#include "DHT.h"

#define DHTPIN 27       // pin data DHT22
#define DHTTYPE DHT22
#define LDRPIN 34       // pin analog LDR
#define LEDPIN 26       // LED sebagai kipas

DHT dht(DHTPIN, DHTTYPE);

int LDR_THRESHOLD = 200;  // semakin kecil, semakin gelap
float TEMP_THRESHOLD = 30.0; // suhu batas nyalanya LED (°C)

void setup() {
  Serial.begin(115200);
  dht.begin();
  pinMode(LEDPIN, OUTPUT);
  digitalWrite(LEDPIN, LOW);

  Serial.println("=== Greenhouse Monitor (ESP32 + LDR + DHT22) ===");
  Serial.println("LED menyala jika cahaya > ambang dan suhu > 30°C");
}

void loop() {
  // Baca sensor
  int ldrValue = analogRead(LDRPIN);     // 0–4095
  float temp = dht.readTemperature();    // °C
  float hum = dht.readHumidity();        // %

  bool bright = (ldrValue > LDR_THRESHOLD);
  bool hot = (!isnan(temp) && temp > TEMP_THRESHOLD);

  // Logika event
  if (bright && hot) {
    digitalWrite(LEDPIN, HIGH);
    Serial.println("[EVENT] Cahaya & suhu tinggi → Fan ON (LED ON)");
  } else {
    digitalWrite(LEDPIN, LOW);
    Serial.println("[OK] Kondisi normal → Fan OFF (LED OFF)");
  }

  // Tampilkan data sensor
  Serial.print("LDR_ADC="); Serial.print(ldrValue);
  Serial.print(" | Temp="); Serial.print(temp);
  Serial.print("°C | Hum="); Serial.print(hum);
  Serial.print("% | bright="); Serial.print(bright);
  Serial.print(" | hot="); Serial.println(hot);

  delay(2000); // update setiap 2 detik
}