"There is definitely a serial port connection problem in the latest release.
I found I could install the firmware through APM Planner using USB but that was all.
I could not establish a connection to do any configuring nor get any data for the flight…"
"The strange traces in the log are beyond my humble understanding, but it does all seem to start with spikes on the Vcc. Then everything seems to go pear shaped.
Your Vcc starts dropping after the spikes at 2min down to about 3v. Not good.
"I would have to agree with the evaluation from the log in the other post.
You haven't given any details of your system setup though.
Do you have a gimbal? Servo or brushless?
How are you powering the APM, 3DR power module or something else?
"Yes, but your video will have to fed into your computer via an interface of some description.
There are many on the market and quite cheap.
Composite video to USB is just a cable that will connect your video Rx output (usually composite video) to a…"
"Brushless is the only way to go. I have built a few servo gimbals and they now lie in a heap in the corner gathering dust.
Once you have used a brushless gimbal the hassles of setting up servos and tuning their control is just not worth the effort.…"