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    DWC and USB Com ports

    Duet Web Control
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    • DaveA
      DaveA last edited by

      Is there any situation where the DWC is looking at or opening USB Com ports?
      This seems strange but I have a situation where I'm using the Arduino IDE to work on a project unrelated to 3D printing and am uploading my code via COM4. I can do this all day long until I have DWC running on my Chrome browser. Once DWC is running I constantly get "Access Denied" when I upload. Even if I close the DWC tab I still have the access issue until I reboot the PC. After reboot all is well for hours unless I bring up DWC again.

      Does this make any sense?

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      • resam
        resam last edited by

        Highly unlikely.

        DWC is a web application and should be restricted by your browser.
        I don't see anything in the DWC source code that would try to open a usb or com port (most browsers don't even support this).

        Maybe you have an IP address conflict or some other tools trying to make connections to the same port?

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        • chrishamm
          chrishamm administrators last edited by

          Duet Web Control does not access/interfere with the on-board USB interface.

          Duet software engineer

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          • dc42
            dc42 administrators last edited by

            Are you using an up to date version of Windows? I used to get problems with Windows reporting "Access denied" to COM ports for no apparent reason, but I haven't seen it for more than a year. So I put it down to a Windows bug that has I hope been fixed.

            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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            • Danal
              Danal last edited by

              Cura grabs ports away from the Arduino IDE...

              Delta / Kossel printer fanatic

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              • secretman
                secretman last edited by

                This post is deleted!
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