Temperature and Humidity Sensor Sonoff SNZB-02WD with LCD Display ZigBee

The Sonoff SNZB-02WD is a ZigBee temperature and humidity sensor with a built-in 2.2-inch LCD display that shows real-time ambient measurements. It uses the Zigbee 3.0 protocol for compatibility with Zigbee hubs and smart home platforms. The display can be switched between °C and °F. The IP65-rated housing and UV-resistant materials allow outdoor use within an operating temperature range of -20°C to 60°C, while measurement accuracy is ±0.2°C for temperature and ±2%RH for humidity. The sensor is battery powered (CR2477) and supports monitoring through the eWeLink app for data review and automation.

Advantages

Compact weatherproof design with IP65 protection and UV resistance enables use in gardens, greenhouses and other outdoor or semi-outdoor environments. Accurate sensors provide reliable temperature and humidity readings with ±0.2°C and ±2%RH accuracy. Built-in LCD gives immediate local readings and allows °C/°F switching. Zigbee 3.0 connectivity ensures integration with Zigbee hubs, Home Assistant and SONOFF ZBDongle devices. Long battery life (CR2477 up to about two years depending on use) and flexible mounting options (magnet or hanging cord) simplify installation and maintenance.

Suitable for

• Greenhouses and conservatories
• Server rooms, cold stores and storage areas
• Terrariums, aquariums and pet enclosures
• Caravans, RVs and outdoor cabins
• Home rooms for HVAC automation and climate monitoring

Key specifications

• Manufacturer: Sonoff
• Model: SNZB-02WD
• Connectivity: Zigbee 3.0
• Display: 2.2-inch LCD, °C/°F switchable
• Operating temperature: -20°C to 60°C
• Operating humidity: 0–100%RH
• Measurement accuracy: ±0.2°C (temperature), ±2%RH (humidity)
• Ingress protection: IP65
• Power: CR2477 battery (installed), input 3V
• Housing material: PC, ABS
• App: eWeLink; compatible with Home Assistant and SONOFF ZBDongle

How to use

Install the CR2477 battery if not already fitted, then pair the sensor with a Zigbee hub or SONOFF ZBDongle following the hub's pairing procedure. Mount the sensor using the magnetic back or the supplied hanging cord in the desired location, avoiding direct water exposure despite the IP65 rating for best longevity. Use the eWeLink app to view real-time readings, switch display units between °C and °F, review historical data up to 180 days, set notifications and create automation scenes based on temperature or humidity thresholds.

Usage recommendations

Place the sensor where air can circulate freely and away from direct heat sources or strong sunlight to ensure accurate readings. Replace the CR2477 battery when low and periodically check the mounting and sealing if installed outdoors.