#include <LiquidCrystal.h>

#include <Keypad.h> // Keypad library

LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

// 4x4 Keypad
const byte ROWS = 4; // 4 Rows
const byte COLS = 4; // 4 Columns

// Keypad
char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};

// Keypad  Arduino 
byte rowPins[ROWS] = {14, 15, 16, 17}; //  Keypad  4 Rows: Row0, Row1, Row2, Row3 
byte colPins[COLS] = {18, 19, 20, 21};   //  Keypad 3  Columns: Column1, Column2, Column32,Column1
//  Keypad 
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

String messaggi[] = {
  "Hello world",
  "Ciao mondo",
  "Hola mundo",
  "Hallo welt",
  "Bonjour le monde"
};

#define PULL_UP 8
bool puls_up;
bool puls_press;

void setup() {
  lcd.begin(16, 2);
  pinMode(PULL_UP, INPUT);
}


byte jj = 0;
int pausa = 0;


void loop() {
  lcd.setCursor(0, 0);

  char key = keypad.getKey();

  lcd.print(key);

  puls_up = digitalRead(PULL_UP);

//  if ((millis()-pausa) >  1000) {
  if ((puls_up == 0) && (puls_press == 0)) {
    puls_press = 1;
//    pausa = millis();
    lcd.clear();
    lcd.setCursor(0, 1);
    lcd.print(messaggi[jj]);
    jj++;
    }
  else if (puls_up == 1)
    puls_press = 0;

  if (jj > 4)
    jj = 0;
  
  }

 



void setup(){
  Serial.begin(9600); 
}
  
void loop(){
  // Keypad 
  
  // NO_KEY 
  if (key != NO_KEY){
    Serial.println(key);
  }
}