#define BLYNK_PRINT Serial

#define BLYNK_TEMPLATE_ID "TMPL3U6YwO69u"
#define BLYNK_TEMPLATE_NAME "servo"
#define BLYNK_AUTH_TOKEN "mFoFVIw6n0s46q7a4HVSVnT8JMkvhgBS"

#include <WiFi.h>
#include<WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <ESP32Servo.h>
Servo myservo;

char auth[]=BLYNK_AUTH_TOKEN;
char ssid[]="Wokwi-GUEST";
char pass[]="";
const int trigPin=26;
const int echoPin=25;
long duration;
int distance;




int servoVal=0;

BLYNK_WRITE(V0){
  servoVal=param.asInt();
  Serial.print(servoVal);
  Serial.println("*");
  myservo.write(servoVal);

}

void setup() {
  // put your setup code here, to run once:
  
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  myservo.attach(18);
  Serial.begin(9600);
  Blynk.begin(auth,ssid,pass);
 
}

void loop() {
  // put your main code here, to run repeatedly:
  Blynk.run();

  digitalWrite(trigPin,0);
  delayMicroseconds(2);
  digitalWrite(trigPin,1);
  delayMicroseconds(10);
  digitalWrite(trigPin,0);
  duration=pulseIn(echoPin,HIGH);
  distance=duration*0.034/2;
  Blynk.virtualWrite(V1,distance);
  // delay(10); // this speeds up the simulation
}