Winner
Updated November 2026
Data from the official Sonoff site.
2026 verdict
Two Sonoff Zigbee motion sensors from the same line, and the Sonoff SNZB-03P ZigBee Motion Sensor still comes out ahead of its newer Sonoff SenseGuard Motion Gen2 sibling on platform reach.
The Sonoff SNZB-03P ZigBee Motion Sensor works with Alexa, Google Home, SmartThings and Home Assistant, and reaches Apple Home and Matter through a Sonoff hub, while the Sonoff SenseGuard Motion Gen2 lists Alexa and Home Assistant but has no Google Home, HomeKit or Matter path and its SmartThings driver does not recognise it yet. The Gen2 does win on sensing: it reports true lux values with months of history and a detection angle of 120 degrees, against the older model's dim-or-bright flag and 110 degrees. Pick the older sensor for the widest ecosystem, and the Gen2 when precise light readings matter more than reach.
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| Feature | Sonoff SNZB-03P ZigBee Motion Sensor | Sonoff SenseGuard Motion Gen2 | Winner |
|---|---|---|---|
| Rating | 4.3 | 4.0 | Sonoff SNZB-03P ZigBee Motion Sensor |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Alexa, Home Assistant | Sonoff SNZB-03P ZigBee Motion Sensor |
| Angle of Detection | 110º | 120° | Sonoff SenseGuard Motion Gen2 |
| Price | $16.50 | $16.50 | Tie |
| Battery Life | 3 years | 3 years | Tie |
| Connectivity | Zigbee | Zigbee | Tie |
| Sensors | Motion, Light | Motion, Light | Tie |
| Alerts | Motion Alerts, Low Battery Alerts | Motion Alerts | Tie |
| Range of Detection | 19.7 ft 6 m | 19.7 ft 6 m | Tie |
| Local Control | YES | YES | Tie |
What the differences mean
Light sensing
The Sonoff SenseGuard Motion Gen2 reads actual illuminance values and keeps up to six months of light history, which is what makes light-conditioned automations possible. The Sonoff SNZB-03P ZigBee Motion Sensor reports only dim or bright, enough to trigger a lamp after dark but too coarse to tune a threshold.
Detection angle
The Gen2 covers 120 degrees and the older model 110, a small paper difference that changes little in a hallway. Both reach about 6 metres, so placement still decides how well they catch movement.
Platform support
The Sonoff SNZB-03P ZigBee Motion Sensor works with Alexa, Google Home, SmartThings and Home Assistant and reaches Apple Home and Matter through a Sonoff hub. The Sonoff SenseGuard Motion Gen2 lists Alexa and Home Assistant only, with no Google Home, HomeKit or Matter.
SmartThings readiness
The older sensor is recognised by SmartThings today, while the Sonoff SenseGuard Motion Gen2 advertises it but the current Edge driver still targets the previous model. If SmartThings is your only hub, that support is pending rather than present.
Cooldown control
The Gen2 exposes a cooldown you can set from five to sixty seconds, so it can re-trigger fast in a busy hallway or hold back in a quiet room. The older model supports a timeout too, but the Gen2 makes the range explicit.
Which one to buy if
- your smart home runs on Google Home, SmartThings or Apple Home
The Sonoff SNZB-03P ZigBee Motion Sensor lists those platforms, while the Sonoff SenseGuard Motion Gen2 stays within Alexa and Home Assistant.
- you need the sensor to report real light levels
The Sonoff SenseGuard Motion Gen2 measures true lux and stores history, so automations can branch on how dark a room actually is.
- you want a proven, cheap trigger for Home Assistant
The Sonoff SNZB-03P ZigBee Motion Sensor is widely praised for pairing instantly and triggering in about a second over Zigbee2MQTT or ZHA.
- you want to tune how quickly motion re-arms
The Sonoff SenseGuard Motion Gen2 lets you set the cooldown anywhere from five to sixty seconds to suit a busy room or a calm one.
- SmartThings is your only hub
The Sonoff SNZB-03P ZigBee Motion Sensor works on SmartThings today, while the newer Sonoff SenseGuard Motion Gen2 still needs its driver to catch up.
Winner
$16.50
- + Rating: 4.3
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Angle of Detection: 110º vs 120°
$16.50
- + Angle of Detection: 120°
- - Rating: 4.0 vs 4.3
- - Integrations: Alexa, Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
What owners say
Owners of both sensors describe a fast, dependable Zigbee trigger, and then disagree about the light sensor. Sonoff SNZB-03P ZigBee Motion Sensor owners call it excellent value, pairing instantly with SmartThings, Hubitat or Home Assistant, with a light reading they only use for on-or-off automations, and they warn about a Home Assistant motion entity that can stick and occasional network drops. Sonoff SenseGuard Motion Gen2 owners single out the real lux measurement, a cooldown they can set from five to sixty seconds and clean Home Assistant recognition, while the recurring complaint is SmartThings: the current driver targets the older model and does not recognise this one. Both groups accept a short range and a required Zigbee hub.
Upgrading from the Sonoff SNZB-03P ZigBee Motion Sensor?
Moving from the Sonoff SNZB-03P ZigBee Motion Sensor to the Sonoff SenseGuard Motion Gen2 buys one thing: a proper lux sensor. The newer model reports real illuminance with months of history and an adjustable cooldown, where the older one only says dim or bright. What you give up is reach: the Gen2 drops Google Home, HomeKit and its Matter path and is still awaiting a working SmartThings driver, so it fits an Alexa or Home Assistant Zigbee network best. If you only need a fast on-and-off trigger, the older sensor is still the safer pick; if light levels should drive your automations and you run Home Assistant or Alexa, the Gen2 is the step up.
Frequently Asked Questions
Which is better overall: Sonoff SNZB-03P ZigBee Motion Sensor or Sonoff SenseGuard Motion Gen2?
For most Zigbee homes, the Sonoff SNZB-03P ZigBee Motion Sensor, because it reaches more platforms and is proven on SmartThings. The Sonoff SenseGuard Motion Gen2 is the better sensor when true lux readings matter, but it stays within Alexa and Home Assistant for now.
What is the biggest difference between the Sonoff SNZB-03P ZigBee Motion Sensor and the Sonoff SenseGuard Motion Gen2?
The light sensor and the platform list. The Sonoff SenseGuard Motion Gen2 measures real lux with history, while the older model reports only dim or bright, and the newer sensor lacks the Google Home, HomeKit and Matter support the Sonoff SNZB-03P ZigBee Motion Sensor carries through a Sonoff hub.
Do I need a hub for the Sonoff SNZB-03P ZigBee Motion Sensor or the Sonoff SenseGuard Motion Gen2?
Yes. Both are Zigbee devices with no Wi-Fi of their own, so each needs a coordinator such as a Sonoff hub, a Home Assistant setup with Zigbee2MQTT or ZHA, or an Echo with a built-in Zigbee radio. Neither includes a hub in the box.
Does the Sonoff SenseGuard Motion Gen2 work with SmartThings?
Not reliably yet. Sonoff advertises SmartThings compatibility, but owners report the available Edge driver still targets the older Sonoff SNZB-03P ZigBee Motion Sensor and does not recognise the Gen2. If SmartThings is your only hub, choose the older sensor.
How long does the battery last on each sensor?
Both are rated for about three years on a single CR2477 cell. The Sonoff SNZB-03P ZigBee Motion Sensor and the Sonoff SenseGuard Motion Gen2 share that long service life, which keeps maintenance low once a Zigbee hub is in place.
Who should buy the Sonoff SenseGuard Motion Gen2?
A Home Assistant or Alexa user who wants motion plus a genuine illuminance value and an adjustable cooldown, and does not need Google Home, HomeKit or a certified SmartThings path.
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