Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - New project (using OBD-II to USB cable that uses LM339 and FTDI chips for interface?)

guill_ · 07-11-2012, 06:47 AM

Anybody??

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.

07-11-2012, 06:47 AM	#2 (permalink)
guill_ EcoModding Lurker Join Date: Jun 2012 Location: Madrid, Spain Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts	Anybody?? 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.