Serial Communication

Program #3

Arduino

int outputPin = 13;
int val;

void setup()
{
Serial.begin(9600);
pinMode(outputPin, OUTPUT);
}

void loop()
{
if (Serial.available()) {
val = Serial.read();
if (val == 'H') {
digitalWrite(outputPin, HIGH);
}
if (val == 'L') {
digitalWrite(outputPin, LOW);
}
}
}

Processing

import processing.serial.*;

Serial port;

void setup()
{
size(200, 200);
noStroke();
frameRate(10);

// List all the available serial ports in the output pane.
// You will need to choose the port that the Arduino board is
// connected to from this list. The first port in the list is
// port #0 and the third port in the list is port #2.
println(Serial.list());

// Open the port that the Arduino board is connected to (in this case #0)
// Make sure to open the port at the same speed Arduino is using (9600bps)
port = new Serial(this, Serial.list()[0], 9600);
}

// function to test if mouse is over square
boolean mouseOverRect()
{
return ((mouseX >= 50)&&(mouseX <= 150)&&(mouseY >= 50)&(mouseY <= 150));
}

void draw()
{
background(#222222);
if(mouseOverRect()) // if mouse is over square
{
fill(#BBBBB0); // change color
port.write('H'); // send an 'H' to indicate mouse is over square
} else {
fill(#666660); // change color
port.write('L'); // send an 'L' otherwise
}
rect(50, 50, 100, 100); // draw square
}

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