Motion Detector Homematic IP HmIP-SMI55-2 55mm frame for indoor use

The Homematic IP motion detector HmIP-SMI55-2 for 55 mm frames is an indoor passive infrared sensor designed to detect human motion and provide reliable occupancy information for smart home automation. Built for installation in standard 55 mm switch frames, the sensor integrates with Homematic IP systems to trigger lighting scenes, alarm functions or other event-driven actions. The compact device is intended for room-level detection and works as part of a connected security and automation setup.

Advantages

The motion detector offers sensitive passive infrared detection optimized for indoor use and compatibility with standard 55 mm wall frames, enabling discreet integration into existing switch layouts. It communicates with the Homematic IP platform to deliver event-based signals for immediate automation responses and supports stable operation within a home network. The compact form factor and focused sensing angle reduce false triggers from adjacent rooms while providing consistent occupancy detection.

Suitable for

• Detecting room occupancy to control lighting automatically
• Integrating motion-based triggers into Homematic IP alarm scenarios
• Automating HVAC or ventilation based on presence
• Use in corridors, living rooms, bedrooms and utility rooms where 55 mm frames are used

Key specifications

• Sensor type: passive infrared (PIR) motion sensor for indoor environments
• Mounting: designed for 55 mm standard switch frames for flush installation
• Detection: presence/motion detection for room-level monitoring
• Integration: communicates with Homematic IP smart home platform for event triggers
• Form factor: compact module sized to fit into switch frame dimensions

How to use

Install the motion detector into a compatible 55 mm switch frame according to local electrical regulations and the Homematic IP installation instructions. After mechanical mounting, add the device to the Homematic IP system using the platform's pairing procedure. Configure detection zones, sensitivity and assigned automation actions or alarm responses within the Homematic IP app or central unit. Test detection coverage after installation and adjust position or frame orientation if necessary to achieve the desired sensing range and to minimize false activations.

Recommendations

Place the sensor at a height and location that provides clear line-of-sight to the monitored area; avoid pointing it directly at heat sources, windows with strong sunlight or ventilation outlets. Perform a functional test after configuration and periodically check sensor alignment to maintain reliable occupancy detection within Homematic IP automations.