SONOFF SenseGuard SNZB-03PR2 Zigbee Motion Sensor | Gen2 Motion Sensor with Light Sensor

Sonoff SNZB-03PR2 SenseGuard Gen2: The ultimate Zigbee motion sensor with continuous lux measurement

Are you looking for a smart sensor that not only turns on your lighting when there is movement, but also knows exactly when it gets too dark in the house? With the new Sonoff SNZB-03PR2 (SenseGuard Motion Gen2), you get a powerful upgrade compared to its predecessor. While traditional motion sensors only perform a light measurement when there is movement, this Gen2 variant has a completely independent light sensor. This continuously reports the exact Lux values to your smart home hub. This makes it the ideal Sonoff sensor for precisely controlling automatic blinds, roller shutters, and mood lighting based on daylight.

True, continuous Lux measurement without dependence on motion

The biggest advantage of the SNZB-03PR2 is the evolution of the built-in light sensor. The older SNZB-03P only provided a quick snapshot of the light conditions when motion was detected. The R2 version continuously measures the actual light intensity in Lux and maintains this history. This allows you to set up an automation that reacts purely to daylight threshold values.
For example, turning on mood lighting if the living room drops below 30 Lux, even if everyone is sitting still on the couch.

Wider detection angle of 120° and updated Gen2 Telink chipset

In addition to the superior light sensor, Sonoff has also significantly updated the hardware of this motion detector. With a wider viewing angle of 120° (compared to 110° for Gen1), the sensor covers larger corners, hallways, and passages without creating blind spots. Thanks to the updated Gen2 Telink chipset, the sensor reacts lightning fast and you benefit from a robust Zigbee 3.0 connection with low latency and optimal energy consumption.

Ecosystems & Compatibility

• Home Assistant: Works excellently via ZHA and Zigbee2MQTT (Z2M). Unlike the first generation, you immediately have access to a full-fledged, separate Lux entity, including the option for offset calibration.
• Homey Pro: Can be directly linked via the official Sonoff Zigbee app on Homey, allowing you to seamlessly use the Lux values and motion detection in your Advanced Flows.
• SmartThings: Connects flawlessly with the Samsung SmartThings Hub via the Zigbee 3.0 protocol to create smart automations based on motion and light.

Pro-Tip from slimhuisje.nl: Link a desired light intensity threshold (e.g., 30 Lux) to your evening scene. Because the SNZB-03PR2 continuously transmits the light value, your lights will automatically turn on on a dark, rainy afternoon, long before the clock reaches the official sunset!

Functionalities & Physical Actions

• Independent and continuous Lux light measurement with real-time reporting of the exact light intensity.
• Wider detection angle of 120° with a range of up to 6 meters.
• Adjustable cooldown/blind time between 5 and 60 seconds for quick or delayed re-detection.
• Equipped with an updated Gen2 Telink chipset for superior Zigbee 3.0 network stability and fast response time.
• Long battery life of up to 3 years on a single CR2477 coin cell battery.
• Support for Lux offset calibration in advanced smart home platforms.

Package contents and dimensions

• 1x Sonoff SNZB-03PR2 SenseGuard Motion Gen2 Zigbee Motion Sensor
• 1x CR2477 coin cell battery (included)
• 1x Adjustable mounting base with tape and screws
• 1x Manual
• Product dimensions: 44 x 44 x 35 mm

Please note: To use this sensor, a Zigbee 3.0 gateway or coordinator is required, such as a Zigbee USB controller for Home Assistant, a Sonoff Bridge, or a compatible smart home hub.

Technical specifications

Frequently Asked Questions (FAQ)

How does the SNZB-03PR2 differ from the older SNZB-03P?

The SNZB-03PR2 continuously measures and stores the exact light intensity in Lux, while the older variant only took a quick light measurement at the moment of motion. The R2 also has a wider detection angle of 120° (compared to 110°) and an updated Gen2 Telink chipset for more stable Zigbee 3.0 communication.

Is the CR2477 battery included and how long does it last?

Yes, the sensor comes with 1x CR2477 battery included. Thanks to the efficient Zigbee 3.0 protocol and optimized Gen2 hardware, the battery lasts up to 3 years.

Can I use the light sensor for automations without motion?

Yes, absolutely! Because the Lux sensor reports independently and continuously, you can, for example, have roller blinds, sun blinds, or mood lighting react to the current light intensity in the room, regardless of presence.

Does this sensor work standalone or do I need a hub?

The SNZB-03PR2 works via Zigbee 3.0 and requires a compatible Zigbee coordinator or hub. This can be a Zigbee USB controller for Home Assistant, a Homey Pro, a Sonoff Zigbee Bridge, or a Tuya hub.

How do I set up the sensor in Home Assistant?

Within Home Assistant (via ZHA or Zigbee2MQTT), the SNZB-03PR2 appears directly with a separate Lux entity, a motion entity, and the option to adjust the cooldown/blind time. You can also set a Lux offset if you want to calibrate the measurement.

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