Smart opening sensor: Optical window and door contact from Homematic IPThis opening sensor from Homematic IP serves as an optical door and window contact and fulfills several purposes at once. On the one hand, it can improve the energy efficiency of the heating system and at the same time it serves as an access control. It can be linked to thermostats (see accessories) and regulates the heating output accordingly when the door or window is opened. In addition, the opening status can be tracked via app. If the opening contact is coupled with a siren, an alarm can be triggered in the event of unauthorized opening.For use, integration via a control center is mandatory. Both the Homematic IP Access Point and the CCU3 control center from Homematic IP are available separately via the accessories.Functions/Compatibility- Homematic IP offers integration of indoor climate, security, fire and water protection, weather, lighting and shading - easy to install, easy to expand and easy to secure- De