Machanical lock sensor
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I was thinking more of something like this. The switch could be installed inside the dead bolt hole in the door frame. The dead bolt when engaged would depress the switch. It will require some mechanical skills to get it installed in the door frame.
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How would you propose to mount it so the action of the dead bolt would activate it?
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Thanks for the quick reply.
My idea is to design it in such that it can be installed by anyone; after market (even the 100 year old granny :-))
No wires and works from a Lithium battery; with the capability to upgrade to Bluetooth, connection to a smart phone.What you guys suggest is mechanical and can fail due to dust, rain and bugs.
What I have in mind is a type of proximity sensor, small enough to go between the door and frame (close to the deadlock) to monitor its position, thus it will only work with door locks that have a latch and deadlock. The other types I will think about on another occasion.
Three types of sensor came to mind, hall sensor, capacitance and Optical. My problem is SIZE. Some gaps are 1mm or less (but of course we need to be realistic and draw the line of how small do we go).
If anyone knows about a sensor that will detect a deadlock and is small enough to go between the door and frame.... please help.
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I found those "authorized" and they are damn expensive
http://hansenlellinge.dk/produkter/11-el-laase-og-tilbehoer/10423-effeff-slutblikskontakt-877/
http://hansenlellinge.dk/produkter/11-el-laase-og-tilbehoer/10408-assa-slutblikskontakt-82/
