DWC and USB Com ports
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?
resam last edited by
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?
Duet Web Control does not access/interfere with the on-board USB interface.
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.
Danal last edited by
Cura grabs ports away from the Arduino IDE...
secretman last edited by
This post is deleted!