Control IKEA Tradfri dimmable bulb with Fibaro Dimmer S2


I am using Fibaro Dimmer 2 to control a standard (“non-smart”) dimmable lamp.
I also have a second dimmable bulb from IKEA “Trådfri” in another socket in the same room. I control the second bulb by reading S2 scenes from Fibaro Dimmer 2, but only standard toggle on/off.

My problem is that I can’t manage to create a working piston to be able to use and control the dimming functionality of the second smart bulb from IKEA (“Trådfri”).

Please see the latest piston I tried without sucess:

I have played around for days and searched for working dimming pistons without success.

Hopefully any of you guys can help me out.