Optec Home > Astronomy > Downloads > USB-to-Serial Converter > Driver Installation Instructions

Mac OS Installation Instructions:

Click here to download FTDI Drivers for Mac OS

Visit the FTDI website for instructions for installing the USB-to-Serial drivers on a Mac OS computer:  Mac_OS_X_Installation_Guide.pdf


Windows XP Installation Instructions:

Click here to download FTDI Drivers for Windows

  1. Before plugging your new converter into your computer, make sure that any existing old drivers for the FTDI chips set have been removed. Do this by going to the Add/Remove Programs in the Control Panel and find any listing of "FTDI drivers" and remove it. If you have any older USB-to-Serial Converters using the FTDI chip set, you can remove them now.
  2. From the Optec Install disk or from clicking on the FTDI Driver link above, download and run the executable setup program. This setup program is for Windows operating systems: 2000, XP, Vista, and 7. You will not see any message if the program loads successfully.
  3. After running the setup program, you can now plug in one of your FTDI chipset USB-to-Serial converters. To find the COM number that was selected for each USB-to-Serial converter, go to your Device Manager (PATH: My Computer - Control Panel - Systems - Hardware) and check to see the COM port number listed under Ports (COM & LPT). See the diagram above which has COM7 selected for the USB-to-Serial Converter. You can then plug your other converters in one at a time to see which COM number have been selected for those.
  4. IMPORTANT NEW INFORMATION: There have been some recent changes with the firmware installed in the USB-to-Serial converters that Optec supplies after July 2007 that may require an additional computer setting to be modified. If you do not see the COM port number in the Device Manager screen as in step 3, but do see messages that indicated that the USB-to-Serial converter is installed and ready, then the VCP (Virtual COM Port) box must be checked. Examine the image at the left and see that no COM port number has been selected. Open the line item "Universal Serial Bus controllers" and select properties for the"USB Serial Converter" line item. Select the "Advanced" tab as shown in the third image at the left and check the "Load VCP" box. Unplug the USB-to-Serial converter and then plug it back in. You should see the COM port number appear under Ports as described in step 3. This will affect all converters that are connected.