By sending SET_POSITION_TARGET_LOCAL_NED messages with bitmask with value 0xFFFF, it allows me to stay in offboard mode.
However, I’m now facing a new trouble as it seems the MAV_CMD_TAKEOFF_LOCAL is not supported (QGC report Takeoff local command not supported and the led of pixhawk blink red as it does when it reject an improper flight mode)
I’ve tried with PX4 1.4.1 and 1.4.4. Perhaps there is another Takeoff/Land command I might use and that is working with offboard flight mode ?
Thank you for your help and advices