SwitchBotDoor Alarm Contact Sensor - Smart Home Security Wireless Window Alarm and Door Sensor, Add SwitchBot Hub Mini to be Compatible with Alexa (1 Pack)

This works as dual purpose alarm and smart sensor. Works better than expected. For me its used as a door alarm during evening to early morning. During the day used for automation in the house via alexa integration. Good value and well made.

Smart home systems can be clunky and difficult to use, but the SwitchBot ones are great. They work well straight out of the box. There is enough customisation available in the app so you can do what you want, without it being too technical and overly complicated. Would recommend.

This switchbot stuff works well but isn't compatible with tuya smartlife app. I can set up basic routines through Alexa but it will then lack all the 'extra' functions you get through the Switchbot app. Personally I'm moving away from the switchbot smart stuff

I've tried a lot of different contact sensors but this one is the only one with the motion sensor built in, which is brillant.Am using homebridge on RaspberryPi to make it even more integrated, now, when I go into the lobby, the motion sensor turns on my Hue lights, so I don't even need to open the door. Perfect!The only downside is I can't program the button to do anything - would have loved to be able to control this to set my Ring alarm when leaving the house, but not even the Homebridge plugin opens this up.If you have SwitchBot lights I'd imagine the button comes in very handy.Usual build quality from SwitchBot too, have loads of their products and always top notch.

These are the most reliable and battery efficient door sensors I have found.They are at first glance feature packed as they have multiple sensors built in. From the obvious door open and closed detection it also has built in... Ambient light level sensing, motion sensing (which when used in conjunction with the door open and closed sensor determines if you're vhave entered of left the room/building), temperature sensing and finally a button to trigger events or scenes.So what's the problem? Surely the reliability and all these features should get them a 5 star rating? Well yes they would... BUT...Most of these features aren't presented to other devices/frameworks such as Alexa or Smartthings. This means that the only features available to trigger an event or scene is the door open or closed sensor.This means it can't be used for launching a simple scenes such as turning the lights on when entering a room (and when it's dark) and off again when leaving the room.This is a major flaw and limitation. I'm can't say if this limitation can be overcome using something like IFTTT or Home Assistant.

Reliable, quick and easy to set up, decent price and great customer service.

Seriously well constructed piece of kit that combines multiple sensors in with a programmable switch. Really useful and far more than just a contact sensor

Smaller than my last door contact sensorWorks well with my old switchbot HubUsed with Alexa routines to switch lights on \ off with door opening on and off (approx 1-3 seconds wait time)Takes AAA batteriesVery happy with this product