#include <Servo.h>

#define ledocupado 4
#define ledlivre 2

const int trig = 9;
const int echo = 10;

void setup() {
  Serial.begin(115200);
  
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);

  pinMode(ledocupado, OUTPUT);
  pinMode(ledlivre, OUTPUT);
}

void loop (){
  long duration, distance;

  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);

  duration = pulseIn(echo, HIGH);

  distance = duration * 0.034 / 2;

//VV  comando dos leds: VV\\

  if (distance <= 280) {
    digitalWrite(ledlivre, LOW);
    delay(5000);
    digitalWrite(ledocupado, HIGH);
  } else {
    digitalWrite(ledocupado, LOW);
    digitalWrite(ledlivre, HIGH);
  }



  Serial.print("distancia: ");
  Serial.print(distance);
  Serial.println(" cm");

  delay(500);
}