#define BLYNK_AUTH_TOKEN "1_aKx_X3dmCZgJ0QqU41q0JXLLZlnUot"
#define BLYNK_TEMPLATE_ID "TMPL3hPyTO9tR"
#define BLYNK_TEMPLATE_NAME "ESP32 LED Ultrasonic"
#define BLYNK_PRINT Serial
#include<WiFi.h>
#include<BlynkSimpleEsp32.h>

const char ssid[] = "Redmi";
const char pass[] = "Sgr2433046";

int ledPin = 12;
int trigPin =15;
int echoPin =2;

void setup() {
  
  Serial.begin(115200);
  pinMode(ledPin, OUTPUT);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  Blynk.begin(BLYNK_AUTH_TOKEN,ssid,pass);
}

void loop() {
  Blynk.run();

  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  int duration = pulseIn(echoPin,HIGH);
  int distance = 0.034*duration/2;
  Serial.println(distance);

  Blynk.virtualWrite(V1,distance);
  delay(1000);
}

BLYNK_WRITE(V0)
{
  int value = param.asInt();
  digitalWrite(ledPin,value);
}