RPi 3 Pypilot control via GPIO push buttons

[drbarritt]

I don't have a TinyPilot. I have an RPi 3 running Open CPN (latest version) with the Pypilot plugin. This communicates via a serial link to an Arduino Nano that actually controls the steering motor (a hydraulic pump in my case via a Pololu H bridge controller). This is all working fine (on the bench anyway). So, yes I want to connect the buttons direct to the RPi 3. If this is not supported by the Pypilot plugin then I suppose I could add a keypad to the Arduino to take manual control of the motor, but this would not be as good a solution.
Cheers
David