Allen,

May I ask what what the purpose of the device will be?  If it's for your own
use, I would definitely go with ELM (see Steve's post).  It's basically a
12C509 chip that translates VPW/PWM into ASCII.  It does a great job -
unless, of course, you have an Asian or European car which uses the ISO
standard.

Vitaliy

----- Original Message -----
From: Allen Demers <farmbooy@IX.NETCOM.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: 01.22.2002 8:14 AM
Subject: [PIC] [EE] OBDII interface


> I did a quick search on the archives but did not find anything relevant.
My question is:  Does anyone know where I can find the interface and/or
protocall used to communicate
> with OBD?  I would like to be able to read and or write to the OBD using
either a PIC or if I have to a PC.  I am just trying to work out what is
needed to do this.  I know there is an
> $80 book available from SAE to do with  OBD, but I dont know what is in
the book and I am hopeing there is somthing available on-line.
>
> Any help would be greatly appreciated.
>
> Regards,
> Allen Demers
>
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