Use of FFT with RAK4631 RUI


I am reading RAK1904 sensor acceleration data at high rate and want to do FFT operation on the obtained data. What FFT library do you recommend me to use RAK4631 RUI ?

Thank you !

Hi @wardzx ,

In our WisBlock Audio, we have different example implementations of FFT.

Most of these are using ApproxFFT. This is not a library but a lightweight implementation of FFT in C code.

Maybe you can have a look and see if it can be used to your acceleration data stream.

Here’s one FFT example -

Please note that the full example itself is not for RUI3. However, ApproxFFT is a C code that you can try to port and implement for accelerometer.

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