#include <Adafruit_Sensor.h>
#include <DHT.h>
#include <DHT_U.h>

#define DHTPIN 26       // Pin data DHT22 terhubung ke pin GPIO 4 pada ESP32
#define DHTTYPE DHT22   // Tipe sensor DHT yang digunakan

DHT_Unified dht(DHTPIN, DHTTYPE);

int redLed = 18;      // Pin LED merah terhubung ke pin GPIO 2 pada ESP32
int yellowLed = 19;  // Pin LED kuning terhubung ke pin GPIO 15 pada ESP32
int greenLed = 21;   // Pin LED hijau terhubung ke pin GPIO 13 pada ESP32

void setup() {
  Serial.begin(9600);
  dht.begin();
  
  pinMode(redLed, OUTPUT);
  pinMode(yellowLed, OUTPUT);
  pinMode(greenLed, OUTPUT);
}

void loop() {
  sensors_event_t event;
  dht.temperature().getEvent(&event);
  if (!isnan(event.temperature)) {
    float suhu = event.temperature;

    digitalWrite(redLed, LOW);
    digitalWrite(yellowLed, LOW);
    digitalWrite(greenLed, LOW);

    if (suhu < 27) {
      digitalWrite(greenLed, HIGH);
    } else if (suhu < 30) {
      digitalWrite(yellowLed, HIGH);
    } else if (suhu < 35) {
      digitalWrite(redLed, HIGH);
    } else {
      blinkRedLed(500);
    }
    
    Serial.print("Suhu: ");
    Serial.println(suhu);
  }

  delay(2000);
}

void blinkRedLed(int interval) {
  static unsigned long previousMillis = 0;
  static boolean ledState = LOW;
  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    ledState = !ledState;
    digitalWrite(redLed, ledState ? HIGH : LOW);
  }
}