// communication with an arduino pro mini
// on a bread board via the HC-05 bluetooth chip

  #define NOTE_AS1 58
  #define NOTE_B1  62
  #define NOTE_C2  65
  #define NOTE_CS2 69
  #define NOTE_D2  73
  #define NOTE_DS2 78
  #define NOTE_E2  82
  #define NOTE_F2  87
  #define NOTE_FS2 93
  #define NOTE_G2  98
  #define NOTE_GS2 104
  #define NOTE_A2  110
  #define NOTE_AS2 117
  #define NOTE_B2  123
  #define NOTE_C3  131
  #define NOTE_CS3 139
  #define NOTE_D3  147
  #define NOTE_DS3 156
  #define NOTE_E3  165
  #define NOTE_F3  175
  #define NOTE_FS3 185
  #define NOTE_G3  196
  #define NOTE_GS3 208
  #define NOTE_A3  220
  #define NOTE_AS3 233
  #define NOTE_B3  247
  #define NOTE_C4  262
  #define NOTE_CS4 277
  #define NOTE_D4  294
  #define NOTE_DS4 311
  #define NOTE_E4  330
  #define NOTE_F4  349
  #define NOTE_FS4 370
  #define NOTE_G4  392
  #define NOTE_GS4 415
  #define NOTE_A4  440

  int data = 0;
  int led = 13;    // onboard led for testing
  int piezo = 10;  // piezo speaker output pin 
  int length = 400; // length of notes
  int pitch = 440;  // middle A


  void setup() {
    pinMode(led, OUTPUT);
    pinMode(piezo, OUTPUT);
    Serial.begin(9600);
    // ...
    while (!Serial) {
      // wait for serial port to connect. 
      // Needed for native USB port only
      ; 
    }
    Serial.println("Blueboard: printing serial data...");

  }

  void loop() {
    if (Serial.available() > 0) {
      data = Serial.read();
      Serial.println("");
      //Serial.print("rx:");
      Serial.print('"');
      Serial.write(data);
      Serial.print('"');
      Serial.println(" ascii");
      Serial.print(data);
      Serial.println(" decimal");
      Serial.print(data, HEX);
      Serial.println(" hex");
    }

    if (data == 's') {
      Serial.println("Siren!");
      tone(piezo, pitch, length);
      delay(length+60);
      tone(piezo, pitch+15, length);
      delay(length+60);
      tone(piezo, pitch+30, 200);
      delay(260);
    }
    else if (data == 'l') {
      Serial.println("Increase note length by 50 ms");
      length = length+50;
    }
    else if (data == 'L') {
      Serial.println("Decrease note length by 50 ms");
      length = length-50;
    }
    else if (data == 'p') {
      Serial.println("Increase pitch by 15 herz");
      pitch = pitch+15;
    }
    else if (data == 'P') {
      Serial.println("Decrease pitch by 15 herz");
      pitch = pitch-15;
    }
    else if (data == 'i') {
      Serial.print("Pitch (Herz):");
      Serial.println(pitch, DEC);
      Serial.print("Note Length (milliseconds):");
      Serial.println(length, DEC);
    }
    else if (data == 'S') {
      // silence
    }
    else if (data == 'a') {
      Serial.println("Alarm!");
      for (int ii = 0; ii < 5; ii++) {
        tone(piezo, pitch, length);
        delay(length+60);
        tone(piezo, pitch-30, length);
        delay(length+60);
      }
    }
    else if (data == 'b') {
      // blink on board led
      Serial.println("Blink!");
      for (int ii = 0; ii < 5; ii++) {
        digitalWrite(led, HIGH);   
        delay(100);                      
        digitalWrite(led, LOW);   
        delay(100);  
      }
    }
    else {}
  }