#define BLYNK_TEMPLATE_ID "TMPL2FGDVqaE1"
#define BLYNK_TEMPLATE_NAME "Parkiran"
#define BLYNK_AUTH_TOKEN "rUyfeUuClm-ALq41XhgtPLZtXWlAhkXS"
#define BLYNK_PRINT Serial

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

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

#define trigPin 21
#define echoPin 19

long duration;
int distance;

BlynkTimer timer;

void myTimer()
{
  digitalWrite(trigPin, LOW);
  delayMicroseconds(5);

  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  duration = pulseIn(echoPin, HIGH);
  distance = duration * 0.0343/2;

  Serial.println(distance);

  if(distance < 100){
    Blynk.virtualWrite(V1, 1);
  } else {
    Blynk.virtualWrite(V1, 0);
  }
}

void setup ()
{
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  Serial.begin(115200);
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  timer.setInterval(1000L, myTimer);
}

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