SONOFF SNZB-02D Zigbee Temperature & Humidity Sensor with Display

Temperature and humidity always visible at a glance - even without a phone.

Do you want to quickly check the temperature in the bedroom, nursery, or wine cellar without having to grab your phone? The SONOFF SNZB-02D Zigbee climate sensor features a clear 2.8″ LCD display that shows temperature, humidity, and battery status in real-time. Place it on your desk, hang it on the wall, or magnetically attach it to any metal surface for instant readability.

🌡️ High accuracy, Sensirion sensor chip

The SNZB-02D is equipped with a Sensirion sensor chip, from the same Swiss manufacturer renowned for precision sensors. The measurement accuracy is:

• Temperature: ±0.2°C / ±0.4°F, measurement range -9.9°C to +60°C
• Humidity: ±2% RH, measurement range 5-95% RH
• Resolution: 0.1°C / 0.1% RH

The sensor automatically sends an update as soon as the temperature changes by ≥0.2°C or the humidity by ≥5%. This ensures you always have up-to-date data in the app and on the screen.

🖥️ Smart display with comfort indicator

The LCD display not only shows the measured values but also a comfort indicator. The sensor automatically indicates whether the climate in the room is comfortable:

These threshold values can be fully customized via the eWeLink app. With a double press of the button, you can easily switch between °C and °F.

🔔 App monitoring, push notifications, and historical data

• Real-time monitoring of temperature and humidity directly in the eWeLink app
• Push notifications when user-defined thresholds are exceeded
• Historical graphs by day, month, or half-year, exportable for your own analysis
• Voice control via Alexa or Google Home

🔗 Broadly compatible with popular smart home platforms

• SONOFF's own hubs: ZBBridge, ZBBridge-P, ZBBridge-U, NSPanel Pro, iHost, ZBDongle-P, ZBDongle-E
• Amazon: Echo Plus 2nd Gen, Echo Show 2nd Gen, Echo 4th Gen
• Home Assistant: via Zigbee2MQTT or ZHA
• Other gateways that support Zigbee 3.0

🏠 Local scenes, even without internet

The SNZB-02D supports local Zigbee scenes. Automations remain active even if your WiFi or internet goes down.

🧲 Three mounting options

• Fold-out desk stand, directly on the desk or windowsill
• Magnetic base, attach it to any metal surface
• 3M adhesive base, for fixed wall mounting up to a maximum height of 2 meters

💡 Example automations

• Wine cellar 🍷: notification if temperature rises above 16°C or humidity above 70% RH
• Nursery 👶: heating turns on if it gets colder than 19°C
• Greenhouse or conservatory 🌿: mister activates if humidity is too low
• Bathroom 💧: fan turns on if humidity is above 65% RH
• Energy saving 🏠: thermostat to eco-mode if a window is open, combined with SNZB-04P

📦 Technical Specifications

⚠️ Important note

The SNZB-02D has a shorter battery life (± 2 years) than the display-less SNZB-02P (>4 years) because the LCD screen consumes extra power. Use a CR2450 battery as a replacement; this is a different size than the CR2477 in other SONOFF sensors. CR2450 batteries are easily available at supermarkets or online.

🔄 SNZB-02D vs. SNZB-02P - which do you choose?

❓ Frequently Asked Questions (FAQ)

Do I need a hub?

Yes, a compatible Zigbee hub is required: SONOFF ZBDongle-E, NSPanel Pro, or iHost.

Is the battery included?

Yes. Pull out the insulation strip and the sensor is immediately active.

How do I switch from °C to °F?

Double-press the button on the back of the display.

How do I set the comfort thresholds?

All thresholds can be customized via the eWeLink app.

Does it work with Home Assistant?

Yes, via Zigbee2MQTT or ZHA.

What's the difference from the SNZB-02P?

The SNZB-02D has a 2.8″ LCD display and lasts ±2 years. The SNZB-02P has no display but lasts more than 4 years. Choose the 02D for direct readability, the 02P for maximum battery life.

How do I replace the battery?

Unscrew the bottom, lift off the cover, and replace the CR2450 battery.

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