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The raw panel require a driver board, If you are the first time use this e-Paper, we recommend you to buy the HAT version or buy more one driver hat for easy use, otherwise, you need to make the driver board yourself. And this instruction is based on the version with PCB or driver board.
Developer's Resource: Link to Resource Page
To fastly get started with this raw display, please consider the following driver boards:
e-Paper Driver HAT (Universal)
e-Paper Shield (Arduino/NUCLEO)
e-Paper ESP8266 Driver Board (WiFi)
e-Paper ESP32 Driver Board (WiFi / Bluetooth)
This product is an E-paper device adopting the image display technology of Microencapsulated Electrophoretic Display, MED. The initial approach is to create tiny spheres, in which the charged color pigments are suspending in the transparent oil and would move depending on the electronic charge. The E-paper screen display patterns by reflecting the ambient light, so it has no background light requirement. (Note that the e-Paper cannot support updating directly under sunlight)
Note: Different from the traditional SPI protocol, the data line from the slave to the master is hidden since the device only has display requirement.
SPI communication has data transfer timing, which is combined by CPHA and CPOL.
As you can see from the figure above, data transmission starts at the first falling edge of SCLK, and 8 bits of data are transferred in one clock cycle. In here, SPI0 is in used, and data is transferred by bits, MSB first.