ArduCopter 3.4 crash when switching to LAND (Precision landing with companion computer enabled but no code running at the time)

Hi guys.

So I'm trying to make a drone use the precision landing feature to land on a target by using a camera and sending vehicle.message_factory.landing_target_encode() MAVLINK messages using the dronekit API based on where the target is in the came

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Raspberry Pi 2 offboard control of Pixhawk, fly mission and then switch to land on target using Opencv

Hi all. 

I'm doing a little project where I want to use a Raspberry Pi 2 to run a python script that sends MAVLINK commands to the Pixhawk where it takes off, flies between a couple of waypoints and at the last waypoint it switches to using a down-fac

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