Processing for Android

<code>

<pre>

/**
* BtSerial  Serial display
Lists paired devices and connects to the first one on the list.
Displays an incoming string from the serial connection.
If it gets a newline, it clears the string

created 27 June 2011
modified 3 July 2011
by Tom Igoe
tweaked by dano to add graphing
*/

import cc.arduino.btserial.*;

//For GUI
String[] fontList;
PFont androidFont;
// instance of the library:
BtSerial bt;
String inString = “”;
int xpos,ypos;

void setup() {
// Setup Fonts:
fontList = PFont.list();
androidFont = createFont(fontList[0], 8, true);
textFont(androidFont, 24);
textAlign(CENTER);

// instantiate the library:
bt = new BtSerial( this );
// get a list of paired devices:
String[] pairedDevices = bt.list();
if (pairedDevices.length > 0) {
println(pairedDevices);
// open a connection to the first one:
bt.connect( pairedDevices[0] );
}
else {
text(“Couldn’t get any paired devices”, 10, height/2);
}
}

void draw() {
// black with a nice light blue text:
//background(0);
fill(#D3C7FE);
char inByte = 0;    // byte you’ll read from serial connection

// if you’re connected, check for any incoming bytes:
if ( bt != null ) {
if ( bt.isConnected() ) {

// put the connected device’s name on the screen:
text(“connected to” + bt.getName(), 10, screenHeight/3);
// if there are incoming bytes available, read one:
if (bt.available() > 0) {
inByte = char(bt.read());
if (inByte == ‘\n’) {
ypos= int(inString);
inString = “”;
}
else {
inString += inByte;
}

xpos++;
if (xpos >= screenWidth) {
xpos =  0;
background(0);
}

println(ypos);
ellipse(xpos, ypos, 20, 20);
// display the latest center screen:
text(inString, screenWidth/2, screenHeight/2);
}
}
}
}

// disconnect on pause so you can reconnect:
void pause() {
if (bt != null) {
bt.disconnect();
}
}

void resume() {
}

</pre>

</code>

Arduino

<code>

<pre>

/*
AnalogReadSerial
Reads an analog input on pin 0, prints the result to the serial monitor

This example code is in the public domain.
*/

void setup() {
Serial.begin(115200);
}

void loop() {
int sensorValue = analogRead(A0);
Serial.print(sensorValue);
Serial.write(10);
delay(100);

}

</pre>

</code>