int buzzer = 2; //sets the buzzer to pin 2 of the samd11c
int note = 1000; // Set the pitch for the buzzer tone

int timeUnit = 100; // this var will determine the lenght of the dot,dashes and pauses on the buzzer
char input;

void setup () 
{
Serial.begin(115200);//segin serial communications
}

void loop () 
{
if (Serial.available()) 
{
input = Serial.read();//read the input
if (input == 'a' || input == 'A') //if the var input hold the char "a" or "A" then calls the function 1A()
{
  lA();
}
if (input == 'b' || input == 'B')//if the var input hold the char "b" or "B" then calls the function 1B() 
{
  lB();
}
//from here on i'll put the if funtcion in a single line for it to use less lines
if (input == 'c' || input == 'C') {lC();}//if the var input hold the char "c" or "C" then calls the function 1C()
if (input == 'd' || input == 'D') {lD();}//if the var input hold the char "d" or "D" then calls the function 1D()
if (input == 'e' || input == 'E') {lE();}//if the var input hold the char "e" or "E" then calls the function 1E()
if (input == 'f' || input == 'F') {lF();}//if the var input hold the char "f" or "F" then calls the function 1F()
if (input == 'g' || input == 'G') {lG();}//if the var input hold the char "g" or "G" then calls the function 1G()
if (input == 'h' || input == 'H') {lH();}//if the var input hold the char "h" or "H" then calls the function 1H()
if (input == 'i' || input == 'I') {lI();}//if the var input hold the char "i" or "I" then calls the function 1I()
if (input == 'j' || input == 'J') {lJ();}//if the var input hold the char "j" or "J" then calls the function 1J()
if (input == 'k' || input == 'K') {lK();}//if the var input hold the char "k" or "K" then calls the function 1K()
if (input == 'l' || input == 'L') {lL();}//if the var input hold the char "l" or "L" then calls the function 1L()
if (input == 'm' || input == 'M') {lM();}//if the var input hold the char "m" or "M" then calls the function 1M()
if (input == 'n' || input == 'N') {lN();}//if the var input hold the char "n" or "N" then calls the function 1N()
if (input == 'o' || input == 'O') {lO();}//if the var input hold the char "o" or "O" then calls the function 1O()
if (input == 'p' || input == 'P') {lP();}//if the var input hold the char "p" or "P" then calls the function 1P()
if (input == 'q' || input == 'Q') {lQ();}//if the var input hold the char "q" or "Q" then calls the function 1Q()
if (input == 'r' || input == 'R') {lR();}//if the var input hold the char "r" or "R" then calls the function 1R()
if (input == 's' || input == 'S') {lS();}//if the var input hold the char "s" or "S" then calls the function 1S()
if (input == 't' || input == 'T') {lT();}//if the var input hold the char "t" or "T" then calls the function 1T()
if (input == 'u' || input == 'U') {lU();}//if the var input hold the char "u" or "U" then calls the function 1U()
if (input == 'v' || input == 'V') {lV();}//if the var input hold the char "v" or "V" then calls the function 1V()
if (input == 'w' || input == 'W') {lW();}//if the var input hold the char "w" or "W" then calls the function 1W()
if (input == 'x' || input == 'X') {lX();}//if the var input hold the char "x" or "X" then calls the function 1X()
if (input == 'y' || input == 'Y') {lY();}//if the var input hold the char "y" or "Y" then calls the function 1Y()
if (input == 'z' || input == 'Z') {lZ();}//if the var input hold the char "z" or "Z" then calls the function 1Z()
if (input == ' ') {wordPause();}//if the var input holds the char " " (space between letters) then calls the function wordPause() 
Serial.println (input);//prints the value of the input
}
}
//Letter functions
void lA () //secuence of functions that represents the letter A in morse code
{
  dot();
  dash();
  letterPause();
}
void lB ()//secuence of functions that represents the letter A in morse code 
{
  dash();
  dot();
  dot();
  dot();
  letterPause();
}
//from here on i'll put the sequences in a single line to use less lines
void lC () {dash();dot();dash();dot();letterPause();}
void lD () {dash();dot();dot();letterPause();}
void lE () {dot();letterPause();}
void lF () {dot();dot();dash();dot();letterPause();}
void lG () {dash();dash();dot();letterPause();}
void lH () {dot();dot();dot();dot();letterPause();}
void lI () {dot();dot();letterPause();}
void lJ () {dot();dash();dash();dash();letterPause();}
void lK () {dash();dot();dash();letterPause();}
void lL () {dot();dash();dot();dot();letterPause();}
void lM () {dash();dash();letterPause();}
void lN () {dash();dot();letterPause();}
void lO () {dash();dash();dash();letterPause();}
void lP () {dot();dash();dash();dot();letterPause();}
void lQ () {dash();dash();dot();dash();letterPause();}
void lR () {dot();dash();dot();letterPause();}
void lS () {dot();dot();dot();letterPause();}
void lT () {dash();letterPause();}
void lU () {dot();dot();dash();letterPause();}
void lV () {dot();dot();dot();dash();letterPause();}
void lW () {dot();dash();dash();letterPause();}
void lX () {dash();dot();dot();dash();letterPause();}
void lY () {dash();dot();dash();dash();letterPause();}
void lZ () {dash();dash();dot();dot();letterPause();}

void dot()//a function that holds the "dot" feature(emits a sound for 100 miliseconds)
{
tone(buzzer, note, timeUnit);// function tone (pin,pitch of the tone,duration of the tone)
delay(timeUnit * 2);//200 miliseconds to represent 1 dot
}

void dash() //Emit a longer sound to represent a dash on morse code
{
tone(buzzer, note, timeUnit * 3);// function tone (pin,pitch of the tone, duration of the tone 3 times longer than the dot)
delay(timeUnit * 4);//400 miliseconds to represent 1 dash
}

void letterPause() // silence between letters
{
delay(timeUnit * 3);//300 miliseconds
}

void wordPause()//silence between words
{
delay (timeUnit * 7); //700 miliseconds 
}