Compatibility Problems with Seeed ePaper Driver Boards

[itopaloglu83]

Hello,

This is a rather complicated issue to explain, so please bear with me. I have two esp32 devices and two driver boards, and a 2.13" screen.

2 x Seeed Studio XIAO ESP32-S3 Plus
1 x ePaper Driver Board for Seeed Studio XIAO
1 x ePaper Breakout Board for Seeed Studio XIAO

I installed the firmware and the configurations correctly, and everything works fine with the breakout board. However, the driver board, the one with battery connections, fails with the following error.

[01:19:48] BLE< 00 74
[01:19:48] Error sending to display: Display refresh timed out
[01:19:48] Display refresh timed out
[01:19:48] BLE< 00 72
[01:19:48] BLE< 00 71
[01:19:48] CMD> 0072 Payload:  (0B)

Is the driver board supported with this firmware? Or am I missing something else?

I'm using the BLE Tester screen, the device connects successfully and I'm able to read MSD data and also reboot it. However, when I send an image it simply fails after transferring the image data. The strange thing is that image is shown on the screen. When I use the breakout board, there's a white space around the image on the screen, however with the driver board it's surrounded by a black box.

Thank you.

[jonasniesner]

Ah, both boards appear to have different pinouts. I can add it to the easy config if you want. If you press the full configuration button(with the working config selected) you might be able to test it yourself by changing the pins with the schematic

[itopaloglu83]

Thank you @jonasniesner

I can try updating the configurations, but as an end-user I’m not well versed with it.

Would it be possible to add these boards? Or could you provide some guidance on what to change and I can create new configurations as JSON and share them here.

[jonasniesner]

You can try the following config:

If your screen is black and white https://opendisplay.org/firmware/toolbox/index.html?config=nQABAAECAAEA_wAAAAAAAAAAAAAAAAAAAAAAAQIBAAIBAAAAAAAAAAAAAAAAAAAAAAAAAgQCAAAA0AcIAP__AAAAAAAAAAAAAAAAAAAAAAAAAAADIAABAwCAAPoAFwA9AAAAAAEDBAIJAQAKBwAAAAAAAAAmAAAAAAAAAAAAAAAAAAAEIQAAFRUVAAAAAAAAAAAAAAAAAAAAAABroA

If your screen has Black White Red and yellow: https://opendisplay.org/firmware/toolbox/index.html?config=nQABAAECAAEA_wAAAAAAAAAAAAAAAAAAAAAAAQIBAAIBAAAAAAAAAAAAAAAAAAAAAAAAAgQCAAAA0AcIAP__AAAAAAAAAAAAAAAAAAAAAAAAAAADIAABNACAAPoAFwA9AAAAAAEDBAIJAQMKBwAAAAAAAAAmAAAAAAAAAAAAAAAAAAAEIQAAFRUVAAAAAAAAAAAAAAAAAAAAAAA3Yg

[itopaloglu83]

Thank you!

I also compared the changes to the default esp32_s3 and it looks like the only thing I need to change is display busy pin from “6” to “3”.

[jonasniesner]

So did my config work for you(I am asking so I can add it to the simple config)?

[itopaloglu83]

Yes, it worked like a charm.

I used the default esp32_s3 config and updated the busy pin to 3 and it worked with a 2.13" B/W screen.

---

However, I'm experiencing some problems with the 7.5" screen. The image is a little washed-out and there are vertical lines. Here's the image I'm trying to show, and how it looks like after dithering, and the image below is how it actually looks.

Here's the test image:

After the Atkinson dithering:

Here's the image shown, there are vertical lines in the far bridge foot:

[itopaloglu83]

For reference here's the same image rendered by EE04 board.