#include <LiquidCrystal_I2C.h>
#include <Keypad.h>

//lcd parámetros 
#define I2C_ADDR 0x27
#define LCD_COLUMNS 20
#define LCD_LINES 4
//lcd
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES); 

//Keypad
const byte columnas = 4; 
const byte lineas = 4;
//Declarar pines
byte columnaPin[columnas] = {A0, A1, A2, A3}; 
byte lineaPin[lineas] = {7,6,5,4};

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

Keypad keypad = Keypad(makeKeymap(keys), lineaPin, columnaPin, lineas, columnas);

//Cursor
int i=0;
int j=0;

void setup() {
  // lcd
lcd.init();
lcd.backlight();
lcd.clear();
}

void loop() {
char tecla= keypad.getKey();
lcd.setCursor(i,j);

if(tecla){
lcd.print(tecla);
i++;
 if(i>15){
 i=0;
 j++;
 }
}else if(i==0 && j==2){
 lcd.clear();
 i=0;
 j=0; 
}
}


//funciones pedorras T_T
/*
void cara(){
lcd.clear();
lcd.setCursor(3,0);
lcd.print("T");
lcd.setCursor(13,0);
lcd.print("T");
lcd.setCursor(7,1);
lcd.print("___");
delay(1000);
parpadeo();
delay(75);
}
void parpadeo(){
lcd.clear();
lcd.setCursor(3,0);
lcd.print("__");
lcd.setCursor(13,0);
lcd.print("__");
lcd.setCursor(7,1);
lcd.print("___");
lcd.clear();
}*/