#include<NewPing.h>
#include<LiquidCrystal_I2C.h>
#define TRIGGER_PIN  9  
#define ECHO_PIN     8  
#define MAX_DISTANCE 450
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);
LiquidCrystal_I2C lcd(0x27, 16, 2);

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

void loop() {
  int distancia = sonar.ping_cm();
  lcd.setCursor(0, 0);
  lcd.print("Distancia: ");
  lcd.print(distancia);
  lcd.print("cm    ");
  delay(100);
}