I use it as a door sensor to the entrance door. One has to adjust the way in smart home that you can notify multiple recipients by email or SMS if the door is opened. This usually happens within 1 minute. If one couples the door sensor to smoke detectors of RWE SmartHome, such as can the defined profile "Vacation" activate the smoke detector alarm and send SMS when the door is opened. For who want to have it for sure, you can turn on the light even in the hallway to get better shots, for example to allow the surveillance camera.
