Epaper display from Waveshare: wave4i7color 4.01 inches
Shades of gray:
88 x 55 mm
DescriptionThis class is only supported for now in our own Firmware Cale-idf. Controller: SPD1656 This resolution works in the Waveshare 4.01 inches 7 colors epaper
Dithering active with 3x3 mode. Bits per pixel: 24. Note that dithering downgrades the 24 bpp to 4 only but that is ok since with 4 bits per pixel you have 16 colors that is more than the epaper can support. It's not an optimal color picture but is fun and good enough to use as a photo-frame.
Please check our Arduino esp32 C++ Firmware for Epaper to use the image provided with CALE in your ESP32 SPI display. If you want to build a custom Firmware using Espressif IDF own framework we highly recommend to check our project Cale-Idf.