I have connected Pixracer 1.0 and tfmini via Telemetry1, it is powered by external 5v 3a power BEC and sharing GND with Pixracer. The settings on arducopter V3.6.5 are:
RNGFND_TYPE 8 (lightware serial)
I have tried both standard and Pix Mode, on standard mode it says Bad Lidar Health but when I change to Pix Mode the Bad Lidar health message no longer appears but I get sonarrange 0 no matter what I do. I can get this thing work on anything but Pixracer (even omnibus f4 has no problem with arducopter and tfmini). Anyone had similar issues and know how to solve that ?