artisanal tech flip flop code

Arduino code

//  Variables
int pulsePin = 3;                 // Pulse Sensor purple wire connected to analog pin 0
int blinkPin = 13;                // pin to blink led at each beat
int fadePin = 5;                  // pin to do fancy classy fading blink at each beat
int fadeRate = 0;                 // used to fade LED on with PWM on fadePin

// Volatile Variables, used in the interrupt service routine!
volatile int BPM;                   // int that holds raw Analog in 0. updated every 2mS
volatile int Signal;                // holds the incoming raw data
volatile int IBI = 600;             // int that holds the time interval between beats! Must be seeded! 
volatile boolean Pulse = false;     // "True" when User's live heartbeat is detected. "False" when not a "live beat". 
volatile boolean QS = false;        // becomes true when Arduoino finds a beat.

// Regards Serial OutPut  -- Set This Up to your needs
static boolean serialVisual = false;   // Set to 'false' by Default.  Re-set to 'true' to see Arduino Serial Monitor ASCII Visual Pulse 


void setup(){
  pinMode(blinkPin,OUTPUT);         // pin that will blink to your heartbeat!
  pinMode(fadePin,OUTPUT);          // pin that will fade to your heartbeat!
  Serial.begin(115200);             // we agree to talk fast!
  interruptSetup();                 // sets up to read Pulse Sensor signal every 2mS 
   // IF YOU ARE POWERING The Pulse Sensor AT VOLTAGE LESS THAN THE BOARD VOLTAGE, 
   // UN-COMMENT THE NEXT LINE AND APPLY THAT VOLTAGE TO THE A-REF PIN
//   analogReference(EXTERNAL);   
}


//  Where the Magic Happens
void loop(){
  
    //serialOutput() ;       
    
  if (QS == true){     // A Heartbeat Was Found
                       // BPM and IBI have been Determined
                       // Quantified Self "QS" true when arduino finds a heartbeat
        digitalWrite(blinkPin,HIGH);     // Blink LED, we got a beat. 
        fadeRate = 255;         // Makes the LED Fade Effect Happen
                                // Set 'fadeRate' Variable to 255 to fade LED with pulse
       // serialOutputWhenBeatHappens();   // A Beat Happened, Output that to serial.     
        QS = false;
        if(BPM > 45 && BPM < 95){
          Serial.write(1);
          // reset the Quantified Self flag for next time    
        }
  }
     
  ledFadeToBeat();                      // Makes the LED Fade Effect Happen 
  delay(20);                             //  take a break
}


void ledFadeToBeat(){
    fadeRate -= 15;                         //  set LED fade value
    fadeRate = constrain(fadeRate,0,255);   //  keep LED fade value from going into negative numbers!
    analogWrite(fadePin,fadeRate);          //  fade LED
  }

Processing Code

import processing.serial.*;
import processing.pdf.*;
Serial myPort;

int val;
float lastTimeBeatFound = 0;
boolean bRecording = false;

void setup() {
  size(500, 700);
  background(255);
  fill(255);
  noStroke();
  println(Serial.list());
  String portName = Serial.list()[2];
  myPort = new Serial(this, portName, 115200);
  
}

void draw() {
  if ( myPort.available () > 0) {
    val = myPort.read();
    println(val);
  }  
  if (val == 1) { 
    lastTimeBeatFound = millis();
    if(!bRecording){
      bRecording = true;
      beginRecord(PDF, "Lines-######.pdf"); 
      println("START PDF");
    }
    
    //ellipseMode(CENTER);
    //ellipse(width/2, height/2, random(48,50), random(48,50));
    stroke(0);
   triangle(random(0, 700), random(0, 700), random(0, 700), random(0, 700), random(0,700), random(0,700));
  }else{
    if( bRecording && millis() - lastTimeBeatFound > (5*1000)){
      bRecording = false;
      endRecord();
      println("STOP PDF");
    }
  }
  val = 0;
  if(!bRecording){
      background(255);
  }
}

void mousePressed() {
  beginRecord(PDF, "Lines.pdf"); 
  background(255);
}

void mouseReleased() {
  endRecord();
  background(255);
}