ESP32 LILYGO E-paper

Annex for ESP32
Hendrix
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ESP32 LILYGO E-paper

Post by Hendrix »

Lilygo offers a ESP32 with e-paper display on Aliexpress (search "LILYGO T5-4.7 inch E-paper ESP32 V3")
It is a EPS32 with a 960x540 e-paper and optional touch screen.

It is advertised to work with Arduino, any ideas how this would be compatible with Annex?
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Re: ESP32 LILYGO E-paper

Post by cicciocb »

Hi,
it seems a good module to experiment with and to be supported by Annex.

If enough interest and some donation, I could support it.
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Re: ESP32 LILYGO E-paper

Post by Hendrix »

Ok, thanks.
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Re: ESP32 LILYGO E-paper

Post by cicciocb »

Hi all,
I recently bought one of these modules and started experimenting with it.
image.png
It works a lot better than I expected, driver integration for this screen was pretty easy and I can confirm it works great with Annex.
The contrast of the image is simply incredible and the viewing angle is practically 180°.

Obviously the display is very slow but the quality of the displayed image is really impressive.
The very high resolution (960 x 540) makes it possible to display the text as if it had been printed on paper.

As the screen supports 16 gray levels, it is possible to display beautiful black and white images.

I did a little video with a simple demo done with Annex32.



The image below shows a small demo project where the module receives information from these 2 wireless sensors using BLE.
(One of the sensors has just taken out of my freezer, this explains the very low temperature: D)
IMG_5212.jpg
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Re: ESP32 LILYGO E-paper

Post by AndyGadget »

That looks great, Cicciocb. I have a perfect use for this.
If it's not too much trouble, would you mind measuring the battery current with the ESP32 in deep sleep mode for me as my application would be battery powered and charged only occasionally.
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Re: ESP32 LILYGO E-paper

Post by Electroguard »

The BLE sensors look small and neat, what's their range ?
Did you buy them as separates, or did they come with an internal receiver ?
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Re: ESP32 LILYGO E-paper

Post by cicciocb »

Robin,
the sensors are named Xiaomi Mijia and are combined Temp and Humidity sensors

[External Link Removed for Guests]

And they are very very cheap!

They are simply connected with BLE, without any intermediate receiver.
About the range, I don't know, but should be within the BLE range (below 10 meters or better if you are lucky).
I tried to use a module while it was inside my freezer and I was able to receive the signal.

The interesting point about these sensors is that they can be flashed with an alternative firmware.
This "alternative firmware" broadcast the module parameters (T°, HR and battery state) directly into the advertising message.
This means that is even not required to connect directly with them but simply listening for their advertising message.

Flashing these modules is super easy as all can be done with a web browser without even opening the device.

I bought 2 units that are working nice since more than 2 months

This is the github of the guy that developed the firmware
[External Link Removed for Guests]

And this is the web page for the firmware update
[External Link Removed for Guests]
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Re: ESP32 LILYGO E-paper

Post by Electroguard »

I'm glad I asked, and thanks for the unexpected info Francesco... I will be ordering a couple.
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Re: ESP32 LILYGO E-paper

Post by Hendrix »

It looks fantastic.

So now its time for me to join the e-paper era, thanks!
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Re: ESP32 LILYGO E-paper

Post by Hendrix »

When you take away power, will the display still stay on?
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