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

This device saved me a lot of grief. I put it in the refrigerator and discovered the temperature was going up into the 40’s overnight. The digital fridge temp always said it was 37, so I wouldn’t have know there was an issue until the fridge conked out. I got the fridge fixed before it was a huge hassle. This device is worth every penny!

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 ordered the hub with 2 temperature sensors and ordered a third temperature monitor as we have 3 freezers wed like to manage. It took me a little bit to figure out how to set the settings to trigger an alert to my phone when the freezers hit a warmer temp but once I figured it out it was smooth sailing! We have 3 deep freezers and would be a bit devastated to not know a freezer failed before it was too late Our freezers are in a detached garage but we do have an ethernet cable in their so have the hub plugged in out there. So far these have been working great!!

I had a plug in a remote corner of my home that had a competators WiFi controlled plug. I would lose connectivity. I cant blame the wifi plug, but had very little options to improve the sub-prime location of my wireless router other than costly investment in MESH or other solutions. So, I repurposed that plug to another location and used this product from YoLink. Once I set up the LoRa hub (REQUIRED!) and the plug, it works wonderfully. It was easy and quick to set up and when I went to Alexa I was smiling what I found that the YoLink SKILL actually had a positive rating unlike many others. After this great experience, Ive added 4 of their water sensors, an indoor and outdoor thermometer, and got 2 of the FlexFobs. All accessories were similarly easy to set up to connect to the same HUB and very quick to set up and get into my Alexa routines. Literally 20 seconds to set up using the scan QR code in the App. It took longer to open the boxes! What I have set up (so far) • YoLink Hub • 4x Water Leak Detector • 2x Flex Fob (one wall mounted, one to carry) • Indoor Thermometer/Humidity • Outdoor Thermometer/Humidity Pros: • Easy to set up • Good range (at least better than WiFi) • Integration with Alexa • Extra credit for making use of minimal packaging. • The FlexFob can be used in any Alexa routine not just other YoLink devices (under Smart Home each of the 4 buttons is treated like a motion detector) • The FlexFob even included a wall mounting bracket, which was a pleasant surprise for me! Cons: • Basically none. • If I had to complain about something, I guess the mobile app could use some refinement (You need a few clicks to go into settings to change something as a favorite, etc. which maybe could have alternate way, such as a click and hold)

Wow that was Easy press that button on the back to turn on sensor and setup in app. Of course setup the Hub first. Create and account after connecting Hub.. I connected my hub directly with network cable. Hub does support wifi connection to your network. Once Hub is powered up in app just click the Add icon upper right, enable app to use camera and scan QR. Next click the Add icon again to add your sensor scan QR on sensor and well did I say it was easy. Next go to your Alexa app and go to Skills and add Yolink and Enable and link your account. No need to scan for new devices in Alexa. Just say Alexa what is the temperature on the Themperarure and Humidity sensor you can change the name of the device but ha that was so easy. Did I say it was easy...

Easily monitor temperature when not home, alert if it exceeds limits. Very easy to set up with the app.

I bought a temperature sensor/alarm just to see if this thing works. Now I have about a dozen devices and they are so easy to install and configure. Ive called support a few times and the support was quick to respond. I have a temperature sensor in a metal building 400 away and it works perfectly. Easy to recommend this product.

I have lots of yolink devices these are great but I have a cheap phone so had to copy and make code darker and bigger. Then scans fine. Work great with their hub. Fairly cheap. And the product support from the company is one of the best. Plus I like that they are local in Irvine CA.