eInk Arduino ESP32 Haiku Reader
ESP32 to 2.9 Waveshare eInk connections are: Busy D4, RST D21, DC D22, CS D5, CLK D18, DIN D23.
Then 2 push buttons connected to ESP32 GND and ESP32 D12 and D13.
Finally, a 3.7v battery connected to ESP32 VIN/GND and eInk display VIN/GND
https://www.youtube.com/watch?v=rBlDi_jEWQs
https://www.thingiverse.com/ronibandini/designs
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