Deadbolt Lock/Unlock Status

I want to detect when my deadbolts are locked. First step is to trigger a switch, second is to send that signal to openhab.

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I see two places that might be used to trigger a switch: The rotation of the lock could rotate an arm, or when the deadbolt is retracted the end of the deadbolt could be used.

Putting switch at the end of the deadbolt would require cutting a hole into the back of the circular cavity the deadbolt sits in. Mounting in the unused space above or below the deadbolt would probably be best.

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