I've been looking for a more convenient way to configure some ESP32-based input devices (similar to macropads). I was interested in QMK, but it doens't support ESP32. So far I've been using MicroPython / CircuitPython, which I generally like, but on multiple occasions I've thought "I wish I could just put this in a config file."
The matrix keypad and key collector components look similar to what I was looking for. Can the key collector be used with other multiplexing methods like shift registers?