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Multiple DHT22 possible?

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Duet Hardware and wiring
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  • undefined
    wilriker
    last edited by 26 May 2018, 19:35

    As the title says: Can I connect more than one DHT22 to a Duet Wifi and how (mainly data line)?

    Manuel
    Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
    with probably always latest firmware/DWC (incl. betas or self-compiled)
    My Tool Collection

    1 Reply Last reply Reply Quote 0
    • undefined
      dc42 administrators
      last edited by 27 May 2018, 05:38

      As it happens I did some work yesterday on the DHT sensor support, with a view to supporting multiple sensors in the next release.

      Duet WiFi hardware designer and firmware engineer
      Please do not ask me for Duet support via PM or email, use the forum
      http://www.escher3d.com, https://miscsolutions.wordpress.com

      undefined 1 Reply Last reply 28 May 2018, 07:51 Reply Quote 0
      • undefined
        wilriker @dc42
        last edited by 28 May 2018, 07:51

        @dc42 Cool! No hurry from my side though. It was more out of curiosity and the fact that I have a few of them laying around than the actual need. 🙂

        Manuel
        Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
        with probably always latest firmware/DWC (incl. betas or self-compiled)
        My Tool Collection

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        • undefined
          dc42 administrators
          last edited by 28 May 2018, 08:45

          I have implemented multiple DHT22 sensor support in my latest firmware build, however I have only one DHT22 so I can't test it.

          Duet WiFi hardware designer and firmware engineer
          Please do not ask me for Duet support via PM or email, use the forum
          http://www.escher3d.com, https://miscsolutions.wordpress.com

          undefined 1 Reply Last reply 28 May 2018, 08:48 Reply Quote 0
          • undefined
            wilriker @dc42
            last edited by 28 May 2018, 08:48

            @dc42 I can test it as soon as it is released. Another question out of curiosity: how many can the Duet handle? I only have two but who knows what I am going to do in the future?! 😁

            Manuel
            Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
            with probably always latest firmware/DWC (incl. betas or self-compiled)
            My Tool Collection

            undefined 1 Reply Last reply 28 May 2018, 13:30 Reply Quote 0
            • undefined
              dc42 administrators @wilriker
              last edited by 28 May 2018, 13:30

              @wilriker said in Multiple DHT22 possible?:

              @dc42 I can test it as soon as it is released. Another question out of curiosity: how many can the Duet handle? I only have two but who knows what I am going to do in the future?! 😁

              They will use the same pins as the temperature and PT100 daughter board chip select pins. So if you have no daughter boards, the maximum number you can connect to a Duet 2 WiFi or Ethernet will be 8.

              Duet WiFi hardware designer and firmware engineer
              Please do not ask me for Duet support via PM or email, use the forum
              http://www.escher3d.com, https://miscsolutions.wordpress.com

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