Here we explaining in details how to install and configure the Sonoff DW1 433Mhz door/windows alarm sensor.
This is the part of our video series about smart home.
Thanks to this sensor you can see when door or window of your house/department were opened and closed.
With eweLink mobile app you can configure actions that should be executed if one or any of the sensors were triggered.

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Apart of Sonoff DW1 sensor - [ Ссылка ]
You also will need the 12V Battery - [ Ссылка ]
And Sonoff RF bridge - [ Ссылка ]

Note, you can connect up to 4 sensors/controls to the RF bridge.

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