[Arduino] Morse Parser

char alphabetReference[30] = {' ', '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'}; //Alphabetical Reference Table
char *morseTable[30] = {"dddd", "sl", "lsss", "lsls", "lss", "s", "ssls", "lls", "ssss", "ss", "slll", "lsl", "slss", "ll", "ls", "lll", "slls", "llsl", "sls", "sss", "l", "ssl", "sssl", "sll", "lssl", "lsll", "llss"}; //Morsecode Reference Table, each code corresponds to the same index in the  Alphabetical Reference table.
int sDelay = 200; //Delaytime of the short signal, "."
int lDelay = 600; //Delaytime of the long signal, "-"
int staticPin = 13; //Pin, where to output the signals.
char morseString[] = "SOS"; //String of characters to morse.

void illuminate(int time, int pin) {
  //illuminates the pin for the given amount of time.
  digitalWrite(pin, HIGH);
  delay(time);
  digitalWrite(pin, LOW);
  delay(sDelay);
}

void morse(int ref, boolean justPrint) {
  //parses the instruction for the corresponding character index, passed with "ref", and then calls the illuminate() function.
  if (!justPrint) {
    Serial.print("\nMorsing \"");
    Serial.print(alphabetReference[ref]);
    Serial.println("\"...");
  }
  char *strtmp = morseTable[ref];//passes the string on index "ref" in the morseTable Array.

  for (int j = 0; j < strlen(strtmp); j++) {
    //executes the code, by ripping it from the string, character by character.
    if (strtmp[j] == 's') {
      Serial.print(". ");
      if (!justPrint) {
        illuminate(sDelay, staticPin);
      }
    } else if (strtmp[j] == 'l') {
      Serial.print("- ");
      if (!justPrint) {
        illuminate(lDelay, staticPin);
      }
    } else if (strtmp[j] == 'd') {
      Serial.print("_ ");
      if (!justPrint) {
        delay(sDelay);
      }
    } else {
      Serial.print("Illegal Operation \"");
      Serial.print(strtmp[j]);
      Serial.print("\" for character \"");
      Serial.print(alphabetReference[ref]);
      Serial.println("\"");
    }
  }
  if (!justPrint) {
    delay(sDelay * 2);
  }
}

void setup() {
  Serial.begin(9600);
  pinMode(staticPin, OUTPUT);
  Serial.println("Character Mapping:");
  for (int i = 0; i < strlen(alphabetReference); i++) {
    //prints out all characters and morse code counterparts
    Serial.print(alphabetReference[i]);
    Serial.print("\t");
    morse(i, true);
    Serial.println();
  }

}

void loop() {
  Serial.println("\n-------------------------------------------");
  Serial.print("Preparing to morse \"");
  Serial.print(morseString);
  Serial.println("\"");
  for (int i = 0; i < strlen(morseString); i++) {
    //splits the string into single chars and passes them individually.
    for (int j = 0; j < strlen(alphabetReference); j++) {
      if (toupper(morseString[i]) == toupper(alphabetReference[j])) {
        morse(j, false);
      }
    }
  }
  morse(0, false);
}