Hi, I have an Adafruit Feather 32u4 and a Pro Mini. The Feather and the Mini is connected via two pins - Feather pin 10 to Mini pin 4, and Feather pin 11 to Mini pin 5. Their grounds are connected. This setup is for a very simple communication and it works fine. The Feather communicates to the Min…

Pro Mini magically turns on

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