Smart Things Multipurpose Z-Wave Door Sensor 0.39in High Sensitivity Independent Trigger Wireless Door Sensor for Wireless Alarm Systems

I wanted this device so that I could wire it into my existing battery-powered doorbell system and effectively make it into a smart doorbell. It connected immediately with my Hubitat Elevation hub and tested fine using the magnetic component. I intended to have it "normally open" and wanted to be sure it would trigger when "closed" which it did. You can capture it opening or closing. It was also easy to dismantle and solder some bell wire across the reed switch. After that, cut into the wire to the doorbell push switch, inserted a chocolate block connector and connected the wires from this magnetic sensor. After than, every time someone rings my doorbell I get an alert on my phone and my wife's phone (even if we're out at the time) and it doesn't interfere with the workings of the doorbell. It's a good price for a Z-Wave magnetic switch - I needed it to be not too expensive since I wasn't sure whether I would end up breaking it.

Just bought a second batch of 2 of these and they seem to be working fine, interfacing with a Z-WAVE.ME ZMEEUZB1 Z-Wave USB dongle, Home Assistant running in a docker container on Debian Buster.These work on my front door which is 20m and 3 walls away, whereas the Aoetec door sensors would not work over that distance and had to be returned.Word of warning though, these sensors need alkaline batteries, sadly 1.2v rechargeables only report ~65% battery level when freshly recharged and don't seem to allow the sensor to communicate with the controller over the above distance.

Works great with OpenHab although once paired I had to press the wake button (tamper switch) a few more times before it was fully added to OpenHab in order to get notifications working even though it was showing the device as Online. The device does take 2 AAA batteries (not supplied) so you might want to invest in some Energizer Lithium batteries to keep them going strong for a good few years!!The sensor offers a much cheaper alternative than Aeotec or Fibaro door contact sensors. Sensor is very responsive to. Just ordered a second one!!Overall very very pleased.Only slight problem is the height of the thin magnetic part which isn’t the right height if mounted on a PVC frame. The height difference is out by a significant amount which won’t work with the sensor as the height difference is too great. Only solution is to build up the height of the magnetic sensor on the right in the photo using some Lego bricks and glueing this to the frame prior to sticking the magnetic strip to the Lego bricks. A better solution is to print a 3D part which isn’t a problem if you can get it 3D printed.

Used for garage door mounted with adhesive pads

Just getting started with z-wave and home assistant. Easy to mount, and I've had no issues with range of approx 3 meters through interior and exterior walls.

A bit bigger than I'd like but works really well with home assistant.

Instructions are printed a bit small. As they say, inclusion needs to be within 1.5m of the controller, but after that the sensor works for me about 10m from the controller. I'm using it with Razberry, which identifies it correctly.

This is a very good sensor, I prefer it to other brands I have tried, strong connectivity, little light on the main box to show when it is changing state.