Sonoff SNZB-02WD - Zigbee Temperature and Humidity Sensor IP65 with LCD Screen

Presentation

The all-terrain smart sensor that monitors your indoor and outdoor comfort.

The Sonoff SNZB-02WD marks a significant advancement in connected climate monitoring by offering the first truly versatile Zigbee sensor for both indoor and outdoor use. Protected by an IP65 certification with a waterproof breathable membrane, this sensor easily withstands humidity, fog, and harsh weather while providing UV resistance for installation in full sunlight. Its large 2.2-inch LCD screen displays temperature and humidity in real-time with intuitive icons that instantly indicate environmental conditions (too dry, comfortable, too humid). Equipped with the high-precision Swiss-made Sensirion SHT40 sensor, it ensures ultra-reliable measurements (±0.2°C for temperature, ±2% for relative humidity) updated every 5 seconds. Compatible with major home automation platforms via the Zigbee 3.0 protocol, it seamlessly integrates into your existing smart ecosystem to create advanced automations based on actual weather conditions. Powered by a CR2477 battery offering up to 2 years of autonomy, this completely wireless sensor can be mounted anywhere thanks to its multiple mounting systems.

Key functions

High-precision real-time climate monitoring The Sensirion SHT40 sensor, manufactured in Switzerland, delivers exceptionally precise measurements: ±0.2°C for temperature in the range of -10°C to +60°C, and ±2% relative humidity in the range of 0 to 99%. The automatic refresh every 5 seconds allows real-time monitoring of climate variations, essential for quickly reacting to changing conditions. Via the eWeLink app or your home automation platform, you can view detailed data history with semi-annual curve graphs, identify maximum and minimum values by hour or day, and export data as files for in-depth analysis. The free 6-month cloud storage retains your historical data with hourly accuracy to understand long-term trends.

Robust design for indoor and outdoor The IP65 certification combined with a special breathable and waterproof membrane allows the SNZB-02WD to function perfectly in humid, foggy, or weather-exposed environments. Install it without fear near a window, in your garden, under a pergola, in a horticultural greenhouse, or on a balcony. Its UV resistance ensures the durability of the casing and screen even in direct sunlight. The sensor maintains its performance even in cold environments, making it versatile for all your climate monitoring needs. Its LCD screen remains perfectly readable in all lighting conditions for immediate local consultation without needing to take out your smartphone.

Intelligent automations and personalized alerts Create sophisticated home automation scenarios based on sensor readings: automatically activate your dehumidifier when humidity exceeds a critical threshold, trigger ventilation when the temperature rises, open your smart blinds to naturally cool down, or turn on the heating when it's too cold. Configure personalized push alerts that instantly notify you on your smartphone when conditions fall outside your defined comfort zone. These notifications allow for quick intervention to protect your greenhouse plants, monitor the wine cellar, control the baby's room, or simply optimize your daily comfort. The eWeLink device-sharing feature enables the whole family to receive important notifications.

Ultra-simple installation and universal compatibility The SNZB-02WD is compatible with all Zigbee 3.0 gateways on the market: Sonoff ZBBridge Pro, NSPanel Pro, ZBDongle-P/E, as well as third-party systems like Jeedom, Home Assistant, Homey, Fibaro HC3, Amazon Echo with integrated Zigbee, and many others. Pairing is done in 5 seconds by simply pressing the dedicated button. Three mounting methods are included in the packaging: a powerful magnetic base for metal surfaces, premium 3M double-sided adhesive for walls and windows, or a hanging cord for free suspension. Its compact size (62.8 x 58.5 x 21.8 mm) and lightweight (66g including battery) allow for discreet installation wherever you need it.

Technical specifications

Reference and standards

• Model: Sonoff SNZB-02WD
• Protocol: Zigbee 3.0
• Certification: IP65 (dustproof and water jet resistant)
• Membrane: breathable and waterproof for operation in a humid environment
• Resistance: UV for outdoor use in direct sunlight

Sensor and precision

• Sensor: Sensirion SHT40 (Swiss made)
• Temperature range: -10°C to +60°C
• Temperature accuracy: ±0.2°C (±0.4°F)
• Relative humidity range: 0% to 99% RH
• Humidity accuracy: ±2% RH
• Refresh rate: 5 seconds

Screen and interface

• LCD screen: 2.2 inches high definition
• Display: temperature, humidity, battery status
• Intuitive icons: environmental conditions (too dry, comfortable, too humid)
• Zigbee signal indicator

Wireless connectivity

• Zigbee Standard: 3.0
• Theoretical range: up to 120 meters (400 feet) in open field.
• Actual indoor range: 25-30 meters depending on obstacles
• Recommended extension: Zigbee repeaters (outlets, powered bulbs)

Gateway and platform compatibility

• Sonoff: ZBBridge, ZBBridge Pro, NSPanel Pro, ZBDongle-P, ZBDongle-E, iHost
• Smart home boxes: Jeedom, Home Assistant (ZHA, Zigbee2MQTT), Homey, Fibaro HC3, eedomus
• Voice assistants: Amazon Alexa (Echo with Zigbee), Google Home, Apple HomeKit (via compatible gateway)
• Application: eWeLink (iOS/Android)

Software features

• Real-time monitoring via mobile application
• Data history with line charts
• Free cloud storage: 6 months of data with hourly precision
• Data export: file format for external analysis
• Displaying min/max values by hour/day/month/year
• Customizable push notifications (temperature/humidity thresholds)
• Smart scenes and automations
• Multi-user device sharing
• Voice commands (via Alexa, Google Home)

Food and autonomy

• Battery type: CR2477 (3V lithium button)
• Battery included: Yes
• Typical autonomy: up to 2 years depending on usage frequency
• Low battery indicator: icon on LCD screen

Dimensions and weight

• Dimensions: 62.8 x 58.5 x 21.8 mm
• Weight: approximately 66 grams (including battery)

Assembly and installation

• Pairing button: accessible on the back side (press for 5 seconds)
• Status LED: Zigbee signal indicator integrated into the screen
• Fixation methods:
  • Powerful magnetic base (included)
  • 3M double-sided adhesive (included)
  • Suspension cord (included)
• Standby mode: remove battery protection tab

Package contents

• Sonoff SNZB-02WD Sensor
• Pre-installed CR2477 battery
• Magnetic base
• 3M double-sided adhesive
• Suspension cord
• Reset pin
• Multilingual user manual (including French)
• Quick Start Guide

Terms of Use

• Operating temperature: -10°C to +60°C
• Operating humidity: 0% to 99% RH (without condensation due to membrane)
• Usage: indoor and outdoor (IP65 protected)
• Compatible environments: houses, apartments, gardens, greenhouses, balconies, terraces, garages, basements

Reset

• Short press (5 seconds): pairing mode (LED flashes, duration 180 seconds)
• Long press (10 seconds): factory reset