hi, i also try to map buttons permanent to an s-bus channel. independent if an solex is running or not.
i have an penetrating ground radar system which can controlled via s-bus or pwm inputs. this was working perfect with old herelink firmware and rc channels 8-10. now i am unable to control my radar system.
also switch modes like stabelise or rtl, imo is much more secure if they mapped to an rc channel because solex or qgroundcontrol can crash. if this happens you are unable to switch modes. not good from safety and securety viewpoint.
/g
wolke