Control multiple devices with one button or slider

Is it possible to control multiple devices with one button or slider. Say for instance I have 3 outside lights at different locations, each with their own esp8266 connected. I would like to be able to dim all 3 simultaneously or switch them on and off simultaneously. Is this possible? If so how would you do it?

Thanks Dimitriy. I suppose RTFM (Read The Fu… Manual) applies here. Thanks for the quick response.


Funny? Lol, Just kidding… :blush:

A post was split to a new topic: Can I have both individual buttons and the tagged button?