#include <DHT.h>
#include <LiquidCrystal_I2C.h>
#define DHTPIN 13    // Digital pin connected to the DHT sensor
#define DHTTYPE DHT22 // Type of DHT sensor
#define RED_PIN 1   // Digital pin connected to the red LED of RGB
#define GREEN_PIN 2  // Digital pin connected to the green LED of RGB
#define BLUE_PIN 3  // Digital pin connected to the blue LED of RGB
#define BUZZER_PIN 9 // Digital pin connected to the buzzer
#define I2C_ADDR    0x27
#define LCD_COLUMNS 10
#define LCD_LINES   11
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

void setup() {
  pinMode(RED_PIN, OUTPUT);
  pinMode(GREEN_PIN, OUTPUT);
  pinMode(BLUE_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  
  lcd.begin(16, 2);
  dht.begin();
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  lcd.clear();
  lcd.setCursor(0, 0);

  if (temperature > 15.0) {
    // Red light, buzzer, and display temperature and humidity
    digitalWrite(RED_PIN, HIGH);
    digitalWrite(GREEN_PIN, LOW);
    digitalWrite(BLUE_PIN, LOW);
    tone(BUZZER_PIN, 1000); // Turn on buzzer
    lcd.print("Temp > 15C");
    lcd.setCursor(0, 1);
    lcd.print("Temp: ");
    lcd.print(temperature);
    lcd.print("C  Humidity: ");
    lcd.print(humidity);
  } else if (temperature == 15.0) {
    // Blue light and display temperature and humidity
    digitalWrite(RED_PIN, LOW);
    digitalWrite(GREEN_PIN, LOW);
    digitalWrite(BLUE_PIN, HIGH);
    noTone(BUZZER_PIN); // Turn off buzzer
    lcd.print("Temp = 15C");
    lcd.setCursor(0, 1);
    lcd.print("Temp: ");
    lcd.print(temperature);
    lcd.print("C  Humidity: ");
    lcd.print(humidity);
  } else {
    // Green light and display temperature and humidity
    digitalWrite(RED_PIN, LOW);
    digitalWrite(GREEN_PIN, HIGH);
    digitalWrite(BLUE_PIN, LOW);
    noTone(BUZZER_PIN); // Turn off buzzer
    lcd.print("Temp < 15C");
    lcd.setCursor(0, 1);
    lcd.print("Temp: ");
    lcd.print(temperature);
    lcd.print("C  Humidity: ");
    lcd.print(humidity);
  }

  delay(2000); // Delay for 2 seconds between readings
}