#define BLYNK_TEMPLATE_ID "TMPL3XdPBkykg"
#define BLYNK_TEMPLATE_NAME "Ultrasonic"
#define BLYNK_AUTH_TOKEN "fLQFV8uck684CuR23ZnKLZbPA2LfVhOM"
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <NewPing.h>


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

// Your Blynk authentication token
char auth[] = "fLQFV8uck684CuR23ZnKLZbPA2LfVhOM";

// Define the GPIO pins for the ultrasonic sensor
#define trigPin 13
#define echoPin 12

// Create an instance of the NewPing library
NewPing sonar(trigPin, echoPin);

void setup() {
  Serial.begin(115200);

  Blynk.begin(auth, ssid, pass);

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

void loop() {
  Blynk.run();

  
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  
  unsigned int distance_cm = sonar.ping_cm();

  // Send the distance data to Blynk
  Blynk.virtualWrite(V0, distance_cm);  // Use V1 as a display widget in your Blynk app

  Serial.print("Distance: ");
  Serial.print(distance_cm);
  Serial.println(" cm");

  delay(1000); // Delay between measurements
}