I just received my new -Fake- Pixhawk from Bangood today and this is what I did:
1: plugged in the buzzer, arming button and GPS/compass unit and plugged it in the USB port of my PC to check it out in MissionPlanner (1.3.3)
It seemed to work perfectly: GPS even acquired a lock indoors, external compass was pointing in the right direction, and the Artificial horizon showed it rock stable on the table. So all good here..
2: I did NOT check FW version (mistake) and proceeded to install Arduplane 3.5.2 (latest) as I want to use this in a fixed wing conventional plane.
3: Followed instructions and rebooted the Pixhawk.. It boot fine and talks with MissionPlanner but
-Artificial horizon is 'all over the place' showing constant movement in all directions
-GPS lock still good
-External compass no longer registering
-Unable to calibrate
-Displaying various error codes
4: Tried older Arduplane versions working down incrementally to 3.2.2; getting same results
5: Installed APM Copter 3.3.3 Quad and operation seems normal
6: Reinstalled Arduplane 3.5.2 but still defective as in step 3...
7: Removed GPS/Compass module and operation seems normal...
My thoughts: I think the hardware is fine but the firmware is not fully compatible with this new 2.4.8 version. This is my first time working with Pixhawk. Any help would be appreciated.
I'm finding very little information on the 2.4.8 Pixhawk except for Chinese sellers praising its features...
and This post on RCGroups which is of little help
Here's what I got: