SONOFF SNZB-02D Zigbee LCD Smart Temperature Humidity Sensor,Works with Alexa/Google Home, SONOFF ZigBee Bridge Is Required, Battery Is Included

You know how the things are looking like when you are a home automation fan? You have plenty of sensors and screens in the house but you still don't have enough. ☺️ Despite the fact that I already have in all the rooms accurate temperature/humidity sensors from Shelly - connected via Bluetooth, I noticed that there is a long way until someone (ok, my wife as always 😂) will actually read their values using the screens from the walls or phones. This encouraged me to look for some simple and nice looking screens, but also having a good quality and durability. Considering that I'm already using several other gadgets from Shelly, Zooz, Aeotec, Philips, Innr, Zipato, TpLink and Sonoff and I'm very happy with their simplicity and quality, my choice was mainly made by the price and offers that these brands were offering at the moment of buying. Therefore, I found that Sonoff came with the best balance price/quality. Connectivity was not so important as I'm using both Zigbee and Z-Wave protocols (AEOTEC for Zigbee and ZOOZ for Z-wave). I knew, therefore, that I'll have no issues connecting a SONOFF sensor to an AEOTEC zigbee module. Functionality is good, see the picture attached. This is also confirmed by the Shelly temperature/humidity sensors from the house. The screen is simple and has a nice contrast and if I have no complaints from my wife, then it worked 100%. 😎 There are two variants of attachment. On the wall using a strong magnet and on the table. What I like about them is that on the wall you can stick the magnetic part using 3M double tape already attached. That plastic part is like a pocket for the sensor, you can - if you want to move the sensor somewhere more visible or you wany to measure the temperature in a different place - you can literally take the sensor from its pocket and place it on a table. Battery type is CR2450. I bought the pack of two sensors and I had to replace the battery to one of them as it was empty, while the other one had a full battery. I had a Duracell CR2450 spare battery already so this was a simple fix for me. Not sure about the battery life overall, I'll be back here later for updates regarding this matter. But the lesson will be from this episode to have a CR2450 spare battery as you never know when you need one ;)

I bought these to use with Home Assistant, and the setup was surprisingly easy. They connected quickly and were recognised without much effort, which is always a bonus when dealing with smart home devices. The screen is fairly simple but clear, showing the temperature in a way that’s easy to read at a glance. It doesn’t try to do anything overly complicated, which I actually prefer. The temperature readings also seem very accurate based on what I’ve compared them with around the house. For the price, they offer really good value and do exactly what I needed them to do. Overall, a straightforward and reliable option if you want an affordable temperature sensor that works well with a smart home setup.

Before deciding on a very simple room temp / humidity meter I did an extensive research. I only wanted an accurate one, and browsing through dozens I started giving up on the idea. Then I thought, hell if it’s not that accurate at least it should be SmartThings friendly. That’s how I found this product. The official website mentions a +/-0.2C temp accuracy and a +/-2% RH humidity accuracy, which I truly found a bit far fetched as most sensors allow tolerance of exactly or above 0.5C for temp and 5% for humidity, which are quite huge if you think about it. So while 0.2C and 2% sounded really really great, I took it with a pinch of salt. Well I have to say, it’s delivered its promise, which was quite unexpected to be honest. I bought 2 because they were on sale, so I thought I could at least test out that promise. I left both thermostats in a closed room (with no draft) for overnight to allow them to sit. In the morning I took a picture of the reading (attached to this review) and I was shocked how accurate these lovely little things were! The SmartThings integration was a bit tricky as it wasn’t listed under the choosable options, I had to search for Sonoff and add them through that step. I also pushed and held the one and only button when it didn’t get discovered the first time, as I figured that was what had to be done to put it in discoverable mode. This wasn’t in the manual, which was very short and very small print, I couldn’t even read it. Though it was common sense to push and hold a button to make it discoverable, perhaps not everyone would automatically assume this step. Anyway, I highly recommend this product for its accuracy and for excellent SmartThings integration, as I can use it with any routines.

I’m using these SONOFF SNZB-02D temperature and humidity sensors alongside the SONOFF Zigbee Bridge Pro to automate tasks across my property. They’re installed in outbuildings to monitor environmental conditions, and when thresholds are reached, they trigger smart plugs and appliances such as heaters, fans, or dehumidifiers. The sensors are accurate, responsive, and integrate well with the app. Important note: these sensors require a Zigbee bridge to function as smart devices. Without one, they simply act as standalone digital gauges with no automation or remote monitoring. Once paired with the bridge, they unlock full smart functionality. Setup wasn’t flawless, which is why I’ve rated them four stars. Pairing was a bit fiddly at first, but after speaking with SONOFF support, I learned that connecting and updating the sensors close to the hub or router makes a big difference. Once I followed that advice, they paired quickly and worked reliably. The LCD display is clear and easy to read, and having both temperature and humidity data available remotely is a huge plus. Signal range varies depending on walls - in my wooden cabin, the sensor works fine at around 15 metres. In my brick garage, the signal weakens at just over 6 metres, so placement matters. Battery life initially was quite short, but after replacing with a branded battery, they seem to be lasting a lot longer. They’re not the cheapest sensors out there, but the functionality and integration make them worth it if you’re building a smart automation setup. Just follow the pairing tip and make sure you’ve got a compatible bridge.

I’m really impressed with these temperature and humidity sensors. They feel well-made and sturdy, like they’ll last a long time. The mounting system is a nice touch—it uses a magnetic fixing, so you can easily take the sensor on and off the wall. The adhesive backing stuck well to both my wallpaper and a wooden doorframe, so no issues there. Setting them up was simple with Zigbee. I connected them directly to my HomeAssistant server without needing the app, and they immediately started reporting temperature and humidity. The accuracy seems spot on, matching closely with my thermostat readings, and, most importantly, updates regularly enough to be useful. I’ll be using them to help control both my dehumidifier and heating system via automations using the data they collect. The screen is clear and easy to read, with helpful icons that show when the temperature or humidity is outside the specified comfort range. As a bonus, they came in minimal packaging, which I appreciate for the environments sake. For the price, these are excellent sensors, and I wouldn’t hesitate to get more if needed.

Bought this to monitor temp and humidity changes in an unheated part of the house. Has a kick stand so can sit in a shelf, which is how I use it. Also comes with a wall mount with screw or sticky pad fixings. It’s small and very unobtrusive. So will blend in easily while remaining easy to read. The important functionality for me is the historic data collected. I can easily see this in the app and track how temperature and humidity changes over the course of the day and when certain things happen around the house. For that, this has been perfect.

UPDATED ** I was contacted directly by Sonoff (after my review) to try and help troubleshoot. They replaced the faulty sensor very quickly and then wanted me to send some detailed stats from Zigbee2MQTT. Their tech support does seem to know what they are talking about even regarding 3rd party products such as Homeassistant, Zigbee2MQTT and ZHA - which is encouraging! I didn't send them any stats, however, as the devices had stabilised and were (and still are) perfectly solid. I'm not sure if this is due to a Z2M update (I have auto-updates turned on) but the devices are stable both connected directly to the Sonoff Zigbee coordinator and when bridged via a dodgy (very cheap) presence sensor. In terms of accuracy, they differ from Aqara but are consistent between themselves (certainly within the +/- 3% you would expect for this type of product). I guess it is just a calibration difference with Aqara, so I have adjusted the Z2M calibration settings and my automations are working fine again. Now that all the reasons I marked it down have either gone away, or been addressed by Sonoff, I have revised my review up to 5 stars. My shower fan/dehumidifier combination is working again so I am happy! Thanks Sonoff. Original Review: I bought these to work with Homeassistant. I have the flexibility to use them with either ZHA or Zigbee 2 MQTT. I have tested them with both. Z2M was very problematic - I couldn;t get them to report temp and humididy reliably so I gave up and switched to Z2M. Under Z2M they are HUGELY sensitive to which zigbee device they pair with. If I pair them directly to the coordinator (a Sonoff Dongle P) I get no temp or humidity readings. If I pair via a cheap zigbee power plug, acting a a repeater, I get temp and humidity but as soon as my zigbee network auto-reconfigures, it connects to a local zigbee motion detector, and stops reporting agian. When it does report the humidiy readings are not reliable. I has a shower in the ensuite and it was reporting 85% - with condensation running down the walls. As I have has so many problems with unit 1, unit 2 has been sat in the (unused) spare room. I went in there today and unit 2 is showing a blank screen. After less than 2 months of extremly light usage! I went to Amazon to organise a return/replacement and they say I have to contact the manufacturer.... in China. Total waste of money. Dissapointed in Sonoff (I use a lot of their Sonoff Basic switches), but especially dissapointed in Amazon. If we aren't getting basic break-fix in warranty support I may as well use Aliexpress. I'm going back to my Aqara sensors. They eat batteries but at least they work!

I love the simple design of these, but I'be recieved multiple broken ones. Some have trouble updating to the server from new (even though the screen updates fine), but I've also had one that worked fine for about a week, before loosing connection and never working correctly again. I've also had one that seemed to work fine, except it was always 1-2 degees warmer than all my other temp measuring equipment. It's really annoying when you buy a pack of two, just to have one not working. I recommend buying multiple packs if possible and trsting them all before sending the broken/un-needed ones back. All companies seem to have this problem with smarthome stuff. I don't know if it's due to cost cutting (cheaping out on components), or not checking quality enough on the production line :(

Great Temperature /Humidity sensor. Good accuracy and integrates well into my Home Assistant automation through the zigbee integration.

These devices are very stylish, practical and reliable. You can mount them anywhere or don't mount them at all, just place them on your shelf. They use so little battery that I haven't had to change battery in months! Set it and forget it. Change battery when needed and forget it again.

Used for barely a month and with HA. I use only the temp function and HA then controls the floor heating. Temperature was calibrated correct. Humidity senor I did not have any means to test. I have seen reports that it is not celibrated correct from factory. It could have had screw holes for wall installation but it came with a 3M tape pad for that purpose. The wall holder is also megnetic so it can sit on the fridge door etc.

ho preso questo sensore per tracciare le temperature/ creare automazioni su home assistant, e devo dire che fa il suo lavoro alla grande. l' aggiunta è stata istantanea, appena acceso è apparso tra i dispositivi disponibili ( uso Zigbe2MQTT) , e l' accoppiata è stata fulminea. Le misurazioni sembrano precise e accurate ( ovviamente dipende anche da come viene posizionato all' interno della stanza). La batteria per il momento sembra infinita, dopo circa 2 settimane di utilizzo è ancora al 100% , nonostante faccia letture continue per via delle automazioni che ho implementato. Anche la ricezione del segnale zigbee è molto buona, ma va tenuto a mente che non è un router per questa rete. Le dimensioni sono compatte, e permette di essere posizionato un po' ovunque grazie alla sua basetta ( pieghevole), e al retro magnetico. lo schermo risulta sempre ben leggibile , e non crea fastidio al buio. Per il prezzo a cui viene venduto , sono più che soddisfatto, e probabilmente ne prenderò altri per le altre stanze della casa.

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