We can not get our Erle-Copter to fly autonomous.
We are using APM Planner 2.0 to create a flight plan, a very simple one with two lines; "lift off" to rel.altitude 5 m and then "land". After arming the Copter we are able to write the flight plan to the Erle-Copter. In APM planner we can read that the flight plan is received by the Copter. When we press the start button in APM Planner the Copter spins up - gives the message: "Faiure: unsupported CMD 252", and disarmes and shuts down.
What are we doing wrong?