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 been using home automation products for several years but I never found a good solution to monitor fridge and freezer temps. We have 4 freezers and I have purchased one of the smart wireless temperature sensors for each. I have found these to be reliable and its great that you can set up alerts in the YoLink app to send a message to your mobile device as well as sound an alert on the hub when it goes out of range. It doesnt update continuously more like every couple minutes or degrees of change so it gives you time to put away groceries without driving you crazy but if you accidentally leave a door slightly open it notifies you quick enough that you cant drive too far away when leaving the house before you are notified.

I like the compact size of the device. Its on the back deck right now, where the temperature is a cool 7.7 F. (at 8:40) and the YoLink says it was 1.4 F at 7:55 and that time difference makes it hard to know if the YoLink is correct. But, early this morning I did see it 0.2 F displayed on my phone, and the local weather station (down the street) recorded a low this morning of 0.6 F. So, I think its working pretty well. Before I put this outside on the deck, I noticed that changing from C to F or F to C, would instantly display the current temperature (on the LCD and the app). So, it can be forced to sample, display and send data to the app. The only negative I can see right now, is the slow sample rate that Im seeing when the sensor is outdoors. I can ask Alexa what is the temperature in the Prius and she says The Prius Temperature is 5.7 Degrees. But, I dont yet know how to create an Alexa routine that can trigger an action when the temperature is <= 5.0 F.. So, this sensor isnt very useful yet. Maybe I should see what IFTTT can do for me. ~~3/26/2023 I ordered a Yolink SpeakerHub. I can trigger a Yolink Routine when the temperature hits an alarm limit! I set the limit for 90F and put in a south facing window. When the sun comes bright, it gets up to 90F and commands my Yolink speaker to say (custom) Hey Google, turn on the Inverter. My Google Hub, controls Meross Outlet 120Vac switches. The switch named Inverter turns on, drives a relay that activates my 3000W Sine Wave inverter. The Alert Interval is set for 60 mins. (if the sun is still warm, we get a new Alert every hour). My Merross switch is set to run max run time of 65 mins. If it gets a restart every 60 mins, it keeps the inverter running until the sun is about to go down. My inverter is driven by a 48vdc battery bank, but when its charged, I can use the 800w solar panels to run some the loads in the basement. Freezer, Fios system, inhouse ethernet gear and a PlaneFinder tracking system. The main loads are the sump pumps. When the basement floods! Like we just had when all the snow melted. Both Alexa and Google speakers can work to control the solar inverter, Im using a Google speaker hub, because it was already installed near the Yolink Speaker Hub.

Although YoLink does not support the major home automation protocols like Z-Wave, Zigbee, Matter or Thread, these devices have a major plus, they work, they work the first time and very easy to set up which cannot be said for the above protocols. Adjustment provided if you need to make an adjustment to temperature readings, mine were close enough that I did not bother. History display is excellent and alarms seem to work as intended. Note that it requires its own hub but the hub is inexpensive and only one is needed. I have not tried to get system to work with Google so can not speak to that. Excellent for use in freezers, work well through the steel box.

We have tested various devices for a few weeks. I have to say that we are very pleased. The first thing we noticed when unpackaging was that everything seem to be designed and made with attention to detail and care. That was a little surprising for us. Many times you get cheap packaging and apps that look like they were created in a single afternoon. Not so in this case. We had to double check to verify that this is a start up company. By all outward indications, it feels like it’s a well polished company that has been in business for quite some time. All manuals and set up information is available online. Do not expect much in the box. We had a little difficulty finding the information we needed at first but we were grateful, and still are, for the fast response from the company. Since we mentioned the company, we have to note that any kind of support request is answered promptly, even at odd hours of the night. That was surprising. But they have always been friendly and helpful, even when we should have checked product documentation first. The initial set up was a little challenging with Wi-Fi. But that is not due to product limitations. It is due to limitations on the wireless routers we used. The wireless routers we used did not allow us to separate the 2.4 GHz and 5 GHz networks. This system uses the 2.4 GHz network, which is needed in order to have the range. In the end, which simply hooked up the network hub to the router using the provided ethernet cable. Everything has been pretty much smooth sailing. Again. The system requires a 2.4 GHz Wi-Fi network. If you have trouble getting it to connect wirelessly, the issue is almost certainly your wireless router failing to separate the two networks or failing to allow the device onto the 2.4 GHz only. It’s not a product limitation or defect. Our recommendation is just to hook it up with the ethernet cable since the range is very long, anyway. Before using the system, we recommend updating the firmware on all devices manually. Depending upon how long it has been sitting in the Amazon warehouse, you may have an older version of firmware and might experience a few bugs. That was our case. We had a few problems with erroneous notifications that were rectified as soon as the firmware updated. The update, you find the firmware version in the device and tap it. The firmware does update automatically. But if it’s your first time setting up, it’s good to manually update the devices. We would love to see a way in the app to review the firmware status of all devices on one screen and manually trigger a firmware update for all devices from that same screen with a single click. But this is merely a want, not a flaw. Do not forget to edit the alarm strategy before you start using the system. It appears to default in the app to multiple strategies, which can mean getting an app notification, an email notification, and or text message notification each time something is opened or motion is detected. That might be something to look into on the app development side as far as prompting you during set up to choose your desired preferences. We have had no difficulties with the devices maintaining contact with the network hub. The network hub has reported itself going offline once or twice overnight, but this appears to be momentary and related to a firmware update automatically applying and automatically rebooting the device. Battery life so far appears to be really good. We are surprised by the quality of the 3M self adhesive tape on each one. There is no alcohol wipes provided, but we used simple rubbing alcohol and a cloth to clean the surfaces prior to sticking the devices on. You can do similar or just make sure that it’s really clean. As a test, we applied some of the devices to a surface that was not prepared/cleaned ahead of time. those devices have no problem sticking to the surface and have not fallen down. They appear to be well secured when we try to tug on them. We would love to see the adhesive strips offered as a replacement item for purchase. We can see down the road people moving devices around, say if they’ve changed their minds about location or if they move. We had also thought about having an extra mount for the motion sensor so we could move the motion sensor between different locations at different times. This was because we were only able to buy a limited quantity due to inventory at that time. But that is something that others might be interested in purchasing at a later date. The motion sensors have been updated to include sensitivity adjustment. They can be pretty sensitive, detecting slight movement even in the dark. We have no complaints. The range and spread appear to be great. The door/window sensor performs equally well. it can be mounted in virtually any orientation and still function so long as the sensor portion of each piece is within about 1/2 of an inch to the other. so you could even mount one of them at a 90° angle to the other. So long as they are within that distance to each other, they still function perfectly. We found this to be necessary with one door where we had a proper clearance on the door but did not have proper clearance on the frame. The products integrate seamlessly with IFTTT. We would love if the temperature/humidity sensor had the option to show more frequently than one hour on the history graph in the app. But the graph is clean, uncluttered and easy to read. We will soon be testing additional products. We are adding additional door sensors and motion sensors to the system, which will then have approximately 20 devices connected. We are also going to be testing for the first time the garage door motion sensor (ordered). We were originally going to test the motion sensor/ garage door opener combo, but none of the garage door openers we have available appear to be compatible. Afterwards, we will test additional devices on our “wish list.“ We have found zero indication of user data tracking, analytics tracking, or communication with ad servers on the app. It really does appear to be simply designed to do what it is supposed to do and nothing more. It’s refreshing. So to summarize, we can’t really find anything wrong. We have struggled to find anything to critique with the devices or the app. Everything works as intended and we are extremely pleased.

I have had several temperature sensors and leak sensors set up in each of three different homes. I have monitored up to 32 sensors at one time. I have leak sensors at all of my plumbing fixtures. I placed temperature sensors in a couple of locations in the house, in my fridge, and in my freezer. This is the best system I have found. It’s easy to update when moving to a new home. I can check status at a glance and can sit notifications on temperature and humidity parameters. I change the batteries about once a year.

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!

Excellent item for warnings on coolers and freezers.

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.