//
#include <Keypad.h>
#include <LiquidCrystal.h>
LiquidCrystal lcd = LiquidCrystal(2, 3, 4, 5, 6, 7);

const byte ROWS = 4; //4 Lignes (4 Lines, 4 rows)
const byte COLS = 3; //3 Colonnes (3 columns)
char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};

// FR: Connecté sur les lignes du KeyPad (L1, L2, L3, L4) 
byte rowPins[ROWS] = {14, 15, 16, 17};

// FR: Connecté sur les colonnes dy KeyPad (C1, C2, C3)
byte colPins[COLS] = {18, 19, 13}; 

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

int cursorColumn = 0;
void setup(){
   lcd.begin(16, 2);
   pinMode(12, INPUT_PULLUP);       // la broche led est en sortie
   }

void loop(){
char key = keypad.getKey();
  if (key) {
    lcd.setCursor(cursorColumn, 0); // move cursor to   (cursorColumn, 0)
    lcd.print(key);                 // print key at (cursorColumn, 0)
    cursorColumn++;                 // move cursor to next position
    if(cursorColumn == 17) {        // if reaching limit, clear LCD
     lcd.clear();
     cursorColumn = 0;
     lcd.print(key);
     cursorColumn = 1;
    }
  }

if (digitalRead(12)==LOW) {
 lcd.clear();
 cursorColumn = 0;
 }

}