#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Servo.h>
#include <DHT.h>
Servo myservo;
// Define LCD object for LCD1
LiquidCrystal_I2C lcd1(0x27, 16, 2);  // I2C address 0x27, 16 columns, 2 rows

// Define DHT22 sensor
#define DHT_PIN 2
#define DHT_TYPE DHT22
DHT dht(DHT_PIN, DHT_TYPE);

// Define servo and LED pins
#define SERVO_PIN 4
#define RED_LED_PIN 8
#define YELLOW_LED_PIN 5
#define RELAY_PIN 3

// Define variables for user input
int greenButtonState = 0;
int redButtonState = 0;

void setup() {
  // Initialize LCD1
  lcd1.begin(16, 2);

  // Initialize DHT sensor
  dht.begin();

  // Attach servo to its pin
  myservo.attach(SERVO_PIN);

  // Set LED pins as outputs
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(YELLOW_LED_PIN, OUTPUT);

  // Set relay pin as an output
  pinMode(RELAY_PIN, OUTPUT);
  }

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

  // Display temperature and humidity on LCD1
  lcd1.clear();
  lcd1.print("Temp: " + String(temperature) + "C");
  lcd1.setCursor(0, 1);
  lcd1.print("Humidity: " + String(humidity) + "%");

  // Check temperature conditions for the fan (servo)
  if (temperature > 40) {
    myservo.write(90);  // Turn on the fan
  } else {
    myservo.write(0);   // Turn off the fan
  }

  // Check humidity conditions for the relay
  if (humidity > 50 || humidity < 20) {
    digitalWrite(RELAY_PIN, HIGH);  // Turn on the relay
    digitalWrite(RED_LED_PIN, HIGH); // Turn on the red LED
  } else {
    digitalWrite(RELAY_PIN, LOW);   // Turn off the relay
    digitalWrite(RED_LED_PIN, LOW);  // Turn off the red LED
  }

  // Check light conditions for the yellow LED
  int ldrValue = analogRead(A0);
  if (ldrValue > 300) {
    digitalWrite(YELLOW_LED_PIN, HIGH);  // Turn on the yellow LED
  } else {
    digitalWrite(YELLOW_LED_PIN, LOW);   // Turn off the yellow LED
  }

  // Other actions...

  delay(1000);  // Delay for stability
}