Pardon my ignorance but how do you configure the auxiliary outputs,(1-6), for RC control? I’ve used up the standard outputs and need to use the Aux. outputs for Pan and Tilt.
BRD_PWM_COUNT is the parameter you are after.
Set to 1 for using Aux1 as PWM, set to 2 to use Aux1 and Aux2 and so on…
https://ardupilot.org/copter/docs/parameters.html#brd-pwm-count-auxiliary-pin-config
Also use SERVO 9 options to set RC passthrough, and SERVO 10 etc