#define BLYNK_TEMPLATE_ID "TMPL6GcEnVTej"
#define BLYNK_TEMPLATE_NAME "DISTANCE SENSOR"
#define BLYNK_AUTH_TOKEN "9qEq24_LWbrm2mj-LvJX_nud3Xxkfa7B"

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

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Haha";
char pass[] = "patotieee";

#define TRIGPIN 26
#define ECHOPIN 27
#define LEDPIN 32

float echoDuration;
float distanceCm;

void setup() {
  // Initialize BLYNK (connect to internet)
  Blynk.begin(auth, ssid, pass);

  pinMode(TRIGPIN, OUTPUT);
  pinMode(ECHOPIN, INPUT);
  pinMode(LEDPIN, OUTPUT);
}

void loop() {
  // Clears the trigPin
  digitalWrite(TRIGPIN, LOW);
  delayMicroseconds(2);
 
  // Send pulse signal
  digitalWrite(TRIGPIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIGPIN, LOW);
  
  // Receive the pulse sent
  echoDuration = pulseIn(ECHOPIN, HIGH);
  
  // Calculate the distance in Centimeter
  distanceCm = echoDuration * 0.034 / 2;

  // Display the distance value in BLYNK Dashboard
  Blynk.virtualWrite(V0, distanceCm);

  if(distanceCm < 50) {
    digitalWrite(LEDPIN, HIGH);
  } else {
    digitalWrite(LEDPIN, LOW);
  }
}