#define BLYNK_TEMPLATE_ID "TMPL3g-C2Rb1s"
#define BLYNK_TEMPLATE_NAME "SMART CAMPUS waste management system"
#define BLYNK_AUTH_TOKEN "3yKGFQ8KT-iOA8vI81tKuUwCuykEZlCv"
#define TRIGGER_PIN_1 12 
#define ECHO_PIN_1 14 
#define TRIGGER_PIN_2 16 
#define ECHO_PIN_2 17 
#define LED_PIN_1_ON 2 
#define LED_PIN_1_OFF 0 
#define LED_PIN_2_ON 4 
#define LED_PIN_2_OFF 5 
#define BUZZER_PIN_1 32 
#define BUZZER_PIN_2 33 
#include<Ultrasonic.h>
#include<BlynkSimpleEsp32.h>
Ultrasonic ultrasonic1(TRIGGER_PIN_1, ECHO_PIN_1);
Ultrasonic ultrasonic2(TRIGGER_PIN_2, ECHO_PIN_2);
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
char auth[] = "3yKGFQ8KT-iOA8vI81tKuUwCuykEZlCv";
void setup() {
  Serial.begin(9600);
  pinMode(LED_PIN_1_ON, OUTPUT); 
  pinMode(LED_PIN_1_OFF, OUTPUT); 
  pinMode(LED_PIN_2_ON, OUTPUT); 
  pinMode(LED_PIN_2_OFF, OUTPUT);
  pinMode(BUZZER_PIN_1, OUTPUT); 
  pinMode(BUZZER_PIN_2, OUTPUT); 
  Blynk.begin(auth, ssid, pass);
}
void loop() {
  Blynk.run();
  long distance1 = measureDistance(TRIGGER_PIN_1, ECHO_PIN_1);
  long distance2 = measureDistance(TRIGGER_PIN_2, ECHO_PIN_2);
  long a = 399 - distance1;
  long b = 399 - distance2; 
  Serial.print("Bin1 fill level: ");
  Serial.print(a);
  Serial.print(" cm | Bin2 fill level: ");
  Serial.print(b);
  Serial.println(" cm");
  Blynk.virtualWrite(V1, a ); // Send distance 1 to Blynk app
  Blynk.virtualWrite(V2, b); 
  if (distance1 < 50) {
    Serial.println("Bin1 is full!!. Don't  put waste on it!!");
    digitalWrite(LED_PIN_1_ON, HIGH); // Turn on LED 1
    digitalWrite(LED_PIN_1_OFF, LOW); // Turn off LED 1
    digitalWrite(BUZZER_PIN_1, HIGH);
    tone(BUZZER_PIN_1, 100);
  } else {
    digitalWrite(LED_PIN_1_ON, LOW); // Turn off LED 1
    digitalWrite(LED_PIN_1_OFF, HIGH); // Turn on LED 1
    digitalWrite(BUZZER_PIN_1, LOW); // Turn off buzzer 1
  }
  if (distance2 < 50) {
    Serial.println("Bin2 is full!!. Don't  put waste on it!!");
    digitalWrite(LED_PIN_2_ON, HIGH); // Turn on LED 2
    digitalWrite(LED_PIN_2_OFF, LOW); // Turn off LED 2
    digitalWrite(BUZZER_PIN_2, HIGH); // Turn on buzzer 2
    tone(BUZZER_PIN_2, 100);
  } else {
    digitalWrite(LED_PIN_2_ON, LOW); // Turn off LED 2
    digitalWrite(LED_PIN_2_OFF, HIGH); // Turn on LED 2
    digitalWrite(BUZZER_PIN_2, LOW); // Turn off buzzer 2
  }
  delay(1000);
}
long measureDistance(int tp, int ep)
{
  digitalWrite(tp, LOW);
  delay(2);
  digitalWrite(tp, HIGH);
  delay(10);
  digitalWrite(tp, LOW);
  long duration = pulseIn(ep, HIGH);
  long distance = duration * 0.034 / 2 ;
  return distance;
}