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by nicholasjarnold 940 days ago
Schlage makes some that use ZWave Plus (500 series or better, didn't check the spec sheet). I have an older model that works nicely for this.

https://www.schlage.com/en/home/smart-locks/connect-zwave.ht...

This would give you the "is locked or not" capability you seek here, but obviously requires a replacement of your door lock (perhaps not trivial if renting, but is a very easy DIY otherwise).