SONOFF SNZB-02D Temperature and Humidity Sensor with Screen

Its large 2.8-inch LCD screen displays temperature and humidity in real time, with intuitive icons indicating comfort status and battery level at a glance. Equipped with a Swiss-made sensor that refreshes every 5 seconds, it offers an accuracy of ±0.2°C and ±2%RH for near-instant monitoring: this is the dual local and remote readability offered by the SNZB-02D. A compatible Zigbee 3.0 hub is required.

Customizable push alerts, six months of cloud history, and data export

As soon as a comfort threshold is exceeded, a push notification is sent instantly to your smartphone, whether for a room that is too humid, a greenhouse that is too hot, or a sensitive storage area. Readings can be viewed at any time in the eWeLink application thanks to detailed graphs by hour, day, week, month, or semester. The history is kept for six months and can be exported in CSV format for further analysis. Zigbee communication can reach up to 120 meters in open field depending on the installation environment. industrial data of the SNZB-02D exportable in file format for in-depth analysis.

Compatibility and home automation integration

Compatible with SONOFF iHost, NSPanel Pro, ZBBridge-P and ZBBridge-U hubs, the SNZB-02D also integrates with Home Assistant via ZHA or Zigbee2MQTT when paired with a compatible coordinator such as the SONOFF ZBDongle-P or ZBDongle-E. Temperature and humidity measurements can then be used in Alexa, Google Home, SmartThings or Home Assistant to automatically trigger a heater, fan or dehumidifier depending on the detected conditions.

CR2450 battery, compact casing and extended measuring range

Powered by a 3V CR2450 battery, the SNZB-02D operates from -9.9°C to +60°C in a 59.5 × 62.5 × 18.5 mm PC+LCD casing weighing 69.5 grams, discreet on any surface. The battery level is continuously visible on the screen and in the application, with an integrated alert before the level becomes critical to never interrupt monitoring.

FAQ

What is the difference between the SNZB-02D and the SNZB-02P?

The SNZB-02D has a large 2.8-inch LCD screen displaying readings directly on the device, and uses a CR2450 battery. The SNZB-02P has no screen and uses a CR2477 battery offering up to four years of autonomy. Both share the same measurement accuracy and Zigbee 3.0 connectivity.

Does the six months of history require a paid subscription?

No, the six-month cloud storage is included free of charge in the eWeLink application. Data export in file format is also available free of charge from the application interface.

Can the SNZB-02D be used in a greenhouse or unheated space?

Yes, its operating range of -9.9°C to +60°C and its tolerance up to 95% RH make it suitable for a greenhouse, cellar or garage. Below -9.9°C, the performance of the sensor and battery is not guaranteed by the manufacturer.

Is the SONOFF SNZB-02D compatible with Home Assistant?

Yes. The SNZB-02D can be integrated with Home Assistant via ZHA or Zigbee2MQTT when paired with a compatible Zigbee coordinator such as the SONOFF ZBDongle-P or ZBDongle-E. Temperature and humidity readings can then be used in dashboards, alerts, and local automations.

Specifications