What are the different filters I can use for filtering accelerometer data?

Low pass butterworth filter is providing a crude filtered output. In case a finer/more accurate output is needed, which filter should be used?

Answer 1

[Star Strider]

The Butterworth is a good choice, because of its flat passband and stopband characteristics. I would use a bandpass filter rather than a lowpass filter, since you can eliminate the d-c offset and low-frequency baseline drift with the low-frequency cutoff, and the noise with the high-frequency cutoff.