Troubleshooting serial plotter and BPM from ecg

[sterretje]

Which board are you using?
What is the sensor?

@anshls

if (signal > 100){
    bpm= bpm+1;
   }

    bpm= bpm*6;

Think about this. First time that your signal is over 100, bpm is incremented and multiplied; so now is 6. Next time through loop, you multiply again and bpm becomes 36 (signal < 100). And the third time through loop() (signal < 100), bpm is multiplied again and becomes 216.

You also never reset bpm so it will overflow.

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Your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advise on) your project See About the IDE 1.x category.