Probably being a little stupid but I can connect to the PIxhawk using mission planner and my TX controls calibrate without a problem so I assume the sbus connection from my RX to the Pixhawk is working fine (power going the other way is clearly fine).
However I cannot get any output from the main Pixhawk servo outputs. The pixhawk has a nice large green light and mission planner is showing a GPS fix which looks fine. I believe everything is armed and good to go but no servo movement! When I plug the servo into my receiver everything works as expected.
What have I missed?