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

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.

Check your home temperature and humidity from your phone at any time. Works great in an apartment without a smart thermostat and I want to check the temperature when Im away. So simple to connect to the yolink hub.

I already have a hub and 3 sensors. Adding 2 more was as easy as scanning the QR and pressing the button. I added one to my shop and the other to my greenhouse. Setting the temperature alarms was just as easy! I tried other temperature sensors and they just didnt have the transmission range. Battery life is fantastic! If you need to monitor temperatures, Yolink is the way to go!

Very easy set up. Allows me to see freezer temp on my phone. After the freezer door was left open twice, this will warn me long before Ive lost food due to thawing! Well worth the investment!

Very happy with this Yolink hub and freezer monitor. Easy to setup.

Ive had 4 moisture sensors in the attic now for over 2 years and 2 temp-humidity sensors. Due to house layout, I have 2 hubs. From day 1 the hubs would not connect to the WiFi. Fortunately I have two router satellite stations with RJ45 plugs. YoLink sent me a third hub over a year ago, but it failed to connect via WiFi as the original two did. Today I pulled the third hub out again (Dec 2022), just to see if something might have changed. No joy, so hub 3 goes back into storage. I continue to see hub connection issues on the Q&A which YoLink attributes to firewalls, user connections, etc. In other words, the problem is with the user. Im convinced the problem is with the YoLink design, which theyve been unable or unwilling to fix. Yes, Ive been in touch with tech support when I originally received the hubs. No joy. Other than the hub issue, the sensors work great, and actually detected an AC condensation leak earlier this year and sent me alarm notices. But dont plan on the hubs being connected to your house WiFi. Maybe they will, but if they wont like many of us, you will have to rely on hard cable connection for operations.

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.

Nice to be able to check it and get alerts in case power goes out so we don’t lose our frozen meat investment.

Another essential device for remote monitoring, and takes seconds to add to an existing YoLink network. Has an easy to read local display, and is nicely living on the back wall of our vacation home fridge. Set the temp and RH limits on the app, and now I’ll know if the fridge fails or someone leaves the door open.

I bought this unit because the price is right and it has great reviews. I just set it up and it was super easy and the readings seem to be pretty accurate. Im only downgrading one star because I also bought it because I wanted a nice large display. The picture in the listing make the unit look like its four or five inches across, but as you can see in the picture Im posting its pretty tiny. I know this is partially my fault because I guess I didnt pay close enough attention to the specifications, but I do believe the picture is deceiving.