#define BLYNK_TEMPLATE_ID "TMPL3rtiveUJP"
#define BLYNK_TEMPLATE_NAME "dustbin"
#define BLYNK_AUTH_TOKEN "pvE3-QkJmwYfh_VBKlYHflSiMWYxXKl7"



#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <ESP32Servo.h>

char ssid[] = "Wokwi-GUEST";
char pass[] = "";

BlynkTimer timer;

Servo myServo;

const int trigPin = 5;
const int echoPin = 18;
const int buzzer = 12;

long duration;
int distance;

void sendSensorData()
{
  // Trigger ultrasonic sensor
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

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

  digitalWrite(trigPin, LOW);

  duration = pulseIn(echoPin, HIGH);

  distance = duration * 0.034 / 2;

  Serial.print("Distance = ");
  Serial.print(distance);
  Serial.println(" cm");

  // Send distance
  Blynk.virtualWrite(V0, distance);

  if (distance < 20)
  {
    Serial.println("LID OPEN");

    myServo.write(90);

    tone(buzzer, 1000);

    Blynk.virtualWrite(V1, "OPEN");
    Blynk.virtualWrite(V2, 1);
  }
  else
  {
    Serial.println("LID CLOSED");

    myServo.write(0);

    noTone(buzzer);

    Blynk.virtualWrite(V1, "CLOSED");
    Blynk.virtualWrite(V2, 0);
  }
}

void setup()
{
  Serial.begin(115200);

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

  pinMode(buzzer, OUTPUT);

  myServo.attach(13);
  myServo.write(0);

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

  timer.setInterval(1000L, sendSensorData);
}

void loop()
{
  Blynk.run();
  timer.run();
}