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    Heater & DHT22 issues after updating to 3.4 firmware

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    Duet Hardware and wiring
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    • dc42undefined
      dc42 administrators @A Former User
      last edited by dc42

      @arnold_r_clark try reducing the M307 R parameter, for example to 0.4 or 0.35.

      Regarding the DHT22, is it a genuine one? See https://docs.duet3d.com/en/User_manual/Connecting_hardware/Temperature_connecting_DHT#choosing-a-dht-sensor

      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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        A Former User @dc42
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        • dc42undefined
          dc42 administrators @A Former User
          last edited by

          @arnold_r_clark please share your config.g file.

          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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            A Former User @dc42
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              jay_s_uk @A Former User
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              • dc42undefined
                dc42 administrators @A Former User
                last edited by dc42

                @arnold_r_clark the code has changed in 3.4.0 firmware and DHT11 support has been removed, but DHT22 is working for me on MB6HC spi.cs1:

                09a9e182-7482-4b14-aea2-1414c302694c-image.png

                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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                  A Former User @dc42
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                  • dc42undefined
                    dc42 administrators @A Former User
                    last edited by dc42

                    @arnold_r_clark have you connected a pullup resistor between the DHT22 signal wire and the +3.3V supply to it? I have a 10K resistor connected to mine.

                    We don't currently support any other humidity sensors, but we may support BME280 in RRF 3.5.

                    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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                      A Former User @dc42
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                        A Former User @A Former User
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                        • dc42undefined
                          dc42 administrators @A Former User
                          last edited by

                          @arnold_r_clark that looks OK so I don't know why it isn't working. Which country are you in?

                          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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