//Morsecodes in aufsteigender Reihenfolge der ASCII-Werte
//Dadurch kann durch (ASCII-Wert eines Zeichens) - (0x30) der Index im Array berechnet werden
char morseCodeArray [50][6] = 
  {
    {'-','-','-','-','-','x'},  //0 -> 0x30 -> Index 0
    {'.','-','-','-','-','x'},  //1 -> 0x31 -> Index 1
    {'.','.','-','-','-','x'},  //2
    {'.','.','.','-','-','x'},  //3
    {'.','.','.','.','-','x'},  //4
    {'.','.','.','.','.','x'},  //5
    {'-','.','.','.','.','x'},  //6
    {'-','-','.','.','.','x'},  //7
    {'-','-','-','.','.','x'},  //8
    {'-','-','-','-','.','x'},  //9
    {'x','x','x','x','x','x'},  //:
    {'x','x','x','x','x','x'},  //;
    {'x','x','x','x','x','x'},  //<
    {'x','x','x','x','x','x'},  //=
    {'x','x','x','x','x','x'},  //>
    {'x','x','x','x','x','x'},  //?
    {'x','x','x','x','x','x'},  //@
    {'.','-','x','x','x','x'},  //A -> 0x41 -> Index 17
    {'-','.','.','.','x','x'},  //B -> 0x42 -> Index 18
    {'-','.','-','.','x','x'},  //C
    {'-','.','.','x','x','x'},  //D
    {'.','x','x','x','x','x'},  //E
    {'.','.','-','.','x','x'},  //F
    {'.','.','-','.','x','x'},  //G
    {'.','.','.','.','x','x'},  //H
    {'.','.','x','x','x','x'},  //I
    {'.','-','-','-','x','x'},  //J
    {'-','.','-','x','x','x'},  //K
    {'.','-','.','.','x','x'},  //L
    {'-','-','x','x','x','x'},  //M
    {'-','.','x','x','x','x'},  //N
    {'-','-','-','x','x','x'},  //O
    {'.','-','-','.','x','x'},  //P
    {'-','-','.','-','x','x'},  //Q
    {'.','-','.','x','x','x'},  //R
    {'.','.','.','x','x','x'},  //S
    {'-','x','x','x','x','x'},  //T
    {'.','.','-','x','x','x'},  //U
    {'.','.','.','-','x','x'},  //V
    {'.','-','-','x','x','x'},  //W
    {'-','.','.','-','x','x'},  //X
    {'-','.','-','-','x','x'},  //Y
    {'-','-','.','.','x','x'},  //Z
  };

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

void loop()
{
  morsecodeSenden("SOS SOS", 250, 13); //Sendetext, Länge eines dit in Millisekunden, GpioPin der Led
  delay(5000);
}

void morsecodeSenden(String sendeText, uint16_t dit, uint8_t led)
{
  char sendeZeichenfolge[50];
  
  pinMode(led, OUTPUT);
  uint8_t an = 1;  // einstellen ob Plus- oder Minusschaltend
  uint8_t aus = 0; // einstellen ob Plus- oder Minusschaltend
  
  uint16_t punktZeit;
  uint16_t strichZeit;
  uint16_t punktStrichPause;
  uint16_t buchstabenPause;
  uint16_t wortPause;

  punktZeit        = 1 * dit;
  strichZeit       = 3*dit;
  punktStrichPause = 1 * dit;
  buchstabenPause  = 5 * dit;
  wortPause        = 7 * dit;

  sendeText.toCharArray(sendeZeichenfolge, sendeText.length()+1);
  
  for(uint8_t n = 0; n < sendeText.length()+1; n++)
  {
    char sendezeichen = sendeZeichenfolge[n];
    Serial.println(sendezeichen);
    if(sendezeichen == 0x00)  // Nullterminierung des Sendetextes
    {
      Serial.println("Ausgabe beendet");
      n = sendeText.length();  
      delay(wortPause);
      delay(wortPause);
      delay(wortPause);
    }
    else if(sendezeichen == ' ')  // Leerzeichen zwischen zwei Worten
    {
      Serial.println("Leerzeichen");
      delay(wortPause);
    }
    else
    {
      for(uint8_t m = 0; m < 6; m++)
      {
        Serial.println(morseCodeArray[sendezeichen - 0x30][m]);
        if(morseCodeArray[sendezeichen - 0x30][m] == '.')
        {
          digitalWrite(led,an);
          delay(punktZeit);
          digitalWrite(led,aus);
        }
        else if(morseCodeArray[sendezeichen - 0x30][m] == '-')
        {
          digitalWrite(led,an);
          delay(strichZeit);
          digitalWrite(led,aus);
        }
        else  // x erkannt
        {
          m = 6; // -> m-Schleife beenden
          delay(buchstabenPause);
        }
        delay(punktStrichPause);
      }
    }
  }
}