New test version 0.4.0:
- Added flow cards to control music distribution to MusicCast devices.
Functionality:
- Add a client to a server group. Add this flow to your server device, the slelect a client which should be added to the group.
- Removes server group and client assignments.
- Start/stop distribution
These flow cards are added only via API description. I can’t test with only one device. You need at least two devices to start creating groups and add devices.
Please report issues or also if all is working. Good luck 
@Hans_Van_der_Eijk: FYI and something for you to try.
