#define BLYNK_TEMPLATE_ID "TMPL60d3dXT6w"
#define BLYNK_TEMPLATE_NAME "Jarak"
#define BLYNK_AUTH_TOKEN "bh5GPHfHBbESubAoIXrD4Y3ftG1-vi0m"
#define Jarak V1
#define BLYNK_PRINT Serial

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp8266.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h> 
LiquidCrystal_I2C lcd(0x27,16,2);

const int TrigPin = 8;
const int EchoPin = 9;
float timer, jarak;

void setup() {
  lcd.init();
  lcd.backlight();
 Serial.begin(9600);
 pinMode(EchoPin, INPUT);
 pinMode(TrigPin, OUTPUT);
 Blynk.begin(AUTH_TOKEN,TEMPLATE_NAME,BLYNK_TEMPLATE_ID);
}
 
 void loop() {
 Blynk.run();
 digitalWrite(TrigPin, LOW);
 delayMicroseconds(2);
 digitalWrite(TrigPin, HIGH);
 delayMicroseconds(10);
 digitalWrite(TrigPin, LOW);

  timer = pulseIn(EchoPin,HIGH);
  jarak = timer/58;
  delay(100);

  Blynk.virtualWrite(VIRTUAL_DISTANCE_PIN, jarak);

  if (jarak <= 20 )
  {
  lcd.setCursor (4,0);
  lcd.print("              ");
  delay(1000);
  lcd.setCursor (4,0);
  lcd.print("Terbuka");
  delay(3000);
  }
  else 
  {
  lcd.setCursor (4,0);
  lcd.print("              ");
  delay(1000);
  lcd.setCursor (4,0);
  lcd.print("Tertutup");
  delay(3000);}
 }