The recent expansion has caused great interest in ink screens, so I have added an electronic ink screen module, a 2.9-inch 4-wire SPI of a certain snow brand, with a resolution of 296x128. As we all know, although the ink screen has the disadvantage of huge refresh speed, it does not need a backlight and is not afraid of bright environments. Even better, it has a power-off retention function, which is very suitable for offline scenes.
I have a ash-eating raspberry pie Zero WH (WH is W, but the pin header is welded from the factory), so use it as a personal message board. When power is on, you can push text remotely, or let the Raspberry Pi fetch text from the server through the program. It's okay to power off the Raspberry Pi after finishing the text.
The wiring is very simple, just be careful. It happened to be very compact, using the physically numbered pins 17-24, praise.
The sample program is located at http://www.waveshare.net/w/upload/e/e0/2.9inch_e-paper_code.7z, unzip it after downloading, you can find the code related to the Raspberry Pi in the directory, the picture is for reference rewritten from main.py.
More information on this module can be found on the manufacturer's official website. In order to avoid the suspicion of advertising, I will not put the specific URL. If you are interested, you can find it in many ways.
