I want to measure HRV

New to Arduino. I have an UNO. Purchased a heart rate sensor and now can read my pulse (with a flashing red light signal only). Trying to build a simple heart measuring device to track HRV. I would like to read the time value between the heartbeats and create a graph on my LCD with an accompanying sound. If someone could point me in the right direction I would be most grateful.

Considering the graph you want to display:

  1. If you have interval between heart beats on the y axis, the faster the pulse, the lower the curve on the graph. Probably nicer would be pulse rate which would be the inverse.
  2. If the x axis shows time, how much history do you want to display? A few minutes? or maybe the last few beats ?

What display are you using? Post a link to it.

Pulse from pulsewave does not give HRV from ECG. Just to keep in mind.

Thanks for replies! I want to create a graph line similar to this attached, by accurately measuring the space of time between the beats for the X axis, over time the Y axis.

Hrv graph image.PNG 2.PNG

6v6gt, ah, I see what you mean about the interval between and yes it would be measuring the pulse rate.

https://www.google.com/search?q=1602a+lcd+arduino&rlz=1C1CHBD_en-GBGB834GB834&oq=1602a&aqs=chrome.1.69i57j0l6.6252j0j7&sourceid=chrome&ie=UTF-8

Ok, but a 1602 display is not suitable for displaying a graph.