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.

These work well for Home Assistant if you have zigbee hardware, can trigger fan or space heaters based on input from these devices. Just what I needed.

After about a year, it's no longer on speaking terms with the coordinator, or node-red. it says that it is paired to the network, The coordinator says it's there, it seems to be reading and displaying the temperature and humidity, but it no longer transmits any of that data to the coordinator. changed the battery. let it sit with no battery for a while. giving up. dont need a local display anyways. edit It upgraded it's firmware and seems to work now with the latest Z2M.

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.

mostly ok but seems to have trouble keeping connection

I'm usually a big proponent of Sonoff gear - I've been using their stuff for going on 10+ years now. So when I say that this particular model of sensor has been nothing but headaches, please know this is the exception rather than the rule. But... THIS THING IS NOTHING BUT HEADACHES. I bought two of them, one for my office, and one for the master bedroom. I wall mounted them with the wall mount kit. The screen on the one in my office went blank within the first week or two. Amazon replaced it for me. Replacement seemed fine. I put the one in the master bedroom which seemed fine, so I assumed I got a bad unit with the first one. But that one chows through watch batteries like a kid goes through candy at Halloween. And that's likely because it's having to work harder to get a Zigbee signal, but then the display started going blank, just like the first one, and of course, after the warranty on it expired. If I put pressure on the display with my fingers, I can get it to come back, but then I ever so gently place it on the wall and... the display goes blank again. Also, firmware updates... Home Assistant is helpful and tells you when there's a firmware update available for these units. But if you do one, you should put a new battery in the unit, do the firmware update, and then throw that battery away and put a new one in it, because the firmware update will chew through the battery life faster than you can imagine. And don't do a firmware update on a battery with 50%, or you might brick your sensor. I bought two of the Sonoff ones that don't have a display, for customers, to monitor rooms where temperature matters. They work great. They probably will chew through batteries on firmware updates, but... if you want a display, go look at another brand or model for this particular thing. Which stinks, because Sonoff did a lot of the right stuff on this - most notably the wall mount capability, that I can't find anywhere else.

I use this with hubitat and the fact that it has a screen with the temperature and Humidity on it in addition to the hub interface makes it perfect.

Lovely display, very clear with light. This doesn't have a backlight so no night reading. The reporting to the zigbee network is timely. I would love that the display also had a clock. It is the only thing that I miss on this device.

Interessante termometrino per interni, dal costo molto modesto. E' carino da vedere: è piuttosto piccolino, ha un display grande e ben leggibile, e le temperature e l'umidità misurate sono precise. Essendo Zigbee, può essere usato come termostato. Io l'ho preso per regolare una stufetta in bagno. Ho preso una stufetta Tuya, che controllo con un pulsante e un termometro Zigbee. Oltre alla temperatura e all'umidità, trasmette anche il livello della batteria interna, che dura tantissimo.

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

I gave chance to buy 4 of these and I was not disappointed. It paired to CONBEE II quickly and it is few months already it sits on top of one of my shelfs providing quite accurate measurements. I can recommend this seller and the product.

Very nice

Descripción del producto para su venta dice: 2 paquetes y solo viene 1. Pero si es buen producto