/********** KODE ESP32 JEMURAN OTOMATIS + BLYNK IOT (VERSI FINAL) **********/

#define BLYNK_TEMPLATE_ID "TMPL694vPGUTA"
#define BLYNK_TEMPLATE_NAME "jemuran otomatis"
#define BLYNK_AUTH_TOKEN "i9LxDU-nxzgYu1OCAszPxjFakta7phmf"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>
#include <ESP32Servo.h>

/********** WIFI & BLYNK **********/
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

/********** PIN & KONFIGURASI **********/
#define LDR_PIN     34
#define RAIN_PIN    35
#define DHT_PIN     15
#define SERVO_PIN   27
#define BUZZER_PIN  25   // pakai LED sebagai buzzer

#define DHTTYPE DHT22
#define BUZZER_DURATION 60000   // 1 menit

/********** OBJEK **********/
Servo jemuran;
DHT dht(DHT_PIN, DHTTYPE);
BlynkTimer timer;

/********** VARIABEL GLOBAL **********/
bool statusJemuran = false;  // false = Masuk, true = Keluar
unsigned long buzzerStartTime = 0;
unsigned long beepTimer = 0;
bool buzzerAktif = false;
bool beepState = false;

/********** FUNGSI STATUS LDR **********/
String kondisiLDR(int nilaiLDR) {
  if (nilaiLDR > 3000) return "Cerah";
  else if (nilaiLDR > 1500) return "Mendung";
  else return "Gelap";
}

/********** FUNGSI STATUS HUJAN **********/
String statusHujan(int nilaiHujan) {
  return nilaiHujan < 2500 ? "Hujan" : "Kering";
}

/********** FUNGSI UTAMA **********/
void bacaSensorDanKirimBlynk() {

  int ldr  = analogRead(LDR_PIN);
  int rain = analogRead(RAIN_PIN);

  float suhu = dht.readTemperature();
  float hum  = dht.readHumidity();

  bool cerah   = ldr > 2500;
  bool mendung = ldr <= 2500 && ldr > 1500;
  bool gelap   = ldr <= 1500;
  bool hujan   = rain < 2500;

  bool buzzerOn = false;
  String status;

  /********** SERVO OTOMATIS **********/
  if (cerah && !hujan) {
    jemuran.write(0);       // keluar
    status = "Keluar";
    statusJemuran = true;
  } else {
    jemuran.write(90);      // masuk
    status = "Masuk";
    statusJemuran = false;
  }

  /********** BUZZER / LED **********/
  unsigned long sekarang = millis();

  if (hujan) {
    if (!buzzerAktif) { buzzerAktif = true; buzzerStartTime = sekarang; }
    if (sekarang - buzzerStartTime <= BUZZER_DURATION) buzzerOn = true;
    else buzzerAktif = false;
  } else if (mendung || gelap) {
    if (!buzzerAktif) { buzzerAktif = true; buzzerStartTime = sekarang; }
    if (sekarang - buzzerStartTime <= BUZZER_DURATION) {
      if (sekarang - beepTimer >= (gelap ? 800 : 300)) {
        beepTimer = sekarang;
        beepState = !beepState;
      }
      buzzerOn = beepState;
    } else buzzerAktif = false;
  } else {
    buzzerOn = false;
    buzzerAktif = false;
  }

  digitalWrite(BUZZER_PIN, buzzerOn ? HIGH : LOW); // LED sebagai buzzer

  /********** KIRIM KE BLYNK **********/
  Blynk.virtualWrite(V1, suhu);                        // Suhu
  Blynk.virtualWrite(V2, hum);                         // Kelembapan
  Blynk.virtualWrite(V3, statusJemuran ? "Keluar" : "Masuk"); // Status jemuran → teks
  Blynk.virtualWrite(V4, buzzerOn ? "0" : "1");    // Status buzzer
  Blynk.virtualWrite(V5, kondisiLDR(ldr));            // Status LDR → teks
  Blynk.virtualWrite(V6, statusHujan(rain));          // Status hujan → teks

  /********** SERIAL MONITOR **********/
  Serial.println("================================");
  Serial.print("LDR        : "); Serial.print(ldr); Serial.print(" ("); Serial.print(kondisiLDR(ldr)); Serial.println(")");
  Serial.print("Hujan      : "); Serial.print(rain); Serial.print(" → "); Serial.println(statusHujan(rain));
  Serial.print("Suhu       : "); Serial.print(suhu); Serial.println(" C");
  Serial.print("Kelembapan : "); Serial.print(hum); Serial.println(" %");
  Serial.print("Status     : "); Serial.println(status);
  Serial.print("Buzzer     : "); Serial.println(buzzerOn ? "OFF" : "ON");
  Serial.println("================================");
}

/********** SETUP **********/
void setup() {
  Serial.begin(115200);

  jemuran.attach(SERVO_PIN);
  dht.begin();

  pinMode(BUZZER_PIN, OUTPUT);  // LED sebagai buzzer
  digitalWrite(BUZZER_PIN, LOW);

  Serial.println("Sistem Jemuran Otomatis Siap");

  Blynk.begin(auth, ssid, pass);

  timer.setInterval(1000L, bacaSensorDanKirimBlynk); // tiap 1 detik
}

/********** LOOP **********/
void loop() {
  Blynk.run();
  timer.run();
}