SONOFF Zigbee Indoor Temperature Humidity Sensor, SNZB-02D LCD Zigbee Thermometer Hygrometer, Works with Alexa & Google Home for Remote Monitoring and Home Automation, ZigBee 3.0 Hub Required, 1-Pack

The SONOFF Zigbee Indoor Temperature Humidity Sensor (SNZB-02D) is an excellent, versatile device with reliable performance. Despite being marketed as an indoor sensor, I installed it outdoors, and it has held up well. It integrates seamlessly with Hubitat, making it an ideal choice for smart home enthusiasts.In my setup, I use it to monitor outdoor temperatures to automate switching between my heat pump and oil heating system. The sensor provides accurate and consistent readings, enabling efficient control of my heating system based on temperature thresholds. Overall, this sensor is a great value, offering flexibility and reliability for various use cases.

Minor difficulty pairing with Smartthings. Install Edge driver before pairing.

The most important thing to me was how easy it is to hook up to SmartThings. I got this because someone on forums had recommended it because it is a Zigbee protocol device. Most time Zigbee devices can just be scanned for within SmartThings and you don't need to download any other special app. That was the case here although it was a bit of a puzzle on how to initiate pairing. It didn't actually say how in the little user booklet that has absolutely tiny writing in it in many languages. I had to find the manual online. It's such a simple thing why don't they just put that in large letters right in the front of the manual. All you really need to know on this thing is that you pull off the film so that the battery inside engages, then press the tiny little button on the back for about 5 seconds until the little broadcast icon starts flashing on the display. Then initiate a scan in SmartThings and it should pair pretty quickly and start showing the temperature and humidity within SmartThings.The other use of the button which is also not in the manual is that if you click it once it will change from C to F. Again basic basic stuff and it's not in the stupid little booklet they send, which really only tells you to go download their app which you don't really need. So that's why I'm deducting one star.I like the fact that this has a clear LCD display that's always on. A lot of these little units are just blank white plastic boxes.Accuracy is okay. It reads maybe 1° higher than my trusty mercury thermometer. I think it's more accurate than the little black thermometer unit shown in the photo.In SmartThings it responds perfectly and you can use it as a condition for actions. You can also see a nice graph of the temperature over hours and days. Nice.So what I really wanted to do with this was put it in my living room and have it turn on the air conditioning which is on a smart plug, during a certain portion of the afternoon, only if the temperature gets above for example 77F. My AC unit is perfectly safe to use turning it on and off with the main supply power. So: create a new SmartThings routine, as an IF precondition, set this sensor as equal to or greater than 77F. Then set the second IF main condition as a time range say 1pm to 6pm. THEN: turn on AC smart switch. If it never reaches 77F the AC won't come on. If it doesn't reach 77 until 3:30pm, it will only come on at that point. It works well, very very simple but effective.One could also set it to turn off in an evening time range as well if it reaches a certain temperature. But I have not needed to do that yet here in summer, since I always turn it off at sundown regardless and open the windows. This AC has a heat pump so I plan to use it in the winter too with a low limit temperature using the sensor.So this is maybe not as fancy as using something like a nest thermostat, but on the other hand it's very versatile, simple, cheap, and I can just use Smartthings alone, but also still turn it on and off with a Google home command.

poor build quality... battery refuses to stay connected causing device to disconnect unless I actively keep pressure on it to ensure it stays in... good thing I only needed it to act as a example for my own experiments building my own device using ESP32-c6's and integrating with Zigbee2MQTT, otherwise I would have returned this, but it is functionally useless due to the battery...Also, Coin Battery's are the worst! let us use AAA at the minimum those can at least be made rechargeable! the device is certainly big enough to fit several AAA batteries

Sonoff has become a strong name in the Hubitat world and like Tuya, is getting better and better. Still a bit pricier than the chinese products from aliexpress, but more trustworthy overall.As a temp/humidity sensor, I recently had a problem with one unit giving odd readings that didn't jive. (NOT THIS UNIT). I put 3 other units near it and they all reported nearly identical EXCEPT the one unit I was worried about. I've done the same on this unit, and it is 2% different than the other 3 units. so accurate? not exactly perfect IMHO. the temp is tho! The reporting speed is great, it doesn't burn batteries. I'm happy I bought this.

A small convenient temperature/humidity sensor with a display and zigbee support. I’m using this in an enclosed box monitoring storage humidity. It was added to Home Assistant without issue.As a battery powered device, this sends occasional updates and does not support polling.Not an issue for me. A couple updates a day would work fine in my application. However this would not make a good remote sensor for a thermostat. The updates aren’t that consistent. But it doesn’t make that claim either.Overall I like it.

The unit works well. It was easy to get paired with my Hubitat. The sensor looks really nice and designed well.

This sensor is great when it works. I initially bought two just to see how they worked, and they were great. Easy to add to my Hubitat and no issues. After a trial period, I decided to buy 4 more for other areas, and when I received them, they would not power on after removing the tab to allow the battery to make contact. Pressing on the back of the unit would cause the display to turn on, but it would fade to blank after removing pressure. This was the case with all 4 units. I thought that there might be a bad connection, so I opened each one, removed the battery, cleaned the contacts, and replaced the battery. This seemed to do the trick as the displays were all on and the battery level meters were showing full. Adding them to the Hubitat required factory resetting each sensor before they finally connected, which made me wonder if these were returned, but since they were connected and reporting in, I decided to leave them be. Now 3 months later, I'm finding that they're no longer reporting their data, and some are having the issues with seemingly to have dead batteries, but the display comes on if you press on them. Unfortunately, I'm outside of the return window now. I'm rather hesitant to buy new ones at this point and will research other options. 2 stars for the units that are actually still working.