A motion detector used to perform a simple task: detect movement and switch something on. In connected environments, that same event can become a data point that triggers lighting, changes HVAC operation, activates security systems, updates an occupancy model or initiates an automation sequence.

That shift is giving motion detectors a more important role inside the semiconductor ecosystem. IoT Analytics estimated that the number of connected IoT devices would reach 21.1 billion by the end of 2025, up from 18.5 billion in 2024. It expects the installed base to reach 39 billion by 2030.

For motion-detection hardware, the implication is straightforward: every new connected environment creates additional opportunities for sensing nodes, processors, wireless connectivity and power-management semiconductors.

The Sensor Stack Is Getting More Intelligent

The modern IoT motion detector is rarely just a sensing element. A typical architecture can combine a sensing technology, analog front end, microcontroller or processor, wireless connectivity, power-management circuitry and firmware.

Movement → Sensor → Signal processing → Local decision → Wireless communication → Cloud / Edge platform → Automated response

This architecture is changing what manufacturers compete on. Sensitivity still matters, but so do false-alarm rates, response time, battery life, privacy, communication range and the ability to distinguish meaningful activity from background movement.

PIR Is Still Important but Radar Is Changing the Conversation

• Passive infrared sensors remain widely used because they can detect changes in infrared radiation associated with moving people or objects while consuming relatively little power.
• Radar-based sensing introduces a different capability. Matter 1.4 specifically expanded occupancy-sensing capabilities to support radar, vision and ambient sensing technologies, together with configurable sensitivity and event-based reporting.
• The specification also identifies a pathway toward capabilities such as person detection and activity classification.
• That distinction is important. The industry is gradually moving from asking “Did something move?” toward “What is happening in this space?”

Why mmWave is Becoming More Interesting?

Millimeter-wave radar can provide richer information than conventional motion sensing, including the ability to detect very small movements and support presence detection even when a person remains relatively stationary.

For smart buildings, this can matter in situations where conventional motion sensors may stop detecting a person who is sitting at a desk. More precise occupancy information can potentially help coordinate lighting, heating, ventilation and air-conditioning systems.

The semiconductor opportunity therefore extends beyond the radar transceiver itself. It includes signal-processing chips, embedded processors, connectivity ICs and increasingly sophisticated software algorithms.

Battery Life Is Becoming a Design Metric

Many IoT motion sensors are installed in locations where replacing batteries frequently is inconvenient or expensive. This makes ultra-low-power semiconductor design particularly important.

The Connectivity Standards Alliance’s Matter 1.1 update specifically strengthened support for Intermittently Connected Devices, including battery-powered motion sensors, contact sensors, temperature sensors, switches and locks.

Matter 1.4 subsequently introduced Long Idle Time and a Check-In Protocol intended to improve communication and battery performance for intermittently connected devices.

This puts the semiconductor design target into a simple equation:

More sensing intelligence + less active time + fewer transmissions = longer operating life

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Matter Is Making Interoperability More Relevant

• A motion detector becomes considerably more useful when it can work across multiple smart-home ecosystems rather than being locked into one manufacturer’s platform.
• The CSA’s Matter 1.6 release in June 2026 continued this direction by improving setup, multi-ecosystem experiences and context-driven control.
• The market is consequently moving toward sensors that are not merely connected but interoperable.

A Real-World Product Signal

The transition is already visible in certified products. The Connectivity Standards Alliance lists the Zemismart Motion Detector, certified in November 2025, as a Matter-compatible device supporting Thread and Bluetooth connectivity for movement detection, occupancy monitoring, lighting control and energy-saving applications.

This illustrates how several semiconductor functions are converging inside one compact sensor: detection, wireless communication, processing and low-power operation.

Beyond Homes into Buildings and Industrial Spaces

The opportunity is expanding well beyond residential automation. Motion and occupancy information can support smart offices, warehouses, retail facilities, healthcare environments, factories and security systems.

The broader IoT landscape reinforces the scale of this opportunity. A 2025 global IoT device analysis reported 25.7 billion devices across building automation, security and surveillance applications, although this figure covers a broad category rather than motion detectors alone.

For motion-sensing semiconductor suppliers, this creates several distinct application paths:

• Smart lighting and occupancy control
• HVAC optimization
• Security and access systems
• Industrial automation
• Retail analytics
• Healthcare monitoring
• Smart-home automation

Privacy Is Pushing Intelligence toward the Edge

One of the most interesting changes is the growing preference for local processing. A sensor that can determine occupancy locally does not necessarily need to transmit continuous raw sensing information to a cloud platform.

This approach can reduce network traffic and support privacy-sensitive environments. It also places greater importance on microcontrollers, edge AI accelerators and embedded signal-processing capabilities.

The result is a subtle but important transformation: the motion detector is becoming a small edge-computing device rather than a simple switch trigger.

The New Value Proposition Is Context

The next generation of IoT motion detectors will increasingly be evaluated by what they can understand rather than simply what they can detect.

Motion detection → Presence detection → Occupancy estimation → Activity recognition → Context-aware automation

That progression is already reflected in Matter’s expanded sensing framework and the broader movement toward interoperable, low-power connected devices.

With connected IoT devices already measured in the tens of billions and standards increasingly supporting radar, occupancy and battery-efficient sensing, motion detection is becoming an important semiconductor building block for the next generation of responsive environments.