This is cool. How did you connect the screen between the RPi and the OSPi boards. I want to add a small touchscreen to my install (currently waiting for the OSPi for delivery, and already planning mods), and most of the screens I’ve found need to plug in directly into the GPIO pins on the RPi. I figure that I can program the screen to indicate which zone is active and have some buttons for all stop, and manual on/off for each zone — so that kids can play in the sprinklers.
I want to find a way to run a cable from the GPIO (between the OSPi and RPi) to effective stack the modules and allow for screen mounting on the front of the case.