I found that after flashing to the suggested latest firmware (Feb 27, 2019) from PX4 stack, my RC is undetectable by QGC. I tried to reflash and change to MP no change.
Can someone help me how to downgrade back the older firmware bacause the file I downloaded from github is large and I don't know which .px4 file to run. And is downgrading fw would be a solution to my problem?
Thanks, any help is appreciated.