Many generic USBSerial converters are unable to handle the baud rate and timing requirements that are demanded by some control modules using the VAG protocols. Notice the 15 female pins? That is a Monitor port and will not work! Observe the port circled and crossed in RED. Notice the 9 male pins? That’s a Serial port. Observe the port we surrounded with the GREEN oval. Obviously a serial interface requires a Serial Port which looks like this: If you’re using a PC running an older version of Windows or with a CPU speed of less than 1GHz, we recommend a Serial interface. Although USB interfaces are no faster than serial versions, it’s becoming increasingly difficult to find new PCs with serial ports, so a USB interface is more future-proof. If you’re using a modern PC running Windows XP or newer, then you should probably get a USB interface. This depends primarily on the PC you’re planning to use:
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