Virtual COM port (VCP) drivers cause the USB device to appear as an additional COM port available to the PC. Application software can access the USB device in the same way as it would access a standard COM port.
Starting with Windows 7 and newer operating systems. Once the cable is plugged into the PC, the FTDI USB VCP Driver should automatically download and install if your PC is connected to the Internet. You can check Windows Device Manager under Ports to see if the driver is installed (Please see image below).
IMPORTANT! - Once the driver is installed you will need to match the COM port assignment the driver creates to that in your application software. In Windows this is found in Device Manager (Plese see image below). Some application software may not work on COM port assignments above # 9. If you experience issues try changing the COM port to a lower number between 1 and 9.
Most issues with the USB to Serial converter adapters/cables are driver installation related. The most common issue with Windows use of the adapters/cables is not matching the COM Port assignment the USB driver creates with that in the software that you are using.
5. Confirm that the software that you are using is compatible with the device that you are trying to connect to. Also, check and see if there a mode or sequence that the device needs to be put into before attempting to communicate.
8. In order for some older software to work with 64bit systems. It needs to be "Run as Administrator" in order for it to work correctly. You can fix this requirement by following the tutorial here: -to/always-run-a-program-in-administrator-mode-in-windows-10/
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