Activity Forums Questions & Troubleshooting Hardware DHT22 and Controllino Maxi AUTOMATION

  • DHT22 and Controllino Maxi AUTOMATION

     pg067 updated 2 years ago 5 Members · 6 Posts
  • mat1996

    Member
    January 29, 2019 at 2:11 pm

    Hello everybody,

    Today I make a project on a controllino maxi automation. I have an issue because I would like to use a humidity/temperature digital sensor DHT22 from adafruit.

    My problem is that this sensor is digital and operate in 0-5 V and the digital input in the controllino is in 0-24V.

    I was thinking that if I amplify the signal with an oeprationnal amplifier it should be working, but maybe some of you would have better Ideas?

    Thanks you very mutch !

  • ivan-controllino

    Administrator
    January 29, 2019 at 2:18 pm

    Hi mat1996, I moved your topic to the Questions & Troubleshooting forum, just that you know. Regarding your issue, you should get a reply shortly

  • mr-controllino

    Administrator
    January 29, 2019 at 2:22 pm

    Hello mat,

    You have to connect 5V things to the pinheader!

    We have a tutorial on how to connect a DS18x20 sensor to our CONTROLLINO on our homepage.

    The sensors are not very different.

    regards

    Marco

  • pg067

    Member
    February 26, 2019 at 1:01 pm

    I have the same problem but with the pinHeader 5v it ok and work fine.

    When i put the 24V in, the sensor goes to-127deg ?

    I do not understand why ?

    Some other ideas ?

    Thank you very much for the help.

    Best Regards.

  • Lukas

    Member
    February 26, 2019 at 3:30 pm

    Hello,

    can you share your setup (how all the wires are connected) with us, please?

    Do I understand it right that everything works fine when the CONTROLLINO is supplied from USB only and goes wrong when you connect external 24V to the CONTROLLINO?

    Thanks!

  • pg067

    Member
    February 26, 2019 at 5:08 pm

    Hello,

    Ok i found the problem…

    The cable must be isolated because there is an interference.

    Maybe with a shielded cable.

    The controllino is in an electrical cabinet installed an the sensor cable go with an cable bundle.

    So, after test, there no problem anymore. maybe it is for that.

    If not i will come back.

    Thank you all for assistance and quick response ! :)

    Have a nice day.

    Best Regards.

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