pulse-snippet.cpp

void setup(){
  Serial.begin(115200);      // we agree to talk fast!
  pinMode(blinkPin,OUTPUT);  // pin that will blink to your heartbeat!
  interruptSetup();          // sets up to read Pulse Sensor signal every 2mS 
}

void loop(){
 if (QS == true){ 
        Serial.println(IBI); // milliseconds: '660\n'
	QS = false;  
     }
 delay(20);
}