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

// Initialize components
LiquidCrystal_I2C lcd(0x27, 20, 4); // LCD I2C address
RTC_DS1307 rtc;
DHT dht(10, DHT22);

// Pin definitions
const int fanPin = 12;
const int pumpPin = 14;
const int lampPin = 27;

// Thresholds
const float tempThreshold = 30.0;
const float humThreshold = 80.0;

void setup() {
  // Initialize LCD, RTC, DHT
  lcd.init();
  lcd.backlight();
  
  if (!rtc.begin()) {
    lcd.print("RTC failed");
    while (1);
  }

  dht.begin();

  // Initialize relays
  pinMode(fanPin, OUTPUT);
  pinMode(pumpPin, OUTPUT);
  pinMode(lampPin, OUTPUT);

  // Ensure all relays are off initially
  digitalWrite(fanPin, HIGH); // Assuming LOW triggers the relay
  digitalWrite(pumpPin, HIGH);
  digitalWrite(lampPin, HIGH);
}

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

  // Display values on the LCD
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temp);
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("Hum: ");
  lcd.print(hum);
  lcd.print("%");

  // Control Fan based on temperature
  if (temp > tempThreshold) {
    digitalWrite(fanPin, LOW);  // Turn fan ON
  } else {
    digitalWrite(fanPin, HIGH); // Turn fan OFF
  }

  // Control Pump based on humidity
  if (hum < humThreshold) {
    digitalWrite(pumpPin, LOW);  // Turn pump ON
  } else {
    digitalWrite(pumpPin, HIGH); // Turn pump OFF
  }

  // (Optional) Add control for the lamp here if needed.

  delay(2000); // Delay to avoid rapid switching
}