HT1 Smart Temperature Sensor and Humidity Sensor – Bluetooth Thermometer and Hygrometer with App Monitoring – Indoor/Outdoor Temperature and Humidity Monitor for RV, Basement, Fridge & More (1 Pack)

This can save the day
After loosing two freezers full of food, I decided I needed a sensor that would work in a freezer in the bay of my motor home. After having two different ones that worked on a freezer and refrigerator, different brands, and not working underneath in a compartment, I decided to try the Sensor Push. Amazing! I am not a technocrat, and having read some of the review about lack of documentation, I went for it. Received in one day, opened the box, unpacked it, looked at the documentation … yep, 4 pictures. Picture 1 Smart phone with ICON for play store and ICON for app store. Simple. Opened Samsung Galaxy S10 and downloaded and installed the app for Sensor Plus. Picture didn’t say Sensor Plus, but after experience with 300 plus other apps, it is normal to push the mic button and say the name of what you have in your hand. Sensor Plus! Nice. Downloaded and installed in seconds, which looked like the second picture. 3 picture looked easy enough … answer yes to allow location and turn on bluetooth. Picture 4 … this is the hard part, a picture of the sensor appeared on-screen and said to place the sensor over the picture. Just like that we are hooked up and connected to blue tooth. From there, no more pictures in the booklet. But, looking at the phone the screen showed the name of the sensor (I changed it to represent the location it would be used), next temperature with a little line with MIN and MAX, with an option for an alert. I want to know when the freezer changes from it’s normal 0 degrees to 15 degrees, which allows me time to pull off the road and open the compartment and take investigate why the freezer has changed, before things start thawing above 32 degrees. Same option for humidity, which I skipped quickly by, and then options to calibrate temperature and humidity. They were already at room temp, so until I found an oven or other thermometer to use to calibrate, I left factory temps alone. Hit the done sign, and placed the sensor in the freezer. Waited and watch the temperature of the sensor start to drop. Closed freezer tightly, closed the compartment, and took a seat outside with no metal around about 20 feet away. Neat, Hit the name of the sensor and two graphs … one for temperature and one for humidity. Both falling as the sensor started getting cold. Watching over time, I can see where the temperature starts to rise, and then the compressor kicks back in and the temperature starts to drop one again. Would I buy one again! Of course, now the wife wants one inside the refrigerator as well. Since we normally have wifi when traveling, I ordered one more sensor for the refrigerator and the gateway sensor, so when we stop and leave the coach unattended, we will know if any issues develop. Great product and I expect the second sensor and the gateway to be of the same high quality standard. Will update if any issues.Batteries … should last 1 – 2 years under normal warm conditions, so since the sensors will be refrigerated and frozen, I ordered a 5 pack of CR2477s for insurance. Amazon will ship anywhere we go, but until we find out exactly how long the last under extreme conditions, I’ll carry enough to get me to the next required battery change and order more.UPDATE: Bought second sensor and G1 Gateway. This was too easy to hook up. 11 days and no more lost food. All components work well together and with the Gateway, food temps can be monitored while away. So far battery in sensor has dropped to 2.7v in 11 days, this is definitely in extremely cold freezer. Gateway is 20 feet away and monitoring two sensors without issue. Will buy another set for the house. These work well in a motor home surrounded by metal and all kinds of electronic components.

good

Configurazione semplicissima, connessione senza problemi, misurazioni attendibili, insomma un ottimo prodotto. L’app potrebbe essere migliorabile, in particolare per la possibilità di zoomare di cui anche altri hanno lamentato la mancanza, e il refresh dei dati che non è sempre immediato, ma il customer care (tempestivo e disponibile) mi ha confermato che ci saranno evoluzioni. In ogni caso, volendo informazioni dettagliate, c’è una comodissima funzionalità di export dei dati che permette di leggere tutte le singole rilevazioni in formato tabellare (e, volendo, quindi, costruire grafici personalizzati con un qualsiasi foglio elettronico tipo Excel)Il costo non è irrisorio, ma ciò che mi ha convinto è che si tratta di un sistema espandibile all’infinito e gradualmente: la maggior parte delle stazioni meteo non professionali supportano al massimo 3 sensori ed hanno comunque un costo significativo per fornire i dati su uno schermo nella maggior parte dei casi LCD o in qualche caso a colori ma comunque piccolo e primitivo, mentre questo sistema consente di partire con un solo sensore e già beneficiare dello schermo di uno smartphone (o di un laptop esportando i dati), e poi via via aggiungerne altri secondo necessità, eventualmente corredati dal modulo web per poter accedere direttamente da laptop anche da remoto. Se si mettono insieme queste considerazioni con il fatto che il sensore è preciso, affidabile e compatto, dal mio punto di vista è difficile pensare a una soluzione migliore

(April 2019, 2 YEAR update! – Both sensors are still going strong, with a battery voltage of around 2.8 volts (I thought the battery lasted only 1 year? double that, and no sign of low battery). One’s in the work office, and one’s in my bedroom, over 600,000 readings for each. The app works fine with this much data on the Android system, and the CSV files export fine into Excel. NO crashes, NO needing to remove/insert the battery, not once, The Android app’s never crashed. These ARE expensive, but I got what I paid for, and they do that very very well.)The device is simple to get started with – you download the App for Android, or iPhone, run it, and drop the thermometer block on your screen for a few seconds.That’s it.Whenever you open the program, it reads all the temperatures and humidities that were collected since the last sync up.There’s a new “Sync station” that picks up all your devices temperatures, and sends them to the gadgets website – where you can see them.It uses your existing WiFi network to send the data to the website, and the Low Energy Bluetooth connection between the WiFi and gadget.Info (pros):The battery lasts 1 YEAR, and can be replaced easily (no screws, just a plastic card like a credit card).The device can store AT LEAST 20 days of temperature and humidity – MORE if the temp doesn’t change often, as it only stores temp changes and their date/time.You can CALIBRATE the device (instructions on the website).You can EXPORT all the readings your phone has picked up as an Excel compatible CSV file.You can give each sensor a name.The syncing distance is as good as claimed – it syncs across my house.(Cons):Temperatures are lost when it’s re-calibrated.£50 at time of this review… Oww! . (But if you want “It just works!” – this is the device for you)The device IS NOT waterproof. But you can put it in a baggie.No direct-to-PC syncing.(For devices scattered around the house for example)