ITEAD has introduced two new SONOFF devices: the IP65-rated SNZB-02LD and SNZB-02WD Zigbee 3.0 LCD Smart thermometers designed to work in liquids or enclosed spaces such as bathtubs or refrigerators, or outdoors in gardens or other humid environments, respectively.
Both devices look similar and can measure temperature with +/- 0.5°C accuracy, but the SONOFF SNZB-02LD model ships with a 1.5m long probe to measure the temperature of liquids in a pool, a bathtub, or fermentation vessel (for beer or wine making), as well as in refrigerators. On the other end, the SNZB-02WD features a built-in temperature and humidity sensor.
SONOFF SNZB-02WD/LD specifications:
- MCU – Telink TLSR8656F512ET32 (part of the TSL8656 family – See PDF datasheet ) Zigbee/RF4CE SoC with 32-bit RISC MCU, 64kB SRAM, 512kB internal Flash
- Display – 2.2-inch LCD
- Wireless – Zibgee 3.0 (802.15.4 radio on TSL8656)
- Temperature and Humidity sensor
- SNZB-02WD (internal)
- Temperature Range – -20°C to +60°C, ±0.5°C
- Humidity Range – 0~100% RH, ±3% RH
- SNZB-02LD (1.5m external probe)
- Temperature Range – -40°C to +115°C, ±0.5°C
- Humidity Range – Not supported
- SNZB-02WD (internal)
- Misc
- Button under bottom cover to enter pairing mode/factory reset, or switch between °C and °F
- Lanyard hole
- Input Voltage – 3V
- Battery model – CR2477 good for about two years
- Dimensions – 62.8 x 58.5 x 21.8mm (PC+ABS material)
- Weight
- SNZB-02WD – 65.6 grams
- SNZB-02LD – 86.2 grams (with probe)
- Temperature Range (Operating)
- SNZB-02WD – -20°C to +60°C
- SNZB-02LD – -10°C to +60°C
- IP rating – IP65
- Certifications – CE/FCC/ISED/RoHS
The SNZB-02WD is an updated version of the SNZB-02D, or other indoor Zigbee LCD temperature and humidity sensors, which adds IP65 weather/waterproofing so it can safely be used in a bathroom or outdoors.
Both models can be controlled with the eWelink app for real-time or historical temperature and/or humidity for up to 180 days. The mobile app also allows the users to export data, configure scenes for our aquarium or watering your plants, and supports voice commands through Amazon Alexa, Google, and so on.
The IP65-rated Zigbee LCD thermometers are compatible with a wide range of gateways, including SONOFF gateways like the Zigbee Bridge Pro, iHost, or NSPanel Pro, and third-party Zigbee gateways like Amazon Hubs, and open-source solutions such as Home Assistant and Zigbee2MQTT. But some only support a subset of the features, as you can see from the illustration below, so only some SONOFF Hubs and open-source platforms are recommended.
ITEAD takes pre-orders for the SNZB-02WD Zigbee LCD temperature and humidity sensor for $17.90, and the SNZB-02LD Zigbee 3.0 LCD thermometer goes for the same price. Both are expected to start shipping from the beginning of May. As usual, you can enter the CNXSOFTSONOFF coupon code to get a 10% discount on your order. If you prefer to wait for a review, Paisit has samples and his review with eWelink and Home Assistant should be up in the next few weeks.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
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