If I am not mistaken, 0x5E means a sleep duration of 1s. When the accelerometer wakes up from sleep, it will take 3 (0x02 + 1) samples, and go back to sleep if the threshold is not met. The movement would be easy to miss. There is another alternative for using BMA2x2 to wake up on any motion, that is the combination of high-pass filter and high-g interrupt.
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