ThermoPro TP357 Digital Hygrometer Indoor Thermometer of 260FT, Bluetooth Thermometer Humidity Meter with Smart App, Room Thermometer Humidity Gauge with Temperature Humidity Sensor

Fantastic little device for tracking temperature and humidity in your greenhouse.
I was kind of skeptical this would work given the price but it is amazing. It tracks the temperature and humidity in my greenhouse. I can check it from inside the house. It has allowed me to fine tune the heating in my greenhouse by monitoring temperature fluctuations over the course of the day. It is easy to use, was relatively easy to connect to my iPad (I suggest doing the initial set up with your phone, tablet or computer in close proximity. After that you should be able to check it from a distance.) The signal can’t be accessed from the front of my house (which would require the signal to pass thru a wooden greenhouse wall, an external porch wall and an interior house wall that is tiled) but if I move within about 20 feet in my house, it will update with no problem. For the price and functionality, I am very happy. It’s been running for about a month and has used less than 1/2 the battery, which given that it continuously tracks temperature and humidity, seems pretty good. It sits on a shelf in my greenhouse but also has a way to hang it from a nail or hook.

Well worth the money
At the end, it is all about how it fits your need. For me it was worth the money and I even bought another device like this for around the house.It ended up saving me time and allowed me to get value out of it from the start. The money was well spent, and the device performance is acceptable so far. In the past I was hesitant to buy these type of devices because of cost. I was lucky this device does what it advertises (long battery life, up to 1 year log storage, small size, and a commonplace AAA battery type.My use case is to track humidity and temperature for filament used for hobby 3D printing. I wanted to build the device myself (temp, hum, and pressure, all read over BLE, with an e-paper display and all!), but as time went by, I could not find the time to finish my ‘project’ within budget and hobby-time constraints. This device allowed me to start tracking filament use/storage life today, while I could still keep dreaming of my own device (because this product does not sense barometric pressure). Now that I use it, I dream of using a raspberry Pi to read this BLE device automatically (yes, adding another project to my pile of ‘unfinished projects’)My only downer so far is that the Android app does not allow me to save or export the data. It is not even available in the user space memory of the phone, so I can not easily extract it from the app. While I can see the plots in the app, I want to be able to save all the data to a file for later comparison. I will need (yet) another project of mine to use a Raspberry Pi to read all the data and save it. It would be nice if they update the app to at least save all the data to a file in the Android app folder, so we customers can copy it.Hope this experience helps others.For some of the comments I read, I think I know some of the answers:- The location access the app needs is because Google improved Android security awareness, and since Wi-Fi and BT/BLE scanning can be used to locate your device, the message will say ‘location’ because the app you are trying to use needs access to the BLE scan function to be able to find any of these sensors you own that are near your phone.- The 10s refresh-rate should be independent of the speed at which the sensor stabilizes to the exposed environment (response-time). I agree the manufacturer is pushing the limits of misleading by stating “10 s Fast Response” where ‘response’ and ‘rate’ are not quite synonyms. In any case, typically these devices take some time to settle due to lack of proper air flow, etc.

Bought a few and was so pleasantly surprised how much I liked them, I purchased some more. Just a simple little thing but it works great, and even comes with a battery. The App that goes with it is fabulous too.. You can see all the info easily and can export it.A NOTE re: the BATTERY – for those ppl having trouble with the included battery not working, make sure you take off its plastic covering before use. It’s really thin and hard to see that the battery even has a plastic cover all over it. Would explain why so many are complaining about it not working.

This little gadget is super handy and easy to use! It’s lightweight, making it convenient to carry around and check temperatures and humidity in different parts of the house. The app (I use the ThermoPro Sensor app for iOS) is simple and works flawlessly so far.App Highlights:* History Tracking: The app keeps a record of all measurements and lets you monitor multiple sensors at once (take a look at the app screenshots I captured).* Custom Alerts: You can set individual alerts for each sensor (both temperature and humidity) on your mobile phone or directly on the device.* Data Export: Export up to 2 years of data in CSV format (with readings every minute) – great for tracking or analyzing trends.Accuracy:I’m not an expert, but I compared its readings with other devices (see photos comparing a thermostat for temperature and a humidifier monitor for humidity). It seems pretty accurate for the price.Battery Life:I’ve been using this device for about a month, and the battery is still nearly full.One Small Issue:It doesn’t measure humidity below 20% very accurately and only shows 10% or 20%, with no numbers in between.Overall, it’s a great value for the price and does a solid job for everyday use!