I spent a few hours today trying to get this working on a 4GB Pi4. Could not get MP to start using the mono installation as per the how-to doc, same as the one on the mono page. Ended up reflashing raspiOS and just installing mono using
sudo apt install mono-complete which then let MP start up. Can’t seem to connect to a flight controller though, so not sure what’s going on.
I’m also trying to build a pi-based GCS but can’t see this working as a reliable solution right now. Thinking of switching to a latte panda or jetson instead.