Terrible trouble with an Waveshare epaper 2.9 display

Using Arduino Displays
15

@angelomaggiora,

I have added support for GDEM029T94 2.9" b/w, actual Waveshare 2.9" b/w to GxEPD.

See also Waveshare e-paper displays with SPI - Using Arduino / Displays - Arduino Forum

Jean-Marc