// 1. Identitas Blynk
#define BLYNK_TEMPLATE_ID "TMPL6dVXwuhpd"
#define BLYNK_TEMPLATE_NAME "IOT Sensor Jarak"
#define BLYNK_AUTH_TOKEN "reyd5rn4nMnTd-BvX4hCrdWJUks-AHt5"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>

// 2. Konfigurasi WiFi & Sensor
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

//3. Pin ESP32 yang digunakan
LiquidCrystal_I2C lcd (0x27, 16, 2);
int echoPin = 12;
int trigPin = 13;
int ledM = 15;
int ledK = 16;
int ledH = 4;

BlynkTimer timer;

void cekjarak(){
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  long durasi = pulseIn(echoPin,HIGH);
  int jarak = durasi * 0.0343/2;

  String status;

  if(jarak < 50 ){
    digitalWrite(ledM, HIGH);
    digitalWrite(ledK, LOW);
    digitalWrite(ledH, LOW);
    status = "Terlalu dekat";

    Blynk.virtualWrite(V2, 255);
    Blynk.virtualWrite(V3, 0);
    Blynk.virtualWrite(V4, 0);

  }else if(jarak < 100 ){
    digitalWrite(ledM, LOW);
    digitalWrite(ledK, HIGH);
    digitalWrite(ledH, LOW);
    status = "Masih Jauh";

    Blynk.virtualWrite(V2, 0);
    Blynk.virtualWrite(V3, 255);
    Blynk.virtualWrite(V4, 0);

  } else{
    digitalWrite(ledM, LOW);
    digitalWrite(ledK, LOW);
    digitalWrite(ledH, HIGH);
    status = "Aman ";

    Blynk.virtualWrite(V2, 0);
    Blynk.virtualWrite(V3, 0);
    Blynk.virtualWrite(V4, 255);
  }

  lcd.setCursor (0,0);
  lcd.print("jarak:");
  lcd.print(jarak);
  lcd.print("Cm");

  lcd.setCursor (0,1);
  lcd.print("status:");
  lcd.print(status);
  delay(500);

  Blynk.virtualWrite(V0, jarak);
  Blynk.virtualWrite(V1, status);
  }
  

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  
  lcd.init();
  lcd.clear();
  lcd.backlight();

  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(ledM, OUTPUT);
  pinMode(ledK, OUTPUT);
  pinMode(ledH, OUTPUT);

  Blynk.begin(auth, ssid, pass);
  timer.setInterval(500L, cekjarak);

}

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