Cockpit button control?

[kirren]

If you just want buttons Philip, you don't need a separate microcontroller. You can just wire to the hat (https://pypilot.org/schematics/pypilot_tinypilot.pdf) and have the buttons short to ground. Have a look at the configuration options in the web interface to see if that'd suit you. According to Sean, holding +1/-1 for greater values is now supported (https://forum.openmarine.net/showthread....5#pid24145), so your idea of three buttons for a screen-less set of simple buttons could work fine and would only require 4 wires.