#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 20, 4);

#define pin_button 7

void setup() {
  // put your setup code here, to run once:
  lcd.init();
  lcd.backlight();
  pinMode(pin_button, INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:
    
    lcd.setCursor(2, 1);
    lcd.print(digitalRead(pin_button));
}