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


#define DHTPIN 8 // Pin connected to the DHT sensor
#define DHTTYPE DHT22 // DHT 22 (AM2302)

LiquidCrystal_I2C lcd(0x27, 16, 2); // Initialize the LCD at I2C address 0x27 for a 16 chars and 2 line display

DHT dht(DHTPIN, DHTTYPE); // Initialize DHT sensor

float hum;  // Stores humidity value
float temp; // Stores temperature value

void setup() {
  Serial.begin(9600);
  dht.begin(); // initialize the sensor
  lcd.init(); // Initialize the lcd 
  lcd.backlight(); // Turn on the backlight
}

bool printedHeader = false; // Flag to check if header has been printed

void loop() {
  hum = dht.readHumidity(); // Read humidity
  temp = dht.readTemperature(); // Read temperature

  // Check for failed sensor read and handle it
  if (isnan(hum) || isnan(temp)) {
    Serial.println("Failed to read from DHT sensor!");
  } 
  else {
    // Print to Serial Monitor
    if (!printedHeader) {
      Serial.println("Humidity,Temperature");
      printedHeader = true;
    }
    Serial.print(hum);
    Serial.print(",");
    Serial.println(temp);

    // Display on LCD
    lcd.clear();
    lcd.setCursor(0,0); 
    lcd.print("Humid="); 
    lcd.print(hum); 
    lcd.print("%");
    lcd.setCursor(0,1); 
    lcd.print("Temp="); 
    lcd.print(temp); 
    lcd.print(" C");
  }
   
   delay(2000); // Delay between reads
}