How do you send a command to takeoff directly from MAVLink (from a companion computer)? Right now via MAVLink I:
-check GPS and EKF to make sure I can arm the vehicle
-change mode to Guided
- send the arm command (and verify the vehicle does in fact arm)
- send this takeoff command:
mavlink_msg_command_long_pack(250, 1, &message, 1, 1, MAV_CMD_NAV_TAKEOFF, 0, 0, 0, 0, 0, 0, 0, alt)
(and then send it to the autopilot)
but the command is not accepted by the autopilot. Do I need to do anything else such as query or set the home position?