void setup() {
  pinMode(2, OUTPUT);
  Serial.begin(115200);
}
void loop() {
  if (Serial.available()) {         // si des caractères sont envoyés
    char caractere = Serial.read(); // lecture d'un caractère
    if (caractere == 'a' || caractere == 'A') {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
    }
        if (caractere == 'b'|| caractere == 'B') {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
    }
    if (caractere == 'c' || caractere == 'C') {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
    }
     if (caractere == 'd' || caractere == 'D') {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
     }
    if (caractere == 'e' || caractere == 'E') {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
    }
     if (caractere == 'f' || caractere == 'F') {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
     }
      if (caractere == 'h' || caractere == 'H') {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
      }
       if (caractere == 'g' || caractere == 'G') {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
      }
       if (caractere == 'i' || caractere == 'I') {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
      }
       if (caractere == 'j' || caractere == 'J') {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
      }
       if (caractere == 'k' || caractere == 'K') {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      delay(750);
      }
       if (caractere == 'l' || caractere == 'L') {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
      }
      if (caractere == 'm' || caractere == 'M') {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
      }
      if (caractere == 'n' || caractere == 'N') {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);

      }
      if (caractere == 'o' || caractere == 'O') {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
      }
      if (caractere == 'p' || caractere == 'P') {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
      }
      if (caractere == 'q' || caractere == 'Q') {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
      }
      if (caractere == 'r' || caractere == 'R') {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
      }
      if (caractere == 's' || caractere == 'S') {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
      }
      if (caractere == 't' || caractere == 'T') {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
      }
      if (caractere == 'u' || caractere == 'U') {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
      }
      if (caractere == 'v' || caractere == 'V') {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
      }
      if (caractere == 'w' || caractere == 'W') {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
      }
      if (caractere == 'x' || caractere == 'X') {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
      }
      if (caractere == 'y' || caractere == 'Y') {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
      }
      if (caractere == 'z' || caractere == 'Z') {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
      }
     if (caractere == '1' ) {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
     }
if (caractere == '2' ) {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
     }
if (caractere == '3' ) {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
     }
if (caractere == '4' ) {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
     }
if (caractere == '5' ) {
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
     }
if (caractere == '6' ) {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
     }
if (caractere == '7' ) {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
     }
if (caractere == '8' ) {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
     }
if (caractere == '9' ) {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(250);
      noTone(2);
      delay(750);
     }
if (caractere == '0' ) {
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(250);
      tone(2, 2500);
      delay(750);
      noTone(2);
      delay(750);
     }
      if (caractere == ' ') {
      delay(1000);
      }	
    Serial.print(caractere);
  }
  
}