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Fibaro Smart Implant with DHT-22 sensor


Roberto R.

Question

Hello everyone!

a few days ago I took a smart implant and connected a DHT-22 sensor to it to detect humidity and temperature in a greenhouse.

The Smart implant is powered by a 220-240 V power supply, DC 12V 1.25A, 15W output and is located inside an electrical panel while the sensor is positioned inside the greenhouse.

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Now my problem ... the internal temperature sensor of the smart implant reaches temperatures over 55 ° C even if the air temperature is 30 °.

At midnight tonight the internal sensor measured 35 ° C while the external sensor DHT-22 measured 22 ° C.

This thing seems strange to me also because the operating temperature range reaches max 40 ° C.

In this regard, in fact, the DHT-22 sensor measures the temperature and humidity regularly until the smart implant does not exceed 44 ° C, then flat graph, the DHT-22 stops giving me data.

If I unplug the power and plug it back in for a few minutes then it stops again.

At night, however, everything works perfectly.

What do you think it can be?
Wrong power supply?
Faulty smart implant?

A further test I did was put the smart implant outside the electrical panel, in the open air, the internal sensor still exceeds 47 ° C when in reality it is 30 ° C and the external sensor no longer sends me the data .

Thank you!

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  • 23 minutes ago, Bodyart said:

    I was trying to reproduce the issue with DHT-22 without success...

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    the inner sensor shows 35 degrees while I heated the Smart Implant case to 52 degrees and DHT-22 is showing correct temperature.

    When I disabled the inner sensor i didn't observe any changes.

    thank you so much for the test you did!  

    How did you set parameters 67 and 68?

    I 67 = 1 and 68 = 60

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    Please login or register to see this image.

    /monthly_2020_07/afbeelding.png.e44117a9a20190ea3f02984c7523bd6e.png" />

     

     

    Edited by Bodyart
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  • 8 minutes ago, Bodyart said:

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    same as me, so it's not a problem of settings ..

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    Maybe it's not relevant in this case, but i had to include my Smart Implant twice, because the first time it didn't install all slaves. Do you have all slaves?

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    /monthly_2020_07/afbeelding.png.a661c06a481eea7448e718729e7630b2.png" />

    • Like 1
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  • Nothing, the problem remains even with the internal senor deactivated ... but do you use the external sensor like the one I use or the dht22 without electronic card?

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  • A new update.
    The interruption of data reception does not occur only when it exceeds 40 ° C, today it has also stopped at much lower temperatures.
    If I turn the power off and on again, everything starts working again for a short time.
    Going for exclusion:
    - two smart implants changed, problem not solved.
    - 3 dht22 sensors changed, problem not solved.
    - changed two power supplies, problem not solved.
    - internal sensor deactivated, problem not solved.
    Do you have any other ideas?

     

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  • 26 minutes ago, SmartHomeEddy said:

    Yes,  NodeMCU ESP8266 V2 or V3 opensource WiFi board ?

    Ok, I should take a new access point to extend the coverage of the wifi though .. but now it's a matter of principle ...
    What's wrong?
    How did you connect it?
    What power supply do you use? 12V? more or less?
    What DHT22 sensor do you use? DHT22 or AM2302?
    Why if I unplug the power and plug it back in then it works again?

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    The range with Z-wave is indeed better to handle and extend. And it should work with a Z-wave sensor. Maybe a Fibaro door sensor could do the job, or a Everspring humidity/temperature sensor. 

     

    My sensor is in the garden, I think, haven’t measured, 20 meters away. It connects via WiFi. I use a DIY air quality sensor setup. You can build your own, see 

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    The power supply is a (micro) USB 5V adapter. If you unplug the power and replug the power, the sensor powers down and powers up. With a Quickapp I read the levels every 150 seconds. 


    This is the shopping list: 

    NodeMCU ESP8266 CPU/WLAN

    SDS011 Fine dust sensor

    BME280 6-PIN, temperature & humidity & air pressure or your DHT-22 (I also use a DHT-22 for humidity and temperature) 

    USB cable e.g.: flat 2m Micro-USB

    Power supply USB

    Cable straps

     

    I bought them as a complete set on 

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    . For less money you can buy them separately on AliExpress. 

     

     

    Edited by SmartHomeEddy
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  • Update:

    The temperature of the internal sensor has nothing to do, the report of the values from the DHT22 crashes randomly.

    After a while the reports from the external sensor stop, while those from the internal sensor continue to receive them.
    If I disconnect and reconnect the power supply, everything works again.
    It makes me the same problem even if I connect it on the Fibaro control panel.
    I have already changed 2 Smart Implants and 3 DHT22.
    Here are the graphs.
    Some idea?

     

    Internal Sensor - Temperature

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    /monthly_2020_07/1884988166_INTERNALTEMPERATURE.png.0be2da9f7b580260d8fae790b5bc7cb0.png" />

     

    External Sensor - Temperature

    2141102169_EXTERNALTEMPERATURE.png.de590b82b183354e60bd0e3e7633e6b9.png

     

    External Sensor - Humidity

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    Config

    CONFIG.png.e565b9c737d6bb138784c9f5bb11696c.png

     

    Edited by Roberto R.
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