Quote:
Originally Posted by geraldjust
i actually got TPMS out of the can data from these cars. But its not as simple as sending some bytes and getting the return back. I can give ya a hint. its basically how Multi-Frame Message. If you google that you will get a semi aquatineace on how it works.
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BTW responses should be in 0x758
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This is a great pointer!
We would all
really appreciate it if you could just share the exact request / response protocol.
I'm going to add it to
my GitHub anyways, but you can just save everyone some time
I promise to read more into the details of how Multi-Frame Messages work!
I find "learn by studying an example" to be more effective than
"learn by first solving a puzzle that requires you to already know what you want to learn to solve it".
Also curious if you've confirmed if the same message format is working on the 2022 cars.
Quote:
Originally Posted by Pat
Have you guys ever compared TPMS readings with readings from a high-quality traditional gauge? [...] But I think it's important to recognize there can be significant inaccuracies in them.
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Totally. I definitely wouldn't rely solely on them, but they should give you a ballpark trend how much your tires gained in PSI since the start of the session.
Quote:
Originally Posted by geraldjust
Keep in mind that the sensors are Absolute pressure
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Interesting data!
Quote:
Originally Posted by geraldjust
yeah i was worried about that too. but the sensors have a .5psi resolution
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I have seen two different sensors at the exact same ambient conditions reading 2–3 psi off each other,
even though the same pressure gauge measured the same pressure from both tires.
So "0.5 psi resolution" doesn't necessarily mean "0.5 psi precision".
But again, as long as you can see the general trend...
Quote:
Originally Posted by geraldjust
So i made mine also check temp too.
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This is perhaps even more interesting to log!