Control Your Home
Apple’s HomeKit technology is designed for convenience. When you add smart devices like lights, motion sensors, door locks, and security cameras, you can activate them from your phone or with a Siri request. So it just makes sense to be able to do that from your wrist. The Home app lets you control HomeKit-enabled home automation accessories you own.
Accessories and scenes that you mark as Favorites in the Home app on your other Apple devices also appear in the Home app on your watch. You can then control them with a tap or by using Siri.
Control Lights and Accessories Using the Home App
Open the Home 
app to view your accessories. ...
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