#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

#define DHTPIN 1  
#define DHTTYPE DHT22

DHT dht(DHTPIN, DHTTYPE);

#define RED_LED_PIN 11
#define GREEN_LED_PIN 12
#define BLUE_LED_PIN 13

LiquidCrystal_I2C lcd(0x27, 16, 2);

void setup() {
  
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);
  pinMode(BLUE_LED_PIN, OUTPUT);
  
  Serial.begin(9600);
  dht.begin();
 
  // Initialize the LCD
  lcd.init();
  lcd.backlight();
  
  // Initialize LED pins as outputs
  
  
  // Print a message to the LCD.
  lcd.print("Temp & Humidity");
}

void loop() {
  // Wait a few seconds between measurements.
  delay(2000);
  lcd.print("Temp & Humidity");
  // Reading temperature or humidity takes about 250 milliseconds!
  float h = dht.readHumidity();
  // Read temperature as Celsius
  float t = dht.readTemperature();

  // // Check if any reads failed and exit early (to try again).
  // if (isnan(h) || isnan(t)) {
  //   lcd.setCursor(0, 1);
  //   lcd.print("Error reading");
  //   return;
  // }

  // Clear the previous readings
  lcd.clear();
  
  // Print temperature to LCD
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(t);
  lcd.print(" C");

  // Print humidity to LCD
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(h);
  lcd.print(" %");


  Serial.println(t);
  Serial.println(h);
  // Control LEDs based on temperature range
  if (t < 20) {
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, LOW);
    digitalWrite(BLUE_LED_PIN, HIGH); // Blue LED for cold
  } else if (t >= 20 && t <= 30) {
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, HIGH); // Green LED for normal
    digitalWrite(BLUE_LED_PIN, LOW);
  } else {
    digitalWrite(RED_LED_PIN, HIGH); // Red LED for hot
    digitalWrite(GREEN_LED_PIN, LOW);
    digitalWrite(BLUE_LED_PIN, LOW);
  }
}