# SONOFF SNZB-02M

*SONOFF / SNZB-02M*

> The SNZB-02M (AirGuard TH Pressure) needs a Zigbee 3.0 hub or coordinator. It reports temperature, humidity and air pressure, and runs for over 2 years on a CR2477 battery. It suits HomeKit users through an integration (a Matter bridge). Google Home, Alexa and Home Assistant users reach it through an integration (Zigbee).

- Canonical page: https://smarthomecanon.com/devices/sonoff-snzb-02m
- Last checked: 2026-10-13

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [SONOFF](https://smarthomecanon.com/brands/sonoff) |
| Category | Temperature and humidity sensor |
| Model numbers | SNZB-02M |
| Status | Current[^1] |
| Type | Temperature and humidity[^1] |
| Power | CR2477 battery[^1] |
| Radio | Zigbee 3.0[^1] |
| In Zigbee2MQTT docs | Yes[^2] |

## Integration paths

**How the SONOFF SNZB-02M connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Matter via Bridge](https://smarthomecanon.com/protocols/matter-bridged) | A SONOFF Matter bridge, such as the Zigbee Bridge Ultra[^3] | unknown | unknown |
| [Zigbee](https://smarthomecanon.com/protocols/zigbee) | A Zigbee 3.0 hub or coordinator[^1] | unknown | unknown |

**Platform support for the SONOFF SNZB-02M**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Matter via Bridge | [HomeKit](https://smarthomecanon.com/platforms/homekit) | Via integration[^3] |  |
| Zigbee | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Via integration[^1] |  |
| Zigbee | [Google Home](https://smarthomecanon.com/platforms/google-home) | Via integration[^1] |  |
| Zigbee | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | Via integration[^1] | ZHA (needs a script) |

## Related pages

- [SONOFF sensors and buttons](https://smarthomecanon.com/lines/sonoff-zigbee-sensors) (line)
- [SONOFF](https://smarthomecanon.com/brands/sonoff) (brand)
- [Matter through a bridge](https://smarthomecanon.com/protocols/matter-bridged) (protocol)
- [Zigbee](https://smarthomecanon.com/protocols/zigbee) (protocol)
- [HomeKit](https://smarthomecanon.com/platforms/homekit) (platform)
- [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) (platform)
- [Google Home](https://smarthomecanon.com/platforms/google-home) (platform)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)

## Sources

[^1]: SONOFF store: SONOFF AirGuard TH Pressure Zigbee Temperature Humidity Air Pressure Sensor | SNZB-02M. https://sonoff.tech/products/sonoff-airguard-th-pressure-zigbee-temperature-humidity-air-pressure-sensor-snzb-02m (manufacturer, checked 2026-10-10)
[^2]: Zigbee2MQTT: SONOFF SNZB-02M. https://www.zigbee2mqtt.io/devices/SNZB-02M.html (platform documentation, checked 2026-10-10)
[^3]: SONOFF Zigbee Bridge Ultra. https://sonoff.tech/products/sonoff-zigbee-bridge-ultra (manufacturer, checked 2026-10-13)