YoLinkSmart Wireless Temperature & Humidity Sensor, Wide Temp Range for Fridge, Green House, Pet Cage, App Alerts, Emails, Text/SMS alerts- Hub Required

Setup:Setup could not be easier.1. Install app,2. setup hub3. add sensor(s).4. Update Firmware.To make the hub setup quick and easy it's best to connect the hub to your router with an ethernet cable. The instructions have you scan a barcode on the hub using the app to register it, then power it up. It came online within a few seconds. WiFi can then be setup while it is connected via ethernet cable. If you wish to use WiFi power off and relocate the hub. It takes about 30 seconds to join WiFi after being powered up.Adding the sensor(s) is similar. Scan the barcode on the device with the app, then turn it on using a switch on the back of the unit. It will connect to the hub quickly. It is best to configure all the alerts and other settings while you have the sensor on a desk, then when the configuration is complete place the sensor where it is needed.Both the hub and sensor had the latest firmware as delivered which is awesome.Use:The LCD's still work even at freezer temperatures of -5f. The batteries in the LCD sensors will not last very long in a freezer. maybe 9 months, I have ordered some sensors that do not have an LCD and come with Lithium batteries good for 5 years.I'm really impressed how well the sensors work inside a freezer clear the other side of the house from the hub. It lives up to the hype. Sensors contact the hub about once per minute.App:The app is very good, there are some really detailed statistics you can view and there is an option to download data. I have included a screen shot of one of the charts showing a 24 hour view,Alerts:After setting thresholds, alerts can be sent via the app on your phone, an email, or SMS. SMS is limited to 15 SMS's per month but email works just fine and has no limit.Yolink Eco system:The number and variety of devices you can add to the hub is impressive. Given how easily the system and app works I'll be adding devices in the future.Highly recommended.

Installed in 2 freezers. EZ setup, reliable, have worked as designed for >18mos.Also added the Yolink leak detector to my system, which I placed on cellar floor.Peace of mind, knowing that I will receive an alert to my phone if my freezers fail or my cellar floods, is well worth the price and effort to put this YoLink system in service.Recommended.

We got this because we had a freezer die. We didn't notice it soon enough and we ended up losing hundreds of dollars of meat as a result. So, the cost of this is much less than having to buy a freezer full of food. The app is very easy to use. Setting up the hub was easy and adding the temperature sensors was very straightforward. We use the app to keep tabs on our fridge and freezers, especially when away from home. The sensors have been running now for close to 9 months and everything is going great.

I bought these to keep track of our garage freezer temps and our basement freezer temps in the event our power goes out or someone doesn't close the door all the way. They have worked well and keep me informed when the temps reach a certain degree. Easy set up and can be monitored on your phone from anywhere.

Previously I've searched for freezer monitors after a freezer full of food died. And the built-in alarm died with it. Well, this connects the sensors on something else, not Wifi or BT, into a tiny hub that just into any router.You download a fast smartphone app, and then scan a qr code on each device. They configure themselves!You can set temperature range alarms, and get alerts by SMS and email to your devices. And the system can add home alarms, more sensors, alarm sirens, all sorts of things. The LCD readout on each sensor can be read by itself, and the displays don't crack or freeze.You get to read a temp and humidity chart for each sensor. You can see how self-defrost really changes the temperature, and proof that a FULL freezer keeps a much steadier temperature.I'm in love with this thing. So simple to set up (if you look at the instructions) and such great information and performance.I'd actually give it SIX STARS if I could, and I'm a hard customer to please.

Bought these for remote temperature monitoring of my freezers. Have them now for 5 months and they work perfectly.Well worth the price paid versus losing a freezer full of food, at the very least you get a heads up that something is amiss. Bought a couple of extras, and am considering water sensors. Don’t know how long the battery life will be, information is around 2 years, you can also monitor battery life and they can be changed when they get low. Will report further as time passes. In my opinion, so far a quality product