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(lemmy.ml)
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this post was submitted on 13 Aug 2023
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Gps is a standard, anyone can do it. ODB2 is a mishmash of vendor spesific magic dust, and trap doors. It is impressive if you find a device that handles any car.
The basic ODB2 stuff -- which includes the speed readout -- is a standard mandated by the government. It's stuff like being able to talk to other modules over CANBUS that's manufacturer-specific.