2 Pack SONOFF SNZB-02D Zigbee LCD Smart Temperature Humidity Sensor,for Remote Monitoring and Home Automation, Wireless Thermometer Hygrometer, Works with Alexa/Google Home, Battery Is Included

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.

These are useful and work well. I have eight of these to help manage a property from distance. There are a couple of improvements that would make them better.The gadget is un-necessarily difficult to open for access to the battery, including on first use. Pairing mostly no problem but on occasion a lot of patience needed. The App - Ewelink - needs to update readings more frequently; there seems to be no way of forcing an update of readings from within the App - it is necessary to close the App and reopen.Battery life seems good, I have had some for about 1.5 years now and the charge has dropped by one bar only.

🌡️ The module is small, but knowing the components required for it, it’s probably no surprise. This means that you can have an unobtrusive installation, and I stuck them to the walls in discreet places. The temperature seems accurate enough, with the first readings coming out to match the other temperature and humidity sensors that I have. Equally, the humidity readings were as expected.⚙️ The 3M double-sided foam on the back will hold this firmly to the wall. Remember to remove the piece of plastic under the battery to activate it after prying off the back. I have seen forum feedback mention that this is not easy, but it can be done with a small flat-blade screwdriver, and I have more of these sensors, so I am well used to getting the back off and on again. It's really not that difficult.🌡️ There is a small grid on one side for airflow, so when installing, make sure that is not covered up. At the other end of the sensor is the pairing button. Pairing them was simple with Home Assistant and ZHA, though I had to pair them again after moving them to their final locations. The sensors come with a piece of sticky foam, which I used to stick them in place. One went upstairs, but I wanted the other one in the kitchen, and that took some thought. I needed to keep it away from the cooker and the kettle, other sources of artificial heat such as a radiator, and sunlight from the windows. In the end, I was successful.⚙️ The sensors work very well, and Home Assistant tracks the history so I can see what the temperature trends are. The device also reports the battery status, and in my experience, the battery lasts a very long time. I have had one of these operating for 11 months, and the battery is still reporting 100%. ✔️

Ordered a 2 pack. One of the sensors works pretty much flawlessly, the other is a disaster. One of the big problems with these is that in order to open them and access the battery it's almost impossible not to damage them. I found no other way than to put a screwdriver between the gap and wedge it open as it is very firmly stuck.After painstakingly wedging it open, I set up sensor number one, which has been happily reporting every since.I did the same for sensors 2, set it up... and 30 minutes later it stopped reporting. I wedged it back open, set it back up... and 30 minutes later it was gone again. I removed the battery and left it like that for a few hours, then tried again. This time it seemed to keep working so happy days, I stuck it on the wall. All fine until 3 days later it stops reporting *again*. I tried re-pairing a few times but every single time it pairs fine but never even reports any data. So, I try to get to the battery again... but this time the sensor is actually stuck to the wall, too, so I try my best to carefully loosen it up with a screwdriver around the edges. Well turns out that the insides of the sensor are stuck better to the back than to the front/shell, so the board got dislodged... Put it back together, but it seems that the button on the board that the little plastic button on the outside presses on to is loose (it's not broken off and the button on the board itself still works, but pressing the button from the outside pushes the inner button up and off the board rather than pressing/triggering it). So what I'm stuck with is one sensor that works (1 for the price of 2; not a great deal) and one that won't stay paired and needs to be fully opened up any time I need to re-pair it (which I don't intend to keep doing every few days anyway).In short, impossible to open up yet very brittle insides, and 1 of the 2 sensors I got refuses to stay connected (distance to the gateway is not a factor, I checked).