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A comment on Show HN: Cantools – an extensive set of CAN bus tools. Parent comment

Re:Show HN: Cantools – an extensive set of CAN bus tools by cjohnson318 on Tuesday January 14, 2020 @10:35AM (#22045685)
I don't think you can pull a DBC file off of a vehicle. I think you have to build the DBC file yourself by reverse engineering everything--you'd monitor the CAN network, and then turn the light on and off, sit in the driver set, etc. The DBC file is the car's secret sauce.
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Re:Show HN: Cantools – an extensive set of CAN bus tools by zro on Tuesday January 14, 2020 @10:46AM (#22045823)
There's also at least one repo [1] of DBC files that have already been reverse-engineered by the community

[1] https://github.com/commaai/opendbc

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