Introduction to Physical Computing

ITP

​

This sketch will send 2 values in ascii from arduino to P5

See arduino code in bottom, have pots connected to A0 and A1*/

​

var serial; // variable to hold an instance of the serialport library

var fromSerial = 0,fromSerial2 = 0; //variable to hold the data

​

function setup() {

  createCanvas(320, 240);

  serial = new p5.SerialPort(); // make a new instance of  serialport librar    

  serial.on('list', printList); // callback function for serialport list event

  serial.on('data', serialEvent); // callback for new data coming in    

  serial.list(); // list the serial ports

  serial.open("/dev/tty.usbmodem14221"); // open a port

}

​

function draw() {

  // do your drawing stuff here

  fill(255,5);

  rect(0,0,width, height);

  ellipse(fromSerial, fromSerial2, 5, 5);

}

​

// get the list of ports:

function printList(portList) {

  for (var i = 0; i < portList.length; i++) {

    // Display the list the console:

    print(i + " " + portList[i]);

  }

}

​

function serialEvent() {

  // this is called when data is recieved, data will then live in fromSerial    

  var stringFromSerial = serial.readLine();    // reads everything till the new line charecter

  if (stringFromSerial.length > 0) {             // is the something there ?

    var trimmedString = trim(stringFromSerial);  // get rid of all white space

    var myArray = split(trimmedString, ",")      // splits the string into an array on commas

    fromSerial = Number(myArray[0]);             // get the first item in the array and turn into integer

    fromSerial2 = Number(myArray[1]);           // get the second item in the array and turn into integer

  }

}

​

/*  

// Arduino Code 

void setup() {

  Serial.begin(9600);

}

void loop() {

  int valueToSend = analogRead(A0)/4;

  Serial.print(valueToSend);

  Serial.print(",");

  valueToSend = analogRead(A1)/4;

  Serial.println(valueToSend);

  delay (10);

}

*/