OBD 2 drive lib ?

[Peter]

I'm looking at buiulding an ISO OBD-2 <-> RS232 interface such as this
one:

http://www.scantool.net/parts.htm#elm320

...and want to do my own labview software. Does anyone know of a
instrument driver for this application?

(Aside: OBD-2 is the serial interface standard for autocar computers,
you can use it to get ont he fly data such as speed and also error
reports.)

[ebarker]

Funny, I actually built a stand-alone OBD 2 error-reading device for my senior design project in college using a PIC microcontroller to communicate with the Elm chip. If you want to use LabVIEW and don't necessarily need a stand alone device, I would recommend that you split a serial cable - connect the DB-9 end to the RS-232 on the vehicle and then wire the outputs to the Elm chip that you have on a breadboard. All you really need is a way to read the signals of the Elm chip and then transfer them into your PC. For this, the NI 6533 digital I/O board should be sufficient. The PCMCIA flavor would make the application a bit more modular than the PCI flavor. You can then use LabVIEW to program this board. You could also wire a digital output from the 6533 to the
Elm to trigger reading data off of the serial to vehicle connection. That should be about all you need. Good luck!

[geodinko]

Hello,

Well I don't have an answer to this question, but I successfuly built the above mentioned hardware interface for my Subaru (ISO) and am not really satisfied with the freeware software available on the net. I will be writing a Labview application to read and clear the codes as well as getting the live sensor data...
If you want to colaborate on this project please contact me at dacimo@hotmail.com. We could help each other...

Dinko Acimovic
Hardware Designer
Zarlink Semiconductor

[Kevin Valentine]

I purchased a RS232 to OBDII adapter from Multiplex Engineering some time ago. Here's their site:
http://www.multiplex-engineering.com/interfaces.htm

I would like to get it working with LabVIEW (Linux and Windows). I worked on it several months back and I certainly want to pick it up again. Let me know if you're still interested. I can talk to Jim Kring of OpenG.org. He'll give us a project page so we can share
our insight and libraries with others.

I find that the biggest obstacle is getting access to the commands. There's an OBDII book out there by SAE but it costs $100+. If you need info on command structure here's another MuxEng link:
http://www.multiplex-engineering.com/tech/manual/

Did you ever get a reply from the original poster?


Sincerely,
Kevin Valentine

PS: I just looked at Scantool.net. Very, very cool. I noticed they provide the source code:
http://www.scantool.net/freesource.htm

[AJvZ]

that is awsome, I've been eager to start programming for ODBII for quite a
while now and I even have the $100+ manual. Just not the time (yet). please
keep me up to date.
Aart-Jan


"Kevin Valentine" wrote in message
news:506500000005000000DA230100-1042324653000@exchange.ni.com...
> I purchased a RS232 to OBDII adapter from Multiplex Engineering some
> time ago. Here's their site:
> http://www.multiplex-engineering.com/interfaces.htm
>
> I would like to get it working with LabVIEW (Linux and Windows). I
> worked on it several months back and I certainly want to pick it up
> again. Let me know if you're still interested. I can talk to Jim
> Kring of OpenG.org. He'll give us a project page so we can share
> our insight and libraries with o
thers.
>
> I find that the biggest obstacle is getting access to the commands.
> There's an OBDII book out there by SAE but it costs $100+. If you need
> info on command structure here's another MuxEng link:
> http://www.multiplex-engineering.com/tech/manual/
>
> Did you ever get a reply from the original poster?
>
> Sincerely,
> Kevin Valentine
>
> PS: I just looked at Scantool.net. Very, very cool. I noticed they
> provide the source code:
> http://www.scantool.net/freesource.htm

[Kevin Valentine]

Wow, I guy that has the book. This IS getting interesting. Is it this book:
http://www.normas.com/SAE/pages/HS-3000-03.html

If you get a chance, check out OpenG.org and become a registered user. The NI forum isn't the greatest place for this kind of stuff. Below is my obfuscated email address. Send me an email if you want to get more involved.

kevinvalentine [at] netzero [dot] net

[Kevin Valentine]

I set up a project page on OpenG.org
http://openg.org/tiki/tiki-index.php?page=On%20Board%20Diagnostic%20-%20OBDII

What do you think of the ugly logo? The discussion forum will be coming soon.

-Kevin

[AJvZ]

yes, it is that book, allbeit the 1999 edition
I also have the SAE book on the J1939 protocol (used in trucks) and an
introductionary book on ODBII "getting to know ODBII" isbn 0-9706711-0-5
($60=)
I yet have to start reading in any of them, but I will definetly be able to
provide certain information


Aart-Jan



"Kevin Valentine" wrote in message
news:506500000005000000E3230100-1042324653000@exchange.ni.com...
> Wow, I guy that has the book. This IS getting interesting. Is it this
> book:
> http://www.normas.com/SAE/pages/HS-3000-03.html
>
> If you get a chance, check out OpenG.org and become a registered user.
> The NI forum isn't the greatest place for this kind of stuff. Below is
> my obfuscated email address. Send m
e an email if you want to get more
> involved.
>
> kevinvalentine [at] netzero [dot] net

[Kevin Valentine]

Hi Aart-Jan,

Sounds like me. I tend to get interested in many things. Sample here and there, and then dive in later on. Well, no one has to dive on this project. Jim Kring has set up a discussion forum on OpenG.org and I just posted an opening discussion. Here's a link:

http://www.openg.org/tiki/tiki-view_forum.php?forumId=23

(make sure to click on the "Opening OBDII Discussions" link, no need to start a new topic just yet)

The purpose of the forum is to generate ideas, questions, solutions to those questions, and provide a permanent log of all this information. The project page is a place to store all our collaborative work for all to use.