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

Well worth the money I paid, the health inspector loves this system. I can monitor my temps, get alerts or turn them off, I can look at history and see the refrigeration cycles and consistency of the units. Ive caught problems before they destroyed product twice now by just paying attention to patterns.

works great amazing range

I had a need to monitor 2 refrigerators and 1 new upright freezer. These fit the bill perfectly and at a great price as I purchased 3 of them. My first foray into LoRa technology, Im happy I chose these as I can view temp/humidity levels in all 3 units on my phone, and get alerts if they are out of a range I set for each device. As far as accuracy, I cannot report as I do not have a NIST-traceable standard in which to compare. As far as precision, the fact they are in close agreement speaks to that (see photo). Primary down side to these devices is that you need another app on your smart phone to view. Bottom line: Very good value and I would/will continue to buy as the need arises. Update: May, 2023 After a year using 3 of these, I can say with complete confidence that they are BULLETPROOF. They have been reliably monitoring 3 appliances with perfect continuity, reporting and alerting. I think the hub and LoRa technology makes all the difference as the handful of cheap WiFi smart thermometers keep dropping off the network and overall, just frustrating to use. The YoLink devices never drop out and I have confidence that I can monitor my appliances (and soon a room) while Im traveling. Im buying another today and perhaps more later. You cannot go wrong with the YoLink system.

I have several of these units monitoring high and low temperatures. They work well, even when cold; they alert me when the freezer gets too warm. Alexa integration is lacking, however; you can’t trigger events in Alexa when the limits are exceeded. The in-app alerts work, but aren’t as flexible.

I ordered an additional temperature sensor as I have a few already and I am happy with them. I also have some water leak sensors. I was having a little trouble setting it up and contacted customer service and they walked me through it as they always do -I am very happy with the product and the service!

I stumbled upon YoLink while searching on the internet for separate smart temperature and smart humidity sensors for several automation projects in my home, so I was excited to find they have a temperature/humidity sensor (in a single unit). As an electronics and home automation enthusiast, I have since been adding them all over my home. Here are a couple pictures, and here are some applications Ive tried out or will be implementing in my home: Automating control of exhaust fan in bathroom - turn on fan before the room steams up during a shower/bath Keeping an eye on a fridge on its last leg Monitoring the temp and humidity of a bearded dragon tank. Both are very important. I also have automations to turn the heat lamp on if it gets too cold. My daughter, its her pet, has the app installed and receives notifications of problems with the temp or humidity. I also have a general tank light on a smart plug, on a schedule. I am going to be installing a whole house fan soon, and I want to use these, in most rooms of the house, to slow or turn off the fan, as well as to control ceiling fans in the bedrooms (to turn them down or off as it starts to get too cold at night, with the WHF running all night, otherwise). The ceiling fans are on Lutron Caseta switches, but the Alexa and IFTTT.com integration allows for automations that include multiple brands. Very flexible! I can see additional uses for this, keeping an eye on a wine cellar, a leaky basement (in conjunction with their Water Sensor), an unoccupied property or building or room subject to damage from freezing, extreme heat or humidity (and mold and other resulting issues). Thats a great price, too. Which is good, because I plan to get more of them!

The YoLink temp sensors are great. They work well, are accurate and are super easy to install.

My freezer

I did not have high hopes since I am expecting a device to communicate through block walls AND metal shed walls....BUT it is actually picking up a good signal! I am super impressed so far and I will continue to monitor and tinker with it this weekend. This device may have found a new home! Now I wish YoLink would make security cameras! You listening YoLink? Give us cameras! edited to add: This wifi hygrometer is amazing. It only lost signal one time, and thats when some guys installing a new fence for me cut my cable on accident. I was immediately alerted that connection was lost. I left work and pulled up to my house and asked why they cut the cable...they were baffled how I knew. lol I also sent an in app message to the developers and surprisingly received an email back within 12 hours.

I have 6 of them, I tried several others before and did not worked as this ones. I use them to monitor my cold rooms and freezers and they worked as advertise. The cold rooms and freezers previously could not being measured due to “distance” or thick walls, the signal with yolink has no problem. I write this review because this just paid itself, one of the rooms send an alert for high temperature, someone left the door opened, this has just saved me a lot of money and a big headache. I recommend them!