I am using Phidget's VINT Hub as the board. The Graph visualizer works fine, and I have been trying to get it to display the BPM. The code works, there's just nothing to get the BPM. And I'm using the code listed here.

Here's my current code, which is unchanged.

import com.phidget22.*;


VoltageRatioInput heartSensor;
Scrollbar scaleBar;

PFont font;
PFont portsFont;

//Holds heartbeat data
float [] pulses;      
float [] scaledPulses;   

float zoom;
color eggshell = color(255, 253, 248);

//Sizing of windows
int PulseWindowWidth = 490;
int PulseWindowHeight = 512;
int BPMWindowWidth = 180;
int BPMWindowHeight = 340;

void setup() {
  size(700, 600);
  frameRate(100);
  font = loadFont("Arial-BoldMT-24.vlw");
  textFont(font);
  textAlign(CENTER);
  rectMode(CENTER);
  ellipseMode(CENTER);

  //Create scroll bar for zooming
  scaleBar = new Scrollbar (400, 575, 180, 12, 0.0, 1.0);
  
  pulses = new float[PulseWindowWidth];
  scaledPulses = new float[PulseWindowWidth];
  
  //Default zoom
  zoom = 0.75;                               

  //Drawing
  resetDataTraces();
  background(0);
  drawDataWindows();
  drawHeart();
  fill(eggshell);

  //Phidgets initialize 
  try {
    //Create
    heartSensor = new VoltageRatioInput();
    //Address
    heartSensor.setHubPort(0);
    heartSensor.setIsHubPortDevice(true);
    //Open
    heartSensor.open(1000);
    //Set data interval to minimum | This will increase the data rate from the sensor, and make your graph more responsive
    heartSensor.setDataInterval(heartSensor.getMinDataInterval());
  }
  catch(Exception e) {
    e.printStackTrace();
  }
}

void drawDataWindows() {
  noStroke();
  fill(eggshell);
  rect(255, height/2, PulseWindowWidth, PulseWindowHeight);
  rect(600, 385, BPMWindowWidth, BPMWindowHeight);  
}

void drawHeart() {
  fill(250, 0, 0);
  stroke(250, 0, 0);
  smooth();
  bezier(width-100, 50, width-20, -20, width, 140, width-100, 150);
  bezier(width-100, 50, width-190, -20, width-200, 140, width-100, 150);
  strokeWeight(1);
}

void drawPulseWaveform() {
  float pulseVal = 0;
  try {
    pulseVal = (float)heartSensor.getVoltageRatio();
  }
  catch(Exception e) {
    e.printStackTrace();
  }
  
  pulses[pulses.length-1] = ((pulseVal - 0.5)* 512);   //pulseVal is between 0 and 1. Center and scale up to fit window.
  zoom = scaleBar.getPos();  
  for (int i = 0; i < pulses.length-1; i++) {
      pulses[i] = pulses[i+1];                         // shifting all raw datapoints one pixel left
      scaledPulses[i] = pulses[i] * -zoom + height/2;  // adjust the raw data to the selected scale
  }
  stroke(250, 0, 0);                               
  noFill();
  beginShape();                                  
  for (int x = 1; x < scaledPulses.length-1; x++) {
    vertex(x+10, scaledPulses[x]);                    //draw a line connecting the data points
  }
  endShape();
}

void draw() {
  background(0);
  noStroke();
  drawDataWindows();
  drawPulseWaveform();
  drawHeart();
  
  fill(eggshell);
  text("Pulse Sensor Amped Visualizer - Phidgets", 245, 30);
  text("IBI",600,585); // TODO for next project
  text("BPM",600,200); // TODO for next project
  text("Pulse Window Scale " + nf(zoom, 1, 2), 150, 585);

  //Manage scroll bar
  scaleBar.update (mouseX, mouseY);
  scaleBar.display();
}

void resetDataTraces() {
  for (int i=0; i<pulses.length; i++) {
    pulses[i] = height/2;
  }
}

Not displaying BPM and IBI #27

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