Smart Digital Thermometer Hygrometer, WiFi Indoor Temperature Humidity Sensor with App Alerts, Mini Room Temperature Meter with Data Storage and Export, Compatible with Alexa. 4PCS
$39.99
Price: $39.99
(as of Nov 05, 2025 22:08:54 UTC – Details)
How to Change to Farenheit?
1. Please transfer the ℃ to ℉ on the Smart Life App.
2. Please use the needle in the box to press the hole at the bottom of the temperature sensor for Twice. Then, it will display Farenheit.
How to Create Routines?
Please create it through Smart Life App. It means it only support to connect with Tuya Smart devices. The routines can’t be created through Alexa App.
Smart Digital Thermometer Hygrometer, WiFi Indoor Temperature Humidity Sensor with App Alerts, Mini Room Temperature Meter with Data Storage and Export, Compatible with Alexa. 4PCS
Package Dimensions : 5.59 x 2.99 x 0.67 inches; 7.05 ounces
Item model number : TH02 Pro
Batteries : 2 AAA batteries required. (included)
Date First Available : June 4, 2025
Manufacturer : Zecamin
ASIN : B0DWSF9558
Best Sellers Rank: #25,567 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #113 in Indoor Thermometers
Customer Reviews: 4.1 4.1 out of 5 stars 198 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
【LCD Display and Accurate Measurement】Note: Please use the needle to press the hole twice to change C to F. It is a Smart Thermometer Hygrometer equipped with high-definition LCD display, ensure better and quickly readings of temperature, humidity information. With ±1℃ accuracy in temperature from -10℃~50℃ and ±5 % in humidity from 0-95%.
【Smart App Alerts】 You’ll receive an instant alert once the temperature or humidity is out of its preset range. Know the status of your bedroom, baby room, wine cellar, basement, plant nursery or other areas, even when you’re not beside the device.
【Compatible with Alexa】The smart temperature and humidity detector can work with Alexa. You can get the exact temperature and humidity data through your voice. Note: The temperature data will not be displayed on Alexa App.
【Support Smart Scenes】Establishing a connection between the smart temperature and humidity sensor with other your smart devices, such as, humidifier, air conditioner, to turn on them automatically. Such as, To turn on your humidifier when the sensor detects room humidity below 50%.
【Easy to Place】 The wifi temperature humidity sensor’s design fits in the palm of your hands. It’s small enough to fit in potted plants, cigar humidors, reptile vivariums, and other small spaces. Meet your needs for any corner.
Customers say
Customers find the thermometer works perfectly and consider it good value for money. The temperature display receives mixed feedback, with several customers reporting inaccurate readings and the unit displaying only Celsius. Customers appreciate the WiFi connectivity, with one mentioning easy integration with Alexa. The device’s size receives mixed reactions, with several noting it’s very small, while battery life and ease of setup are also mixed aspects.
13 reviews for Smart Digital Thermometer Hygrometer, WiFi Indoor Temperature Humidity Sensor with App Alerts, Mini Room Temperature Meter with Data Storage and Export, Compatible with Alexa. 4PCS
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$39.99
Rob –
Good for the price but press it QUICK twice!
Not bad for the price. I don’t need super accuracy so the fact that all four of the units sitting together on my living room table vary within a half degree of each other is ok. I wanted to monitor the greenhouse I just assembled out in the back yard to see the difference from outside. I can also see the temp difference between my lower and upper floors in my house. My thermostat is downstairs and it’s a challenge to keep it comfortable downstairs without baking the Hell out everyone upstairs. Not that these will solve the issue but I can at least see the numbers. Anyway, I recommend these for anyone who might be curious like me and isn’t concerned about high accuracy.I should mention that I had trouble changing C to F like many other reviewers even after following instructions to “push the button twice with the pin”. That is the correct method but it has to be 2 QUICK pushes.
friendtricia –
What’s the temperature in YOUR bedroom??
These babies are great to track your room temperatures using your smart assistant. How convenient to just ask Alexa, “what’s the temperature on the balcony?” We have them in several rooms and outdoor living areas. They were easy to connect to our Alexa network, and they just plain work. We’re very pleased with our purchase.
Amazon Customer –
Easy setup, DOES display in Fahrenheit, but not completely configurable.
Setup is pretty quick and painless with Tuya app. However, these will NOT work with Tuya local, if that is important to you. These are TH02 sensors, not sure if they could be directly integrated with Home Assistant.They update at a 30m interval. Connectivity seems good, 2.4ghz wifi.Lots of people seem to have complained about the F vs C display. The trick is to double click the button to switch between. The directions are not clear about this- but it is super easy once you know to double click, not click twice.One thing to note, is that the sensor actually operates in C, so even though the display can be in F, it is just an approximation of C at 0.5 degree increments. Size is good for visibility. Not sure about battery life, though they do transmit battery level so you should be able to see when they are running low.Overall a good value, I ended up buying a second set of 4 to fill up the house.
Kevin K –
Inaccurate
Not great. The temperature is several degrees off and the humidity is about 10-12% off from a different unit that I have. Even though this was really cheap, donât spend the money. Oh, and the unit only displays °C. Completely useless to me.
Simone Musso –
Very good!
Small and works as advertised
Sty –
Very small LCD, stuck in metric, and updates kinda slowly through the internet.
The device is a ‘TH02 Pro’, which is a generic Tuya enabled device (TH02, ‘pro’ for the LCD). Thus, you can use this with services and apps that are in some shape or way compatible with Tuya. So, you can use this with not just the ‘SmartLife’ app (just a reskin), but with Tuya proper, and then be able to pair it with third-party and/or open-source services… but it’s not that ideal.Critically, this device connects to the internet and updates its measure every hour (perhaps as low as 10 minutes?) to save on battery life. This really makes it useless if you want to remotely check on it on-demand, which is something the Americans in the chat will do because the LCD will not set itself to fahrenheit no matter how much I try.||| (For those interested in brute-forcing it: the ‘Set’ page is in the navbar at the bottom of the screen as ‘Setting’ once you tap the device card — the device card shows you a page that attempts to shows you a historical graph, which never does for me, just a singular data point in time — the Settings page implies that at pairing the device should have copied globally set settings at account creation. I had set my account to fahrenheit, the device is shown as having been set so in the app, but the LCD never updates.)This thing has BLE, but it might as well be used as a means to use the device without setting up WiFi because I’ve never gotten the app to visibly use it and read status changes faster than the aforementioned interval window for WiFi.For those searching the keyword ‘Home Assistant’ (and/or ‘Tuya’), yes, this does appear via the Tuya integration (the device type being a recent addition it seems). It had the tendency to hang, timeout, and culled by HA when initializing when I added this device for the first time. Issues like this may go hand in hand with the aggressive power management, such as the inability to pair this with LocalTuya since it is not a device that is on the network to actively poll (you can search Github on this).Bottom line: Buy this if you’re want the IoT function and are okay with the Chinese ownership/inherent privacy issues (ik ik, pick your government of choice to be ‘spied on’), and the Chinese business operating style (how their apps are made, how quickly they’ll drop support of products, etc). If you’re not interested in data-logging, (some form of) remote logging, app use, buy anything else in this site as it will be cheaper and the LCD display bigger than this miniature thing.
MDW –
Wifi temp monitor.
The Smart Digital Therometer Hygrometer works great. I use it as a wifi pool water temperature monitor. I’ve used a larger battery pack to get longer life and reduced how often I’ve had to replace them.
Duke –
Perfect
Device is exactly as described. Connecting to my Wi-Fi router was virtually automatic. Readings can be calibrated through the app. Device exceeded all my expectations.
Sres Olmedo Martin-Viveros –
Lo compré para medir la temperatura de la nevera y va como un tiro, funciona a la perfección
Carlos S. –
Werkt perfect en is heel betaalbaar. De software werkt heel gaaf.
Doc –
Ottimo e funzionale. Alexa è in grado di leggere solo la temperatura, Google Home sia la temperatura sia l’umidità . Perfetto con Home Assistant.
M. D –
4 in pack. 3 work but one refuses to
M.Z. –
Funktioniert top ohne Zusatzgeräte im normalen 2,4Ghz WLAN Netz. Zum Betrieb braucht man die App Smart Living aus dem Play Store. Das anmelden im WLAN ist Teilweise etwas Langwierig. Zum Zurücksetzen braucht man die mitgelieferte Nadel. Batterien waren schon drin Mal sehen wie lange die halten. Aber einmal angemeldet liefert der Sensor zuverlässig Daten die auch Recht genau sind. Leider kann man den Messeintervall nicht ändern, scheint Stündlich zu sein.Damit sehr gute Sache um die Temperatur eines Raumes aus der Entfernung zu überwachen. Hat man auch noch ein Klimagerät oder Heizkörper der auch Teil der Smart Living App ist, kann man Automationen erstellen.Somit tolles Gerät für einen Fairen Preis