Are there plans to integrate wheel or motor encoders into the PX4 firmware as another form of navigation enhancement?
not sure what you mean specifically but here is some documentation on Rover
Hope this helps.
My bad, I should of been more specific. This is what I was referring to. http://ardupilot.org/rover/docs/common-wheel-encoder.html
I would also like to see geared motor encoder support (standard robotics type like https://www.servocity.com/165-rpm-hd-premium-planetary-gear-motor-w-encoder ). Under ardupilot rover supports using wheel encoders for nav enhancment also you can do GPS-less navigation when the wheel encoders are set up properly.