picophil wrote:Good morning
Thank you for the post about CAN bus decoding. This now becomes a interesting subject and most of the data codes you have listed will only be known by the vehicle manufacturers. This is the DNA of the vehicle and all manufacturers will guard this with their life. All we can do is look at the data files and observe.
Thank you for the post.
LM358 wrote:You can recognize OBD2-frames because their identifiers all begin with 7.
Take a look at the following:
A good way to get started is to connect a universal OBD-scanner to the car and read the "live data" with the tool. At the same time, you decode the CAN-frames with your Pico.
Try to catch some OBD-frames (with 7XX-identifier). You can even understand the data (all the info is in the Wikipedia-document).
There is a lot of traffic on a CAN-bus, so it can be difficult to catch the 7XX-frames among many others.
The best way to solve that problem is to built an acceptance filter using a µC.
If you have assembly-programmer skills, I can help you with some software for PIC18F258. I don't speak C+ nor C#.
Good luck - Eric (Belgium).
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