Product Overview
Introduction
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Product Name |
Zigbee LCD Smart Thermometer |
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Product Model |
SNZB-02WD is a waterproof Zigbee smart temperature and humidity sensor. It detects the surrounding temperature and humidity, displaying real-time data on the LCD high-definition screen. When paired with a Zigbee gateway, users can monitor temperature and humidity changes via the app or set up smart scenes with other devices to achieve home automation.
Highlights
- 2.2″ LCD Screen Display: Easily monitor temperature and humidity on the clear LCD screen
- Unique Waterproof Structure Design: SNZB-02WD is housed in an IP65-rated casing, featuring an internal waterproof, breathable membrane, ensuring reliable performance even in humid or misty environments.
- Accurate Measurement: With ±0.2℃ accuracy for temperature and ±2% RH for humidity, you can trust the stability and accuracy of real-time readings.
- IP65 Waterproof Rating: Ensures stable performance even in humid, splash-prone environments.
- Zigbee 3.0 Compatible: Supports Zigbee hubs using the Zigbee 3.0 protocol, like SONOFF iHost, NSPanel Pro, ZBBridge-P, ZBBridge-U, ZBDongle-E, ZBDongle-P.
Applications
- Detect indoor temperature and humidity, such as in rooms, bathrooms, underground warehouses, etc.
- Monitor the garden or greenhouse and record daily temperature and humidity data;
- Create smart scenes to turn on the heater when the temperature is below 5℃.
Specification
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Model |
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MCU |
TLSR8656F512ET32 |
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Input Voltage |
3 V (CR2477 coin cell) |
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Wireless Protocol |
Zigbee 3.0 (IEEE 802.15.4) |
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LCD |
2.2″ HD screen |
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Net Weight |
65.6 g |
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Dimensions |
62.8 × 58.5 × 21.8 mm |
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Casing Material |
PC + ABS |
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Color |
White |
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IP Rating |
IP65 |
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Operating Temperature |
‑20 °C to 60 °C (‑4 °F to 140 °F) |
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Operating Humidity |
0–100 % RH |
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Temperature Accuracy |
±0.2 °C (±0.36 °F) |
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Humidity Accuracy |
±2 % RH |
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Operating Altitude |
≤ 2000 m |
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Certification |
CE / FCC / ISED / RoHS |
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IC |
29127‑SNZB02L |
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FCC ID |
2APN5SNZB02L |
Key Features
eWeLink Platform
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Notice: This functionality is available only when the device is paired with the eWeLink app. For capabilities when the device is paired via Matter with Alexa, Google Home, or other platforms, refer to Key Features >> Compatible Zigbee Hubs List |
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Device Home Page Functions |
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Key Features |
Feature Description |
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Current Temp & Humidity |
Real‑time display on the device screen and in the eWeLink App. |
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Historical Chart |
Hourly logs; view by a day, 7 days, month, and half‑year; supports CSV export. |
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Battery level |
The current battery level of the device. |
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Device Settings |
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Key Features |
Feature Description |
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Third-party Platforms |
Alexa |
Temp. query |
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Google Home |
Temp.& Hum. query |
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SmartThings |
Temp.& Hum. query; Battery Level query |
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Alice |
Temp.& Hum. query |
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IFTTT |
Temp. & Hum. trigger |
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Temperature Unit |
Switch the temperature unit, and both the device display and the app will update accordingly:
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Calibration |
The temperature and humidity readings of the device can be adjusted for calibration. Calibratable ranges:
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Report Configuration |
Adjust the Temp. & Hum. reporting threshold or interval to change the data update frequency in the app. |
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Notice: The Third-party Platforms methods apply after adding the device to the eWeLink APP, linking accounts, and syncing the device to third-party platforms via cloud-to-cloud integration. This does not involve a direct connection to third-party gateways. |
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Smart Scene |
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Trigger Type |
Description |
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Temperature |
Trigger when the temp exceeds the threshold. |
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Humidity |
Trigger when humidity exceeds the threshold. |
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False‑Alarm Prevention |
Delay to reduce false triggers. |
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Device Offline |
Triggered when the device goes offline. |
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Execution Action |
Description |
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*SNZB-02WD does not support being the smart scene execution device |
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Compatible Zigbee Hubs List
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Platform |
eWeLink |
Home Assistant via ZHA |
Home Assistant via Z2M |
Alexa |
SmartThings |
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Zigbee Hub |
ZBBridge |
ZBBridge-P ZBBridge-U, NSPanel Pro, iHost |
ZBDongle-P/-E |
ZBDongle-P/-E |
Amazon Echo (Plus 2nd, Echo 4th, Show 2nd) |
Samsung SmartThings Hub V3 / Aeotec V3 |
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Temperature |
√ |
√ |
√ |
√ |
√ |
√ |
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Humidity |
√ |
√ |
√ |
√ |
× |
√ |
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Temperature Calibration |
× |
√ |
√ |
√ |
× |
√ |
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Battery |
√ |
√ |
√ |
√ |
× |
√ |
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History Records |
√ |
√ |
√ |
√ |
× |
× |
|
OTA |
× |
√ |
√ |
√ |
× |
× |
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Scene |
√ |
√ |
√ |
√ |
√ |
√ |
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Notice:
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Installation and Configuration Guide
① Signal icon
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Signal icon |
Description |
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Flashes slowly |
Device is in pairing mode. |
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Keeps on |
Pairing successful |
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Keeps off |
Pairing failed |
② Lanyard hole
③ Battery
④ Current temperature/humidity
⑤ Button
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Button |
Description |
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Press & hold 5 seconds |
The device enters pairing mode and restores factory settings. |
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Double-press |
Switch temperature unit ℃/℉ (Factory default is ℃) |
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Single-press |
Detection communication distance |
Power On the Device
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Notice: If the device is not paired within 3 minutes, it will exit pairing mode. To re-enter pairing mode, use a card pin to press and hold the device button for 5 seconds until the signal icon |
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Use a coin to twist and remove the battery cover. |
Take out the battery insulation sheet to power on the device. |
When the device is used for the first time, it will enter pairing mode by default after being powered on, and the signal icon |
Add Device
eWeLink Platform
Open eWeLink to scan the QR code on the Quick Guide or the device itself to add the device.
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Enter "Scan" |
Enter "Scan" |
Select "Add Device" |
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Long press the pairing button for 5 seconds |
The Signal icon flashes slowly for 180s |
Select Zigbee gateway |
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Wait until the addition is done |
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Compatible Third-party Platform
If you're using a third-party Zigbee gateway, please refer to the corresponding app for detailed instructions on how to add the device.
Usage
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Magnetic suction to the metal surface. |
Thread the lanyard through the device hole and hang the device. |
FAQ
- What type of battery does the SNZB-02WD use, and how long does it last?
The SNZB-02WD comes with a pre-installed CR2477 battery. Simply remove the insulation tab to activate it. Under default report configuration settings, the battery life is estimated to be over two years. - How often does the SNZB-02P update data in the app?
When the SNZB-02P detects a temperature or humidity change exceeding the configured threshold, it will immediately update the data in the app. If no threshold is triggered, it will update at least once every hour. You can customize the thresholds and maximum reporting interval in the Report Configuration section of the eWeLink app. - Why is the data on the device screen different from what's shown in the app?
This could be due to a network delay, preventing the app from displaying the most recent data. Alternatively, if the temperature or humidity hasn't exceeded the reporting threshold, the app may not have refreshed with the latest data yet. - What level of protection does IP65 waterproofing provide?
The IP65 waterproof conditions are as follows:
① Using a standard 6.3mm inner diameter test nozzle with a flow rate of 12.5 liters per minute, water is sprayed onto the casing from all feasible directions.
② Actual water jet size: Approximately 40mm in diameter at a distance of 2.5 meters from the nozzle.
③ Each square meter of the casing's surface area may be sprayed for 1 minute, with a minimum test duration of 3 minutes.
Troubleshooting
- The Zigbee signal is unstable and the device frequently goes offline?
If your device often goes offline, it could be due to the long distance between the device and the gateway (we recommend no more than 50 meters through walls), or obstacles/interference blocking the signal. Try adjusting the placement of your device and gateway, or use additional Zigbee router devices to strengthen your Zigbee network coverage. - Missing features after pairing with the eWeLink app?
Please ensure both your Zigbee gateway and the eWeLink app are updated to the latest version. If the device was added using an outdated gateway firmware, remove the device, update the Zigbee gateway, and then re-add the device. - Device not working properly in low-temperature environments?
In environments approaching extremely low temperatures (e.g., -20℃ / -4℉), the device may encounter:
① Greater deviation in temperature readings (up to ±0.7℃ / ±1.3℉)
② Significant battery capacity drop
③ Ghosting on the screen during refresh
These effects will improve as the ambient temperature rises. However, please note that due to battery characteristics, the battery capacity may not fully recover.
Application Explore
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Desktop Stand |
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Specially designed for the SNZB-02WD, this 3D-printed desktop stand offers greater flexibility and stability for sensor placement. Ideal for use on desks, workspaces, bedside tables, and other indoor scenarios. |
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Access Link: Desktop Stand |
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Bathroom Mount |
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This 3D-printed bathroom mount is specially designed for the SNZB-02WD, catering to flexible installation needs in high-humidity environments. It features a standard suction cup slot on top, compatible with common suction cups on the market, allowing secure installation on smooth surfaces such as tiles, glass, and mirrors—no drilling required. *Need to prepare a suction cup, the neck diameter is 5mm, the neck height is 1.8mm. |
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Access Link: Bathroom Mount |
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Pegboard Mount |
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This 3D-printed mount is specially designed for the SONOFF SNZB-02WD temperature and humidity sensor. It fits standard pegboards, allowing the sensor to be easily hung on tool walls or equipment boards. |
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Access Link: Pegboard Mount |
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SWV Smart Water Valve Mount |
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This 3D-printed mount is specially designed for integrated installation with the SNZB-02WD sensor and SWV smart water valve. It is ideal for balcony, garden, and other automated irrigation or water leakage monitoring scenarios, allowing you to irrigate while simultaneously monitoring the ambient temperature and humidity. |
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Access Link: SWV Smart Water Valve Mount |
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SNZB-02WD 1:1 Scale Replica Model |
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This is a 1:1 scale replica model of the SONOFF SNZB-02WD smart temperature and humidity sensor. The model accurately reproduces:
It’s designed to help users verify physical dimensions before purchasing or installing the actual sensor, and to support the development of custom accessories and mounts. The model does not include internal features, buttons and battery — it is a shell-only mockup purely for size and fit evaluation. |
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Access Link: SNZB-02WD 1:1 Scale Replica Model |
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Know more
For a detailed guide and review of the SONOFF SNZB-02WD, visit our free course at the SONOFF Academy.