I have frsky x8r receiver and also the Multiwii Pro w/mtk gps flight controller. Is it possible to run sbus on Multiwii, if so, is it just a case of connecting to a serial port and defining it in the config.h?
To be honest I don’t remember anything about multiwii as I have not touched it for a good couple of years as it is no longer active. It might run sbus, but frsky sbus is actually inverted so even less likely. Sorry I can’t be much help.
This would be the best place to find the answer:
http://www.multiwii.com/wiki/index.php?title=Main_Page
But my suggestion is to rather get a newer flight controller that runs the latest firmware like betaflight or iNav. The link below discusses the various projects if you are interested 