2 Pack SONOFF SNZB-02P Zigbee Temperature and Humidity Sensor, Smart Temperature Sensor with Comfort Alarm, Zigbee Hygrometer Compatible with Alexa/Google Home/HA/IFTTT, Zigbee Hub Required.

These are great at what they do, packing a lot of functionality into a nice small form factor.They connect easily to home assistant (via zigbee2mqtt) and give accurate readings. We’re using them to monitor the temp and humidity in our cellar and find them really helpful for working out what we need to do with heating/ventilation to keep the rooms damp free. Great value for money - would definitely buy more of these

The humidity sensor integrates in to the Zigbee network easily and keeps sending humidity and temperature information back to your phone. To get the information on the phone, you will need the Zigbee gateway connected to the internet. The main reason why I got this sensor to trigger a Zigbee switch to switch on my exhaust fan if the humidity is high. And this function was easy to set up on the ewelink app. For this to happen, you dont need it commented to the internet as it all happens through the Zigbee network. The sensor itself is neatly designed and it works on button cells (with a claimed life of 2 years before you need to change button cells). It also comes with double sided tape and it can be stuck to an appropriate place of your choice. Overall very happy with my purchase.

I bought 6 of these sensors, 4 worked well and two needed to be paired a few times before they worked but overall they are a good buy. Although they come with good fixing is disappointing that the sensors are now round as the previous square ones were ideal for standing on a shelf or picture frame.

I'm using these with Home Assistant and have had no issues with conenction (even with one of them in a fridge), seem to be pretty accurate and update regaulary too. Battery life also seems to be in line with the advertised duration though I'm only a few months in so it's hard to tell for sure at this point.

With a new born in the house I needed to know the temperature in each room to make sure we were not over or under dressing them. These sensors are compact and can go everywhere. We get a notification if the temperature is too hot or cold. They are built really well and have a magnetic base. Good buy!

These seem to work really well. I have had two for 3 months, 1 installed outdoors and the other in a bathroom and both have been flawless. I am using these with Z2M on Home Assistant and the data gets reported in a timely manner (at least every 60 minutes) and yet the batteries still show as 100%.I also bought some Sonoff SNZB-02D which I hoped would work as well but with the benefit of an LCD screen but those turned out to be terrible. Get these instead.

In my experience SONOFF ZigBee devices are just too unreliable. These didn't change my opinion

Initially very poor connectivity on a couple of sensors ( a temperature sensor and a door opened sensor), with one needing regular restarts. After a lot of fiddling with repeaters in the same room as the sensors, the temperature sensor is working fine with no drop outs. However whatever I try, the door opened sensor still regularly drops out for an hour or so, and then reconnects. At least it does not need restarting.Now all my 6 temperature sensors are working flawlessly, after very attentive support from the seller, I am upping my review to 4 stars. I guess batery powered zigbee devices are very sensitive to the zigbee signal and this may not just be a Sonoff issue.