YoLink Smart Wireless Temperature & Humidity Sensor, Wide Temp Range (-22 to 158 Degree) for Freezer, Fridge, Green House, Pet Cage, Smartphone Alerts - Hub Required

Although YoLink does not support the major home automation protocols like Z-Wave, Zigbee, Matter or Thread, these devices have a major plus, they work, they work the first time and very easy to set up which cannot be said for the above protocols. Adjustment provided if you need to make an adjustment to temperature readings, mine were close enough that I did not bother. History display is excellent and alarms seem to work as intended. Note that it requires its own hub but the hub is inexpensive and only one is needed. I have not tried to get system to work with Google so can not speak to that. Excellent for use in freezers, work well through the steel box.

I have over 20 YoLink devices and have been using them for years. They extremely reliable and very reasonably priced. The set up is very easy and their customer service is available and outstanding. Bottom Line: GREAT PRODUCTS AND GREAT CUSTOMER SERVICE

I was looking for a system to monitor my home while I was away. After doing hours of research I selected the YoLink solution because, for my needs, it offered the best combination of available functionality and simplicity/reliability. The system connects to the internet using a small hub device. The *many* available monitors and sensors connect wirelessly to the hub using LoRa wireless technology, The LoRa wireless operates on a different frequency than home wifi and offers greater range. It easily penetrates walls and floors. All of my monitor/sensor wireless connections located in 3 levels of my home and garage are rock-solid. Setup is unbelievably simple. First install the phone app. Then setup the hub which can be connected to your home network wireless or hard wired. To add devices to the system, simply scan the QR code label on each sensor using the app and it will be added to your homes system. Thats it! I am currently using this for temperature/humidity monitoring, water leak detection and garage door (open-closed) status right out of the box. I havent yet tried programming which can add additional functionality. Using the apps notification features I can get alerts,etc on my phone and even on my Apple watch over the cellular network. I get all of this for a reasonable price. BTW, for video monitoring, I use Blink cameras. Using both systems is not cumbersome or inconvenient.

When used with YoLink smart hub this temperature and humidity sensor sends you alerts when your set limits are exceeded. Very easy to set up with YoLink ap and shows all device data on the ap. I place one sensor in my freezer and one in the house to monitor temperature at a glance from anywhere. Excellent system for peace of mind!

Love having an App on my phone to check my stand up freezer temperature wherever I am at. Took a bit over 10 minutes to set up. Well worth the sense of security knowing that my food is safe

I have 7 of these that I use. All but one seem to function with good accuracy. I have one that seems to be off from other thermometers by almost 5 degrees at times. Overall a good product with pretty good reliability.

This device warned me when our refrigerator/freezer was on the fritz. It was a gradual decline, which I was able to monitor to the apps history feature. Yes, our refrigerator/freezer failed, but the YoLink temperature sensor provided a blow-by-blow description as the temperature rose. And, the device allowed me to monitor the temperature after I had added dry ice, as a stop gap prior to the arrival of the repair person. But, whats particularly impressive, after I put the device in our cooler it was immersed in water and ceased working. Thinking that it was toast, I thought I might revive it by putting it in a container of rice. Alas, five days later, I inserted new batteries, and, low and behold, it came back to life! In the meantime I had order another from Amazon. So, now we have digital temperature gauges in both the freeze and refigerator to alam us to our next problem. This device is super easy to set up and works like a charm!

Easy wifi setup with hub. Add more in seconds. Very durable and accurate. I use these to monitor my freezers, fridge, and basement humidity. Will buy more as needed.

The device seems to work well in its app and is pretty accurate compared to other thermometers. I am having problems with Alexa integration and plan to call tech support later today. It shows up on the Alexa app and Alexa can tell me the temp if I ask. The problem Im having is that its not showing up under Smart home in the Alexa app so I cant setup a routine.

I already had a Yolink hub, and I added a couple of these to my system to monitor the temperature of my two freezers in the garage. I was skeptical about the signal getting out of a metal box, but it worked fine. In addition to preventing spoilage in the event of a power failure--I had a multi-tap power strip fail not long ago and almost lost a freezer full of food--the temperature monitors revealed that one of my freezers cycles between -2 deg. and -14 deg. I should probably replace that freezer soon since that wide a temperature swing suggests that the thermostat is not working well. I recommend this monitor. I have had good luck with all the Yolink products I have purchased.