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Yes, multiple Kasa devices can be combined to work together using smart actions within the Kasa app. They can be set to turn on/off with the switch. There's a slight delay, but it works fine. If you use a hub such as Smartthings, there might be even more options on when the actions activate and set more rules.
Sorry, there was a problem. Please try again later.Yes, you create a group in the app. In my home office, the main light switch also activates two lamps via their respective smart plugs.
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