Sample CircuitPython code to use a Neotrellis keypad for home control, plus a simple game
You can learn more about how to use the neotrellis at Adafruit: https://learn.adafruit.com/adafruit-neotrellis
I have the code running on a RaspberryPI Pico W. That board's 3.3v regulator is not heavy enought to power both the Pico W and a fully lit keypad, so I used a separate 3.3v regulator just for the keypad.
A video describing the project: https://youtu.be/UxYha0M_PLY