#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL32FPsVl1x"
#define BLYNK_TEMPLATE_NAME "ultra sonic and servo motor"
#define BLYNK_AUTH_TOKEN "R1hhl1XIXHRmb7mUldSpuXiyaaXOkNk5"
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "144HZ";
char pass[] = "NOT FOUND";

#define trigPin 18
#define echoPin 19

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);

  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() {
  Blynk.run();
  
  long duration, distance;
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration * 0.0343) / 2;
  if (distance >= 400 || distance <= 2) {
    Serial.println("Out of range");
  } else {
    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.println(" cm");
    Blynk.virtualWrite(V1, distance); // Send the distance value to virtual pin V1 in the Blynk app
  }
  delay(1000);
}