ESP.deepSleep(PERIOD_SEC * 1000000, WAKE_RF_DEFAULT);
Most likely you have a Waveshare 1.54" board with level converters. This can interfere with ESP8266 boot modes if D8 (SS) is used for CS, as D8 is a "strapping pin" and its pull down resistor is too week for use with the level converter. You can try with a 3.3k pull down resistor, or use a different pin for CS.
GxIO_Class io(SPI, /*CS=D6*/ D6, /*DC=D3*/ 0, /*RST=D4*/ 2);
What other pin can I use for CS? Anything?
Hi ZinggJM! Add please GDEM029E97 display to your library. I checked for capability your modules and find, that GxEPD2_213_B72 work fine, but with wrong resolution. Here datasheet for my display http://www.e-paper-display.cn/downloadRepository/0c3dd104-78d7-4f2c-a6df-00b3f6f2ef6d.pdfThank you.
Jean-MarcThe actual Wavehare E-paper HAT has a severe design error: a reset on the wired reset line switches OFF the supply to the e-paper. Release of reset to the e-paper panel occurs at the same time as powering up the e-paper panel. Independent reset to the e-paper controller is impossible.
Hi everyone, I am new to Arduino and limited knowledge on programming. I having this problem using flexible 2.9inch epaper, it is not using the full texture space and its flipped horizontally, I am not sure where went wrong. I downloaded the codes from GitHub and used Image2Lcd to generate the codes. I downsized the size of image and positioned it to bottom left corner and mirrored it, so its show correctly on the epaper.Anyone can teach me the correct way to do it?