I see the buttons working in realtime, on the right hand side. But I cannot make any assignments, because they are all disabled over on the left hand side.
while you are using an RX2SIM, the buttons for calibrating 'button' functions (on/off channels) are greyed out. We recommend to use only proportional channels. The RX2SIM delivers all transmitter channels as proportional channels. That's the reason why you don't need the 'button' input channels.
Hmm. OK. Wasn't the case in the past since I had configured buttons previously.
Tried to use sliders, but the app wants to see a full throw on the slider. I can't seem to get that, even if I extend the end points on the TX - so I can't use the slider to trigger any function :(