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

// WiFi settings
const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* mqtt_server = "io.adafruit.com";

// MQTT settings
const char* mqtt_user = "mhemanthkmr143";
const char* mqtt_password = "aio_wYxf47Lv4K7KDok4e3zleKf9NekW";
const char* temperature_topic = "home/temperature";
const char* humidity_topic = "home/humidity";

// LCD settings
LiquidCrystal_I2C lcd(0x27, 16, 2);  // Set the LCD address and dimensions

// DHT sensor settings
#define DHTPIN 2
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

// Relay pins
const int relayPins[] = {3, 4, 5, 6, 7};

// Initialize MQTT client
WiFiClient espClient;
PubSubClient client(espClient);

void setup() {
  // Initialize Serial Monitor
  Serial.begin(115200);

  // Initialize WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.println("Connecting to WiFi..");
  }
  Serial.println("Connected to WiFi");

  // Initialize MQTT
  client.setServer(mqtt_server, 1883);
  while (!client.connected()) {
    Serial.println("Connecting to MQTT...");
    if (client.connect("arduinoClient", mqtt_user, mqtt_password)) {
      Serial.println("Connected to MQTT");
    } else {
      Serial.print("Failed, rc=");
      Serial.print(client.state());
      Serial.println(" Retrying in 5 seconds");
      delay(5000);
    }
  }

  // Initialize LCD
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Temp:     C");
  lcd.setCursor(0, 1);
  lcd.print("Humidity: %");

  // Initialize DHT sensor
  dht.begin();

  // Initialize relay pins
  for (int i = 0; i < 5; i++) {
    pinMode(relayPins[i], OUTPUT);
    digitalWrite(relayPins[i], LOW);  // Initially turn off relays
  }
}

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

  // Update LCD
  lcd.setCursor(6, 0);
  lcd.print(temperature);
  lcd.setCursor(10, 1);
  lcd.print(humidity);

  // Update MQTT
  if (client.connected()) {
    client.publish(temperature_topic, String(temperature).c_str());
    client.publish(humidity_topic, String(humidity).c_str());
  }

  // Control relays based on temperature and humidity
  if (temperature > 25) {
    digitalWrite(relayPins[0], HIGH);  // Turn on relay 1
  } else {
    digitalWrite(relayPins[0], LOW);   // Turn off relay 1
  }

  if (humidity > 60) {
    digitalWrite(relayPins[1], HIGH);  // Turn on relay 2
  } else {
    digitalWrite(relayPins[1], LOW);   // Turn off relay 2
  }

  // Other relay control logic can be added here

  delay(5000);  // Update every 5 seconds
}