Window and door contact – optical, plus

Detect open windows instantly and make your heating or alarm function even smarter. And do it easily via the window and door contact with its very long battery life. 

Guarding your windows for a very long time.

Your windows are a source of fresh air for many hours a day, especially during the summer months. However, frequent airing can be a challenge for smart window and door contacts: Permanently detected opening eats away at the battery charge. The solution: The Homematic IP window and door contact – optical, plus It has two batteries for extra long life and will not let you down prematurely! 

Haus mit Schutzschild

Monitoring for a secure home

You can immediately detect the opening or closing of windows and doors via the Homematic IP app. 


In combination with a Homematic IP alarm siren (e.g. HmIP-ASIR-2), your home becomes even more secure. Because it automatically triggers a loud alarm when a window or door is opened.


Extra long battery life 

With normal window use, the two batteries allow you to benefit from up to four years of contact life.


Fresh air without wasting energy

The room temperature is automatically lowered during ventilation when you connect the window and door contact to Homematic IP radiator thermostats. 


You can even determine the lowering temperature individually. The comfort temperature is automatically restored as soon as you close the window.

Handy mit Auge

Everything in view when you leave the house

In the Homematic IP app you can always check whether all windows are closed - even when you're out and about. 

Your advantages at a glance

Do you want to live more safely, save money and protect the environment, or simply increase your living comfort? There are many good reasons for a Smart Home. Find out more now!

Control access

Deter burglars

Homematic IP Alarmsirene außen an Hauswand

Use the app

Understand our products


05. July 2023

Travel with a safe feeling: How to protect your home with smart home technology

No one there to look after the house during the holidays? No problem, because your Smart Home protects itself: It keeps burglars away and lets you know immediately if something should happen.

Find out more

Homematic IP: Smart living. Simply exciting.

Homematic IP means modern, flexible and secure technology from the European market leader*. Let the advantages of our system win you over, and start living smarter straight away. 

With some smart home providers, you have to make a choice: Do you have everything wired, or do you go fully wireless? Some systems are also hermetically sealed and do not accept devices from other manufacturers. Here at Homematic IP, we have a different approach. We are guided by you!

The Homematic IP app

Configure all the settings for your smart home in the Homematic IP app, and use it to control, regulate and monitor your devices whenever you want – without providing any personal data!
A smart home system is particularly robust, interference-proof and reliable when the devices communicate with each other via wired connections. And data transmission is very fast with cables, too. That all comes together with Homematic IP Wired.

Always here for you and your queries.

Whether you have a question about a product, something isn’t working as you wanted, you’re looking for a specialist partner, or you simply want to give us feedback: we are always here to help.



This is where you’ll find the most important questions and our answers about our smart home solutions.



Have you purchased a Homematic IP product and now have questions about how it works? Our technical support team will be happy to help you.

Installateur Suche

Specialist tradespeople

Are you looking for a good specialist tradesperson near you? Simply use the convenient search function here on our website.

Händler Suche


You can get Homematic IP products and good advice all over Germany. Find the right dealer near you here.

Innovations, ideas, impulses: your news

Get first-hand news about the latest innovative smart home solutions. 

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