Heart rate sensor MAX30102

[richard]

I think Richard is eluding to a process called Fast Fourier Transform

been there done that.

post#53 i have tried many variations , the added aggressiveness of the filter is an attempt to remove the unwanted "little" peaks
what looks like a nice picture of on a graph does not mean peak detection is easier.
some of the lp filtering is just added in with excel also, even tried using trend lines in attempt at detecting pos and neg zero crossings
that's still not 100% effective. dsp is not my forte, dc drift in the readings can be neg or pos going or both or zero.
fft was a failure because i cannot remove the dc component effectively. i need a better method i have no effective strategy

The one that is like Example #1 in the textbooks is simply:

there is plenty of raw data posted, you can always ask for more. feel free to have a go