I’m looking for some details on the DIY kits. I just finished my own gimbal / electronics that I use

I’m looking for some details on the DIY kits. I just finished my own gimbal / electronics that I use with XPlane, Condor 2, and MSFS. It runs mainly on I2C on a RPi Pico. In the DIY motor kit, how do the buttons / normal electronics integrate in with the system?
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