hn may not be the best place to ask this question. a neural network is almost certainly overkill, and likely too slow for your purposes. you probably want some

hn may not be the best place to ask this question. a neural network is almost certainly overkill, and likely too slow for your purposes. you probably want some additional smoothing. i don't know why FFT doesn't work for you, since this accelerometer data can almost certainly be decomposed properly. a window-based threshold approach is fine in my opinion as well.