#include <Wire.h>
#include <LiquidCrystal_I2C.h>  // Include I2C LCD library
#include <DHT.h>

#define DHTPIN 14  // Pin connected to the DHT sensor
#define DHTTYPE DHT22 // DHT 22 sensor type
#define LEDPIN 5    // Pin connected to the LED

#define LCD_ADDRESS 0x27  // Replace with your LCD's I2C address
#define LCD_ROWS 2        // Number of LCD rows
#define LCD_COLUMNS 16    // Number of LCD columns

LiquidCrystal_I2C lcd(LCD_ADDRESS, LCD_ROWS, LCD_COLUMNS); // Initialize LCD object

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  pinMode(LEDPIN, OUTPUT); // Set LED pin as output
  Serial.begin(9600);     // Optional: Initialize serial communication for debugging
  dht.begin();            // Initialize DHT sensor
  lcd.init();             // Initialize LCD display
}

void loop() {
  // Read temperature from the sensor
  float temp = dht.readTemperature();
  int humidity = dht.readHumidity();

  // Check if reading was successful
  if (isnan(temp) || isnan(humidity)){
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  // Control LED based on temperature
  if (temp > 40) {
    digitalWrite(LEDPIN, HIGH); // Turn on LED
  } else {
    digitalWrite(LEDPIN, LOW); // Turn off LED
  }

  // Display temperature on LCD
  lcd.clear();
  lcd.print("T:");
  lcd.println(temp);  // Use println to move to the next line
  
  lcd.print("H: ");
  lcd.print(humidity);
  lcd.print("%");

  delay(1000); // Delay for 1 second
}