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  3. Wiring plain DHT22 chip

Wiring plain DHT22 chip

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  • solaS Offline
    solaS Offline
    sola
    wrote on last edited by
    #1

    Hi All,

    As a MySensors noob, I ordered a standalone DHT22 chip (4 pin) instead of a module (3-pin) - didn't notice the difference.

    I found a wiring diagram on the Adafruit site (https://learn.adafruit.com/dht/connecting-to-a-dhtxx-sensor) which seems to use a plain DHT chip like myself.

    Is this wiring OK for the Mysensors library? Will it read the sensor the same way as from a module?

    Any help is appreciated.

    S 1 Reply Last reply
    0
    • solaS sola

      Hi All,

      As a MySensors noob, I ordered a standalone DHT22 chip (4 pin) instead of a module (3-pin) - didn't notice the difference.

      I found a wiring diagram on the Adafruit site (https://learn.adafruit.com/dht/connecting-to-a-dhtxx-sensor) which seems to use a plain DHT chip like myself.

      Is this wiring OK for the Mysensors library? Will it read the sensor the same way as from a module?

      Any help is appreciated.

      S Offline
      S Offline
      sundberg84
      Hardware Contributor
      wrote on last edited by sundberg84
      #2

      @Andras-Soltesz - Hi and welcome Andras!
      No problem, wire the DHT like the link and use the Mysensors sketch (https://www.mysensors.org/build/humidity) and everything will work out fine!

      Just note that data input on the arduino uses D2 on the adafruit link but standard defined is D3 for MySensors.

      Controller: Proxmox VM - Home Assistant
      MySensors GW: Arduino Uno - W5100 Ethernet, Gw Shield Nrf24l01+ 2,4Ghz
      MySensors GW: Arduino Uno - Gw Shield RFM69, 433mhz
      RFLink GW - Arduino Mega + RFLink Shield, 433mhz

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      • solaS Offline
        solaS Offline
        sola
        wrote on last edited by
        #3

        Thanks, I will try it out.

        1 Reply Last reply
        1
        • solaS Offline
          solaS Offline
          sola
          wrote on last edited by
          #4

          It works, many thanks.

          I used a 4K7 resistor as pull-up and it seems to be enough.

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