#include <DHT.h>
#include <LiquidCrystal.h>

#define DHTPIN 2
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

// Initialize the LCD with the numbers of the interface pins
LiquidCrystal lcd(7, 6, 5, 4, 3, 2);

const int redLED = 10;
const int greenLED = 11;
const int blueLED = 12;

void setup() {
  // Add a delay before initializing the LCD
  delay(500);

  // Start the LCD
  lcd.begin(16, 2);

  // Clear the LCD
  lcd.clear();

  // Print a message to the LCD.
  lcd.print("Initializing...");
    delay(500);
    lcd.clear();
  // Initialize the DHT sensor
  dht.begin();
  // Set up the LED pins
  pinMode(redLED, OUTPUT);
  pinMode(greenLED, OUTPUT);
  pinMode(blueLED, OUTPUT);
  
  // Start the serial communication for debugging purposes
  Serial.begin(9600);
}

void loop() {
  // Wait a few seconds between measurements
  delay(2000);

  // Reading temperature and humidity
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();
  
  // Check if any reads failed and exit early (to try again)
  if (isnan(humidity) || isnan(temperature)) {
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Error reading");
    lcd.setCursor(0, 1);
    lcd.print("sensor data");
    return;
  }

  // Display temperature and humidity on LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C");
  
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print(" %");

  // Control LEDs based on temperature
  if (temperature > 30) {
    digitalWrite(redLED, HIGH);
    digitalWrite(greenLED, LOW);
    digitalWrite(blueLED, LOW);
  } else if (temperature >= 20) {
    digitalWrite(redLED, LOW);
    digitalWrite(greenLED, HIGH);
    digitalWrite(blueLED, LOW);
  } else {
    digitalWrite(redLED, LOW);
    digitalWrite(greenLED, LOW);
    digitalWrite(blueLED, HIGH);
  }

  // For debugging: Print temperature and humidity to the serial monitor
  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.print(" C, Humidity: ");
  Serial.print(humidity);
  Serial.println(" %");
}