Hi S.you asked me the meaning of the initialization sequence.This is how the adafruit code process it:https://git.kfayun.com/xpstem/circuitpython/-/blob/9.1.0/shared-module/dotclockframebuffer/__init__.c#L89 ioexpander_bus_send(bus, true, cmd,...

Hi Skele,I'm doing a very similar activity and I am currently in the middle of the debug.I have an MPU board that is not able to light up the display properly (even if the signals are correct), and for this reason, I've bought a complete adafruit kit...