On Thursday 05 March 2009 11:56:39 Robert L Cochran wrote: > Is there an AVR that is especially good for reading data from an > automobile's on-board diagnostic (OBD) connector? Is there already > hardware that can do this: a cable for plugging into the OBD port, and a > board which can read the codes coming from the port? By automobile, I > mean an automobile built for the North American market. I assume that > the OBD connector varies in style and pinout from country to country? > > I know my auto mechanic has a device weighing 25 kilograms with a long > heavy cable terminated by a fat connector that plugs into my OBD port, > reads the trouble codes, and displays them on a screen. That is pretty > much what I want to do, along with intelligent matching of what the > codes probably mean, but I want the smallest possible form factor.
You can get PIC micros preprogrammed to translate OBD to RS232 TTL. http://www.elmelectronics.com/ I bought a clone off Ebay (which I didn't realise at the time). The OBD port is standard (although it can carry a few different protocols) and it must be located within 1m of the steering wheel (or something like that) -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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