#include <DHT.h>

#define DHTPIN 15         // Pin data sensor DHT
#define DHTTYPE DHT22     // Ganti dengan DHT22 jika pakai DHT22
DHT dht(DHTPIN, DHTTYPE);

const int ledPin = 2;
const int buttonPin = 4;

unsigned long previousMillis = 0;
const unsigned long interval = 10000;  // 10 detik
const unsigned long ledOnTime = 2000;  // 2 detik

bool ledAutoState = false;
bool ledManualState = false;
unsigned long ledOnStartTime = 0;

float humidity = 0;
const float humidityThreshold = 80.0;  // ambang batas kelembapan tinggi

void setup() {
  Serial.begin(115200);
  pinMode(ledPin, OUTPUT);
  pinMode(buttonPin, INPUT_PULLUP); // Tombol aktif LOW
  dht.begin();
  digitalWrite(ledPin, LOW);
}

void loop() {
  unsigned long currentMillis = millis();

  // Baca kelembapan setiap loop (atau bisa dibuat interval baca sendiri)
  humidity = dht.readHumidity();

  // Validasi pembacaan sensor
  if (isnan(humidity)) {
    Serial.println("Gagal membaca dari sensor DHT!");
    return;
  }

  Serial.print("Kelembapan: ");
  Serial.print(humidity);
  Serial.println(" %");

  bool kelembapanTinggi = humidity > humidityThreshold;

  // === TIMER OTOMATIS LED ===
  if (!ledAutoState && (currentMillis - previousMillis >= interval)) {
    previousMillis = currentMillis;

    if (!kelembapanTinggi) {
      digitalWrite(ledPin, HIGH);
      ledAutoState = true;
      ledOnStartTime = currentMillis;
    } else {
      Serial.println("Kelembapan tinggi - LED otomatis tidak menyala.");
    }
  }

  if (ledAutoState && (currentMillis - ledOnStartTime >= ledOnTime)) {
    digitalWrite(ledPin, LOW);
    ledAutoState = false;
  }

  // === TOMBOL MANUAL LED ===
  if (digitalRead(buttonPin) == LOW && !ledManualState) {
    if (!kelembapanTinggi) {
      digitalWrite(ledPin, HIGH);
      ledManualState = true;
      ledOnStartTime = currentMillis;
    } else {
      Serial.println("Kelembapan tinggi - LED manual tidak menyala.");
    }
  }

  if (ledManualState && (currentMillis - ledOnStartTime >= ledOnTime)) {
    digitalWrite(ledPin, LOW);
    ledManualState = false;
  }

  delay(100); // Hindari pembacaan terlalu cepat
}