I have been trying to create a new MAVLink as described in Adding a new MAVLink Message which I did and managed to recompile successfully the ArduCopter using the command ./waf copter. (I assume this will generate the firmware that I will use later on mission planner).
As I understand from various posts I now need to recompile Mission Planner by adding the same message to ExtLibs\Mavlink\message_definitions\ardupilotmega.xml and update mavlink via running regenerate.bat.
My question is how to use the copter I compiled before?
Many thanks,
Greg