Fibaro Dimmer & Retractive Switch

So you set parameter 20 to 2 for the roller blind mode where rocking the switch one way brightens and the other way dims?

If you set it to 0 just test dimming and control from S1 do they behave correctly?

For the DTH I use the embedded one for local operation. The best and most fully featured 3rd party one is the one by codersaur.