#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#define BLYNK_PRINT Serial

#define  trig  23
#define  echo  22

long duration;
int distance;

// You should get Auth Token in the Blynk App.

char auth[] = "Qnh92oD_PlDvQMexKWGgPDUcK_0nNiGK";
char ssid[] = "Wokwi-GUEST";   // your ssid
char pass[] = ""; // your wifi pass

BlynkTimer timer;

void setup()
{
  // Debug console
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(trig, OUTPUT);  // Sets the trigPin as an Output
  pinMode(echo, INPUT);   // Sets the echoPin as an Inpu
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);

 timer.setInterval(1000L, sendSensor);
}

void loop()
{
  Blynk.run();
  timer.run();
}
void sendSensor()
{
  digitalWrite(trig, LOW);   // Makes trigPin low
  delayMicroseconds(2);       // 2 micro second delay

  digitalWrite(trig, HIGH);  // tigPin high
  delayMicroseconds(10);      // trigPin high for 10 micro seconds
  digitalWrite(trig, LOW);   // trigPin low

  duration = pulseIn(echo, HIGH);   //Read echo pin, time in microseconds
  distance = duration * 0.034 / 2;   //Calculating actual/real distance

  Serial.print("Distance = ");        //Output distance on arduino serial monitor
  Serial.println(distance);

  if(distance >=0)
  {
    digitalWrite(2, HIGH);
  }
  if(distance >=100)
  {
    digitalWrite(2, LOW);
  }
  if(distance >=100)
  {
    digitalWrite(4, HIGH);
    }
  if(distance <=100)
  {
    digitalWrite(4, LOW);
  }
    if(distance >=200)
    {
      digitalWrite(4, LOW);
   }
   if(distance >=200)
   {
    digitalWrite(5, HIGH);
   }
   if(distance >=300)
   {
    digitalWrite(5, LOW);
    }
  if(distance <=200)
  {
    digitalWrite(5, LOW);
  }
   if(distance >=300)
   {
    digitalWrite(18, HIGH);
   }
   else{
    digitalWrite(18, LOW);
   }
  Blynk.virtualWrite(V0, distance);
  delay(1000);                        //Pause for 3 seconds and start measuring distance again
}