I don’t know about MAVROS.
I found this: Sending command to MAVLINK MAV_CMD_DO_SET_SERVO via MAVROS
but not much of DO_SET_SERVO in the MAVROS source:
I don’t know about MAVROS.
I found this: Sending command to MAVLINK MAV_CMD_DO_SET_SERVO via MAVROS
but not much of DO_SET_SERVO in the MAVROS source: