#include <DHT.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

int redLed = 25;
int blueLed = 33;
int whiteLed = 32;
int buzzPin = 26;

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

DHT dht(23, DHT22);

void setup() {
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3c)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }

  dht.begin();

  pinMode(redLed, OUTPUT);
  pinMode(blueLed, OUTPUT);
  pinMode(whiteLed, OUTPUT);
  pinMode(buzzPin, OUTPUT);
}

void loop() {
  delay(10); // this speeds up the simulation

  float tempC = dht.readTemperature();
  float tempF = tempC * 9 / 5 + 32;    // Convert to Fahrenheit
  float tempK = tempC + 273.15;
  float humidity = dht.readHumidity();

  if (isnan(tempC) || isnan(humidity)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  if (tempC <= 15 && humidity <= 10) {
    digitalWrite(whiteLed, HIGH);
    tone(buzzPin, 1000);  // Continuous tone
  } else if (tempC > 15 && tempC <= 27 && humidity > 10 && humidity <= 50) {
    digitalWrite(blueLed, HIGH);
    noTone(buzzPin);  // Stop the buzzer
  } else if (tempC > 27 && humidity >= 51) {
    digitalWrite(redLed, HIGH);
    tone(buzzPin, 1000);  // Continuous tone
  } else {
    digitalWrite(redLed, LOW);
    digitalWrite(blueLed, LOW);
    digitalWrite(whiteLed, LOW);
    noTone(buzzPin);  // Stop the buzzer
    oled.clearDisplay();
    oled.setTextSize(1);
    oled.setTextColor(WHITE);
    oled.setCursor(0, 0);
    oled.println("Menyala abangkuu!!!");
    oled.display();
  }

  displayTemperature(tempC, tempF, tempK);

  // Turn off LEDs for next cycle
  digitalWrite(redLed, LOW);
  digitalWrite(blueLed, LOW);
  digitalWrite(whiteLed, LOW);

  delay(2000); // Delay before the next reading
}

void displayTemperature(float celsius, float fahrenheit, float kelvin) {
  oled.clearDisplay();
  oled.setTextSize(1);
  oled.setTextColor(WHITE);
  oled.setCursor(0, 0);
  oled.print("Celsius: ");
  oled.println(celsius);
  oled.print("Fahrenheit: ");
  oled.println(fahrenheit);
  oled.print("Kelvin: ");
  oled.println(kelvin);
  oled.display();
}