Introducció
The SONOFF SNZB-02D is a Zigbee-based indoor temperature and humidity sensor designed for real-time monitoring of environmental conditions. It features a large LCD display for direct readings and can integrate with smart home systems like Alexa, Google Home, and Home Assistant via a compatible Zigbee hub. This manual provides detailed instructions for setup, operation, and maintenance of your SNZB-02D sensor.

Image: Two SONOFF SNZB-02D sensors displayed with their orange packaging boxes, highlighting the product's appearance.
Què hi ha a la caixa
Verifiqueu que tots els components siguin presents en desembalar:
- SONOFF SNZB-02D Temperature Humidity Sensor
- Manual d'usuari (aquest document)
- Pila CR2450 (preinstal·lada o inclosa)
- 3M Adhesive (for mounting)
- Magnetic Base (for mounting)
Característiques del producte
- Monitorització en temps real: Displays temperature and humidity on a large LCD screen and via the eWeLink app.
- Alta precisió: Built-in Swiss-made sensor provides ±0.2°C/±0.4°F temperature accuracy and ±2%RH humidity accuracy.
- Freqüència d'actualització ràpida: Readings refresh every 5 seconds on the device display.
- Canvi d'unitat: Easily switch between Celsius (°C) and Fahrenheit (°F) on the device.
- Notificacions de l'aplicació: Receive instant alerts when temperature or humidity levels exceed preset thresholds.
- Emmagatzematge i exportació de dades: Up to half-year free cloud storage for historical data, with hourly viewing and export options.
- Integració d'escenes intel·ligents: Use sensor data as triggers for home automation routines.
- Àmplia compatibilitat: Works with Zigbee hubs, Alexa, Google Home, and Home Assistant (via eWeLink add-on).
- Instal·lació flexible: Features a built-in kickstand, magnetic back, and 3M adhesive for various mounting options.

Image: The SONOFF SNZB-02D sensor displayed on a wooden table, illustrating its compact design and clear LCD screen. Icons around it highlight features like accurate sensor, app monitoring, C/F switch, large display, 400ft coverage, and low battery notification.
Guia de configuració
1. Instal·lació de la bateria
The SNZB-02D sensor typically comes with a CR2450 battery pre-installed. If not, or if you need to replace it:
- Obriu suaument la coberta posterior del dispositiu.
- Insert the CR2450 battery, ensuring the positive (+) side faces upwards.
- Tanqueu la coberta posterior de manera segura.
2. Pairing with a Zigbee Hub
The SNZB-02D requires a Zigbee hub (e.g., SONOFF Zigbee Bridge, Alexa with built-in Zigbee Hub, Home Assistant with Zigbee dongle) to function with the eWeLink app and other smart home platforms.
- Ensure your Zigbee hub is powered on and in pairing mode. Refer to your hub's specific instructions for enabling pairing mode.
- On the SNZB-02D sensor, locate the pairing button (usually a small pinhole button on the back).
- Press and hold the pairing button for approximately 5-7 seconds until the network indicator on the LCD screen starts blinking, indicating it's in pairing mode.
- Once successfully paired, the network indicator will stop blinking and remain steady. The sensor will appear in your eWeLink app or connected smart home platform.
Note: If pairing difficulties occur, especially with Hubitat, some users report success by removing the battery for 10 seconds, starting pairing on the hub, then re-inserting the battery and holding the pairing button for 7-10 seconds until the icon blinks. If still unsuccessful, try pressing and releasing the reset button quickly every 2-3 seconds until the hub detects the device.

Image: A visual representation of the SONOFF SNZB-02D sensor wirelessly connecting to different Zigbee hubs, including Alexa with built-in Zigbee Hub, SONOFF ZBDongle-P/E, NSPanel Pro, and SONOFF Zigbee Bridge/Pro.
3. eWeLink App Integration
After pairing with your Zigbee hub, the sensor should automatically appear in your eWeLink app (if using a compatible SONOFF hub) or the app associated with your Zigbee gateway.
- Download the eWeLink app from the App Store or Google Play Store.
- Registra't o inicia la sessió al teu compte d'eWeLink.
- Ensure your Zigbee hub is added and online in the app.
- The SNZB-02D sensor should appear under your devices. You can rename it for easier identification.
4. Voice Assistant Integration (Alexa & Google Home)
To control or query the sensor using voice commands, ensure your Zigbee hub is linked to your Alexa or Google Home account.
- Obre l'aplicació Alexa o Google Home.
- Enable the "eWeLink Smart Home" skill (or the skill corresponding to your Zigbee hub).
- Link your eWeLink account (or hub account) with the voice assistant.
- Discover new devices. Your SNZB-02D sensor should now be controllable via voice commands (e.g., "Alexa, what's the temperature in the living room?").

Imatge: Il·lustracions que mostren la compatibilitat del SONOFF SNZB-02D amb Alexa i Google Home, incloent-hi ex.amples of voice commands and responses for temperature inquiries.
5. Home Assistant Integration
The SNZB-02D can be integrated with Home Assistant via a Zigbee dongle and the eWeLink add-on or other Zigbee integrations.
- Ensure your Home Assistant instance has a compatible Zigbee integration (e.g., ZHA, Zigbee2MQTT) set up with a Zigbee USB dongle.
- Follow the pairing steps for your specific Zigbee integration to add the SNZB-02D as a new device.
- Once added, the temperature and humidity entities from the sensor will appear in Home Assistant, allowing for automation and monitoring.

Image: A screenshot of the Home Assistant dashboard displaying temperature and humidity data from the SONOFF SNZB-02D sensor, demonstrating its integration capabilities.
Instruccions de funcionament
1. Reading the LCD Display
The large LCD screen dynamically displays the current temperature and humidity. The top number indicates temperature, and the bottom number indicates humidity. Icons for network status, battery level, and comfort level are also visible.

Imatge: Una imatge detallada view of the SONOFF SNZB-02D's LCD screen, emphasizing its large digits for easy readability of temperature and humidity. It also illustrates the 5-second fast refresh rate and the ability to switch between Celsius and Fahrenheit.
2. Switching Temperature Units (°C/°F)
To toggle between Celsius and Fahrenheit, double-tap the pairing button on the back of the device. The display will instantly switch units.
3. App Monitoring and Alerts
Through the eWeLink app (or your smart home app), you can view real-time temperature and humidity data remotely. You can also set custom thresholds for temperature and humidity. If the readings go above or below your set comfort levels, you will receive instant notifications on your smartphone.

Image: A smartphone screen showing an eWeLink app notification indicating that the current temperature has exceeded the comfort level, demonstrating the alert feature.
4. Emmagatzematge i exportació de dades
The sensor stores up to half a year of historical temperature and humidity data in the cloud. You can access this data via the eWeLink app to view hourly, daily, or monthly trends. The app also allows you to export this data for further analysis.

Image: Screenshots of the eWeLink app displaying historical temperature and humidity graphs over different periods (day, month, half-year), along with options for data export.
5. Smart Scene Automation
Leverage the sensor's data to create intelligent automation routines within your smart home system. For example, you can set a smart scene to automatically turn on a humidifier if the humidity drops below a certain percentage, or activate an air conditioner if the temperature rises too high.

Image: A woman working on a laptop with a humidifier in the foreground, demonstrating how the sensor's humidity data can trigger a smart scene to activate the humidifier for optimal comfort.
Instal·lació i col·locació
The SONOFF SNZB-02D offers versatile installation options to suit various environments:
- Suport de taula: Utilize the built-in kickstand to place the sensor on any flat surface, such as a desk, shelf, or nightstand.
- Enganxament magnètic: The sensor features a magnetic back, allowing it to be easily attached to metallic surfaces like refrigerators or magnetic boards.
- Adhesiu 3M: For non-metallic surfaces, use the provided 3M adhesive to securely mount the sensor to walls, cabinets, or other desired locations.

Image: A composite image illustrating the three primary mounting methods for the sensor: using its built-in stand on a table, magnetic attachment to a refrigerator, and adhesive mounting to a wooden surface.
Choose a location that provides accurate readings for the area you wish to monitor. Avoid placing the sensor near heat sources (e.g., direct sunlight, vents, appliances) or in areas with extreme drafts, as this can affect accuracy.
Manteniment
1. Substitució de la bateria
The sensor is powered by a CR2450 button cell battery. When the battery level is low, a low battery indicator will appear on the LCD screen and you may receive an alert in the eWeLink app. To replace the battery:
- Obriu suaument la coberta posterior del dispositiu.
- Traieu la bateria CR2450 antiga.
- Introduïu una pila CR2450 nova, assegurant-vos que el costat positiu (+) estigui mirant cap amunt.
- Tanqueu la coberta posterior de manera segura.
Typical battery life is approximately 16 months, but this can vary based on usage and environmental conditions.
2. Neteja
To maintain optimal performance and display clarity, clean the sensor periodically:
- Netegeu l'exterior del dispositiu amb un drap suau i sec.
- Do not use liquid cleaners, aerosols, or abrasive solvents, as these can damage the device.
- Ensure no moisture enters the device, especially around the sensor openings.
Resolució de problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Device not pairing with Zigbee hub. |
|
|
| Lectures de temperatura/humitat inexactes. |
|
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| Sensor frequently disconnects from the hub. |
|
|
| La pantalla LCD està en blanc o tènue. |
|
|
Especificacions
| Número de model | SNZB-02D |
| Dimensions del producte | 2.34 x 2.46 x 0.72 polzades (59.5 x 62.5 x 18.3 mm) |
| Pes de l'article | 0.01 unces (aprox. 0.28 grams) |
| Connectivitat sense fil | Zigbee 3.0 |
| Precisió de la temperatura | ± 0.2 ° C / ± 0.4 ° F. |
| Precisió de la humitat | ± 2% HR |
| Font d'alimentació | CR2450 button cell battery (included) |
| Tipus de muntatge | Tabletop, Magnetic, 3M Adhesive |
| Fabricant | SONOFF |
Informació de seguretat
- Mantingueu el dispositiu fora de l'abast dels nens i les mascotes.
- No exposeu el dispositiu a temperatures extremes, llum solar directa ni humitat elevada.
- Do not disassemble, modify, or attempt to repair the device yourself. This will void the warranty.
- Dispose of batteries properly according to local regulations. Do not incinerate batteries.
- Eviteu col·locar el dispositiu a prop de camps electromagnètics forts.
Garantia i Suport
Per obtenir informació sobre la garantia i assistència tècnica, consulteu la pàgina oficial de SONOFF. website or contact their customer service directly. You can also find additional resources and FAQs on their support pages.
Manual d'usuari oficial (PDF): Descarregar PDF
SONOFF Brand Store: Visita la botiga
Note: No relevant official product videos from the seller were found in the provided data to embed in this manual.





