1. Introducció
The SONOFF SNZB-02WD is an advanced Zigbee LCD smart temperature and humidity sensor designed for accurate environmental monitoring in various settings. Its robust IP65-rated waterproof housing ensures reliable performance even in challenging conditions. Featuring a clear 2.2-inch LCD display, it provides real-time temperature and humidity readings and integrates seamlessly with Zigbee 3.0 hubs and open-source platforms for comprehensive smart home automation.

Image: SONOFF SNZB-02WD sensor highlighting key features.
2. Característiques
- Classificació impermeable IP65: Ensures stable performance in humid or misty environments.
- Pantalla LCD de 2.2 polzades: Clear and easy-to-read real-time temperature and humidity.
- Monitorització en temps real: Provides accurate temperature (±0.2℃) and humidity (±2% RH) readings.
- Freqüència d'actualització ràpida: Updates data every 5 seconds.
- Dades històriques: View and export data for up to 180 days via the eWeLink app.
- Wide Working Temperature Range: Capable of measuring from -20℃ to 60℃.
- UV-Resistant Durable Housing: Withstands direct sunlight for long-term outdoor use.
- Durada de la bateria de llarga durada: Designed for up to 2 years of operation with low power consumption.
- Protocol Zigbee 3.0: Compatible with various Zigbee hubs.
- Automatització d'escenes intel·ligents: Create rules and receive notifications based on environmental changes via the eWeLink app.
- Control de veu: Query temperature using Alexa or Google Home (requires compatible hub).
- Interruptor °C/°F: Easily switch between Celsius and Fahrenheit display.

Image: Visual representation of the sensor's main features.
3. Contingut del paquet
Assegureu-vos que tots els elements estiguin presents al vostre paquet:
- Zigbee LCD Smart Thermometer (SNZB-02WD) x 1 (CR2477 Battery included)
- Hanging rope x 1
- Card pin x 1
- Guia ràpida x 1

Image: Contents of the SNZB-02WD package.
4. Especificacions
| Atribut | Valor |
|---|---|
| Número de model | SNZB-02WD |
| Classificació IP | IP65 |
| Model de bateria | CR2477 |
| CasinMaterials | PC+ABS |
| Color | Blanc |
| Connexió sense fil | Zigbee 3.0 |
| Temperatura de treball | -20 ℃ ~ 60 ℃ |
| Humitat de treball | 0-100% HR |
| Entrada | 3V |
| Compatibilitat | All Compatible (Requires Zigbee Hub) |
| Certificació | CE, FCC, RoHS |
| Dimensions | 62.8 mm (2.47 polzades) x 58.5 mm (2.30 polzades) x 21.8 mm (0.86 polzades) |

Image: Technical specifications and dimensions of the sensor.
5. Configuració
To set up your SONOFF SNZB-02WD sensor, follow these steps:
- Descarrega l'aplicació eWeLink: Cerca "eWeLink" in your smartphone's app store (Google Play Store for Android or Apple App Store for iOS) and download the application.
- Escaneja el codi QR: Open the eWeLink app and use the in-app scanner to scan the QR code located on the device or its packaging.
- Select "Add Device": Within the eWeLink app, navigate to the device addition interface and select the option to "Add Device".
- Connect to Zigbee Hub: Choose your compatible Zigbee hub from the list in the app and wait for the sensor to connect. Ensure your Zigbee hub is powered on and within range.
*Note: A compatible Zigbee hub is required for the sensor to function. Please ensure your Zigbee Hub has been upgraded to the latest firmware before adding devices to use all functions.

Image: Step-by-step setup guide for the sensor.
6. Instal·lació
The SNZB-02WD offers flexible installation options:
- Esquena magnètica: The sensor features a magnetic back, allowing it to be easily attached to metallic surfaces like refrigerators.
- Corda per penjar: Use the included hanging rope to suspend the sensor in desired locations, such as on a towel rack or hook.

Image: Various installation methods for the sensor.
7. Instruccions de funcionament
7.1 Monitorització en temps real
Once connected to your Zigbee hub, the SNZB-02WD will continuously monitor temperature and humidity. You can view these real-time readings directly on the device's 2.2-inch LCD screen or through the eWeLink app on your smartphone.

Image: Sensor in various monitoring environments.
7.2 Historical Data Access
The eWeLink app stores historical temperature and humidity data for up to 180 days. You can access and review this data by day, month, or over the past half-year. This feature is useful for tracking environmental trends and making informed decisions, especially for applications like plant cultivation.

Image: eWeLink app displaying historical data.
7.3 Escenes intel·ligents i automatització
Leverage the eWeLink app to create smart scenes and automate actions based on temperature and humidity changes:
- Temperature Reminders: Set up notifications to receive alerts on your phone if the temperature drops below or rises above a certain threshold (e.g., for a reptile tank).
- Humidity Automation: Configure automation rules to trigger other smart devices. For example, if humidity drops below a set level, activate a smart water valve for irrigation.

Image: Smart scene examples in the eWeLink app.
7.4 Control de veu
If your Zigbee hub is compatible with voice assistants like Alexa or Google Home, you can query the current temperature using simple voice commands.

Image: Voice query for temperature.
7.5 Interruptor de la unitat de temperatura
The device supports switching between Celsius (°C) and Fahrenheit (°F) display. Refer to the quick guide for instructions on how to change the unit.
8. Manteniment
- Neteja: Netegeu el dispositiu amb un drap suau i sec. No utilitzeu productes químics agressius ni netejadors abrasius.
- Substitució de la bateria: The SNZB-02WD uses a CR2477 battery. When the battery level is low, the device will indicate this on its LCD screen and/or through the eWeLink app. To replace the battery, carefully open the device using the card pin or a similar tool, remove the old battery, and insert a new CR2477 battery with the correct polarity.
- Actualitzacions de firmware: Regularly check the eWeLink app for firmware updates for both the sensor and your Zigbee hub to ensure optimal performance and access to new features.
9. Solució De Problemes
- El dispositiu no es connecta:
- Ensure your Zigbee hub is powered on and within range of the sensor.
- Check if the Zigbee hub's firmware is up to date.
- Verify the sensor's battery is not depleted.
- Try resetting the sensor and re-pairing it with the hub.
- Lectures inexactes:
- Ensure the sensor is not placed in direct sunlight or near heat sources/vents, which can affect readings.
- Avoid placing the sensor in areas with extreme drafts or stagaire principal.
- Allow some time for the sensor to stabilize after initial placement or battery replacement.
- No Historical Data in App:
- Confirm the sensor is actively connected to the eWeLink app via your Zigbee hub.
- Check your app's settings to ensure data logging is enabled.
- El control per veu no funciona:
- Ensure your Zigbee hub is properly linked to your Alexa or Google Home account.
- Verify the sensor is recognized by your voice assistant.
10. Consells d'usuari
- For outdoor use, consider placing the sensor in a shaded area to prevent direct sunlight from affecting temperature readings, even though it's UV-resistant.
- When monitoring humidity in high-humidity environments (like bathrooms), ensure proper ventilation to get accurate readings relevant to the overall room condition.
- Utilize the historical data feature in the eWeLink app to identify patterns in temperature and humidity, which can be very helpful for plant care or maintaining optimal living conditions.
- Regularly check the battery status in the eWeLink app to avoid unexpected disconnections.
11. Compatibilitat
The SONOFF SNZB-02WD sensor requires a Zigbee 3.0 compatible hub to function. It supports a wide range of hubs and platforms:
| Tipus de concentrador | Compatible Hubs/Platforms | Temp. Monitoring | Hum. Monitoring | Historical Charts | Temp./Hum. Calibration | Actualitzacions OTA |
|---|---|---|---|---|---|---|
| SONOFF Hub | Zigbee Bridge Pro, Zigbee Bridge Ultra, NSPanel Pro, iHost | ✓ | ✓ | ✓ | ✓ | ✓ |
| ZB Bridge | ✓ | ✓ | ✗ | ✗ | ✗ | |
| Amazon Hub | Echo Show 2nd Gen, Echo Plus 2nd, Echo 4th Gen | ✓ | ✗ | ✗ | ✗ | ✗ |
| Open-Source Platforms | Home Assistant (via SONOFF ZBDongle series), Zigbee2MQTT | ✓ | ✓ | ✓ | ✓ | ✓ |
*Please make sure the Zigbee Hub has been upgraded to the latest firmware before adding devices to use all functions.

Image: Zigbee Hub Compatibility chart.
12. Garantia i Suport
For warranty information, technical support, and further assistance, please refer to the official SONOFF weblloc web o contacteu directament amb el servei d'atenció al client. Conserveu el rebut de compra per a reclamacions de garantia.





