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Visitor II
May 29, 2021
Question

Heart rate sensor output

  • May 29, 2021
  • 1 reply
  • 650 views

Hi I’m using an arduino heart rate sensor on the nuclei f411re board and I am getting output values of 2000-3500 when not pressed and values between 0-10 when pressed I can’t find much information about it online and I was wondering what do these numbers exactly mean? On the internet I have seen outputs of arduino between 60-100.

this is the sensor I am using. https://www.auselectronicsdirect.com.au/heart-rate-pulse-sensor-module-for-arduino-project?gclid=CjwKCAjwqcKFBhAhEiwAfEr7zZgCF352JfZAUrQ0SwoDAuGfIB-37AJCSLpHLK-ZPvs-pB2u6-bhiRoC9JwQAvD_BwE

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    1 reply

    ST Employee
    June 1, 2021

    Hi @MMori.6​ ,

    it is difficult for me, to help you without more information about the heart rate monitor.

    it seems a data interpretation problem to me.

    you should check the datasheet (or ask for it to whoever sold it to you) and see if the data coming from the HR monitor are processed as the datasheet says.

    for example, check if the data is little endian or big endian, or if you somehow mixed the byte chunks.

    hope this helps,

    Niccolò