Bluetooth_Example.ino

/**
 * Simple Example Communications over Bluetooth using HC-05 Module
 *
 * Here's an example of the wiring diagram: https://goo.gl/qctNCN
 *
 *  Desktop (thru Arduino IDE)
 *    - Connect to HC-05 in bluetooth settings
 *    - Change Port in Tools -> Port to /dev/...HC-05 (NOT the Arduino Port)
 *    - Open the Serial Monitor (make sure baud rate is 9600)
 *    - Now you can send the single char commands through there
 *  Android
 *    - Arduino bluetooth controller (https://goo.gl/AYasQ1)
 *  iOS
 *    - Handy BLE (https://goo.gl/uKrv8F)
 *  
 *  Basically, any app will work as long as it can send characters over a serial
 *  bluetooth connection. 
 *
 *
 * @author: Rob Herley
 */

const int LEDPin = 13; // Variable to hold pin value
char input;            // Variable to hold bluetooth data

void setup() {
  Serial.begin(9600);      // Start the Serial Monitor at 9600 baud
  pinMode(LEDPin, OUTPUT); // Set the LED pin to output
}

void loop() {
  if (Serial.available() > 0) { // Check if Serial communication is active
    input = Serial.read(); // Read in a single character to the variable input
    Serial.print("Input Character Recieved: ");
    Serial.print(input);
    Serial.print('\n');
    switch (input) {
    case 'O': // Turn LED On
      Serial.println("Turning on LED");
      digitalWrite(LEDPin, HIGH);
      break;
    case 'F': // Turn LED Off
      Serial.println("Turning off LED");
      digitalWrite(LEDPin, LOW);
      break;
    default:
      Serial.println("The specified character does not have a case.");
    }
  }
}