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Tiny desktop thermometer/hygrometer with display - SNZB-02D - interior and pairing

p.kaczmarek2 3741 34

TL;DR

  • Sonoff SNZB-02D is a tiny temperature and humidity meter with a 2.5" display, measuring 62.5x59.5 mm and running on a CR2450 3V battery.
  • It pairs with Home Assistant through Zigbee2MQTT and exposes temperature, humidity, battery level, and connection quality entities.
  • The teardown found a BU9792FUV LCD controller, Puya P25Q80H Flash, and a C224HG/EFR32MG22 Zigbee SoC, plus an unspecified humidity/temperature sensor.
  • The meter costs about PLN60 locally, works well with Zigbee2MQTT, and the battery-powered design cannot extend Zigbee network range.
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #31 21397785
    jarekgol
    Level 40  
    @Nargo why are there 85 in the first line from the middle?
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  • #32 21397788
    Nargo
    Level 23  
    The sensors didn't have time to register. And I didn't care about refining the code as I was interested in the spread of values.
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  • #33 21409501
    Anonymous
    Level 1  
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  • #34 21409508
    SławekSS
    Level 24  
    Depending on the car, you can extract most of the data from the controllers , mainly those with CAN communication.
  • #35 21414679
    @GUTEK@
    Level 31  
    VPSA132 wrote:
    I own something similar:
    Smart temperature and humidity sensor with display, operable via smartphone app. .
    I think I need to throw it in here.
    It's worked great for two years now. Works on AAA rechargeable batteries and on batteries.
    That week I replaced the rechargeable batteries for the first time after two years.
    .
    I bought one now, I was depending on AAA power.
    And unfortunately I find that it has a tragic range! Where any knefel still has an LQI above 30 it no longer works completely. In practice, this thermometer only correctly sends data to me being a floor below the antenna, in the rest of the house not.
    Strangely enough there is a ZTU module inside so it should have a good range.
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Topic summary

✨ The discussion centers around the Sonoff SNZB-02D, a compact temperature and humidity meter with a 2.5" display, powered by a CR2450 battery and compatible with Home Assistant via Zigbee2MQTT. Users share experiences with similar devices, including the Sonoff SNZB-01P and various Xiaomi models, highlighting their performance, battery life, and integration capabilities. The conversation also touches on the importance of range and stability in Zigbee devices, with comparisons made to Bluetooth alternatives. Users discuss calibration options, firmware updates, and the accuracy of readings across different models, emphasizing the need for reliable data in smart home setups.
Generated by the language model.
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