Sketch for Arduino Bluetooth Controller

BT-test.ino

void setup() {
  // initialize serial communication:
  Serial.begin(38400);// this can be different for your Bluetooth module. It can be 9600 also.
  // initialize the LED pins:
  for (int thisPin = 2; thisPin < 13; thisPin++) {
    pinMode(thisPin, OUTPUT);
  }
}

void loop() {
  // read the sensor:
  if (Serial.available() > 0) {
    int inByte = Serial.read();


    switch (inByte) {
      case 'A':// when the app sends A, it turns on D13
        digitalWrite(13, HIGH);       
        break;        
      case 'B':// when the app sends B, it turns off D13
        digitalWrite(13, LOW);     
        break;

         case 'C':// when the app sends A, it turns on D13
        digitalWrite(12, HIGH);       
        break;        
      case 'D':// when the app sends B, it turns off D13
        digitalWrite(12, LOW);     
        break;

         case 'E':// when the app sends A, it turns on D13
        digitalWrite(11, HIGH);       
        break;        
      case 'F':// when the app sends B, it turns off D13
        digitalWrite(11, LOW);     
        break;

         case 'G':// when the app sends A, it turns on D13
        digitalWrite(10, HIGH);       
        break;        
      case 'H':// when the app sends B, it turns off D13
        digitalWrite(10, LOW);     
        break;

         case 'I':// when the app sends A, it turns on D13
        digitalWrite(9, HIGH);       
        break;        
      case 'J':// when the app sends B, it turns off D13
        digitalWrite(9, LOW);     
        break;

         case 'K':// when the app sends A, it turns on D13
        digitalWrite(8, HIGH);       
        break;        
      case 'L':// when the app sends B, it turns off D13
        digitalWrite(8, LOW);     
        break;

         case 'M':// when the app sends A, it turns on D13
        digitalWrite(7, HIGH);       
        break;        
      case 'N':// when the app sends B, it turns off D13
        digitalWrite(7, LOW);     
        break;

         case 'O':// when the app sends A, it turns on D13
        digitalWrite(6, HIGH);       
        break;        
      case 'P':// when the app sends B, it turns off D13
        digitalWrite(6, LOW);     
        break;

         case 'Q':// when the app sends A, it turns on D13
        digitalWrite(5, HIGH);       
        break;        
      case 'R':// when the app sends B, it turns off D13
        digitalWrite(5, LOW);     
        break;

         case 'S':// when the app sends A, it turns on D13
        digitalWrite(4, HIGH);       
        break;        
      case 'T':// when the app sends B, it turns off D13
        digitalWrite(4, LOW);     
        break;

         case 'U':// when the app sends A, it turns on D13
        digitalWrite(3, HIGH);       
        break;        
      case 'V':// when the app sends B, it turns off D13
        digitalWrite(3, LOW);     
        break;

         case 'W':// when the app sends A, it turns on D13
        digitalWrite(2, HIGH);       
        break;        
      case 'X':// when the app sends B, it turns off D13
        digitalWrite(2, LOW);     
        break;  
        
    

      
      default:
        // turn all the LEDs off:
        for (int thisPin = 2; thisPin < 13; thisPin++) {
          digitalWrite(thisPin, LOW);
        }
    }
  }
}