//Sensor Ultrasonic
//By : Silma Kamilah
#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPLWVkFj45f"
#define BLYNK_DEVICE_NAME "Smart Home"
#define trig 15
#define echo 4
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
char auth[] = "pYSNHEYo67RDxcziaCclD1p5cUYWr2UL";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
BlynkTimer timer;

void setup() {
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
timer.setInterval(100L, ultrasonic);
}

void ultrasonic() {
  digitalWrite(trig, LOW);
  delayMicroseconds(4);
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);
  long t = pulseIn(echo, HIGH);
  long cm = t / 29 / 2;
  Blynk.virtualWrite(V1, cm);
}

void loop() {
  Blynk.run();
  timer.run();
}