That looks great! I love the Teensy, btw. So did you buy a bunch of the blue tire afterwards?

I was thinking about using an ESP32 and streaming the data wirelessly to an iOS/android/desktop app rather than logging into an SD card.

A few questions:

1. Did you find the data useful and actionable?
2. Was the workflow fast enough to be useful on a regular basis?
3. What was your data sampling rate?
4. Did you do any other comparisons? For example, comparing other setup changes or experimenting with different driving styles?
5. Did you try mapping the physical track layout with the IMU data? I know there are issues with the data drifting due to double integrating the IMU noise but curious if it looked useful at all.
6. Did you try monitoring your throttle/steering input by relaying the esc/servo data lines through the Teensy?

Love what you put together!

Lastly, thanks for sharing testlogger. Looking into it a bit.