SBUS amplitude PixracerR15 / ArduRover 4.4 too low for FrSky SBUS/PWM encoder

[kd0aij (Mark Whitehorn)]

The Pixracer should be actively driving 3.3V logic levels through a 1K resistor on the FrSky output port. If it isn’t, it may be damaged, or your wiring is bad.

You could instead try using Telem2 as I did in this blog post:

E-Flite Convergence with PixRacer and SBUS output

Previous conversions of the Convergence to ArduPilot have used the Pixhawk1 flight controller (E-flight converge default file, E-flight Convergence demo in Hokkaido), but the airframe is rather small, and a PixRacer fits more easily. The PixRacer has only 6 PWM outputs, and the Convergence needs 7 (3 ESCs and 4 servos). But the PixRacer does have a spare UART in typical configurations… and a UART can be used for SBUS output with capacity for up to 16 additional PWM outputs. Onboard video of h…