New WiFi Digital Hygrometer Thermometer 3 Pack H5151, Indoor Outdoor Smart Gateway Room Temperature Humidity Sensor, Wireless Temp Gauge with App Alert, for Home, Greenhouse(not support 5G WiFi)

Excellent product. The function is very nice and allows me to monitor my home temperature and humidity even when I am on the road. I use it in every room including my garage. Set up is simple and fool proof. I have 8 sensors in my home. The app is nicely done, and works very well.

Easy setup, can trend data over time. Just got ever thing setup for wi - fi. Sensors are small about a tenth the size of other brand sensors. Tested remote access outside of home a mile away. Everything works! Nice feature is that you can calibrate each sensor for maximum accuracy to a known source. Cannot do this with common temp/humidity sensors. So you can get all the sensors reading the same. Using this as a remote system when I am away from home. Live at 7,000 ft and it can get cold in a hurry. I have a couple of weather systems and this was easiest to setup for remote monitoring. Data trending is great over a day, week, and month. Gave it 5 stars for easy setup, will see about reliability. Only gripe is you need a magnifying glass to read the manual. UPDATE 1 - Well it has been a week now. Spent a few days in Phoenix away from Flagstaff. Readings are reliable. Still 5 stars. UPDATE 2 - Well I added a second set of sensors and gateway. Now controlling 6 temp/humidity sensors. Called customer service which is a miracle as there a phone number; to see if a second gateway can be added. No problem it can.

The Govee app is pretty terrible. It's usually about five minutes behind on updates. There is a permanent exclamation mark over the wifi symbol, even when it eventually catches up. The app complains if I turn Bluetooth off on my phone, even though there is connectivity via the WiFi hub. Other than the little exclamation mark, which is permanently there anyway, there's no clear visual indication when a device has run out of battery. It just sits there on the dashboard reporting a temperature from a week ago. And the historic temperature feature is a pain to use, as it takes ten seconds or more to load the data, every single time, which gets boring. Oh, and to add insult to injury, the app has ads, so after paying reasonable money for this product, Govee still sees fit to extract a few more tenths of a cent of revenue from me at the cost of my convenience. The devices themselves seem well made, although the battery on one has died after just a couple of months. Perhaps it will do better with a new branded alkaline battery, we will see. In the end, it does the job, sort of, and there doesn't seem to to be anything better on the market, so though the app is fairly grim, I'm keeping the devices. Edit 7/17/2023 This is now working much better, so I added a star. Temperature data is now recent to withing two minutes as soon as I open the app, and the constant exclamation mark over the wifi symbol has gone away (though it does briefly recur every few minutes, for some reason) I didn't change anything. Maybe an app update fixed it. I will also add that what I called 'ads' can (I think) be completely disabled via 'banner' preferences. Viewing historical data is very slow, as I said in my original review. It seems historical data is pulled from the cloud, which I didn't realize at time of my review. I still don't know why that has to be so slow but, anyway, that's something of a bonus feature for me. The core feature of checking temps and humidity around my house is now reliable and fast.

I really like these thermometer/hygrometers. They are quite precise, displaying temperature and humidity to the tenth. The historical data is fantastic as well, as it's easy to look at trends over hours, days, weeks, months, or the entire year. Although I've only had them for a couple months, so no long-term experience yet. Initially, I tried one in the RV freezer, one in the RF refrigerator, and one in the RV living room. Yes, there is an "RV" trend there. We are camping out in the RV while the house is remodeled. Anyway, we wanted to monitor the temps in the freezer and fridge zone to ensure they were cooling to the right levels. And they were. And yes, the signal worked right through the refrigerator doors. The base unit was placed about 15 feet away under the dinette (cause that's where the outlet is). :) As the season progressed and it got much colder, we were more concerned with the temperatures around the freshwater tank and the underbelly area. And we were right to be concerned. The freshwater tank or the feed from the tank to the pump froze when we had the cold snap in early December (Oregon). How do I know it was the tank or tank line to the pump? Well, our RV has a feed hose with a cutoff valve right before the pump. So, I filled a bucket of water, put the feeder hose in the bucket, and ran the pump. Pressured right up and the sinks worked. So, frozen tank or feed line. Anyway, we skirted the RV with cellular foam board, put a small space heater underneath with a thermal switch, and placed the thermostats. One thermostat was hung under the frame in the now enclosed underside of the RV. One in the pump area with all the crazy water lines. And one just outside the RV hanging from an external panel. The lanyards came in handy for that. We were happy to see the underbelly temps come slowly back up above freezing. At this moment (22 Dec 22), it's 36.9 degrees in the underbelly, and 10.4 degrees just on the outside of the RV. And yes, the water unfroze, and everything works again. Yay! We carefully checked for any leaks and were happy to not find any. So, we really like the sensors. They are connected over our home network, so I can check them anywhere, anytime. The Govee app is nice and easy to use, and it's easy to add the devices. I did get one bum battery that died in the first week, but that inconsequential. The others are running strong. And they work fine with our Eneloop rechargeables. Small, precise, and wireless. Good stuff.

I picked up a set of Govee humidity and temp sensors to help me keep my house safer in Jan of 24. I love them, they're great little sensors, they were easy to set up and use. Unfortunately the gateway just up and stopped working a little over a week ago. I contacted Govee support hoping to be able to buy JUST a replacement gateway. Well, they don't sell just the gateway, but... I was a little surprised when they offered to just send me a replacement. Ok, Great. Problem solved. Now imagine how surprised, and very pleasantly so I might add, when they sent me a whole new SET, the gateway and 3 sensors. I will Definitely be looking at Govee to fulfill more of my smart home sensing and lighting needs in the future.