this post was submitted on 13 Aug 2023
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My car doesn't have a reliable km/h gauge so I used an app to poll the speed of the car and show it up on my phone exactly in the way you described.
A GPS speedo would work too.
A device talking to satellites in space is less exciting than some wire going to the engine 🤔
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.
Are we twins?
would be cool if we are