#include <Servo.h>

const int trigPin = 9;
const int echoPin = 8;
const int ledPin = 3;     // optionnel
const int servoPin = 10;

Servo servo;

long duration;
int distance;
bool isOpen = false;

void setup() {
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(ledPin, OUTPUT);
  
  servo.attach(servoPin);
  servo.write(0); // Poubelle fermée

  Serial.begin(9600);
}

void loop() {
  // Mesure de distance avec HC-SR04
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

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

  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.034 / 2; // Conversion en cm

  Serial.print("Distance : ");
  Serial.println(distance);

  if (distance < 15 && !isOpen) {
    servo.write(90);      // Ouvrir couvercle
    digitalWrite(ledPin, HIGH);
    isOpen = true;
    delay(3000);          // Attendre 3 secondes
  } else if (isOpen) {
    servo.write(0);       // Fermer couvercle
    digitalWrite(ledPin, LOW);
    isOpen = false;
    delay(1000);
  }

  delay(200);
}