How to get separate BPM readings from two pulse sensors using one Arduino Here is the code I used to get BPM from pulse sensor.

#define USE_ARDUINO_INTERRUPTS true    // Set-up low-level interrupts for most 
acurate BPM math.
#include &lt;PulseSensorPlayground.h&gt;     // Includes the PulseSensorPlayground 
Library.


//  Variables

const int PULSE_SENSOR_COUNT = 2;
const int PulseWire = A0;
const int PulseWire2 = A1;
const int LED13 = 13;
int Threshold = 550;

void setup() {
  Serial.begin(9600);
  pulseSensor.analogInput(PulseWire, 0);
  pulseSensor.analogInput(PulseWire2, 1);
  pulseSensor.blinkOnPulse(LED13);
  pulseSensor.setThreshold(Threshold);
  if (pulseSensor.begin()) {
  }

  void loop() {
    int myBPM = pulseSensor.getBeatsPerMinute();  // Calls function on our pulseSensor object that returns BPM as an "int".

    if (pulseSensor.sawStartOfBeat()) {            // Constantly test to see if "a beat happened".
      //Serial.println("♥  A HeartBeat Happened ! "); // If test is "true", print a message "a heartbeat happened".
      Serial.print("BPM1: ");                        // Print phrase "BPM: "
      Serial.println(myBPM);                        // Print the value inside of myBPM.
    }
    delay(20);                    // considered best practice in a simple sketch.
  }


I wish to separate display the BPM that get from A0 wire and A1 wire. Serial could print something like this: BPM1(A0):75, BPM2(A1):80.
I don't know how to do that, can anyone help me with it?
Change &quot;#define USE_ARDUINO_INTERRUPTS true&quot; to &quot;#define USE_ARDUINO_INTERRUPTS false&quot;.

If, instead, your Sketch does not use interrupts to read PulseSensor data, your Sketch must instead contain the following two lines, in order:
#define USE_ARDUINO_INTERRUPTS false
#include &lt;PulseSensorPlayground.h&gt;

Source: https://github.com/WorldFamousElectronics/PulseSensorPlayground/blob/master/src/PulseSensorPlayground.h