"Hi Randy,Thanks for the reply, i have some image but after a few frame, it starts to hang. Currently i have borrow a APM2 and tested with no problem.
I also have additional question, after testing with python (tuning the focusing), i use mission…"

"Hi Tobin, have you solve your problem?? i am also facing this problem for 2 months, from hardware till software, i have checked everything. but it will crash at some point be is Mission Planner or Python. The error in Python is

 sent 'I' to COM4…"