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Motion detector in Size 55 frame - indoor, anthrazite

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, anthracite

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
anthracite
anthracite
white
white
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).
Grauer Lichtschalter mit weißem Kippschalter auf dunkelgrauem Rahmen
Colour variants
anthracite
anthracite
white
white
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. 

360 Grad 3D

Our products in a new dimension.

Rotate the product in all directions, zoom in and experience it in three dimensions. This gives you a detailed picture of your favourite products.

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
#505050
anthracite
#ffffff
white

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

Schlüssel und schwarzer Funksender hängen an einer Garderobenleiste an der Wand.
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Deter burglars

Modernes weißes Haus mit Fenster, Schiebetür und Außenlampen am Weg
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Use the app

Lächelnder Mann hält Smartphone und gelbe Flasche in Wohnzimmer, unscharfer Hintergrund.
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Understand our products

Test
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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. 

Person auf Sofa hält Smartphone mit geöffneter Homematic-IP App, gemütliches Wohnzimmer.

The Homematic IP app

Configure all settings for your smart home in the Homematic IP app, which you can use to control, regulate and monitor your devices at any time. No personal data is collected except for the IP address.

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.

FAQ

FAQs

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

Service

Service

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

Dealers

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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Product Variants
Grauer Lichtschalter mit weißem Kippschalter auf dunkelgrauem Rahmen

Motion detector for Size 55 frames – indoor

Order information

Product Name (Short)
HmIP-SMI55-A
Item Number
159903A0
EAN Code
4047976599035

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°
Function type
Motion / presence detector
Connection
Wireless
Color
anthracite
Homematic IP User Guide

Version: July 2025

20.99 MB
Overview of QR code stickers
1.46 MB
Operating manual Motion detector in Size 55 frame - indoor, anthracite

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

3.7 MB
Datasheet Motion Detector for 55mm frames – indoor

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

962.55 KB
Declarations of conformity Motion Detector for 55mm frames – indoor, anthracite

Short description: HmIP-SMI55-A | Product reference: 159903AxA

129.16 KB