Sonoff SNZB-02 Zigbee Temperature & Humidity Sensor


The Sonoff Temperature & Humidity sensor works exactly like advertised, but it has a big short coming that makes it difficult for me to recommend this sensor over it’s competitor from Shelly.

I bought this specific Sonoff sensor based on this marketing sentence from their website: “Measure the temperature and humidity in real-time, and sync data to your mobile phone in no time.” It turns out that “sync” functionality is very limited. There is no history synced.

That is the biggest drawback of the Sonoff SNZB-02, it does not record any history, the readings are real-time only which make this sensor kind of worthless to get any meaningful environmental data. Which means the only useful thing this sensor offers is the ability to turn on the fan if the temperature goes above a certain level.

Sonoff’s biggest competitor, Shelly, has a similar sensor called the Shelly H&T, which works directly on your Wi-Fi without the need for a Zigbee bridge and more importantly allows you to view the history of your temperature recordings in your home.

What are the PROS of the Sonoff SNZB-02 Zigbee Temperature & Humidity Sensor

  • Lightweight & Small Footprint.
  • Works with the EweLink App
  • Long-lasting (about 1 year) and easy to replace button cell battery
  • Accurate Measurements
  • Ability to use it to control other connected Sonoff devices

What are the CONS of the Sonoff SNZB-02 Zigbee Temperature & Humidity Sensor

  • Requires a Zigbee bridge in order to work, No Wi-Fi ability
  • No History, you cannot see the history or a graph of your temperature readings
  • False positives with the low battery warning (will often times say the battery is low even when it is not)

It’s still a fantastic device and works well despite these querks, but I genuinely hope Sonoff (ITEAD Intelligent Systems Co.Ltd.) will enable history readings in a future update. It will not be difficult to do, but I suspect their reasoning is budget related as it would require them to store the information on their servers, so it might become a paid feature.

Then again, if they do end up charging me to access my data then I will simply use Shelly instead.

Sonoff SNZB-02 Zigbee Temperature & Humidity Sensor Specifications

  • Battery Model: CR2450 (3 volts)
  • Dimentions: 43 x 43 x 14 MM
  • Pairing Time: 30 seconds
  • Supported Zigbee Gateways: Sonoff ZigBee 3.0 Bridge or any other bridge supporting the ZigBee 3.0 wireless protocol.
  • ZigBee: IEEE 802.15.4
  • Encryption Type: AES-128
  • Working Temperature: -10 degrees to 40 degrees celsius

Popular Categories

Ad Blockers AWS Bitcoin CMD cPanel crypto Dark web Google IoT MikroTik Python Reviews SmartDNS Sonoff Tor VPN Windows WordPress Xiaomi Youtube Raspberry Pi

Subscribe (It's Free)


Featured Articles

A smart bulb that works with the eWelink app
A smart bulb that works with the eWelink app

The Sonoff lightbulbs are very affordable and provide you with the basic functionality that a smart home needs. If the budget is tight and you don’t need all bells and whistles of the more expensive lights, Sonoff lightbulbs will do the job just fine. The prices start from $9.90 for the (plastic, White + color temperature) B02 B A60 and $12.90 for the fancy, pear-shaped B02-F-ST64 (glass, retro look, White + color temperature). As far as connected lights go, the prices are very attractive and Sonoff lightbulbs indeed are as inexpensive as you can get.

Read The Article
How to monitor the power usage of devices using a Sonoff Pow R2
How to monitor the power usage of devices using a Sonoff Pow R2

Sonoff Pow R2 is a 16A WiFi smart light switch that allows you to remotely manage and control your appliances and monitor your home energy usage. The WiFi light switch works like a power monitor, which allows you to keep track of 99% accurate real-time current, voltage and power on your app.

Read The Article
How to buy bitcoin on Binance?
How to buy bitcoin on Binance?

Binance exploded onto the scene in the mania of 2017 and has since gone on to become the top crypto exchange in the world. The company is very dedicated to making the exchange the premier source for trading, there are many trading events all the time, and coin approval doesn’t come without solid review. This allows for an exchange where every coin on it is considered to some degree legitimate. Binance actually understands the mindset and ethos of the crypto-community and the mantra of decentralization, it’s no wonder that they have the highest trading volume in the world while being a relatively new exchange.

Read The Article


Some articles you might also be interested in...

How to buy bitcoin on Binance?
How to buy bitcoin on Binance?

Binance exploded onto the scene in the mania of 2017 and has since gone on to become the top crypto exchange in the world. The company is very dedicated to making the exchange the premier source for trading, there are many trading events all the time, and coin approval doesn’t come without solid review. This allows for an exchange where every coin on it is considered to some degree legitimate. Binance actually understands the mindset and ethos of the crypto-community and the mantra of decentralization, it’s no wonder that they have the highest trading volume in the world while being a relatively new exchange.

Read The Article
How to access BBC iPlayer outside of the UK
How to access BBC iPlayer outside of the UK

You might have found that Hulu is limited to US viewers and the BBC iPlayer is likewise limited to UK IP addresses, however using a very easy to set up proxy server you can access BBC Iplayer, Hulu and many others from any country on all of your internet capable devices such as your Laptop, PC, Mobile Device, Kindle Fire TV, Apple TV, Google Chromecast etc. In this guide you get the ultimate viewing experience when streaming/downloading any type of regional or geo-blocked content online.

Read The Article
A smart bulb that works with the eWelink app
A smart bulb that works with the eWelink app

The Sonoff lightbulbs are very affordable and provide you with the basic functionality that a smart home needs. If the budget is tight and you don’t need all bells and whistles of the more expensive lights, Sonoff lightbulbs will do the job just fine. The prices start from $9.90 for the (plastic, White + color temperature) B02 B A60 and $12.90 for the fancy, pear-shaped B02-F-ST64 (glass, retro look, White + color temperature). As far as connected lights go, the prices are very attractive and Sonoff lightbulbs indeed are as inexpensive as you can get.

Read The Article