"Thankyou for your post.
I have fixed that problem.After I flashed my firmware , there is no response when I turning the pixhawk unless I choosed the frame type of the aerial vehicle."
my pixhawk can not connect to the QGC(v2.2.0) or MP with px4 firmware.And the main LED is always breathing blue, I'm not sure what does that mean.QGC can find the board and the bootload except the firmware .I reload the firmware as…