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

#define LDR_PIN 34
#define POT_PIN 35     
#define TRIG_PIN 5      
#define ECHO_PIN 18     
#define DHTPIN 15
#define DHTTYPE DHT22

#define LED_HIJAU 27 
#define LED_MERAH 14 
#define BUZZER_PIN 26 
#define SERVO_PIN 25 

DHT dht(DHTPIN, DHTTYPE);
Servo myservo;

void setup() {
  Serial.begin(115200);
  
  pinMode(LED_HIJAU, OUTPUT);
  pinMode(LED_MERAH, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  
  dht.begin();
  myservo.attach(SERVO_PIN);
  
  myservo.write(0);
  digitalWrite(LED_HIJAU, HIGH);
  digitalWrite(LED_MERAH, LOW);
  
  Serial.println(">>> SIMULASI GREENHOUSE: PERBAIKAN BUZZER <<<");
}

void loop() {
  int ldrValue = analogRead(LDR_PIN);
  
  int airRaw = analogRead(POT_PIN); 
  int airPercent = map(airRaw, 0, 4095, 0, 100); 
  
  float t = dht.readTemperature();
  float h = dht.readHumidity();

  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  long duration = pulseIn(ECHO_PIN, HIGH, 20000); 
  float tanahDistance = (duration == 0) ? 400 : (duration * 0.034 / 2);

  bool ldrBahaya = (ldrValue < 500);
  bool suhuBahaya = (t < 40);
  bool lembapBahaya = (h < 50);
  
  bool airBahaya = (airPercent < 50); 
  
  bool tanahBahaya = (tanahDistance < 200);

  if (ldrBahaya) {
    myservo.write(90);
  } else {
    myservo.write(0);
  }
  if (suhuBahaya || lembapBahaya || tanahBahaya) {
    digitalWrite(LED_MERAH, HIGH);
    digitalWrite(LED_HIJAU, LOW);
  } else {
    digitalWrite(LED_MERAH, LOW);
    digitalWrite(LED_HIJAU, HIGH);
  }

  if (airBahaya) {
    digitalWrite(BUZZER_PIN, HIGH);
  } else {
    digitalWrite(BUZZER_PIN, LOW);
  }

  Serial.print("LDR:"); Serial.print(ldrValue);
  Serial.print(ldrBahaya ? " [!] " : " [V] ");
  
  Serial.print("| T/H:"); Serial.print(t); Serial.print("/"); Serial.print(h);
  Serial.print((suhuBahaya || lembapBahaya) ? " [!] " : " [V] ");
  
  Serial.print("| Tanah:"); Serial.print(tanahDistance);
  Serial.print(tanahBahaya ? " [!] " : " [V] ");
  
  Serial.print("| Air:"); Serial.print(airPercent); Serial.print("%");
  Serial.println(airBahaya ? " [!] ALARM" : " [V]");

  delay(1000); 
}