So many other 'connected' devices have difficulty with distances. I had a Z-Wave based system that was unreliable because nodes would randomly disconnect due to poor signal strength due to distance or interference (every time it rained, my system went down). YoLink uses LoRa technology which has fantastic range capability up to 1/4 mile and this solves the disconnection problem completely. They integrate Semtech's LoRa RF Module. Everything is ultra low power so sensors can run on batteries for many, many months. The whole YoLink system depends on a YoLink hub, that receives/transmits LoRa signals from/to various sensors and actuators. The hub is connected to the internet through your WiFi or ethernet system. An app, residing on your smartphone, is used to control and monitor all devices connected to the hub and even tells you how each sensors battery is doing. I have several YoLink modules (garage door kit, moisture sensor, motion sensor, siren). They have all been VERY easy to set up. I would say that compared to other technologies (ZigBee, Z-Wave, ...) Yo Link's implementation using LoRa paired with their app has greatly reduced issues with initial setup. The garage door controller kit took all of about 5 minutes to install and test. The garage is detached from my house and is a bit of hike from the house. The LoRa radio shows 'good' signal availability at the hub in spite of the distance. I simply could not have done this with almost any other technology. The app is integrated with with IFTTT which allows you to create smart automations that can integrate with the Alexa personal assistant. This is a very nice capability to have. I had one small issue with the motion sensor (setting the sensitivity) and was really pleased with how quickly and efficiently their technical support dealt with that minor issue. We were having some work done at our house and a contractor had stored material in the garage. I was able to remotely open the garage to give him access to the material and then remotely close the garage when he was finished. The app also warns you when the garage door has been left open after a timeout. If you're the kind of person who worries about whether you shut the stove off, you'll appreciate the YoLink Garage Kit (door position sensor, door opener Controller). The controller is, in essence, an app controlled relay that emulates pressing the button that usually opens the garage door. It's foolproof! The modules are made of good quality plastic and some are even weather sealed (moisture sensor for example). My experience with YoLink has been excellent. The LoRa radio modules do exactly what YoLink says they do: allow communication over long distances that other technologies cannot deal with. Low power is another very critical feature of their modules. It means you don't have to change batteries very often. My system has been ultra reliable and easy to use. I admit, though, that some of the messages that the app shows are not what anyone would call 'grammatically correct English'. Also, the colors (pastel shades) chosen for the graphics in the app are low contrast and difficult to see in bright sunlight. Overall, I give YoLink 5 stars. Great apps, great prices, great support, great features. It just works!

Use these thought the basement and where ever there may be water accumulation. Super easy to install- Only minor consideration is that the hub needs an ethernet cable attached to it. However if you contact their excellent support they will send you instructions on how to use with wifi. I used their support for the first time and they got back to my email with an answer in just a few hours!

The setup for the hub and 4 water sensors was literally only ten minutes. The instructions are very clear and simple. I am so happy with this purchase. I was pleasantly surprised by the easy setup. General Info: 1) I suggest plugging the hub directly into your router for the easiest setup. As soon as you plug the hub into the router it automatically connects and the hub part of the setup is complete. The hub is very small and not bulky at all. 2) You have to download the Yolink app on your phone and then connect the app via wi-fi to your router. This only supports the 2.4 wifi. At that point you just scan a QR Code located on the sensor into the app on your phone and it is paired and ready to go. The sensors and hub use LoRa signal which means the batteries in the sensors last for 5 years and the hub and sensors communicate with each other up to a 1/4 of a mile. In other words at this point it's not using your normal wi-fi signal, it is using LoRa instead. The batteries are replaceable. You take off the 4 silicone pieces on the bottom of the sensors to reveal the 4 screws, take those off to replace the batteries. 3) If you don't want to plug the hub into your router you can make things easier on yourself. Initially plug the hub into your router and pair your sensors. Then unplug the hub from the router and move the hub to your desired location and the hub will have automatically obtained all the info/settings needed from your router so it will make the wi-fi set up easier. I can't imagine why a normal household would need to use the Hub wi-fi vs. just plugging into your router when you have a 1/4 mile range between sensors and the hub. 4) The sensors have no wires and work wirelessly (LoRa) communicating with the hub and are very easy to install. You can install the sensors in any direction because they have tiny water sensors built into the top and bottom. So, wherever the water is coming from, above or below, the sensors will detect it. 5) From the app you can setup multiple ways to receive alerts for free. I have app push notifications, text message and email alerts all setup to trigger at the same time. That offers great flexibility. I want to make sure I receive an alert if I have leaking water in my home so I like having different contact methods in case one isn't working at any given time. 6) One thing they don't mention that I love is from the app you can open your desired sensor and click on the three dots at the top of your screen which takes you to the specific sensor details and you can view the current temperature of the sensor. This is useful for me because I had an AC pan overflow so this way I can see if the temperature in my home is higher than it should be if my AC was running. Basically, I can see there may be a problem with the AC even before the water starts leaking out of the drain pan. 7) The hub can also handle over 200 different sensors connected to it at one time. They have endless types of different sensors so you can make your system as simple or complex as you wish. They even have water shut-off sensors and the app can handle if/then commands such as if any water sensors triggers then automatically shut of main water valve. So, you don't even have to worry about getting notified as your water will shut-off automatically. It's just nice to know you can build this system to endless possibilities.

Update 9 Feb 2021. Customer service support, especially from Eric, has been outstanding. Web-based product description has improved greatly and their suite of products continues to expand with interesting new applications for the YoSmart ecosystem. I have alerts set on all of the components of my YoSmart system, and am impressed to see notices come in on email and smartphone when a component exceeds threshold I set (example house humidity), or the hub falls off the network (example, short power outage). The main issue had been Hub would not stay connected on 2.4 GHz channel on WiFi, and so had to operate as an Ethernet hardwired connection. Today Eric suggested I unplug the Ethernet and move the Hub more than 6 feet away from Netgear satellite station, so I moved it 50 feet away. After about 30 minutes, my app showed that Hub was again "Offline". Perhaps it was offline immediately and just took that long for the update to percolate through the ecosystem and back to my app. *************************************** Now that the Hub and Water Leak Sensors are configured, and deployed and Hub is hardwired to home network (NOT WiFi), I give the system 4 stars for intuitiveness of App, functionality during testing (including sending texts and e-mail messages), and connectivity of sensors with Hub. Customer service was also extremely responsive or I would have returned purchase at end of first week. Post-deployment with replaced Sensor and new Hub would be 5 stars if the Hub had not kept dropping off the 2.4 GHz channel on house WiFi, or if I had not planned on using WiFi to begin with. I have given the purchase an overall 3 stars due to problems with initial Hub setup, a sporadic set of water sensor probes on one of the 4 Leak Sensors, unreliability of the WiFi connection on 2.4GHz, and the delay for YoLink to send a new Water Leak Sensor (new one worked fine) and a new Hub (new one would not stay on WiFi 2.4 GHz channel either). Tech support was were responsive, but shipping took a number of days. Tips covered below: * If something doesn’t go like you think it should during initial set up, contact Tech Support ASAP. It’s not worth your time to try and do trouble shooting with a lack of YoLink FAQs and updated useful YouTube demos. * High Marks to Tech Support responsiveness, though the one time I called they answered the phone just saying “Hello” and not identifying themselves as YoLink Tech Support. * The Hub is designed to only ride a 2.4 GHz WiFi channel and that DID NOT work reliably for the Hub or replacement Hub YoLink sent. Mine is now configured via dedicated Ethernet cable to my WiFi satellite station modem. I have seen other reports on YoLink Hub that had the same 2.4 GHz channel problem. * Once Hub was connected to WiFi via Ethernet, connectivity and reporting with Water Leak sensors at the other end of house and in attic was great, showing strong signal strength. * Configure your Hub to send a notice if the Hub goes offline. * Test all your Water Leak Sensors in the environment where you expect them to work, as well as e-mail and phone alerts. I set Alert Interval to 1 minute with both App alert and e-mail. One set of probes did not consistently alert when tested (worked about 20% of time) and I exchanged with YoLink for a new Sensor. * Pay attention to naming conventions of Hub and Sensors. It will not give an error message if you don’t follow the naming convention (which I haven’t found, just trial and error of what was allowed to be saved). * Check for firmware updates for sensors and Hub on the App’s “Detail” page. * I like the battery-low-warning feature, but only time will tell if it actually works as designed as the battery life winds down. - Problems began immediately out of the box. The instructions are by no means complete and there is no place to find out the cause and fix of error messages. A couple of YouTube clips are short and go too quickly to completely understand what feature on the App was touched. - The YoLink HomePage FAQ had no questions, just preformatted form fill information. - The first step, “Binding” the Hub to your App (making it part of your “ecosystem”) produced the following error when I pressed the “Bind Device” bar in App: “Error The device has been bound” . Way too much research to try and figure out what this error meant and how to clear it. Finally I emailed YoLink. I actually got a fairly timely reply. Basically, the devices get bound when being tested before being shipped, and YoLink failed to unbind the device before shipping. So Tech Support “Unbound” the Hub for which I had provided the serial number. Once Tech Support Unbound the Hub from their location, I was able to Bind it into my YoLink ecosystem. Lost a day and a half on that. - On to WiFi connect problems (never resolved with 2.4GHz channel). I have a Netgear Orbi base plus two satellite station router with both a 2.4 GHz and 5 GHz channels and a separate back channel. I have other devices on both channels and none have ever had trouble finding an appropriate usable channel. While the Hub would connect fine using the ethernet connection on the router, it was not my intent to use the last ethernet-connection on the master station for this Hub. When I unplugged the ethernet connection and attempted WiFi, it immediately detected the network name broadcasting and I entered the password. When I attempted to connect, the App eventually errored out with an error notice that said “Connect Faild”. I called Tech Support and they apologized and said I need to do the WiFi set up while it is still connected via ethernet (this is not in the instructions either), admitting that it should connect just fine to the 2.4 GHz channel. I did that, finally connected Hub to WiFi and removed the ethernet connection. Things were fine until I went to test the water sensors and they were not sending alerts when sitting in water. Turns out the Hub fell off the WiFi (and I had not turned on the alert to let me know Hub was offline). NOTE: DURING ALL OF THIS CONFIGURING AND TESTING, THE HUB, ROUTER, PHONE/APP AND WATER SENSORS WERE ALL WITHIN 2 FEET OF EACH OTHER. Once I reconnected ethernet to Hub, alerts began coming to the app and my email, both which I had selected. - The Hub and Water Leak sensors can be given unique names and assigned to unique room names. I found that renaming the Hub as "Hub #1" was a non-starter. The naming convention would not accept the “#”. This was a trial and error discovery. The naming function also went stupid and would not accept a space at the end of the name I entered accidentally, along with special characters within the name. No error or notice….just would not save the name until I corrected the name to comply with the unknown naming convention. A "Space" within the naming conventions was fine, just not at the end. - All Sensors and Hubs required Firmware update. You have to search for that in the devices’ Detail page. Updates were all completed within about an hour. - I double checked the Water Leak Sensors and subsequent Alert notices. I laid a wet paper towel across each of the three sets of probes (two sets of probes on the bottom, one set of probes on the top), one set at a time. I watched for the Water Leak Sensor red alert light on the Sensor and waited for alert to come to phone. On the four water sensor modules I bought, one set of sensors on the bottom of one Water Leak Sensor did not consistently come on (about 80% of the time no red alert light and no App alert to the phone). I returned that Sensor and YoLink promptly sent a new one which worked properly. - After testing all sets of probes on the Water Leak Sensors initially with a wet paper towel across the pairs of probes, I tested them on the actual surface I will deploy them on. These Sensors are deployed to the attic on the plywood floor. What I found when testing on a piece of plywood was that a steady drip-drip away from the probes eventually ran around the probes and the probes were apparently submerged in a thin layer of water and set off the probe light and alerts. If I just wet the plywood and let it soak in and then put the Sensors on wet plywood with no more dripping, none of the Sensors alerted. Since that’s not the scenario with a leak that would wet the attic plywood I deployed them. But it’s smart to actually test them in exactly the scenario and material you want them to perform…not just with a wet paper towel. - YoLink send me a replacement Hub because the original Hub would not consistently stay on the 2.4 GHz channel even sitting 2 feet from the router. The replacement Hub would not stay on WiFi either. The Hub is now Ethernet connected to a satellite on the WiFi network (using a NetGear Orbi Modem with a master and 2 satellites). I have turned on the alert to tell me when the Hub is offline, which is how I knew it was falling off and getting back on many times over a few hour period when I was connected via 2.4 GHz WiFi channel. - Both email and call to Tech Support (California) were VERY responsive. At some point that frequently stalls in companies and if YoLink doesn’t substantially improve their printed and access to YouTube instructions, their own in-house procedures before shipping, WiFi connection problem, and FAQs, I expect customer satisfaction will fall off.

Being an electronics engineer, I am more often critical of such systems, but these designers are smart. The sensors are designed well, solid, and very reliable. Most importantly the range is superb. They advertise 1/4 mile to make it sound like a long way, but frankly that is 1300 feet without barriers. Still, I get great signals on all 12 of my water leak sensors throughout a large home. I experimented by placing one sensor in a lawn sprinkler box which is 1 foot underground and about 500 feet from the hub. Still, the signal reports "Good". The gate sensor also works great. Also, the price is decent considering the technology. It is purported that the batteries will last several years. I am a bit doubtful because a typical alkaline battery will have about a 2 or 3 years shelf life even with no energy being used. I noticed the batteries are cheap no-name brands. I'll see how long they last. Replacing them in the water sensors can be a pain since you would have to dig out a tiny little rubber dot in all 4 corners with an ice pick just to get to the also tiny screws. Not a quick or easy task. The only thing I wish was better is the app. It has some design fallacies I don't like. Example. To create an "automation" that allows a water leak sensor to send an alert to my phone or to the sprinkler, I have to create an automation for each of my 12 water sensors. It would be nice to allow attaching all sensors (of the same type) to just one automation so it will be easier to edit if needed. That brings up another point: There is no way to review the settings of an automation that I can find. So how do I know what is the behavior of a setting? No way to review or edit one. To make a change, I have to delete a behavior and recreate a new one. the app forces to enter a password or use face recognition every time I open the app. Frankly, if I have to enter a password to get into my phone, then I don't want to have to do it again every time I open the app. There should be a way to ignore doing it for situations of no security importance. Bottom line is that the combination of the app and hardware work well and work reliably together. It is also very fast and really easy to set up the devices to sync with the app. Nice job overall. I look to use some of their many other devices.

We have notoriously bad luck with water incidents at our new home. We had 2 separate occasions where water leaked through the ceiling from an A/C drip pan overflowing. We also had an issue with a slab leak in the kitchen. You would think after those incidents I would've invested in water sensors....but no. It wasn't until I woke up on Christmas morning to my entire house being flooded in 3" of water that made me finally come to my senses and order water leak sensors. For the Xmas incident, the water inlet valve under my kitchen sink came loose overnight and managed to flood the entire house in a matter of 5 hours. Had I had a leak sensor under the sink, Christmas wouldn't have been ruined and my house wouldn't have had thousands of dollars in water damage. So now I have water sensors on anything that has the potential to leak water. All the sinks (kitchen, bathroom, laundry room), all the AC drip pans, the water heater, the toilets, the washer and even the fridge and dishwasher. The Yolink system is incredibly easy to install. It took me about 20 minutes to pair all the sensors with the main hub and do the wet checks on them as well. I recommend labeling each sensor with its location (i.e. kitchen sink) that way you don't get confused on what goes where (if you're pairing a bunch of them). The app works great and you can set up a room, then the sensors that will be in that room. You can also favorite a sensor or sensors so that they show up on your dashboard on the app, allowing you to monitor the sensor for battery life or activity. You can also sign up for email and text notification if a leak is detected. Additionally, these make a very noticeable audible noise that can also be modified for duration and alert intervals. The app also keeps history logs of any incidents that the sensors experienced. Lastly, the range on these is amazing. I haven't had any issues with these being out of range (even in the attic) or going offline. To test each of these, I paired them all then set them on a wet paper towel. They immediately made a high pitched beep and send a corresponding email and text. To test the top sensors, I just used a dropper and put a drop of water on the top which yielded the same results. If you are a homeowner I cannot recommend these enough. In hindsight, I wish I would have installed these everywhere to avoid heartache, stress and thousands spent in repair.

I bought the kit that came with a hub and four leak detectors. I bought, additionally, the temperature & humidity sensor and two motion detectors. I bought these for a second house that is not always occupied. Setup was incredibly easy - I connected the hub to power and one of the network ports on my router, then immediately setup the wifi in the app and moved it upstairs away from the router. Connectivity over wifi works great. The Android app works well and all the settings are easy to find. One thing worth noting - it does NOT support the 5G wifi band (it warns you of this in the app), so if you have separate SSIDs for 2.4G and 5G make sure you use the 2.4G one. I then connected all my sensors by scanning the QR codes on them with the app. I recommend connecting all your sensors first before creating any "rooms" or automations as you can do it in bulk once you get your sensors scanned in. The only reason I deducted a star was poor QA. The water sensors all operate off two AAA batteries each, and in one of my sensors the batteries were flat dead. I tested them - not low voltage, flat out dead. They are garbage chinesium batteries so while I am not surprised, this should have been caught before the sensor was packaged and sent out. Replacing the batteries was easy enough - four tiny screws were hidden under the feet on the bottom and the device opens in two halves, and you can pop in new batteries once opened. Based on other reviews, these batteries tend to last years so you might not ever need to do this. When I had the unit apart I had the opportunity to take a look at the mechanisms. The main PCB was of high quality, and all the soldered components were stout. There is a very nice gasket/seal that runs around the perimeter of the sensor to keep water out - meaning that even if the sensor were completely submerged I suspect it would not be damaged beyond use once dried out. I have not used any of the automation features, but it looks like they sell an automated water valve you could use to shut off your water if a leak were detected, for example. It also integrates natively into Alexa, Google Assistant, and IFTTT. Again - I did not use any of these features but if you've messed with any of those before you know what to expect. If you don't know what any of that means, don't worry about it. Overall I am very pleased and I will be purchasing more sensors for this setup. The Android app is easy to use and the added peace of mind is great. I highly recommend the YoLink systems.

Review Summary - Awesome I recently purchased the YoLink Hub and Water Sensor pack on Amazon and the YoLink 3/4 motorized water/gas valve shut off from their direct site.  All products worked fantastically. I was not thrilled with the idea of yet another hub in my Smart Home but the reviews (and no availability of SmartThings water sensors) led me to try YL and I am so glad I did. I love this brand now: set up was faster than zwave/zigbee, works without internet, and flawless integration with Amazon's Alexa.  5 Stars hands down and another 5 for the future - make sure to follow them on FB. Below are some other things I would like to share.  When to buy water sensors - Every time someone shares a wet story A couple of years ago, my cousin's house flooded after his girls filled the sink with water (washing their face like they down in the movies) and then left for school... He had to live at my parent's lake cottage for the winter (~3mo) in upstate NY.  Family of 4, dog, and cat in a 2 bedroom ranch with no laundry.  At that time, I decided that since their deductible was $500, I was going to spend that much on a solution: a dozen ST water sensors and a Dome bolt-on valve control. Every time I have a water issue, a close call, or hear a story about someone who had an issue - I buy a few more.  The latest was a co-worker whose parents went to Florida for the winter.  Apparently, a bird died in their HVAC exhaust pipe, slide down, and errored out the furnace (CO2 protection feature). Since they had no smart devices to warn them about the cold house, the pipes burst and no one knew.  When they came back 3 weeks later... eww.  That's when I found and joined the YoLink system!  Use Cases - Start low in each room I am not a plumber or insurance claims agent: these are just my thoughts that work with my house. I first started out with 1 water sensor in each bathroom. I put them by the toilet with the thought that if a sink also had an issue, at some point it would make it out of the cabinet and onto the floor and get to the sensor.  It won't help with small leaks that will just go through the cabinet and into the floor/ceiling etc, but it's a start since water damage can happen almost anywhere.  You can always go back and add another to each room (see above "when to buy").   I had an issue where my hard water was leaving sediment in my washing machine's solenoid causing it to stay in the open position.  We came home to a door-open front-end machine almost ready to spill over.  Now we have a sensor in the laundry room.   We had high water pressure in our house which was causing our on-demand tankless heater pressure relief valve to started to let out a steady stream. We had a sensor there to cut off the water and save the day. I now have a pressure regulator (WATTS) and water e-treat (WATTS) system! Speaking of which, not that I don't trust my plumbing work - but the areas I was working with, I put a kids snow sled under my work when I was done to collect any water and put a sensor in it.  No leaks BTW!  Speaking of the sled to collect water - I use decorative square planters to put my bedroom and living room humidifiers in during the Winter with a water bud in each. Last winter, the side of one of the humidifiers broke and messed up my living room hardwood floors.  I use a shoe/boot tray for the cat's water fountain and a sensor just in case they knock it over.  I actually do the same with my hot-water tank too - ensures it will hit the senor and buys a few minutes between the valve shutting, water leaving the system (pipes above), and someone to get there.   Last Thoughts I am excited to build on the YoLink system, I plan on picking up an alarm and some of their other unique products coming out - smoke alarm, CO2 alarm, outdoor alarm, outdoor motion sensor, outdoor contact sensor, etc.  Pretty exciting stuff. BTW, I was not paid in any way for this review, and I am not new to the smart home space - I use everything in my house Tuya, ST, LIFX, Hue (which sucks - Paul Hibbert is correct on that) so I am not just blown away with the novelty of this, I think its a great brand that has a lot of potential with the LoRa.  

This is a review of the 4 sensor with hub and no audible alarm. Very easy to set up - plug the hub into your router LAN port, connect the power with provided USB cable and power adapter, install the app. Using the app, scan the QR code of the hub and then you're ready to add each device by simply turning it on and scanning the QR code on the device through the app. Worked flawlessly for all 4. The app seems intuitive enough to use, and can be configured for whatever kind of messaging you want -- eMail, SMS, and push notification to your phone. Tested all 3 modes and works fine. The sensors themselves can detect water being sprayed on top ( 1 sensor) as well as pooling water underneath (2 sensors). Through the app, can also see the battery level on all sensors as well as connection status. Only thing is the range probably isn't anywhere near 1000 feet in reality. May be sufficient to cover garage and outdoor shed perhaps, but couldn't work when I put a sensor inside my neighbor's house across the street -- too many walls for signal to go through. Anyway, works in all rooms of my 2-story house, so I'm very happy with the product. Hope I never get a message from it!

I bought the YoLink starter kit (Hub + 4 leak detectors) in Nov 2023. It advertised a 2yr warranty & features long battery life (~1yr batt life with 2 AAA batteries). I used only 2 leak detectors initially and finally In June 2024 I started another one. This one failed to start up. I contacted the YoLink support email and described what was happening. Within ONE DAY they responded with instructions on how to troubleshoot the sensor - internal battery was dead - and committed to replace the sensor if the instructions could not fix the sensor. Within a short time I had the sensor working (with new batteries). And that SAME DAY Amazon notified me that they had processed a partial refund covering the cost of the batteries. I now have a 115v Smart Plug w/Pwr monitor, and 4 Temp + Humidity sensors connected to that same Hub. All of my sensors are working reliably, and the internal batteries seem to be lasting as long as they claim! Excellent products & an excellent/responsive support team!