Bitmap ePaper Image from SD Card
The ePaper module is able to display bitmap images as well as text that’s formatted to a .bmp file. The first thing you want to have is a BMP file ready to load onto a micro SD card.
If you don’t have one you can convert a file to BMP format using MSPaint, or any online file converter (such as this one). Be sure to select the monochrome setting within the file converter and size your bitmap image dimensions a bit smaller than the display dimensions in units of pixels.