#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd_verde(0x27,16,2);

void pantallazo(){
  lcd_verde.setCursor(0,0);
  lcd_verde.print("Sist. Embed. UNI");
  lcd_verde.setCursor(0,1);
  lcd_verde.print("Dist. con HCSR04");
  delay(3000);
  lcd_verde.clear();
}

void setup() {
  // put your setup code here, to run once:
  pinMode(2, OUTPUT);
  lcd_verde.init();
  lcd_verde.backlight();
  lcd_verde.clear();
  pantallazo();
}

void loop() {
  //envio del pulso de 10us
  digitalWrite(2, HIGH);
  delayMicroseconds(10);
  digitalWrite(2, LOW);
  float distancia_cm = (pulseIn(3, HIGH)) / 58.31;
  lcd_verde.setCursor(0,0);
  lcd_verde.print("Dist: ");
  lcd_verde.print(distancia_cm);
  lcd_verde.print(" cm  ");
  delay(500);
}