Introduction

Zigbee LCD Smart Thermometer

User Manual V1.0

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.

App Monitoring

Push Notification

Reading Switch

Data Store
& Export

UV-Resistant
Casing

IP65 Protection
Rating

① Signal icon

• Flashes slowly: Device is in pairing mode. (Pairing time 180s）
• Keeps on: Pairing successful
• Keeps off: Pairing failed

② Lanyard hole

③ Battery

④ Current temperature/humidity

⑤ Button

（Visible after removing the device’s battery cover）
• Press and hold for 5 seconds: The device enters pairing mode and restores factory settings.
• Double-press: Switch temperature unit ℃/℉ (Factory default is ℃)

Specification
Model

SNZB-02WD

MCU
TLSR8656F512ET32
Input

3V⎓

Battery model

 

CR2477

Wireless connection

Zigbee 3.0 (IEEE802.15.4)

LCD dimension

2.2”

Net weight

65.6g

Color

White

Product dimension

62.8×58.5×21.8mm

IP rating

IP65

Casing material

PC+ABS

Applicable place

Indoor

Working temperature

-20℃~60℃/-4°F~140°F

Working humidity

0~100%RH

Temperature tolerance

±0.2℃/±0.36°F

Humidity tolerance

±2%RH

Working height

Less than 2000m

Certification

CE/FCC/ISED/RoHS

IC

 29127-SNZB02L

FCC ID

2APN5SNZB02L

⚠︎ It is suitable for safe use only when the altitude is below 2000m. Security risks may arise when the altitude is above 2000m.

IP65 Protection Rating Description:

⚠︎  This product’s protection rating is suitable for standard splash-proof scenarios. Avoid submerging the main unit or exposing it to high-pressure water jets.

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.

In an environment close to extremely low temperatures (e.g., -20℃/-4℉), the device may experience the following issues:
① Increased temperature measurement deviation up to ±0.7℃/±1.3℉. ② Significant reduction in battery capacity. ③ Screen refresh may show ghosting effects.

When the ambient temperature rises, the above phenomena will improve, but please note that due to the characteristics of the battery, the battery capacity may not be fully restored.

Add a Device
Download the eWeLink App & Add SONOFF Zigbee Gateway

Please download the “eWeLink” App from Google Play Store or Apple App Store.

Power on the device

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 is in a “slow flashing state”.

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 is in a “slow flashing state”.

Scan QR code to add the device

Enter “Scan QR code”

Scan the QR code of the device

Select “Add Device”

Long press the pairing button for 5 seconds.

The Signal icon flashes slowly for 180s.

Select Zigbee gateway.

Wait until the addition is done.

Matched Gateways

SONOFF ZBBridge, ZBBridge-P, ZBBridge-U, NSPanel PRO, iHost,  ZBDongle-P, ZBDongle-E

Third-party compatible gateway models:
Amazon Gateway Model:Echo Plus 2nd,Echo 4th Gen,Echo Show 2nd (In the Amazon gateway,only temperature queries are supported; humidity queries are not available.)

Other gateways supporting ZigBee3.0 wireless protocol.Detailed information is in accordance with the final product.

 

Effective Communication Distance Verification

Place the device in your desired place and press the device’s pairing button, then the signal icon on the screen keeps on, which means the device and the device (router device or gateway) under the same Zigbee network are in the effective communication distance.

Installation
Usage

Magnetic suction to the metal surface.

Thread the lanyard through the device hole and hang the device.

⚠︎  The equipment is only suitable for mounting at heights ≤ 2m.

Replace the Battery

Use a coin to twist and remove the battery cover.

Remove the battery cover before replacing the battery.

Factory Reset

In the eWeLink App, select “Delete Device,” or use a card pin to press and hold the device button for 5 seconds to restore factory settings.