Comments on: inexpensive PIC based OBD-2 interface

By: A-Ride_4_ever

A-Ride_4_ever — Tue, 12 May 2009 22:19:33 +0000

Cliff, The ducati uses a Cann network. ODB II is not supported on it. You can get a rig from dashpro that will not only allow you to read the data from the unit but err write new data say like odometer etc..

By: Vern

Vern — Mon, 28 Jan 2008 00:23:48 +0000

Sofware is free on internet, with search, What I need is something that will write to the obd, so I can do a liottle programming.

By: boltun

boltun — Thu, 29 Nov 2007 10:13:50 +0000

I just tested this on my Nissan Altima. Works like a charm!

By: Jake

Jake — Sun, 11 Nov 2007 16:50:59 +0000

Go here: http://www.mp3car.com/vbulletin/software-software-development/75172-any-open-source-obdii-apps-out-there.html
the last post contains two more links to the same forum , they have some things implemented in VB.

By: joun

joun — Sat, 10 Nov 2007 15:54:18 +0000

If this device works like ELM323 (the author says that it is compatible) would it be then possible to use it with another PIC or Atmel that would request&read data and display it on a LCD display? Is it possible to connect two microcontrollers via it’s USB?!

By: tb0lt

tb0lt — Sat, 10 Nov 2007 03:42:19 +0000

http://www.obddiag.net/multiadapter.html

Isn't this better since it covers 4 common protocols?

If I wanted to do it myself. whats the cheapest option to get the PCB made with the provided data? Thanks

By: Alexander

Alexander — Thu, 08 Nov 2007 20:07:28 +0000

I cannot find any good software for Linux… Anybody got a good source for this?

By: tdweekly

tdweekly — Thu, 08 Nov 2007 17:32:46 +0000

I believe there’s free software out there to interface to these ELM style devices…

By: Doctari

Doctari — Thu, 08 Nov 2007 17:17:55 +0000

This hardware interface only works with a subset of the available OBD-2 protocols. It does not work with J1850 PWW, J1850 VPW and CAN (controller area networks). The CAN interface is now standard on all 2007 vehicles. So before you invest time and effort in this device, make sure that your vehicle has an ISO-9141-2 or KWP2000 interface, otherwise, you’re out of luck.

By: Spaceball1

Spaceball1 — Thu, 08 Nov 2007 08:37:49 +0000

Where the source code?
I like to be able add features.

By: Jim

Jim — Thu, 08 Nov 2007 08:34:54 +0000

@emperor_dane:
using the pic 18f4550 or 18f2550 (40 or 28 pin) to implement a virtual com port is extremely easy. Microchip has sample code on their website that does just that.

@jake:
i only see one fet on the schematic, and like chupa don't see any mc33290 ic. i'm not looking at the gerbers though...

what i want to know though, is where he can get $6 pcbs with blue soldermask and silkscreening at what i'm assuming is prototype quantities. i can get pcbs for $6 bucks but its without soldermask or silkscreen...

By: Stephen

Stephen — Thu, 08 Nov 2007 07:26:51 +0000

This is great. Most solutions have been serial and like the post states, USB options have been pricey.

I've been using the cable from http://obddiagnostics.com/ for a number of years now.

The gentleman that makes this cable also sells the parts and documentation to build your own based on his design.

What's more is this cable is the basis for most open source projects involving OBD. Head on over to source forge and search for obdII.

Thank you for the great find. Also thanks to the hacker for helping people gain control over their cars.

By: smellsofbikes

smellsofbikes — Thu, 08 Nov 2007 07:23:43 +0000

Awesome project. I built an oldschool RS232-OBDII interface from schematics for the open-OBDII project on sourceforge but this is way snazzier.
Digikey carries a version of the Freescale chip and the PIC: MCZ33290EFR2CT-ND $1.65
PIC18F2455-I/SO-ND $8 (DIP)

What a superb project.

By: Chupa

Chupa — Thu, 08 Nov 2007 07:21:09 +0000

@ jake

i looked at the gerber files now and i see it. i just assumed it was DIP before, hence the confusion.

By: TJhooker

TJhooker — Thu, 08 Nov 2007 07:14:23 +0000

I’ve had a hand held unit for a while that I paid $250 for. It handles OBD II and some older protocols.

These are life savers for cars with ECM’s, especially road side.