Sonos Group volume control with a Hue Tap Dial Switch

[Matheoux]

Hello. I have little experience creating flows. I have a Cinema Room with Sonos speakers. I have 2 groups of speakers and I want to be able to control the volume of the “cinema speakers” GROUP through a Hue Tap Dial switch. I have the Hue dial switch connected through a Hue hub to Homey. I’m trying to make a simple flow that when I rotate the switch clockwise to increase the volume of the group. Homey sonos app only provides me with the option to change the speaker group volume to a percentage, meaning that I would need to increase that value little by little while rotating the dial. To do this I need to extract the current volume value of any of the speakers belonging to the group so then I can increase the volume percentage with some delay to avoid problems. How can I retrieve the value of the volume of a speaker? Why does the sonos app only provides SET functionalities? Is there any way I could maybe get the value from the homey devices information? I would appreciate if anyone could point me in the right direction. Thank you very much for your help.