#define BLYNK_TEMPLATE_ID "TMPL6FsIxpYoL"
#define BLYNK_TEMPLATE_NAME "SR04 BLYNK IOT"
#define BLYNK_AUTH_TOKEN "cwJhWhXoWr3tiyt_I2DPmTD9wDLRo3O4"
#define BLYNK_PRINT Serial
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#define TRIG_PIN 17 
#define ECHO_PIN 16

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
}
void loop() {
 long duration, distance;
 digitalWrite(TRIG_PIN, LOW);
 delayMicroseconds(2);
 digitalWrite(TRIG_PIN, HIGH);
 delayMicroseconds(10);
digitalWrite(TRIG_PIN, LOW);
duration = pulseIn(ECHO_PIN, HIGH);
distance =1+ (duration * 0.034 / 2);
Serial.print("Distance: ");
 Serial.print(distance);
Serial.println(" cm");
delay(200);
Blynk.virtualWrite(Vo, distance);
Blynk.run();
}