
Use SERVO_BLH_MASK to enable BLHeli pass-through and telemetry support on non-multirotor motors and / or exactly specify which servo outputs you want to enable BLHeli pass-through and telemetry on.if using BLHeli ESCs on non-multirotor motors with the respective SERVOn_FUNCTION set to 70 (=throttle), 73 (=throttle left) or 74 (=throttle right), you will need to further specify the used outputs as follows: for most multirotor and quadplane users this will do the right thing. Set SERVO_BLH_AUTO to 1 to enable automatic mapping of multirotor motors for BLHeli pass-through and telemetry support.

To enable BLHeli pass-through you need to set the following parameters and reboot your autopilot:
