To correct the problem, contact the manufacturer of the serial driver to obtain an updated driver. This problem is only known to occur with some third-party serial drivers. This adapter is designed for connections to cellular phones, PDAs, digital cameras, modems, or ISDN terminal adapters through your USB port. The USB to DB9 provides a connection between an available USB port and the more traditional RS-232 serial port found on many devices. This first one is from Microsoft and says in part:Ī serial driver should return SUCCESS synchronously for all read requests that can be immediately fulfilled with data that is currently present. The Sabrent CB-DB9P USB to Serial converter is the perfect solution for transferring data from a PDA or digital camera. Here are some links to information about the error 8020 – error reading comm. They produce an "error 8020 – error reading comm. Remove the USB Serial Cable from the USB port and run the Windows 7 installer, which can also be found in the Windows 7 Folder.Īfterward connect the USB Serial Cable back into a USB port and it should appear clean in Device Manager.Ĭons: The Windows 7 64 bit drivers provided on the CD do not work. Pros: There is a newly updated Windows 7 64 bit driver available from Sabrent tech support.įor Windows 7, you may need to first run the Driver Remover application, which can be found in the Windows 7 folder below.
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