Hello there,
I would like to share that after some struggles I was finally able to send dimming commands from Home Assistant (on Hassio/Raspberry PI) to a led bulb via a Fibaro Dimmer 2 using the Zwave Aeotec Stick 5.
One way - until I learn how to draw a dragging bar instead - is by using the service entry in the developer tools in the lower left of the HA UI - see snapshot. Setting the brightness_percentage 1…100 does the trick. Repeating turn-on with different brightness levels performs the actual dimming.
Cheers,
Marius