#define BLYNK_TEMPLATE_ID "TMPL3NPgeP4Jw"
#define BLYNK_TEMPLATE_NAME "ultrasonic servo blynk"
#define BLYNK_AUTH_TOKEN "WX_TVmYeeWfnLO_fpwl6Yvw3Z7wu8Pek"
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <ESP32Servo.h>

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

const int trigPin = 12;
const int echoPin = 14;
const int ledPin = 13;
const int servoPin = 16;
long duration;
int distance;
Servo myServo;

BLYNK_WRITE(V1) {
  int servoPosition = param.asInt();
    myServo.write(servoPosition);
    }

    void setup() {
      pinMode(trigPin, OUTPUT);
        pinMode(echoPin, INPUT);
          pinMode(ledPin, OUTPUT);
            myServo.attach(servoPin);
              Serial.begin(9600);
                Blynk.begin(auth, ssid, pass);
                }

                void loop() {
                  digitalWrite(trigPin, LOW);
                    delayMicroseconds(2);
                      digitalWrite(trigPin, HIGH);
                        delayMicroseconds(10);
                          digitalWrite(trigPin, LOW);
                            duration = pulseIn(echoPin, HIGH);
                              distance = duration * 0.034 / 2;
                                Serial.print("Distance=");
                                  Serial.println(distance);

                                    Blynk.run();

                                      Blynk.virtualWrite(V0, distance);

                                        delay(500);
                                        }