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Checksum erros

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  • undefined
    ronnien59
    last edited by 7 Dec 2016, 15:15

    Can anyone tell me what is causing the checksum error.

    I have received several pointing to a different line:
    line 187
    line 197
    line 1228
    line 1459

    I am using the PanelDue I have not connected to the DuetWiFi using S3D yet but I do not think it will change.

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    • undefined
      Dougal1957
      last edited by 7 Dec 2016, 21:11

      What are you doing to generate those errors?

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      • undefined
        ronnien59
        last edited by 7 Dec 2016, 21:43

        I was homing X, Y, and Z

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        • undefined
          Dougal1957
          last edited by 7 Dec 2016, 21:45

          Strangew never had that David should be along before to long to answer only time I have had it ever is once when doing a grid compensation run

          Doug

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          • undefined
            dc42 administrators
            last edited by 7 Dec 2016, 22:37

            Checksum errors occur when the MCU on the Duet is too busy to service the serial port interrupt in time, or the serial buffer fills up because too many commands are queued, or there is interference on the serial port wires (perhaps because the PanelDue cable is routed right next to a stepper motor cable). They should occur less frequently using recent (e.g. 1.16) versions of firmware compared to older versions.

            When a checksum error occurs the command concerned will be ignored. This is usually of no concern because most commands sent by PanelDue are status requests, and PanelDue will send another one before long.

            If you get a lot of checksum errors, reducing the baud rate (keeping the same value at both ends) will reduce them.

            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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            • undefined
              ronnien59
              last edited by 8 Dec 2016, 20:57

              I have 1.15c release in my PanelDue. Is there a later release? I will move my cable and see if this helps.

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              • undefined
                dc42 administrators
                last edited by 8 Dec 2016, 23:05

                Version 1.15c of PanelDue firmware is current.

                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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