ESP32 LILYGO E-paper

Annex for ESP32
its1000
Posts: 65
Joined: Thu May 20, 2021 6:57 pm
Has thanked: 3 times
Been thanked: 1 time

Re: ESP32 LILYGO E-paper

Post by its1000 »

hello all.
quick question regarding the T5 screen to buy.

On aliexpress I find one with 9102 chipset and other with 2104 chipset.
what is the one I have to order?

thank you
Hendrix
Posts: 33
Joined: Sun Feb 14, 2021 11:03 am
Has thanked: 9 times
Been thanked: 6 times

Re: ESP32 LILYGO E-paper

Post by Hendrix »

I have the one with the 2104 converter.
It works flawlessly up to 1500000 baud.
its1000
Posts: 65
Joined: Thu May 20, 2021 6:57 pm
Has thanked: 3 times
Been thanked: 1 time

Re: ESP32 LILYGO E-paper

Post by its1000 »

great! I bought the same too. i will have it this week i hope
Hendrix
Posts: 33
Joined: Sun Feb 14, 2021 11:03 am
Has thanked: 9 times
Been thanked: 6 times

Re: ESP32 LILYGO E-paper

Post by Hendrix »

For I/O purposes it seems that only GPIO12, 13, 14 and 15 are available.
The optional touch panel will connect to I2C on GPIO13, 14 and 15, which leaves GPIO12 as the only free port for users.
(See schematics at Github: [External Link Removed for Guests])


Is it possible for Annex to use the I2C interface, even when the touch panel is already connected?
its1000
Posts: 65
Joined: Thu May 20, 2021 6:57 pm
Has thanked: 3 times
Been thanked: 1 time

Re: ESP32 LILYGO E-paper

Post by its1000 »

Hi guys..
I place the new subject I have with epaper here. because now flashing works perfect.
Ciccio again this is a great work you did for us integrating this great product.

I have 2 questions :

1- where can I find all the commands that are available for epaper? I searched a little bit without success in the esp32 help

2- i downloaded one of the first demo program with radio and check boxes, and tested it. works ok, but when the cls command run the screen is not fully white, there is some lines all over the screen.
someone had this issue?
i tried running only the cls commande without executing the rest of the program, same.

As usual, thank you for your help.
User avatar
Fernando Perez
Posts: 118
Joined: Mon Feb 15, 2021 10:09 pm
Location: Santander (Spain)
Has thanked: 62 times
Been thanked: 67 times

Re: ESP32 LILYGO E-paper

Post by Fernando Perez »

[Local Link Removed for Guests]
I suppose you know this documentation, but just in case you don't.
Surely there will already be some later help documentation.
Hendrix
Posts: 33
Joined: Sun Feb 14, 2021 11:03 am
Has thanked: 9 times
Been thanked: 6 times

Re: ESP32 LILYGO E-paper

Post by Hendrix »

Hi its1000,

I had the same problem, black lines on a white screen or vise versa. Over time it got worse, to the point that I thought it was broken.

I wrote a few lines that painted the entire screen black, then white again 10 times over.
Running this program a few times made all lines disappear leaving a nice white display again.

The problem came back once, after troublesome reconnecting. It looked like the ESP32 did send some random pulses.

Running the black/white program again reset the display 100% again.

regards, Henk
its1000
Posts: 65
Joined: Thu May 20, 2021 6:57 pm
Has thanked: 3 times
Been thanked: 1 time

Re: ESP32 LILYGO E-paper

Post by its1000 »

[Local Link Removed for Guests] wrote: [Local Link Removed for Guests]Sun Sep 12, 2021 6:21 pm Hi its1000,

I had the same problem, black lines on a white screen or vise versa. Over time it got worse, to the point that I thought it was broken.

I wrote a few lines that painted the entire screen black, then white again 10 times over.
Running this program a few times made all lines disappear leaving a nice white display again.

The problem came back once, after troublesome reconnecting. It looked like the ESP32 did send some random pulses.

Running the black/white program again reset the display 100% again.

regards, Henk
thank you
I left mine unplugged few hours, i tried again charging the GUI test program from Ciccio.. and miracle perfect white...
hope it won't come back...
Last edited by its1000 on Sun Sep 12, 2021 9:24 pm, edited 1 time in total.
its1000
Posts: 65
Joined: Thu May 20, 2021 6:57 pm
Has thanked: 3 times
Been thanked: 1 time

Re: ESP32 LILYGO E-paper

Post by its1000 »

[Local Link Removed for Guests] wrote: [Local Link Removed for Guests]Sun Sep 12, 2021 5:01 pm [Local Link Removed for Guests]
I suppose you know this documentation, but just in case you don't.
Surely there will already be some later help documentation.
Thank you very much. typing epaper in the search option was not finding me this part of the help.
now I have all what I need,

i tried just to print a circle with this simple program :

epaper.setup 0
epaper.cls
epaper.circle 200, 200, 200, 1


nothing happens. so i used the epaper.refresh command, but i don't know what mode stands for. I tried various values, and only 5 works. any other number no... why does this mode means? and what are the values?

also i tried the fill option for my circle, I have an error, "no such variable in line xx"
i typed
epaper.circle 200, 200, 20, 1, fill
epaper.refresh 5


sorry for all those questions, just the time to manage the basics of this great new product
Hendrix
Posts: 33
Joined: Sun Feb 14, 2021 11:03 am
Has thanked: 9 times
Been thanked: 6 times

Re: ESP32 LILYGO E-paper

Post by Hendrix »

This produces a filled circle on my display:

bluetooth.delete
epaper.setup 0
epaper.cls
epaper.circle 200, 200, 200, 1, 1
epaper.refresh 5
wait
Post Reply