"Hi.
I am trying to do same thing, and i have a question.
What 'packet frame type' did you use for the firmware side packet header?"

"hmm... I tried, but I failed my motor to spin.
I cannot understand that other ppl easily make the px4 work with QGC, but why I can't??

Thanks any way Wang. I guess the cause of my problem is different thing."

"Thanks your for your answer.
May I ask u one more question?
Are you sure with that I should create even the rc.txt file??

What I read on the px4 document said that the rc.txt file make the system unable to start.
Also, I created the config.txt file…"

"Hi,

I got same problem with you, but I could not solve my problem with your answer...
Therefore, I want ask you some questions.
1. What airframe model you chose for your quad?
2. I checked my SD card and I do not even have etc folder. Should I…"