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Door/Window sensor

 I'm wondering if there's a door or window sensor that would allow me to tell if a window or door is open /closed

I'd like you use the sonoff  to turn on a heating source if a room is colder then a certain temperature  but only if the window is closed

18 people like this idea

A product exists but currently only shows that a door/window has been opened.

It would be good if the sensor also reported when the door/window is closed. This is very useful for a few uses like the above or in conjunction with the inching unit to know remotely if eg. a garage door has been left open .


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Very simple solution with a sonoff inching circuit which they can implement. Search the forum for garage door sensor and u will find suggested solutions of which one I have posted. But they don't seem to think that this would be in demand
Any advance on this? I really need help knowing if door was left opened.
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