#define BLYNK_TEMPLATE_ID "TMPL3wUJNpfTz"
#define BLYNK_TEMPLATE_NAME "smart dustbin"
#define BLYNK_AUTH_TOKEN "2VvbIyGexZEI0ZuWsgZexsDnnpvNCEAn"
#define BLYNK_PRINT Serial
#include <BlynkSimpleEsp32.h>
#include <WiFi.h>
#include <WiFiClient.h>

#define echoPin 32
#define trigPin 33
#include <ESP32Servo.h>
Servo servo;
BlynkTimer timer;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
long duration;
int distance; 
int binLevel=0;

void sendSensor()
{
  int ir=digitalRead(34);
  if(ir==HIGH)
  {    
      Serial.println("IR sensor triggered. Opening servo.");
    servo.write(90); // Open position
    Blynk.virtualWrite(V2, 90);
    delay(500); // Give servo time to move

    ultrasonic(false);

    Serial.println("Closing servo.");
    servo.write(0); // Close position
    Blynk.virtualWrite(V2, 0);
    delay(500); // Give servo time to move
  }
  else if (ir == LOW)
  {
    ultrasonic(true);
    delay(200);
  }
}

void ultrasonic(bool printMessage)
{
  if (printMessage) {
  Serial.println("Blynk.air updated");
  }
    digitalWrite(trigPin, LOW);
    delayMicroseconds(2);
    digitalWrite(trigPin, HIGH);
    delayMicroseconds(10);
    digitalWrite(trigPin, LOW);
    duration = pulseIn(echoPin, HIGH);
    distance = duration * 0.034 / 2; //formula to calculate the distance for ultrasonic sensor
    binLevel=map(distance, 20, 0, 0,100); // ADJUST BIN HEIGHT HERE
    binLevel = constrain(binLevel, 0, 100);


    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.print(" cm, Bin Level: ");
    Serial.print(binLevel);
    Serial.println(" %");
    binLevel = constrain(binLevel, 0, 100);
    Blynk.virtualWrite(V0, distance);
    Blynk.virtualWrite(V1, binLevel);
}

void setup()
{
  Serial.begin(9600);
  servo.attach(13);
  pinMode(34, INPUT);
  pinMode(trigPin, OUTPUT); 
  pinMode(echoPin, INPUT); 
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  delay(2000); 
  timer.setInterval(8000L, sendSensor); 
}

void loop() 
{
  Blynk.run();
  timer.run(); // Initiates SimpleTimer
}