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Vitaliy (obdsol.com) on WIG-09555 - OBD-II UART

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The vast majority of CAN peripherals do not expose the SOF or CRC (although if the CRC is wrong, the STN1110 will append “DATA ERROR”).

This is what the standard request/response looks like:

0100

18 DA F1 10 8 06 41 00 BE 1B 30 13 00

This is 29-bit CAN, with headers (ATH1) and DLC (ATD1) turned on. You can see the CAN Id (18DAF110), DLC (8), PCI (06), and the data (4100BE1B3013). The last byte (00) is padding.

You can expect to see this exact response if you connect the Sparkfun OBD board to an ECUsim 2000.

Vitaliy


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