#define BLYNK_TEMPLATE_ID "TMPL3ZO-d0NJd"
#define BLYNK_TEMPLATE_NAME "smart waste management system"
#define BLYNK_AUTH_TOKEN "F24Wqbgr3yFpcDQMSeS5Ae_FZlSVxblI"

#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[] =  "F24Wqbgr3yFpcDQMSeS5Ae_FZlSVxblI";

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 send_blynk(int distance1, int distance2) {
  if (distance1 < 50) {
    Blynk.logEvent("bin1_full", "Bin 1 is full! Please empty it.");
    Blynk.virtualWrite(V1, 1); 
  } else { 
    Blynk.virtualWrite(V1, 0);
  }

  if (distance2 < 50) { 
    Blynk.logEvent("bin2_full", "Bin 2 is full! Please empty it.");
    Blynk.virtualWrite(V2, 1);
  } else { 
    Blynk.virtualWrite(V2, 0);
  }
}

void loop() {
  Blynk.run();

  long distance1 = measureDistance(TRIGGER_PIN_1, ECHO_PIN_1);
  long distance2 = measureDistance(TRIGGER_PIN_2, ECHO_PIN_2);
  
  long fillLevel1 = 400 - distance1; // Assuming 400 cm as the max depth of the bin
  long fillLevel2 = 400 - distance2; // Adjust this value according to your bin's height
  
  Serial.print("Bin1 fill level: ");
  Serial.print(fillLevel1);
  Serial.print(" cm | Bin2 fill level: ");
  Serial.print(fillLevel2);
  Serial.println(" cm");
  
  Blynk.virtualWrite(V1, fillLevel1); // Send fill level 1 to Blynk app
  Blynk.virtualWrite(V2, fillLevel2); // Send fill level 2 to Blynk app

  // Control LED 1 and buzzer 1 based on distance from sensor 1
  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
    tone(BUZZER_PIN_1, 1000); // Turn on buzzer 1
  } else {
    digitalWrite(LED_PIN_1_ON, LOW); // Turn off LED 1
    digitalWrite(LED_PIN_1_OFF, HIGH); // Turn on LED 1
    noTone(BUZZER_PIN_1); // Turn off buzzer 1
  }

  // Control LED 2 and buzzer 2 based on distance from sensor 2
  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
    tone(BUZZER_PIN_2, 1000); // Turn on buzzer 2
  } else {
    digitalWrite(LED_PIN_2_ON, LOW); // Turn off LED 2
    digitalWrite(LED_PIN_2_OFF, HIGH); // Turn on LED 2
    noTone(BUZZER_PIN_2); // Turn off buzzer 2
  }

  send_blynk(distance1, distance2);

  delay(1000); // Delay for stability
}

long measureDistance(int tp, int ep) {
  digitalWrite(tp, LOW);
  delayMicroseconds(2);
  digitalWrite(tp, HIGH);
  delayMicroseconds(10);
  digitalWrite(tp, LOW);

  long duration = pulseIn(ep, HIGH);
  long distance = duration * 0.034 / 2;

  return distance;
}