1-2 of about 2 matches for site:www.waveshare.com drive-method
https://www.waveshare.com/wiki/9.7inch_e-Paper_HAT
SPI interface communication speed is not ideal), the advantage is that the drive method is relatively simple
https://www.waveshare.com/wiki/7.8inch_e-Paper_HAT
SPI interface communication speed is not ideal), the advantage is that the drive method is relatively simple