SwitchBotSmart Hygrometer Thermometer, Hygrometer Indoor Humidity Meter, Dewpoint/VPD/Absolute Humidity Sensor, Bluetooth Digital Temperature Monitor with Free Data Storage, 4-Pack

Update: The one sensor that has the display problem is still tracking temperatures accurately. I just purchased another sensor, so now I have 5. I placed all 5 of them together in a room, and the temperatures displayed were all within one degree of each other. Most withing 1/2 a degree. That is definitely good enough for me. Again, the humitidy readings are not near as accurate, but humidity is not an issue for me. So if you are interested in getting accurate temperature readings around the house (or outside the house with the outdoor version), and viewing readings with the Android app or Google Home app, I highly recommend this device.---------These devices work GREAT. I was wanting temperature sensors for different areas of the house, and I couldn't be more satisfied. They were easy to install and add to the Android app, which now clearly displays ACCURATE temperatures.When paired with the Switchbot hub, those temperatures are displayed in real time (no need to tap the device on the app screen to manually refresh). And better yet, the hub allows Google Home devices to verbally respond with those readings.I did notice the LED display on one of the four devices appears to be going partially bad (one number is not displaying completely). But it still transmits accurate data, and I have it in the attic so not really a problem. I might try contacting the manufacturer to see how to replace that one item - I don't want to return all 4 to Amazon since only one has a minor issue.

I have 3 Hygrometer/Thermometers monitoring the temp and humidity in 3 different rooms. They are all connected up to a single SwitchBot hub. No issues so far and everything is working great.- They are all connected to the same hub and I've not seen any connection issues.- I've placed a regular hygrometer/thermometer next to it and the numbers were generally the same, sometimes with a 1 degree/percent difference.- Set up was very easy and reliable. Instructions were correct.- Battery life is good so far - uses two AAA batteries so they are easy to replace. After 2 week of usage, they are all still at 100% battery life.- SwitchBot has an API to their cloud - I'm planning to take advantage of this to archive my data and graph it on dashboard for monitoring.- I have it connected to Google Assistant and it is able to give me readings of the temp/humidity of each room when asked. One odd quirk though is it shows up as an adjustable dial in the Home app. I'm guessing this is more of a quirk of the Google Home app and not the meter since it's not like I can turn the humidity down through the meter. Ha!- The meter can store 36 days of sensor readings - you retrieve these when you are within bluetooth range and open the app. It will connect and retrieve/save the readings on your phone.- If you want it to send the data to the cloud, you need to go into the settings of each meter and set the cloud service to on. It will automatically send the data thru the Hub and you can see the data without having to go refresh the data thru bluetooth.- I've found the sampling resolution to be lower (maybe once every 30 minutes) when using the cloud. It appears to be higher when storing the data locally (about once every 5 minutes?). I've not found docs confirming these numbers so far, so take it with a grain of salt.There are tons of documentation split between their website and in the app. Everything is well written and detailed which is very rare these days.Overall, I've had an excellent experience so far. It works well and makes me want to get meters just so I have more data to in my graphs.

I bought these to monitor the temperature on my first and second floors, outside, and in my Man Shed. They're small and unobstructive. They seem to be pretty accurate and easy to setup. I did have one monitor that had a display problem right out of the box. I had to return the whole set to Amazon to get a replacement. I love the display on the actual units so I don't have to pull out my phone whenever I want to see the temp. However, the range on them isn't great. All 4 devices never connect at the same time unless I'm within 20-30 feet of the units. And downloading historical data stored on the device on to my phone takes a LONG time. All in all, they're a good value for the money and get the job done, but certainly have some room for improvement.