// sensor Ultrassônico Calibrado
#include <LiquidCrystal_I2C.h>
#include <Ultrasonic.h>


LiquidCrystal_I2C lcd(0x27, 16, 2);
Ultrasonic ultrasonic(12, 13);

#define trigPin 12   
#define echoPin 13   

float duration;  

float distance; 

float x;

float a;

float b;

void setup() {
// Inicia LCD
  lcd.init();
  lcd.backlight();


  pinMode(echoPin, INPUT);
  pinMode(trigPin, OUTPUT);
}

void loop() {

  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);


  duration = pulseIn(echoPin, HIGH);


  distance = ultrasonic.read();


  b = distance/100;


  x = (duration / 2) * 0.0342;


  a = x/100;



  lcd.setCursor(0, 0);


  lcd.print("Medido: ");
  lcd.print(b);
  lcd.print("m");
  lcd.print("  ");
  lcd.setCursor(0, 1);
  lcd.print("Calibrado: ");
  lcd.print(a);
  lcd.print("m");
  lcd.print("  ");

 

}