"Is your first power module from HK too?
I had similar problem with incorrent measurents too. My PM showed more than 1V difference. The problem was caused by bad wires(!!!) from PM to PX. I measured wire resistance and it was around 1 Ohm."
"Hi, Nick. I tried to use the board with APM firmware (APM:Plane 3.3, also tried older versions), but i receive "Calibration FAILED" message every time i try to calibrate an accelerometer.
It works well in PX4."
"AFAIK the autopilot mainly relies on external compass. Most people (and me) fly with such setup but it doesn't cause crashes. The autopilot considers compass errors level (and maybe compass location (internal or external)) to avoid usage of wrong…"
"Hi. I finished to build my copter yesterday. And i broked all propellers :)
I have the flight base now and can start integrate RasPI into my copter.
I will use WiFi for the communication and webcam for FPV.
Also i will use existing MultiWii for…"