I'm going to be using the Waveshare 2.13 white/red/black display Hat with my ESP32. This requires 3.3v SPI, which I understand that the ESP32 has/does. If/when I use it with my Arduino UNO R3 I'll have to use level shifters, right? (It is made to be a Raspberry Pi hat so those GPIO pins are already 3.3v.)
I tried compiling the Demo Code, but there were various compilation problems.
I also looked at the example for Graphics Test that I compiled for the built-in display on the ESP32. For epaper it has U8G2_IL3820_296X128_F_4W_SW_SPI u8g2 for the "WaveShare 2.9 inch eInk/ePaper Display". This is apparently 296x128, but the one I have is 212x104. Does the u8g2 and u8x8 libraries have a display driver for this one I have?