Am I the only one who still has yet to understand the value proposition of a smart home [outside wifi + sonos]? The trade off isn't a clear win to me for me to automate everything else. If it was I would try a raspberry pi set up.
The "smart" approach would be having all of them wifi enabled, and then being able to change colour, intensity, duration, etc. via web or app. You know what also works just as well for that though? One or two push buttons on each detector lol.