[fc417fc802]

That's an interesting point but consider that bandwidth is also limited when we're talking about an always on system that's in every vehicle sold. And until recently storage was remarkably cheap.

If you log 32 bytes once per second that's only 962 MiB per year uncompressed. But 32 bytes is a lot (or depending on what you're logging not very much), once per second is almost certainly more frequent than necessary, and almost all vehicles spend the vast majority of their time turned off.

For example logging RPM every 100 ms, 8 bits gets you reasonable but not perfect accuracy and you're looking at 300 MiB per year of continuous operation. It's just not much of a storage requirement for quite detailed telemetry.

[aaronbeekay]

Yah, but automakers are very cost-sensitive, and flash memory/NVM is one of the easiest places to penny-pinch. I get crap about 2kB payloads.