it so bad that I broke serial2 when soldering, the I change to connect with serial4 or serial5, but I can not make a mavlink connection with baud,115200,500000,921600 after changing protocol to mavlink,is it possible to do that?
Did you also change the port baud date?
After terrible disaster, found that pic in wiki http://ardupilot.org/copter/docs/skyrocket.html is wrong,
by the way, feel really good with usb connection now