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Difference between revisions of "Connecting scanners via USB"

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Revision as of 10:44, 2 December 2008

With the lack of serial ports on newer PCs these days, having to connect to a USB port is a necessary, but sometimes frustrating, evil. Unfortunately sometimes ports aren't available when you think they are, or everything appears to have installed correctly, but still doesn't seem to work. Here's a little checklist of steps to use;

  1. Use Device Manager to determine if other COM ports are available, and not held by Bluetooth or other devices. Sometimes such devices will hold an address even if it's not actually in use (Figure 1).
  2. Install USB drivers. Figure 2 shows one possible result. At this point you need to validate if your application can actually address the COM port that has been assigned. If it can't...
    1. In the 'Ports (COM & LPT)' section of Device Manager you should see an entry that reads something like 'Serial on USB Port (COM 15)'. The actual text will vary with the driver's documentation
    2. Select the Serial Device Entry in the list
    3. Right click on it and select Properties
    4. Select the Port Settings tab and click on the Advanced button. Change the COM port address.
  3. Connect the adapter
  4. Connect the cable from the scanner.

All of this assumes that you have first set the COM port of your scanner up to the transfer speed you desire. Sometimes a scanner will register as 'not available' until this procedure is completed. It's beyond the scope of this article to detail this, as it tends to vary. Often this is detailed in the back of the owner's manual. If you don't have one, it's very likely a PDF version of the manual is available from the distributor or manufacturer's website, or sometimes on the Yahoo group that covers your scanner.

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