#define BLYNK_TEMPLATE_ID "TMPL31u4OlfzT"
#define BLYNK_TEMPLATE_NAME "scwms"
#define BLYNK_AUTH_TOKEN "f0eUJSm13R75TkYz8ntuM2TPPNK2rdS-"
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

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

#include <ESP32Servo.h>

BlynkTimer timer;

// Dust bin status level detection
#define echo_Pin1 34
#define trig_Pin1 35

#define echo_Pin2 32
#define trig_Pin2 25

#define echo_Pin3 26
#define trig_Pin3 27

// Servo objects for 3 bins
Servo servo_1;
Servo servo_2;
Servo servo_3;
int pos = 20; // Initial position of the servos
// Calculate the distance in percentage
long dur1, dur2, dur3;
int dis1, dis2, dis3;

void Dustbin_level()
{
  // Maximum distance for each bin
  int maxDis = 400;

  // Check the dustbin1 status
  digitalWrite(trig_Pin1, LOW);
  delayMicroseconds(2);
  digitalWrite(trig_Pin1, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig_Pin1, LOW);
  dur1 = pulseIn(echo_Pin1, HIGH);
  dis1 = dur1 * 0.034 / 2;
  int per1 = (maxDis - dis1) * 100 / maxDis;
  Blynk.virtualWrite(V3, per1);
  Serial.print(" bin 1:");
  Serial.print(per1);
  if (per1 <= 80)
  {
    Blynk.virtualWrite(V0, 0);
    Serial.println(" %");
  }
  else
  {
    servo_1.write(pos + 160);
    Blynk.virtualWrite(V0, 1);
    Serial.println(" %,the dustbin full");
  }

  // Check the dustbin2 status
  digitalWrite(trig_Pin2, LOW);
  delayMicroseconds(2);
  digitalWrite(trig_Pin2, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig_Pin2, LOW);
  dur2 = pulseIn(echo_Pin2, HIGH);
  dis2 = dur2 * 0.034 / 2;
  int per2 = (maxDis - dis2) * 100 / maxDis;
  Blynk.virtualWrite(V4, per2);
  Serial.print("dust bin 2:");
  Serial.print(per2);
  if (per2 <= 80)
  {
    Blynk.virtualWrite(V1, 0);
    Serial.println(" %");
  }
  else
  {
    servo_2.write(pos + 160);
    Blynk.virtualWrite(V1, 1);
    Serial.println(" %,the dustbin full");
  }

  // Check the dustbin3 status
  digitalWrite(trig_Pin3, LOW);
  delayMicroseconds(2);
  digitalWrite(trig_Pin3, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig_Pin3, LOW);
  dur3 = pulseIn(echo_Pin3, HIGH);
  dis3 = dur3 * 0.034 / 2;
  int per3 = (maxDis - dis3) * 100 / maxDis;
  Blynk.virtualWrite(V5, per3);
  Serial.print("dust bin 3:");
  Serial.print(per3);
  if (per3 <= 80)
  {
    Blynk.virtualWrite(V2, 0);
    Serial.println(" %");
  }
  else
  {
    servo_3.write(pos + 160);
    Blynk.virtualWrite(V2, 1);
    Serial.println(" %,the dustbin full");
  }
}

void setup()
{
  Serial.begin(115200);
  pinMode(trig_Pin1, OUTPUT);
  pinMode(echo_Pin1, INPUT);

  pinMode(trig_Pin2, OUTPUT);
  pinMode(echo_Pin2, INPUT);

  pinMode(trig_Pin3, OUTPUT);
  pinMode(echo_Pin3, INPUT);

  servo_1.attach(21);
  servo_2.attach(22);
  servo_3.attach(23);
  servo_1.write(pos);
  servo_2.write(pos);
  servo_3.write(pos);

  Blynk.begin(auth, ssid, pass);
  delay(2000);
  timer.setInterval(1000L, Dustbin_level);
}

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