E-paper Module Black, White and Red 2.9 inch

From the shop's description

Module Features 1. No backlight, keeps displaying last content for a long time even when power down, and the time can be up to half a year 2. Ultra low power consumption, basically power is only required for refreshing 3. SPI control interface, which can be connected to Raspberry/Arduino/rduino/STM32 and other main control boards 4. Provide complete supporting information (Arduino sample program, showing global display and partial display) Module parameters Size: 2.9 inch Dimensions (module): 90.5mmx45.7mm Display size (viewable area): 66.89mmx29.05mm Working voltage: 2.8V-5.3V Communication interface: 3-wire SPI/4-wire SPI (optional) Dot pitch: 0.226×0.227mm Resolution: 296×128 Display color: black and white and red three colors Gray level: 2 Partial refresh: 0.3s (only black and white dual colors support partial refresh) Global refresh: 15s (black and white red three colors) For a computer, its data storage method is high-order first, low-order second, and a byte has only 8 bits, so there will be a little change: so that only 2 bytes are needed to represent 16 pixels.