Arduino PI

int testLed = 13;
int dotDelay = 200;
int hertz = 500000;
int tonePin = 4;
String data;


//define the morse code for the alphabet and numbers
char* letters[] = {
  ".-",     // A
  "-...",   // B
  "-.-.",   // C
  "-..",    // D
  ".",      // E
  "..-.",   // F
  "--.",    // G
  "....",   // H
  "..",     // I
  ".---",   // J
  "-.-",    // K
  ".-..",   // L
  "--",     // M
  "-.",     // N
  "---",    // O
  ".--.",   // P
  "--.-",   // Q
  ".-.",    // R
  "...",    // S
  "-",      // T
  "..-",    // U
  "...-",   // V
  ".--",    // W
  "-..-",   // X
  "-.--",   // Y
  "--.."    // Z
};

char* numbers[] = {
  "-----",   // 1
  ".----",   // 2
  "..---",   // 3
  "...--",   // 4
  "....-",   // 5
  ".....",   // 6
  "-....",   // 7
  "--...",   // 8
  "---..",   // 9
  "----."
};


void setup()                 
{
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }
  
  // send an intro:
  Serial.println("\n\nString Constructors:");
  Serial.println();
  pinMode(testLed, OUTPUT);
}

void loop()                    
{
  squenceToMoserse("PENDEJO");
  delay(500);    // Wait for 1 second
}



//=================================================================
//
// Function: morseCodeSequence
//
// Input: Character Array of Dots and Dashes to be sent
//
// Description:
//      This function takes as input an array or "." and "-" and
//      calls dotOrDash for each item in the array.
//
//      At the end of the sequence, there is a delay of 3 times 
//      the dot duration.
//=================================================================

void morseCodeSequence(char* sequence)
{
   int i = 0;

   // Loop for each element in the array
   while (sequence[i] != NULL)  
   {
      dotOrDash(sequence[i]);     // Send out the dot or dash
       i++;                        // Increment to the next element in the array
   }
   delay(dotDelay * 3);            // gap between letters
}


//=================================================================
//
// Function: dorOrDash
//
// Input: Character that should be either a dot or a dash
//
// Description:
//      This function first turns on the output then looks to see 
//      if the character is a "." and if so delays the dotDelay.
//      
//      If the character is not a "." then the routine assumes it
//      is a "-" and keep the output high for 3 times the length of
//      dotDelay.  This could be improved by making sure the 
//      character is a "-" but for most cases it would not matter.
//
//      After the delay time the pin is taken low turning off the 
//      LED.
//
//      Then it delays for one dotDelay time so the dots and dashes
//      do not run together.
//=================================================================
void dotOrDash(char dotOrDash)
{
  //digitalWrite(testLed, HIGH);
  if (dotOrDash == '.')
  {
    //delay(dotDelay);
    tone(tonePin, hertz, dotDelay);    
  }
  else // must be a -
  {
    //delay(dotDelay * 3);
    tone(tonePin, hertz, dotDelay * 3);    
  }
  //digitalWrite(testLed, LOW);    
  delay(dotDelay); // gap between flashes
}




void squenceToMoserse(char* sequence)
{
  int i = 0;
   // Loop for each element in the array
   while (sequence[i] != NULL)  
   {
        // Is it lowercase letter?
      if (sequence[i] >= 'a' && sequence[i] <= 'z')
      {
        morseCodeSequence(letters[sequence[i] - 'a']);
      }
      else if (sequence[i] >= 'A' && sequence[i] <= 'Z')    // Uppercase Letter
      {
        morseCodeSequence(letters[sequence[i] - 'A']);
      }
      else if (sequence[i] >= '0' && sequence[i] <= '9')    // Number
      {
        morseCodeSequence(numbers[sequence[i] - '0']);
      }
      else if (sequence[i] == ' ')                // Space (wait for 4 times dotDelay
      {
       delay(dotDelay * 4);      // gap between words  
      }
      i++;
   }
 
}