Updated July 2021.
- Create a Simulated RGB Bulb, it will the the master bulb for the group. Alternatively, you may chose to designate one of the existing RGB bulbs as the master
- In SmartThings mobile app select Automations, tap +, select Add SmartApp, select Color Coordinator
- Select the master RGB bulb as the Main Light
- Select other lights that will follow the master
Now, the master bulb can be added as a Tile! It will control all RGB bulbs in the group.
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