The Standard H-RTK F9P GPS can be used with CubePilot controller by connecting to GPS 2 port.
If using Ardupilot with The Cube, set Serial3_Protocol to -1 so that Ardupilot will read GPS2 port for GPS data if there is nothing connected on the GPS1 port.
Note: GPS2 port on both Pixhawk & Cube does not support Safety Switch function. You can use an external safety switch or disable the safety switch on ground control station application.
