Smart Wireless Temperature / Humidity Sensor Wide Range (-22 to 158 degrees) for Freezer Fridge Monitoring Pet Cage/Tank Monitoring Smartphone Alerts, Works with Alexa IFTTT, 2 Pack - Hub Included

Bought to monitor the temperature of our pump house. A small cinder block building separate from the house. The sensor has no trouble staying connected to the hub inside the house. Battery lasts a little over a year, even in the remote building through multiple walls. I am very impressed.

Bought this Fall 2022. Able to track indoor and outdoor temps in our house with our cell phones at home, out working and shopping, and away on vacations. Keeping us informed about our home heating situation and telling us what the outdoor temp is without another outdoor thermometer. The best most affordable choice on the market for homeowners. The outdoor sensor should be placed in constant shade on a north side not close to any heat source like a window or vent or an uninsulated wall. The WIFI for reception for all devices is good. Our base unit is in a basement home office. A sensor is in a less heated basement near the water service. Another sensor is in our master bedroom. This gives us our outdoor, basement and upstairs conditions that together give us a full understanding of our indoor/outdoor freeze potential. On vacation last winter, we realized from this YoLink system that our thermostat set backs to reduce our house heating was not working as expected. We called our daughter who came over the house and corrected our thermostats to the settings we wanted. We probably saved the cost of this equipment by substantially reducing our heating energy that one time.

I brought these to monitor freezer temps that we store food in as one of the freezers had been acting funny and we didn’t want to lose all the food if it died. Overall the device works great. However, battery life isn’t as advertised due to them not being shipped with lithium batteries that will live up to the advertised battery life. I brought 4 that had alkaline batteries and not lithium (makes a big difference when using in a freezer). Initially one sensor was intermittently reporting to the hub after less than 3 months. Customer support tried to tell me it was the signal, but the app said the signal was “good” and the other sensor was similar strength and not having any issues. Then the device dies, I replaced the batteries and everything is fine, the signal strength is not the issue. Customer support told me they would replace the devices, which sounds great, but they also told me they should have lithium batteries and would assure me the replacements would. When I received the replacements I checked and they had alkaline batteries too. I called them out on it and then they tell me the factory has a shortage of lithium batteries. I’ll try to cut to the chase here….the devices I received (8 in all, the original 4 plus 4 more in a replacement order) did not ship with the batteries needed to last the advertised 2 years. It feels to me like customer support tried to give me some bologna excuses on why there was issues, but come to find out they are shipping devices knowing full well the lithium batteries (which should last the 2 years) are not installed. Beware if you plan to use in a freezer or cold place, the alkaline batteries do not stand up the cold temps. Simple enough solution to replace with lithium batteries, for me the principal issue of not being shipped with the power to meet the advertised battery life, plus my dealings with customer support has left a sour taste in my mouth. I’d give 5 stars for the actual product with the lithium batteries.

After losing an entire freezer of meat, I wish I bought it before. I can see Temps any time and get an alert if it gets warm.

The YoLink app is simple, easy to use, and very straight forward. Pairing new devices is easy, and the information is easy to read. The hub was also easy to connect with my Google Assistant. In general I would recommend the YoLink system to anyone setting up a smart home. HOWEVER... My primary focus when buying this base set which included the YoLink Hub, and 2 Temperature / Humidity Sensors was to have my Google Assistant (and IFTTT) read information from these sensors and preform automated actions. Much to my disappointment, these sensors are among the few YoLink devices that are NOT directly compatible with Google Assistant and Amazon Alexa. There is an alarm feature that CAN be linked with IFTTT, but it is extremely limited. Once again, The YoLink system itself is genuinely nice and easy to use / connect with other services. My only complaint is that SOME devices are not compatible with all features. While the sensors I have don’t do exactly what I needed, I am keeping them and the YoLink hub as I will use it for other sensors I plan to purchase in the future.

After 6 weeks of use in our RV basement we are very pleased with the performance. We want to monitor the temp and humidity down there due to being in freezing temps. Love the phone app with the ability to set alarms.

We are currently using in a k-12 school system to monitor all our coolers and Freezers. Easy installment. App is easy to use. 24 hour monitoring with text, app alerts and email alerts. Economical! Highly recommend! Have not needed text support yet.

Using to monitor temperatures in Kitchen and Garage freezers. Also purchased YoLink Water Sensor 2 and that is working as expected. The hub and sensors have a nice look and feel. Tested high and low temperature alerts and can say they are working well so far. The YoLink app on the iPhone looks clean and works well for me. Dropped a star because setting up the hub to my WiFi network was a challenge. The hub only supports 2.4Ghz WiFi and apparently the iPhone must also be on 2.4GHz WiFi in order to set up the hub to work on a secure home WiFi network. The iPhone kept connecting to 5GHz by default and could not complete the hub setup step. Since 5GHz signals have a shorter range than 2.4GHz, I solved it by taking hub and phone to far end of house where I had a weak WiFi signal. Was then able to setup the hub to our WiFi.

First, setup was very easy. After calibrating all of the sensors (I have 7 total) I put one in each room and one outside. I can now check the temperature in each room from anywhere. Theres only two issues Ive had so far. 1) after setting up the hub, it downloaded a couple hundred GB of data from the internet. I checked the firmware for all of the sensors and the hub but they were all up to date. Id like to know what all that data was for. 2) it works with Alexa... as long as you only want to know the temperature. It doesnt show the humidity and you cant use it as a trigger to turn on the dehumidifier when the basement humidity gets to 45% or to turn on the fan when the room gets to 74°F, for example.

The 4 temperature sensors I installed appear to be accurate and produce a wealth of data via extended range bluetooth. This hooks up to yolink hub which in turn is easily linked to Alexa. The instructions are a bit skimpy but the telephone support was outstanding. Hopefully no longer returning from vacation to find my frig full of mold consequent to.a thermostat failure. The app supports sending an email and/or an sms when the high low temp limits I set are exceeded. It shows a graph of temp.and humidity daily/weekly/monthly. I just installed this system today, the day of delivery. No idea about longevity etc. Ill update review as appropriate. Im hopefull.