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Replying to @josecastillo

napkin math: a motion event is 15 seconds of data logged at, say, 25 Hz.
14 bits × 3 axes = 42 bits ≈ 6 bytes
6 bytes × 25 Hz × 15 seconds = 2.25 kB. Round up to 2.5 with some timestamps/headers.
2 MB ÷ 2.5 kB = 800 pieces of training data I could log on one chip before dumping.

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