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Wi-Fi temperature and humidity sensor - 4 out of 5 do not connect, blue LED on

stasiek37 153 14
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  • #1 21539932
    stasiek37
    Level 10  
    Hello.
    I have a problem with a Wi-Fi temperature and humidity sensor, it does not want to pair.
    Out of the 5 sensors I bought 4 I can't pair, The blue LED on the fifth one lights up red and it found the device with no problem.
    AI: What exactly is the model and manufacturer of these sensors? .
    Aliexpres.
    AI: What app or method do you use to pair the sensors with Wi-Fi and does your network operate on 2.4 GHz or 5 GHz? .
    Smart life.
    Attachments:
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  • #2 21541710
    techlock
    Level 29  
    When pairing, enable GPS on the smartphone and grant access for the app, without GPS it will not pair.
    The sensor only works in the 2.4 Ghz WiFi range.
    Check the power supply batteries for nominal voltage of 1.5 V.
  • #3 21541723
    stasiek37
    Level 10  
    >>21541710 >>21541710 .
    GPS, Wi-Fi and Bluetooth on, I also took turns doing different configurations.
    Batteries new, I checked with others too.
    Router supports 2.4 GHz - one sensor works on the same.
    Ideas have run out.
    The puzzling thing is the colour of the blue LED....
  • #4 21541727
    techlock
    Level 29  
    Check the pairing instructions for how to trigger a reset, there should be a button on the pin, probably press for 5 sec.
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  • #5 21541730
    stasiek37
    Level 10  
    I reset, no change.
  • #6 21541735
    techlock
    Level 29  
    Specify the exact model?
    You probably have the BT (Bluetooth) version and it will only work over BT.
    There are different versions, Wi-Fi and BT only.
    For pairing the LED should blink rapidly.
    If it's the BT version then turn off Wi-Fi, LTE, leave only BT on and pair.
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  • #8 21541748
    techlock
    Level 29  
    Take a photo of the board from the battery side. In the instructions on page 1 will be the model name, e.g. Model: TH01
    From the link it looks like the sensors should work over Wi-Fi, that doesn't mean they sent you the model you ordered, maybe you got the model for ZigBee.
  • #10 21542293
    techlock
    Level 29  
    It is not clear from the pictures what model it is. Disassemble the case and take a photo of the board.
    Try manually selecting the device type when pairing.

    Screenshot from an app showing different types of temperature and humidity sensors to select during device pairing. .
  • #11 21542518
    stasiek37
    Level 10  
    By hand
    Information label on a box with product and manufacturer details for a temperature and humidity sensor. also tried, I am sending the model
  • #12 21542783
    techlock
    Level 29  
    If you can't enter pairing mode (fast blinking LED) then it comes out that the sensors are factory defective.
    If you bought from this link, make a return on ali, the system will generate a free return label, send back the faulty goods and you will get your money back from ali. As a reason for return write that you no longer need it, if you choose the reason damaged, you will have to attach some photos, videos, etc. and it will only complicate the return process.
    Reading the comments from the link other users have also received defective ones. Good advice, read the comments before you buy.
  • #13 21554199
    stasiek37
    Level 10  
    Write down what is the specific model under wifi
  • #14 21554427
    techlock
    Level 29  
    Model: TH01 supports WiFi such a search, e.g. pl.aliexpress.com/item/1005005234605015.html
  • #15 21554534
    stasiek37
    Level 10  
    Thanks to
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Topic summary

The discussion concerns Wi-Fi temperature and humidity sensors purchased from AliExpress, where 4 out of 5 units fail to pair despite the blue LED being on. The sensors operate exclusively on 2.4 GHz Wi-Fi and require GPS enabled on the smartphone for pairing via the Smart Life app. Batteries were confirmed new and at nominal voltage. Attempts to reset the sensors using a pinhole button were unsuccessful. It was suggested that some units might be Bluetooth-only versions, which require different pairing procedures, but the purchased units appear to be Wi-Fi models without a visible reset button on the battery side. Photos of the sensor boards were requested to identify the exact model, as some units might be ZigBee versions or factory defective. The model TH01 was identified as a Wi-Fi compatible sensor similar to the ones linked. The consensus is that non-pairing sensors are likely factory defective, and a return through AliExpress with a free return label is recommended. Users are advised to check product comments before purchase due to reported defects.
Summary generated by the language model.
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