what's the recommended way to shutdown Pi0 with PIXmini hat except for shutdown within ssh session that needs connection from PC?
I've found this manual: http://www.instructables.com/id/Raspberry-Pi-Zero-Switch-Off-by-Button/
but I'm not sure if it's suitable for this case, e.g. because it uses one GPIO pin, that can be possibly already used by hat.
I was also thinking about the possibility to shutdown Pi from RF Remote Control or by Mavlink by modification of Ardupilot code, but I'm not sure if something like that is already supported by PXFmini or it would require modifications on both OS and Ardupilot code side.