// send signal to ATtiny44 (Arduino IDE), via SoftwareSerial
// signal is produced by moving ControlP5 "slider" with mouse, 
// X-potision of a circle (ellipse) represents the signal value.

import controlP5.*;
ControlP5 cp5;

import processing.serial.*;
Serial port;

int sliderX= 200;

void setup() {
  size(256, 150);

  cp5 = new ControlP5(this);

  cp5.addSlider("sliderX")
    .setPosition(50, 100)
    .setSize(130, 30)
    .setRange(0, 255)
    //    .setNumberOfTickMarks(5)
    ;

  println("Available serial ports:");

  // if using Processing 2.1 or later, use Serial.printArray()
  printArray(Serial.list());

  // Uses the first port in this list (number 0). Change this to select the port
  // corresponding to your Arduino board. The last parameter (e.g. 9600) is the
  // speed of the communication. It has to correspond to the value passed to
  // Serial.begin() in your Arduino sketch.

  port = new Serial(this, Serial.list()[5], 9600);

  // If you know the name of the port used by the Arduino board, you can specify
  // it directly like this.
  //port = new Serial(this, "COM1", 9600);
}

void draw() {

  background(0, 255, 255);
  ellipse(sliderX, 50, 50, 50);

  port.write(sliderX);
  delay(50);
}