Serial Port Configuration
In the drone, set the following for Serial 3:

You can verify the connection by looking into the Mavlink inspector in mission planner. It should recognized MAV_COMP_ID_PARACHUTE in the vehicle 1.

In the drone, set the following for Serial 3:

You can verify the connection by looking into the Mavlink inspector in mission planner. It should recognized MAV_COMP_ID_PARACHUTE in the vehicle 1.
