Conservation Drones
conservationdrones.org
conservationdrones.org
The most difficult thing was waiting for the board to get a GPS lock (sometimes it felt like an eternity but it's quick enough now), making a hole so I can plug in the USB without having to remove the board each time and trying to work on a laptop screen in full daylight...
The best bit so far (for me) is not so much the UAV part but the fact that in "stabilize" mode, you can put the aircraft in any situation (diving, stalling etc) and just let go of the sticks and it'll level out in seconds and in "return to launch" mode it will just lazily circle above your head at a predetermined altitude.
I'm looking forward to trying "geofencing" soon - which is creating an invisible boundary and minimum altitude. Go outside (or under) that and the autopilot takes over and brings the plane back to you.