"PX4 software stack does not work on it, but APM does.
download & build the firmware from "https://github.com/ArduPilot/ardupilot @ branch Copter-3.3-pixracer", it works with no problem. all sensor data looks good.
I do not know WHY."
"nsh> tests all
Running all tests...
[led] STARTING TEST LED test completed, no errors. [led] PASS [int] STARTING TEST
--- 64 BIT MATH TESTS --- success: 354156329598 * 5 == 1770781647990
--- 32 BIT / 64 BIT MIXED MATH TESTS --- success: 64bit…"