Motion detector in Size 55 frame - indoor

Detect movement inside your home with the motion detector in a Size 55 frame, and automate your lighting control or alarm mode in your smart home.

Motion detector in Size 55 frame - indoor

Motion detected indoors

In the morning while still a bit sleepy, you're looking for the kitchen light switch - and it's annoying. Wouldn't it be great if the light always turned itself on where you're walking to at that moment. What sounds like the stuff of dreams has long been possible with the Homematic IP motion detector for Size 55 frames. The detector recognises any movement, switches on the light or reports an alarm on request. If necessary you can also switch on the light manually with the button. 

Colour variants
white
white
anthracite
anthracite
Haus mit Schutzschild

More convenience and security 

When there's movement, the light is switched on depending on the brightness level. On request, an alarm is reported within your security solution. 

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Depending on the brightness level in your room, the light is only switched on when you really need it - for more convenience and energy savings. Integrated into a Homematic IP security solution, the motion detector can also trigger an alarm besides switching on the light.

Batterie

Reliable energy supply 

The power supply works by batteries or with a power supply unit for brand switches. 

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Two micro-batteries supply the unit with power for an average of two years. When integrating the motion detector into a Homematic IP security solution, you need a Homematic IP power supply unit for brand switches (HmIP-BPS) for the power supply..

Design mit Pfeil

Great flexibility thanks to a modular design

Use the motion detector individually. It's built in such a way that it can be installed with maximum flexibility:

  • Integration into existing switch series with a Size 55 frame size of the most popular manufacturers 
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  • Adhesive or screw mounting in the supplied interchangeable frame with the supplied mounting material 
  • Mounting on a free flush-mounted box with the mounting plate optimised for this purpose 
  • Integration into the Homematic IP desk stand (HmIP-DS55) for a longer battery life 
  • As an alternative to battery operation, the wall thermostat can also be supplied with 230 V via the Homematic IP power supply unit for brand switches (HmIP-BPS).
Colour variants
white
white
anthracite
anthracite
Schalter und Person mit Pluszeichen

A motion detector and switch in one 

Control functions and devices in the smart home at the touch of a button, even independently of motion detection.

Spaß an Technik

Reliable and fail-safe

An alarm can be triggered even if the internet connection is inactive, as the devices communicate directly with each other. 

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If, for example, a burglar were to destroy an Access Point, the other devices would continue to be active. 

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Die passende Farbe zu jeder Wandoberfläche - 
Probieren Sie es aus!

Mit unserem Design-Simulator wählen Sie zunächst eine Wandoberfläche aus. Dann lassen Sie sich darauf ein Homematic IP Produkt anzeigen. So sehen Sie auf einen Blick, welche Kombination am besten passt.

Background
concrete
plaster
beige wall paint
blue wall paint
tiles 1
tiles 2
wood
children's room
Color
#ffffff
white
#505050
anthracite

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

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Deter burglars

Homematic IP Alarmsirene außen an Hauswand
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Use the app

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Understand our products

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05. July 2023

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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. 

Homematic IP
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!
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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!
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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.
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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.

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

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Product Variants

Motion detector for Size 55 frames – indoor

Order information

Product Name (Short)
HmIP-SMI55-2
Item Number
156242A0
EAN Code
4047976562428

Technical data

Supply voltage
2x 1.5 V LR03/micro/AAA
Typical battery life
4 years (typical)
Degree of protection
IP20
Ambient temperature
5 to 35 °C
Dimensions with frame (W x H x D)
86 x 86 x 21.5 mm
Dimensions without frame (W x H x D)
55 x 55 x 20 mm
Weight
90 g (including batteries)
Radio frequency
868.0-868.6 MHz/869.4-869.65 MHz
Typ. open area RF range
150 m
Detection range
6 m
Detection angle horizontal
110°
Detection angle vertical
30°
Homematic IP User Guide

Version: July 2025

20.99 MB
Overview of Homematic IP QR Code Stickers
50.09 KB
Datasheet Motion Detector for 55mm frames – indoor

Short description: HmIP-SMI55-2 / HmIP-SMI55-A | Product reference: 156242A0 / 159903A0

962.55 KB
Declaration of conformity Motion Detector for 55mm frames – indoor

Short description: HmIP-SMI55-2 | Product reference: 156242AxB

128.81 KB