SONOFF SNZB-02 – Zigbee Temperature and Humidity Sensor


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【Real-time Temperature & Humidity Feedback】Set the smart scenes to make your home at a comfortable level. Trigger the fan or humidifier when your home does not reach your expected environment. Check your mobile phone to get the sync data of the temperature and humidity.
【Easy Installation & Convenient】With a tiny shape and the help of 3M adhesive at back, it can be easily installed at any corner of your home.
【Voice Control】Compatible with Amazon Alexa and Google Assistant. If your Alexa has built-in hub, SNZB-02 can be directly connected to it without other Zigbee Bridge.
【Low-battery Notification】Replace the battery in time with a notification when the battery life is 10% remaining.
【Note】Zigbee Bridge and batteries are required. Keep a distance of less than 80M between SNZB-02 and Zigbee Bridge (open space). Alexa only supports checking temperature.

Frequently Bought Together
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Real-time Temperature & Humidity Feedback

Measure the temperature and humidity in real time, and sync data to your mobile phone in no time.Improve the Comfort Level of Your Home

Wish your home always keeps a favourable temperature and humidity? Enable the smart scene to make the fan automatically turn on when the room temperature reaches 28℃and the humidifier automatically turns on when the room humidity is below 45%RH.Install In No Time

Adopts 3M adhesives on the bottom of the sensor for flexible and fast installation on any surface of your home.Low-battery Notification

You will get a notification of low-battery level when the battery life gets 10% remaining.Share Once, Check Together

Simply share the sensor to your family and they can directly check the temperature and humidity on their mobile phones without pairing it.

SONOFF SNZB-02 Temperature And Humidity Sensor Real-time Sync Data Via e-WeLink App Work With SONOFF ZBBridge IFTTT Smart Home

SONOFF SNZB-02 is a Zigbee temperature and humidity sensor that can seamlessly work with SONOFF Zigbee Bridge to track the temperature and humidity change in your home, which all real-time readings can be checked on eWeLink APP. Better still, you can set a condition in the smart scene that is the fan is turn on/off when the temperature reaches the limit value, or the dehumidifier in your room starts working once the humidity is over higher, helping prevent the growth of mildew and allergens. You can set a smart scene to trigger alerts through events like high/low temperature, high/low humidity conditions and more. Device sharing function makes your kids, family, and even the neighbors informed about the environmental conditions of your home with their mobile phones. The camera feature is available on the sensor to make you know what’s go on in your home. It reserves time for you to take actions if a fire hazard arises. It is a battery-operated sensor that can be placed in any corner of your house to monitor the room temperature and humidity. Installation without any tool, simply stick the sensor on the surface of the wall or device and see it nicely to work for you!

Note: The battery level will be updated every 1-2 hours in order to save power consumption. If the device battery is not 100% when you change a new battery, please check it again 1-2 hours later, meanwhile, frequently enter pairing mode may cause a lower battery level display.



Additional information

Weight 28 g
Dimensions 45 × 19 × 49 mm

Product Type

ZigBee Temperature and Humidity Sensor



Wireless protocol

Zigbee (IEEE 802.15.4)





Certified Compliance


Works With


Customer Reviews

Based on 25 reviews
Very BAD Humidity Readings!

I used to like these sensors. I used to like them so much that I bough eight of them!
In my view they offered good quality, decent battery life (if not too far away from the Zigbee hub) and reliable temperature readings.
However! I've only recently realized that the humidity reading from these sensors are horribly wrong. They consistently all show too high humidity values. I've compared them to the new Sonoff T/H sensors as well as professional monitors I borrowed from work. Many other people on the internet have confirmed this. And here I was, worried about my house getting covered in mold. Turns out the now old Sonoff temp/humidity sensors are just bad at showing it.

Sonoff needs to remedy this somehow, maybe with an option to calibrate them or set an offset in eWelink.

I've included a screengrab from my iHost where you can see the readings from the new and the old Sonoff T/H sensors, both next to each other in the same room.

May I know how many pieces have the humidity problem?
For the problem, we will apply you a replacement of our new temperature and humidity sensor SNZB-02P. You can send us your shipping address and phone number via our email.

Zoltan Szekeres
The humidity value is not accurate

I would not recommend these as from the 3 sensors I got, none are reporting accurate values for humidity ( temperature is also different on all 3 , but much closer to real value ) . They could partially fix the issue if they would introduce calibration to the software, but as they have a new model of the sensor I doubt they will do that. Because of unreliability I would not buying the new one neither as I can't trust them anymore.

Thanks for your feedback, we will double-check this problem. Could you kindly show us pictures to check the problem?

Gerald Kowal
temp sensor issue pro and con

The pro it the price point, the ease of use and connectivity to start, the cons first the 3 star review is bec the first battery only lasted a few weeks and I already replaced it, hopefully that will do the trick, second I expected this was that it's plastic fragile so be careful where you mount it but for the price I can live with that, if it wasn't for the battery dying so fast it would be 5 stars

Very satisfied

Works very good

Rob B Inverloch
Great product

Reliable temperature measurement and connectivity. Love the way it integrates into Home Assistant so easily.

Henry Neemelaid

Works with Fibaro Home Center 3

Ken from Adelaide
Works with Ewelink app

Other linked apps dont work properly.
Samsung smart things app only shows humility level, need to open the tile to find out the temperature, I would prefer to easily see the temperature.
Google home app only shows the humidity level and can't see the temperature, so that is disappointing.
I am more interested in the temperature information.

Liviu Muscalu
Good job!

Work good till now.

Romain B
Good connectiivity, good battery life, good precision, good price

I'm overall very impressed with these sensors.

A+ for SmartThings systems

Good connectivity, including SmartThings and a very good price.

SONOFF SNZB-02 - Zigbee Temperature and Humidity Sensor