Can I connect my APM 2.5 to the computer using the USB-cable and at the same time connect my 3S battery to the 3DR Power Module (connected to the APM) without damaging anything?
I read somewhere (without much motivation) that it could damage the board. Suspect that it will be ok if the current from the power module isn't to high? I saw a table somewhere on the http://copter.ardupilot.com/wiki/ but can't find it now of course.
The reason for asking is that I want to run "compassmot". The instructions doesn't include any warning about this however.
If it can be a problem, is this valid alternatives?
1. Run compassmot using the wireless telemetry module?
2. Create a custom USB-cable without the power pins attached?