GxEPD2 Loss of contrast. Waveshare e-Paper Driver HAT rev2.3

Other Hardware Displays
3

Thanks for the reply.

Not sure if this has anything to do with GxEPD2, other than it is the display library being used. I was mostly just wondering if you have seen this issue before. I'm not entirely sure why this may be happening, and was hoping that you might have any insights.

Here is the information you requested.

ESP-WROOM-32E - specifically this board https://www.dfrobot.com/product-2195.html

  GxEPD2_BW<GxEPD2_750_T7,
            GxEPD2_750_T7::HEIGHT> display(
    GxEPD2_750_T7(PIN_EPD_CS,
                  PIN_EPD_DC,
                  PIN_EPD_RST,
                  PIN_EPD_BUSY));

Here is a wiring diagram. The HAT is wired to 3.3v.

image
image1670×1080 142 KB

Working on getting a picture of the inking.

That's a good question, I will forward it to Waveshare. So this presents like a low voltage issue?

-Luke

Edit: added constructor