Hello,
I'm using the mamba F405 FC stack with a radiomaster R88 receiver and radiomaster X16s transmitter. I'm using these components to control a tank, rover vehicle. I have all the components working properly in Betaflight. I have 2 motors and can drive the tank forwards and backwards. I have the motors configured as bidirectional and the 3D motor configuration in Betaflight is set for the high, middle and low range of the throttle control.


I can't figure out how to get the yaw (right, left) to work, so I can't turn the tank. What should happen when I use left or right yaw is that the motors should turn in opposite directions. The Betaflight receiver tab shows all the controls on the transmitter working correctly. Any idea what I need to do to get the yaw control working?

Thanks

You won't be able to do it with Betaflight. The whole concept behind the PID controller in the Betaflight firmware running on a flight controller is to tilt the onboard gyro to a designated setpoint and have authority over the individual motors and servos in order to achieve that without the aircraft tumbling out of the sky, You therefore aren't going to be able to configure Betaflight to manually control individual motors for the wheels of a ground based vehicle.

For what you want to do you will need to look at using something like ArduPilot firmware instead...

https://ardupilot.org/rover

INAV can do some of this.

Pawel has a video on the topic and also a couple of tutorials doing this with INAV:



https://quadmeup.com/how-to-setup-inav-on-a-rover/

https://quadmeup.com/inav-for-tracked-rovers/

This should be possible with a custom motor mix in Betaflight, but I agree it would be much easier to just use iNav.

https://rotorbuilds.com/build/26600

another vote for arduino :-) just because of that example above, not from experience. maybe you can get nice aupport from the guy on rotorbuilds for your tank and arduino

thanks everyone for your suggestions. I'm trying the latest version of INAV on my tank rover.