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

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

Want to quickly check the temperature in the bedroom, nursery, or wine cellar – without reaching for your phone? The SONOFF SNZB-02D Zigbee climate sensor features a bright 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 – always instantly readable.

🌡️ High accuracy, Sensirion sensor chip

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

• >

Temperature:

• ±0.2°C / ±0.4°F, range -9.9°C to +60°C >

Humidity:

• ±2% RH, 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 & historical data

• >

Real-time monitoring

• of temperature and humidity >

Push notifications

• when set values are exceeded >

Historical graphs

• per day, month, or half-year – exportable >

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 >All 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 a desk or windowsill >

Magnetic base

• – attach it to any metal surface >

3M adhesive base

• – for fixed wall mounting (≤ 2 meters height)

💡 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 switches to eco-mode if a window is open (combined with SNZB-04P).

📦 Technical Specifications

⚠️ Point of attention

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 readily 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 insulating 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 threshold values?
All threshold values can be customized via the eWeLink app.

Does it work with Home Assistant?
Yes, via Zigbee2MQTT or ZHA.

What is the difference with the SNZB-02P?
The SNZB-02D has a 2.8″ LCD display and lasts ±2 years. The SNZB-02P has no display but lasts >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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