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

The tools, habits, and hardware needed to speed up your computer
The tools, habits, and hardware needed to speed up your computer

Whether it happens gradually over time or all of a sudden, trying to work with a slow computer can be seriously frustrating. Even if you’re fairly diligent with the maintenance of your laptop or PC, it’s surprising how quickly things slow down. If you are asking yourself “Why is my laptop so slow” and running Windows 10, 8, or 7, this post is for you!

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
How to transcribe video files to text files using Amazon AWS Transcribe for Free.
How to transcribe video files to text files using Amazon AWS Transcribe for Free.

Transcribe a video to text using AWS. In this tutorial we will create a Word Document from a YouTube Video using the automatic speech recognition service from Amazon called, AWS Transcribe. Amazon Transcribe is an automatic speech recognition (ASR) service that makes it easy for developers to add speech to text capability to their applications.

Read The Article


Some articles you might also be interested in...

Sonoff SNZB-02 Zigbee Temperature & Humidity Sensor
Sonoff SNZB-02 Zigbee Temperature & Humidity Sensor

Enclosed in the same shell, SNZB-02 Zigbee temperature & Humidity sensor reports back every couple of minutes. The sensor is powered by CR2450 3V battery. The extra capacity means that the sensor will last a really long time. I have a heater connected to eWeLink app and, once I added a hub (absolutely required) this thing has performed well. The heater is controlled within +- 1°C. That's another thing, eWeLink only provides temperature readings in °C with no option for °F. I'm thinking about placing another sensor on the outside of the window so that I can control based on outdoor temperature as well.

Read The Article
How to block ads on your network using Pi-Hole and a Raspberry Pi
How to block ads on your network using Pi-Hole and a Raspberry Pi

With Pi-Hole you can block in-app advertisements. Network-level blocking allows you to block ads in non-traditional places such as mobile apps and smart TVs, regardless of your hardware or OS and since advertisements are blocked before they are downloaded, network performance is improved and will feel faster. Pi-hole is a black hole for Internet advertisements.

Read The Article
How to download Youtube videos as MP3 files.
How to download Youtube videos as MP3 files.

To convert a Youtube video or any video for that matter requires just one step, in essence you will transcode the video file (normally an MP4) to MP3 using ffmpeg. In this tutorial I will show you how you can convert videos to audio in a matter of seconds, it does not cost a cent and requires very little effort.

Read The Article