Hi

I am trying to use specific ranges from an ultrasonic range sensor (2 sensors) hooked up to arduino to trigger an action in a Processing sketch. Arduino reads, prints and sends values from the sensor to Processing, who in turn, can print them out so I know communication is happening at this level.... What Processing is not doing is acknowledging a threshold other than 0 to trigger the sound. 

I am extremely confused at this point (and clearly very new...) 

I wonder if the error is at the serial level or parsing of data, or both or other....

Any help would be very very very very very appreciated!!!!!!!!

Thank you!!!!!!!!!!!!!!

ARDUINO:

//modified from Tom Igoe

const int pwPin = 7;          // ultrasonic PW output

const int pingPin = 4;        // PING))) sensor PW output

  

void setup() {

  // initialize serial communication:

  Serial.begin(9600);

  pinMode(pwPin, INPUT);

  pinMode(pingPin, INPUT);

}

void loop()

{

int v;

  v= ez1();

  Serial.print (v);

  Serial.print (" ");

  v= PING();

  Serial.print (v);

  Serial.println("");

  delay (500);

}

/* PING))) sensor; return range in inches. */

int PING () {

long duration;

//   The PING))) is triggered by a HIGH pulse of 2 or more microseconds.

//   Give a short LOW pulse beforehand to ensure a clean HIGH pulse:

  pinMode(pingPin, OUTPUT);

  digitalWrite(pingPin, LOW);

  delayMicroseconds(2);

  digitalWrite(pingPin, HIGH);

//  delayMicroseconds(5);

  digitalWrite(pingPin, LOW);

  // The same pin is used to read the signal from the PING))): a HIGH

  // pulse whose duration is the time (in microseconds) from the sending

  // of the ping to the reception of its echo off of an object.

  pinMode(pingPin, INPUT);

  return (pulseIn (pingPin, HIGH) / 29 / 2);

}

long microsecondsToCentimeters(long microseconds)

{

  // The speed of sound is 340 m/s or 29 microseconds per centimeter.

  // The ping travels out and back, so to find the distance of the

  // object we take half of the distance travelled.

  return microseconds / 29 / 2;

}

/* Read the EZ-1 sensor and return range, in inches. */

int ez1 () {

  return (pulseIn (pwPin, HIGH) / 147); 

}

PROCESSING:

// modified example by Tom Igoe

import processing.serial.*;

import java.lang.Integer;

import ddf.minim.*;  

Minim minim;

AudioPlayer player;

AudioSample Sample1;

AudioSample Sample2;

int maxNumberOfSensors = 2;

Serial myPort;

float[] previousValue = new float[maxNumberOfSensors];

float val = 0;

float val1 = 1;

void setup() {

  size(50, 50);

  String portName = Serial.list()[0];

  myPort = new Serial(this, Serial.list()[0], 9600);

  println ("Port open");

  myPort.clear();

  myPort.bufferUntil('\n');

  println("setup done");

  

  minim = new Minim(this);

  Sample1 = minim.loadSample("Sample1");

  Sample2 = minim.loadSample("Sample2");

}

void draw() {

}

void serialEvent (Serial myPort) {

  String inString = myPort.readStringUntil('\n'); //get ASCII string

  if (inString != null) {

  print(inString);

  inString = trim(inString);

//    

//  if (myPort.available() > 0) {

//    print(myPort);

    

  float incomingValues[] = float(split(inString, ","));

   //print out the values

  println("length: " + incomingValues.length + " values.\t");

  if (incomingValues.length == maxNumberOfSensors) {

//  for (int i = 0; i < incomingValues.length; i++ ) {

  println("incomingValues");

  if (incomingValues[0]>=0) {

  val = incomingValues[0];

  //println("val>0");

//  Sample1();

  }

  if (incomingValues[1]>=0) 

  val1 = incomingValues[1];

  //println("val2>0");

//  Sample2();

  }

//        

//        if (val>0 && val<100) {

//          Sample1();

//        }

        

        if(val >= 0) {

          Sample2();

        }

    }

 }

void stop() {

  Sample1();

  Sample2();

  minim.stop();

  

  super.stop();

}