After upload fw onto pixhawk with QGC. So QGC difficult with me, and I trying flashing fw from Mission Planner, but some thing error in Usb ( the pin of USP maybe not tight, when I keep my hand it can connect. But when my hand strong, Usb take out. I trying to welding but have error too.)
Some body tell me press reset button ( near usb) to reset fw. so now my board error, Main led red flashing
Coud you please help me, How upload fw without usb ( ex telem1, telem2, serial 4/5).
many thanks for support
(Sorry my enghish)