the module.
The value can be 80
or 160. The default value is 160Mhz.
Setting the speed
at 80Mhz, will divide by 2 the speed of the module but lower the
power requirement of the module by around 5mA
|
OPTION.LOWRAM value
|
Define the RAM
available lower limit. If during the execution of the program this
limit is reached, the program automatically stops with an OUT OF
MEMORY error message. By default the value is defined at 10000.
As it introduces a
little overhead, it can be disabled setting this option at 0
(however this is not recommended).
|
PAUSE delay
|
Pause the module
for ‘delay’ milliseconds.
During the pause,
all the activities are not suspended (it is non-blocking).
This means that all
interrupts will continue to be managed.
|
PCA9685.SETUP addr
|
Setup a PWM / SERVO
drive module based on the chip PCA 9685.
This module must be
connected using the bus I2C.
‘Add’ defines the
I2C address of the chip (normally 64)
Example:
PCA9685.SETUP 64 ‘
set the module at the I2C address 64 (40 in hexadecimal)
|
PCA9685.SETFREQ freq
|
Set the PWM
frequency of the PWM / Servo module PCA 9685
‘Freq’ defines the
frequency of the PWM signal
The value can be
from 24 Hz to 1526 Hz.
To drive servos,
the frequency must be 50 Hz
Example:
PCA9685.SETFREQ 50
‘ set the PWM frequency at 50 Hz
|
PCA9685.PWM pin, value
|
Set the PWM signal
on one of the 16 outputs of the PCA9685 module.
‘Pin’ can be from 0
to 15
‘Value’ can be from
0 to 4095.
Example:
PCA9685.PWM 0, 2048
‘ put the output 0 at 50% duty cycle
|
|
Initialise the PID
controller with the Kp, Ki, and Kd parameters.
As there are 4 PID
controllers, the prefix can be PID1, PID2, PID3 or PID4.
|
|
Set the output
limits of the given PID controller.
If not defined the
limits are defined as 0 to 255.
As there are 4 PID
controllers, the prefix can be PID1, PID2, PID3 or PID4.
|
|
Set the sampling
period for the given PID controller.
If not defined the
default value is 100 msec.
As there are 4 PID
controllers, the prefix can be PID1, PID2, PID3 or PID4.
|
|
Modify the PID
parameters for the given PID controller.
As there are 4 PID
controllers, the prefix can be PID1, PID2, PID3 or PID4.
|
|
Set the working
mode of the given PID controller.
If ‘mode’ is set to
0, the controller will be stopped and the output value will be
frozen.
By default the
‘mode’ is set to 1.
As there are 4 PID
controllers, the prefix can be PID1, PID2, PID3 or PID4.
|
[43] PIN(pin_number) =
val
|
Set the value of
any external I/O pin.
The pin_number
refers to GPIO and can be from 0 ... 5 or 12 ...33
The val can be 0 or
1 to set the pin to LOW or HIGH
Before being used,
the pin must be set as OUTPUT with the command PIN.MODE
|
PIN.MODE pin_number, mode
[,PULLUP | PULLDOWN ]
|
Set any pin to
digital mode as input or output.
The ‘pin_number’
can be from 0 to 39.
The ‘mode can’ be
INPUT or OUTPUT or SPECIAL
The optional
parameter PULLUP permits to add a weak pullup resistor on the
pin.
The optional
parameter PULLDOWN permits to add a weak pulldown resistor on the
pin.
The mode SPECIAL
can be used to restore the normal functionality to any pin.
For example, if the
pin GPIO1 (normally assigned to the TX functionality) has been
defined as input (with the command PIN.MODE 1, INPUT), its normal
functionality can be restored with the command
PIN.MODE 1,
SPECIAL
|
PLAY.MP3 mp3$
|
Play
mp3 files stored in the internal disk or from the SD card.
The sound is played in the background, even if
the program is stopped, until the end of the record or executing
the command PLAY.STOP.
Example:
PLAY.MP3 “/mp3/music.mp3”
|
PLAY.NETWORKS stream$
|
Play an
mp3 streaming web radio.
The sound is played in the background, even if
the program is stopped, until the execution of the command
PLAY.STOP.
Example:
PLAY.NETWORKS
"http://91.121.159.124:8000/eko-des-garrigues-128k.mp3"
|
PLAY.SETUP dest
[,buffer]
|
Set the
destination output for the sound player commands.
If
‘dest = 0’, the sound will be sent to the internal speaker (pin
GPIO25) (mono)
If
‘dest = 1’, the sound will be sent to the external DAC (stereo)
The optional argument ’buffer’ defines the
size of the memory block allocated as output buffer. Its value is 8
by default and can be increased up to 64.
Increasing the size of the buffer will permit
to reduce some glitches that may occur in case of strong WiFi
activity.
Example:
PLAY.SETUP 1 ‘ define the output to the external DAC
|
PLAY.SPEAK message$ [,
phonetic]
|
Speaks
a vocal message using the internal SAM speech synthesizer.
The
message must be composed of english words and limited to 255
characters.
It can
optionally talk using phonemes; in this case ‘phonetic’ must be
1.
Example
:
PLAY.SPEAK “The quick brown fox jumps over the
lazy dog”
|
PLAY.STOP
|
Stop
the playing of sound
|
PLAY.VOICE "message", "language" [, "filename"] [,
action]
|
Speaks a vocal message using the voice
synthesis available in google translate.
|
PLAY.VOLUME volume
|
Defines
the output volume.
It can
be from 0 to 100 but greater than 100 values are accepted if the
sound file was recorded with low volume
Example:
PLAY.VOLUME 50 ‘ set the sound at 50%
|
PLAY.WAV
|
Play wav files
stored in the internal disk or from the SD card.
The sound is played in the background, even if
the program is stopped, until the end of the record or executing
the command PLAY.STOP.
Example:
PLAYWAV “/wav/music.wav”
|
PRINT expression[[,;
]expression] ...
|
Outputs
text to the serial port (console)
Multiple expressions can be used and must be separated by either
a:
-
Comma (,) which will output the tab character
-
Semicolon(;) which will not output anything (it is just used to
separate expressions).
A
semicolon (;) at the end of the expression list will suppress the
automatic output of a carriage return/ newline at the end of a
print statement.
Integers (whole numbers) are printed without a decimal point while
fractions are printed with the decimal point and the significant
decimal digits. Large floating point numbers are printed in
scientific number format.
|
PRINT2 expression [[,;
]expression] ...
|
Outputs text to the
serial port #2.
Multiple
expressions can be used and must be separated by either a:
-
Comma (,) which will output the tab character
-
Semicolon(;) which will not output anything (it is just used to
separate expressions).
A semicolon (;) at
the end of the expression list will suppress the automatic output
of a carriage return/ newline at the end of a print statement.
Integers (whole
numbers) are printed without a decimal point while fractions are
printed with the decimal point and the significant decimal digits.
Large floating point numbers are printed in scientific number
format.
|
PWM.SETUP pin, chan,
default, [,freq] [,resol]
|
Attach a PWM
channel to a given output pin.
‘pin’ can be any
output pin
‘chan’ can be from
0 to 15.
‘default is the
initial pwm value set to the output
‘freq’ is the pwm
frequency; by default is 10KHz
‘resol’ is the
resolution; by default is 8bits
Frequency limits depend on resolution.
For duty resolution of 8 bits, the maximal
frequency is 312.5 kHz.
The available duty levels are (2^bit_num)-1,
where bit_num can be 1-15.
The maximal frequency is 80000000 /
2^bit_num
NOTE for the M5stack:
The channel 0 is dedicated to the internal
speaker (pin 25)
The channel 7 is dedicated to the TFT
backlight (pin 32)
See the PWM chapter for more details
|
PWM.SETUP pin, OFF
|
Detach the pin from
the PWM output.
|
PWM.OUT chan, value
|
Set a given value
to the PWM channel.
The channel is
associated to a given pin with the command PWM.SETUP
‘chan’ can be from
0 to 15
‘value’ can be from
0 to the max defined by the resolution (by default 0 to 255)
|
READ var1 [,var2] ...
|
Reads values from
DATA statements and assigns these values to the named variables.
Variable types in a READ statement must match the data types in
DATA statements as they are read.
See also DATA and
RESTORE.
|
REBOOT
|
Reboots the module
(software reset)
|
REFRESH
|
Refresh (sync) the
variables in the basic code with the corresponding variables in the
input html page (one shot)
|
RESTORE
|
Resets the line and
position counters for the READ statement at the beginning.
|
RTC.SETTIME Year, Month,
Day, Hours, Minutes, Seconds
|
Set the RTC module
(DS1307 or DS3231) with the supplied date / time
‘Year’ can be from
0 (for 2000) to 99 (for 2099)
‘Month’ can be from
1 (january) to 12 (december)
‘Day’ can be from 1
to 31
‘Hours’ can be from
0 to 23
‘Minutes’ can be
from 0 to 59
‘Seconds’ can be
from 0 to 59
See also RTC.DATE$
and RTC.TIME$
|
SERIAL.BYTE ch1 [,ch2] . .
.
|
Send one or more
byte to the serial port (console).
The bytes can be
one or more separated by a comma.
The values can be
any value from 0 to 255.
Example :
SERIAL.BYTE
&h10, &h00, &h12, &h09
|
SERIAL2.BYTE ch1 [,ch2] . .
.
|
Send one or more
byte to the serial port #2.
The bytes can be
one or more separated by a comma.
The values can be
any value from 0 to 255.
Example :
SERIAL2.BYTE
&h10, &h00, &h12, &h09
|
SERIAL.MODE baudrate
|
Set the speed for
the Serial Port (console)
The format is fixed
to 8 bits No parity 1 bit stop.
‘baudrate’ defines
the speed (can be any allowed value)
|
SERIAL2.MODE baudrate,
pin_tx, pin rx
|
Set the speed and
the pins for the serial port #2
It is possible to
specify any pin for the TX and RX signals.
The format is fixed
to 8 bits No parity 1 bit stop.
‘baudrate’ defines
the speed (can be any allowed value)
‘pin_tx’ defines
the pin for the TX signal
‘pin_rx’ defines
the pin for the RX signal.
|
SERVO id, value
|
Set the
angle of servo connected on the channel ‘id’
‘id’
defines the servo channel (from 1 to 4)
‘Value’
is the desired angle (from 0 to 180)
The pin
is defined by the command SERVO.SETUP
|
SERVO.SETUP id, pin_number |
OFF
|
Define the pin that
must be used by the servo channel.
‘id’ defines the
servo channel (from 1 to 4)
The ‘pin_number’
can be from 0 to 16.
To detach the pin,
use ‘OFF’ instead of the pin_number
|
SETTIME Year, Month, Day,
Hours, Minutes, Seconds
|
Set the internal
timekeeper with the supplied date / time
‘Year’ can be from
70 (for 1970) to 38 (for 2038); values >100 are accepted so 2017
can be specified as 17 or 117.
‘Month’ can be from
1 (january) to 12 (december)
‘Day’ can be from 1
to 31
‘Hours’ can be from
0 to 23
‘Minutes’ can be
from 0 to 59
‘Seconds’ can be
from 0 to 59
|
SLEEP value
|
Put the ESP in deep
sleep (low energy) for 'value' seconds.
At the end of the
period, the unit will reboot and reload the default basic
program.
Note : GPIO16 must
be connected to RST pin to wakeup from sleep
NOTE: Maximum
time is 4294 seconds (around 71 minutes[44] )
|
SOCKET client, msg$
|
Send a WebSocket
message only to a specific client.
It will probably
be removed.[45]
‘client’ is the
number of the client
‘msg$’ is the
message to be sent
|
SPI.SETUP speed [,data_mode
[, bit_order]]
|
Initialise the SPI
port with the speed (bits/sec)
The speed can be
max 80000000 (80MHz for CPU running at 160MHz)
The optional
parameters are:
data_mode : can be
0 (default) 1, 2 or 3.
bit_order : can be
0 (lsb_first) or 1 (msb_first - default)
|
ST7920.INIT CS_pin
|
Initialize an
ST7920 display connected using SPI to the module.
‘CS_pin’ defines
the pin used for the CS signal
This command
initialise automatically the SPI bus at 1 Mhz (max frequency
allowed by the display)
Example :
ST7920.INIT 15 ‘
init the ST7920 with the CS at pin 16
|
ST7920.CLS
|
Clear the content
of the ST7920 display connected using SPI to the module
|
ST7920.REFRESH fmt
|
Defines how the
image is sent on the ST7920 after each drawing command.
If ‘fmt’ = 1, the
image is automatically refreshed after each drawing command.
If ‘fmt’ = 0, the
image must be manually refreshed with ST7920.REFRESH 0
This method
provides a double buffer permitting to draw several objects on the
screen avoiding flickering.
|
ST7920.COLOR color
|
Set the color used
by the ST7920 drawing commands.
The color is
defined as above:
0
|
Black
|
1
|
White
|
2
|
Reverse
|
|
ST7920.PIXEL x, y
|
Draw a pixel at the
position x, y on the ST7920 display
|
ST7920.LINE x1, y1, x2,
y2
|
Draw a line between
the point (x1,y1) and the point (x2,y2) on the ST7920
display
|
ST7920.RECT x,y, width,
height [,fill]
|
Draw a rectangle at the point (x,y) with the
specified width, height on the ST7920.
Specifying 1 for the argument fill, the
rectangle will be filled.
|
ST7920.CIRCLE x, y, radius
[, fill]
|
Draw a circle at the point (x,y) with the
specified radius on the ST7920 display.
Specifying 1 for the argument fill, the circle
will be filled.
|
ST7920.FONT font_num
|
Set the font used
by the ST7920.PRINT command.
The font_num is
defined as above (by default the font 1 is selected)
1
|
Arial MT 10
|
Width : 10px
|
Height:13px
|
2
|
Arial MT 16
|
Width : 16px
|
Height:19px
|
3
|
Arial MT 24
|
Width : 24px
|
Height:28px
|
|
ST7920.PRINT x, y, text$
[background]
|
Print a text on the
ST7920 display.
‘x’ and ‘y’ define
the position where ‘text$’ will be printed.
An optional
‘background’ parameter permits to specify the background color.
|
ST7920.IMAGE x, y,
image$
|
Shows an image in
XBM format from the internal disk on the ST7920 display.
‘X’ and ‘y’ define
the position where the image will be shown
‘image$’ is the
name of the file containing the image
|
TM1637.PRINT msg$ [,
brightness [, dotpoints]]
|
Print a message on
the display TM1637. The message can be up-to 4 chars. All ASCII
characters can be used but will be shown within the limitation of
the 7 segments of the display.
‘msg$’ defines the
message to be printed
‘brightness”
defines the luminosity of the display from 0 (blank) to 7 (max)
‘dotpoints’ defines
if the two points in the middle of the display, can be ON (255) or
OFF (0).
By default the
luminosity is at 7 and the dotpoints OFF
|
TM1637.SETUP data_pin,
clock_pin [, bit_delay]
|
Defines the pins to
be used for the display TM1637.
‘data_pin’ defines
the pin allocated for the signal DIO of the display
‘clock_pin” defines
the pin allocated for the signal CLK of the display
‘Bit_delay’ permits
a delay when the display module is provided with capacitors on the
input pin. Its value is 5 by default and should be defined at 100
in this case.
|
TM1638.PRINT msg$ [,
brightness ]]
|
Print a message on
the display TM1638. The message can be up to 8 chars.
All ASCII
characters can be used but will be shown within the limitation of
the 7 segments of the display.
‘msg$’ defines the
message to be printed
‘brightness”
defines the luminosity of the display from 0 (blank) to 15
(max)
By default the
luminosity is at 15
|
TM1638.SETUP data_pin,
clock_pin, strobe_pin
|
Defines the pins to
be used for the display TM1638.
‘data_pin’ defines
the pin allocated for the signal DIO of the display
‘clock_pin” defines
the pin allocated for the signal CLK of the display
‘strobe_pin”
defines the pin allocated for the signal STB of the display
|
TM1638.LEDS val
|
Controls the 8 leds
installed on the module TM1638.
‘Val’ is an 8-bits
value where each bit is associated with a led.
Example :
TM1638.LEDS 1 ‘
illuminated the led 1
|
TFT.BMP filename$, [x, y [,
back_color] ]
|
Display a bitmap
file on the TFT display.
The file must be
present on the local disk before use.
The file format
must be ".bmp" with 24 or 32 bits.
The image can be of
any size but is limited to 320 x 240 (resolution of the
display).
The position (x, y)
is optional; if specified, the image will be drawn from that
point.
The back color is
useful for 32bit images when a transparent color is defined; in
this case the transparency will be replaced by the
‘back_color’.
Defining a
back_color at -1, the transparency will be maintained, useful to
put icons on the top of an image.
‘filename$’ is the
name of the bmp file
‘x’ is the
horizontal position of the image
‘y’ is the vertical
position of the image
‘back_color’
(optional) is the background color (-1 by default)
Example
TFT.BMP
"/icon1.bmp", 50, 50
|
TFT.BRIGHTNESS val
|
Set the TFT
backlight intensity.
‘val’ can be from 0
(dark) to 255 (max)
Example:
TFT.BRIGHTNESS 128
‘ set the luminosity at 50%
|
TFT.CIRCLE x, y,
radius,color [, fill]
|
Trace a circle at
the point (x,y) with the specified radius.
Specifying 1 for
the argument fill, the circle will be filled.
Example
A filled circle at
20,20 radius 18, with a reddish color
TFT.CIRCLE
20,20,18,TFT.RGB(255,10,10),1
|
TFT.FILL color
|
Fill the whole
screen with a given color.
‘color’ is the
color; as it must be a 16 bit color (RGB565), its value can be from
0 to 65535.
The color can be
obtained specifying the R,G,B components with the function
TFT.RGB.
Example:
TFT.FILL 0 ‘
fill the screen with black (equivalent of CLS)
|
TFT.IMAGE filename$, [x, y
[, back_color] ]
|
Display a BMP or
JPG file on the TFT display.
The file must be
present on the local disk before use.
The file format
must be ".bmp" with 24 or 32 bits or “.jpg”
The image can be of
any size but is limited to 320 x 240 (resolution of the
display).
The position (x, y)
is optional; if specified the image will be drawn from that
point.
The back color is
useful for 32bit images when a transparent color is defined; in
this case the transparency will be replaced by the
‘back_color’.
Defining a
back_color at -1, the transparency will be maintained, useful to
put icons on the top of an image.
‘filename$’ is the
name of the image file
‘x’ is the
horizontal position of the image
‘y’ is the vertical
position of the image
‘back_color’
(optional) is the background color (-1 by default)
Example
TFT.IMAGE
"/icon1.bmp", 50, 50
TFT.IMAGE
“/roses.jpg”, 64, 64
|
TFT.INIT orientation
|
Initialize a TFT
ILI9431 display connected to the module.
‘orientation’ is a
number between 0 and 3 specifying the orientation:
0
|
Portrait
|
1
|
Landscape
|
2
|
Portrait
reversed
|
3
|
Landscape
reversed
|
Example :
TFT.INIT
1 ‘
Landscape
Check the chapter
about the TFT display for more details
|
TFT.JPG filename$, [x, y [,
scale] ]
|
Display a JPG file
on the TFT display.
The file must be
present on the local disk before use.
The file format
must be “.jpg”
The image can be of
any size but is limited to 320 x 240 (resolution of the
display).
The position (x, y)
is optional; if specified the image will be drawn from that
point.
‘filename$’ is the
name of the jpg file
‘x’ is the
horizontal position of the image
‘y’ is the vertical
position of the image
‘scale’(optional)
enable to scale the image (see next table)
scale
|
Scaling
effect
|
0
|
1:1
|
1
|
1:2
|
2
|
1:4
|
3
|
1:8
|
Example
TFT.JPG
“/roses.jpg”, 64, 64
|
TFT.LINE x1, y1, x2, y2,
col
|
Trace a line on the
TFT between the point (x1,y1) and the point (x2,y2) with the
color ‘col’
Example:
TFT.LINE 50, 50,
150, 150, TFT.RGB(255, 0, 0)
|
TFT.PRINT expression [[,;
]expression] ...
|
Draw a text on the
TFT display.
Multiple
expressions can be used and must be separated by either a:
-
Comma (,) which will output the tab character
-
Semicolon(;) which will not output anything (it is just used to
separate expressions).
A semicolon (;) at
the end of the expression list will suppress the automatic output
of a carriage return/newline at the end of a print statement.
Integers (whole
numbers) are printed without a decimal point while fractions are
printed with the decimal point and the significant decimal digits.
Large floating point numbers are printed in scientific number
format.
|
TFT.RECT x, y, width,
height, color [ [,fill] ,[round_radius] ]
|
Trace a rectangle
at the point (x,y) with the specified width, height and color.
Specifying 1 for
the argument fill, the rectangle will be filled.
Specifying a value
for ‘round_radius’, the rectangle will be rounded at the corners
with the value specified.
Example:
TFT.RECT 100, 50,
50, 50, TFT.RGB(255, 128, 0)
|
TFT.TEXT.COLOR color
[,backcolor]
|
Set the color and
the background of the text that will be printed with the command
TFT.PRINT
‘color’ define the
color of the text
‘backcolor’
(optional) defines the background of the text
If ‘backcolor’ is
not defined, the background will be black
|
TFT.TEXT.POS x, y
|
Position the text
cursor at the point (x, y).
The text will be
printed at that position with the command TFT.PRINT
|
TFT.TEXT.SIZE size
|
Set the size of the
text that will be printed with the command TFT.PRINT
The ‘size’ can be
from 1 to 8.
|
TIMER0 interval, label
|
Starts a timer
causing the program to periodically jump to the defined label.
The RETURN at the
end of the timer branch causes program control to return to where
it was before being interrupted by TIMER0.
‘Interval’ defines
the periodicity (milliseconds)
‘Label’ defines the
place where the timer will jump regularly.
Setting the
interval to 0 will disable it.
Note: The Timer0
has a higher priority than Timer1.
Example
TIMER0 1000,
cycle -> jumps to ‘cycle’ at each second
|
TIMER1 interval, label
|
Starts a timer
causing the program to periodically jump to the defined label.
The RETURN at the
end of the timer branch causes program control to return to where
it was before being interrupted by TIMER1.
‘Interval’ defines
the periodicity (milliseconds)
‘Label’ defines the
place where the timer will jump regularly.
Setting the
interval to 0 will disable it.
Example
TIMER1 1000,
cycle -> jumps to ‘cycle’ at each second
|
TOUCH.CALIB
|
Start the calibration of the touch screen. The
user will be asked to click on 4 crosses.
The calibration values will be stored inside
the module and stay in effect even after restarts.
|
UDP.BEGIN port
|
Start the UDP
Server.
‘port’ is the udp
port to be open (numerical).
All the messages
received on this port can be read with the function UDP.READ$
|
UDP.REPLY msg$ [,port]
|
Send an UDP message
back to the original transmitter.
Permits to answer
directly without specifying the IP and port.
It is optionally
possible to specify the remote port with the argument ’port’
|
UDP.STOP
|
Stop the UDP
server.
|
UDP.WRITE ip, port,
msg$
|
Send a UDP message
to the client defined with the IP address ‘ip’ and the port ‘port".
The message ‘msg$" must be a String.
UDP.Begin must be
used to initialise the UDP port before using UDP.write
|
URLMSGRETURN msg$
[,content_type$]
|
Returns a message
to the client that sent the URL AJAX GET request.
Is an async
request, so it can work in parallel with other tasks.
When the program is
not running, any request will receive the message "STOPPED".
The message can be
optionally composed of an hex string in the format of 2 hex char
per byte (ex: “3a552b23”) associated with a content type string
(ex: "image/gif").
For more detail
refers to the dedicated paragraph..
Useful in
combination with ONURLMESSAGE and URLMSGGET$
More information here
|
WAIT
|
Stops the execution
of the program while waiting for events.
Useful when using
"event driven" code (timers, interrupts, triggered events, ..)
|
WGETASYNC http_server$, port
[,header]
|
Start a GET server
request in async mode
‘http_server$’ is
the server url request
‘port’ is the port
number; if port=443, the connection will be done using SSL
(secure).
‘header’, if =1,
will include the header in the answer (useful for debug)
The program will
continue and the answer will be received in background.
As soon as the
answer is completed, the program will jump to the label defined
with the command ONWGETASYNC.
To get the result,
use the function WGETRESULT$.
Example :
ONWGETASYNC
answer_done
WGETASYNC("www.fakeresponse.com/api/?sleep=5", 80)
For i = 0 to
10000
‘ a kind of sleep
just to demonstrate that the code continues to run
Print i
Next i
Wait
answer_done:
Print
WGETRESULT$
Return
|
WIFI.AWAKE
|
Wake Up the WiFi
from the sleep mode triggered with the command WIFI.SLEEP
|
WIFI.CONNECT SSID,
password
|
Connect the module
to a WiFi network using the given SSID and password.
It is possible to
gather the connection status using the function WIFI.STATUS
|
WIFI.POWER pow
|
Set the output
power of WiFi
‘pow’ defines the
value in dBm
The range is
between 0 and 20.5
|
WIFI.SCAN
|
Starts to scan WiFi
networks available.
Must be used in
association with WIFI.NETWORKS
|
WIFI.SLEEP
|
Put the WiFi in
sleep mode.
The module will be
placed in “modem-sleep” mode.
This mode turns the
WiFi OFF but the module will continue to work.
In this mode the
power requirement is lowered to around 25mA.
Important: this
will work only if the module is in AP mode with static IP address
or in STA mode
|
WLOG [text$ | num]
|
Send text content
to the debug page.
Check the chapter
about html objects for more details
See also the
commands CLS, HTML, JSCRIPT, JSEXTERNAL, CSS and JSCALL
|
WORD.DELPARAM setting$,
parameter$, [,separator$]
|
Delete a parameter
from a string containing a series of parameters. If the parameter
exists, it will be removed, otherwise the string will not be
modified.
The parameters are
stored as below :
param1=value1
param2=value2
…….
paramx=valuex
‘setting$’ defines
the string containing the set of parameters
‘parameter$’
defines the parameters to be deleted.
‘separator$’ is an
optional parameter specifying a different separator character.
Example, assuming
that a$ is empty :
WORD.SETPARAM a$,
"light", "on"
WORD.SETPARAM a$,
"temp", "10"
WORD.SETPARAM a$,
"pump", "off"
A$ will contain
:
light=on
temp=10
pump=off
Using the following
line:
WORD.DELPARAM a$,
"temp"
A$ will contain
:
light=on
pump=off
By default the
separator is the character ‘=’.
Useful in
combination with WORD.GETPARAM$, WORD.SETPARAM and FILE.SAVE
|
WORD.SETPARAM setting$, parameter$, value$
[,separator$]
|
Put a parameter
into a string containing a series of parameters. If the same
parameter already exists, its value will be replaced with the new
one.
The parameters are
stored as below :
param1=value1
param2=value2
…….
paramx=valuex
‘setting$’ defines
the string containing the set of parameters
‘parameter$’
defines the parameters to be set.
‘value$’ defines
the value to be set.
‘separator$’ is an
optional parameter specifying a different separator character.
Example, assuming
that a$ is empty :
WORD.SETPARAM a$,
"light", "on"
WORD.SETPARAM a$,
"temp", "10"
WORD.SETPARAM a$,
"pump", "off"
A$ will contain
:
light=on
temp=10
pump=off
Using the following
line:
WORD.SETPARAM a$, "temp",
"20"
A$ will contain
:
light=on
temp=20
pump=off
By default the
separator is the character ‘=’.
Useful in
combination with WORD.GETPARAM$, WORD.DELPARAM and FILE.SAVE
|
BASIC KEYWORDS
CASE
|
Keyword :
Used in combination with the SELECT command
|
DIM array(size) [, …]
|
Permits to define
arrays.
The arrays can be
floating point or string.
The number of
dimensions (subscripts) is limited to 5.
Look at the chapter
"Arrays" for more details
|
DO
|
The DO loop
|
ELSE
|
Keyword : Used in
combination with the IF and SELECT commands
|
END [IF | SELECT | SUB]
|
Used in several
forms:
END alone terminate
the execution of the program
END IF to
terminate the IF
END SELECT : to
terminate a SELECT CASE
END SUB : to
terminate a SUB
|
ENDIF
|
Used in combination
with the IF command; can be also written as END IF
|
EXIT {DO | FOR | SUB}
|
Permit to exit from
a DO LOOP (EXIT DO), a FOR LOOP (EXIT FOR) or a SUB (EXIT SUB)
|
FOR
|
FOR command;
Used in combination with the NEXT command
|
GOSUB [label | lab$]
|
Jumps to a named
label; the flow control will come back as soon as the command
RETURN is reached.
The label must
begin with a letter, not a number.
The contents of a
string variable can be used instead of a static label name,
allowing choice of destinations for creating dynamic function
calls
|
GOTO [label | lab$]
|
Jumps to a named
label; the label must begin with a letter, not a number.
The contents of a
string variable can be used instead of a static label name,
allowing choice of destinations for creating dynamic jumps
|
IF
|
IF command; used in
combination with THEN, ELSE ENDIF and END IF
|
LET var = expression
|
Optional for
variable assignment
|
LOOP
|
Keyword : Used in
combination with the DO command
|
NEXT
|
Keyword : Used in
combination with the FOR command
|
OFF
|
Keyword : used in
combination with the INTERRUPT command
|
OUTPUT
|
Keyword : Used in
combination with the PIN.MODE command
|
PULLUP
|
Keyword : Used in
combination with the PIN.MODE command
|
PULLDOWN
|
Keyword : Used in
combination with the PIN.MODE command
|
REM
|
Define a
comment(remark); the symbol ‘ can be used instead
|
RETURN
|
Returns to the
caller after a Gosub or an Event happened
|
SELECT
|
The SELECT CASE
|
SPECIAL
|
Keyword : Used in
combination with the PIN.MODE command
|
STEP
|
Keyword : Used in
combination with the FOR command
|
SUB
|
Defines "user
named" subroutines.
Refer to the
paragraph "SUB" and "Scope of the variables" for more details.
|
THEN
|
Keyword : Used in
combination with the IF command; this keyword is optional in the IF
command
|
TO
|
Keyword : Used in
combination with the FOR command
|
UNTIL
|
Keyword :
Used in combination with the DO command
|
WEND
|
Keyword : Used in
combination with the WHILE command
|
WHILE
|
The WHILE LOOP;
also used as condition for the DO LOOP
|
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