Hello,    I have a HC3 (sw 5.040.37). I try to use the S2 input on a fibaro dimmer 2. I connected a dimmeble lamp to the dimmer and it works whit the S1 switch. I connected S2 to another switchbutton. (I used Homey befor this and also used S2 to toggle Fibaro wall plugs. It worked great. Just had a flow when button S2 is puched turn on/off lichts and used also the same wallplugs as i have now).  I try to make it work on HC3 but no luck yet.    The light on S1 works, both