Compatible RC Transmitter and Receiver Systems
PIXHAWK supports PPM and SBUS, not PWM.
So if your remote doesn't support PPM and SBUS, you have to add a PPM encoder to use it.
1.PWM connection method
Because pixhawk does not support PWM, only PPM encoders should be added.
The PPM encoder is connected to PIXHAWK RC_IN interface.
2.PPM connection method
Set the remote control to PPM mode and connect to PIXHAWK RC_IN interface
3.SBUS connection method
Set the remote control to SBUS mode, and then connect to the flight control RC_IN interface.
Note: many people think that the SBUS receiver is plugged into the flight control SBUS interface, inserted into the SBUS found that the receiver's lights are not on.
This is the wrong connection.Because the flight control SBUS interface is the output, not the input.Only RC_IN is the insertion point of the receiver.A lot of people are wrong about that.
Therefore, whether it is PPM or SBUS mode, the receiver is plugged into the flight control RC_IN interface.