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Old 07-11-2012, 05:47 AM   #2 (permalink)
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I have been researching but I don't know exactly how to search this things because I don't know what I'm looking for. It seems that the interface I have on my cable can be connected to arduino. The FTDI chip converts USB to RS232, is that right?

Then I don't understand the main function of the interface. It takes the OBDII data and convert it to RS232? To use the VagCom sofware I had to set USB port as a virtual COM port.

Please help me! I can't get Freescale chips to build the interface. The circuit of this interface is very simple, but I don't know anything about ISO/Serial/Usb protocols.
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