// --- Library Includes ---
#include <LiquidCrystal.h>
#include <DHT.h>
#include <WiFi.h>



// --- DHT11 Sensor Setup ---
#define DHTPIN 4          // The pin the DHT11 data is connected to.
#define DHTTYPE DHT11     // The type of sensor (DHT11 or DHT22). 
DHT dht(DHTPIN, DHTTYPE); // Initialize DHT sensor.

// --- LCD1602 Direct Wiring Setup ---
// Initialize the library with the pins used for the LCD's interface.
// LiquidCrystal(rs, enable, d4, d5, d6, d7);
const int rs = 19, en = 23, d4 = 18, d5 = 5, d6 = 17, d7 = 16;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

// --- Setup Function ---
void setup() {
  Serial.begin(115200);

  // Initialize the DHT sensor.
  dht.begin();

  // Initialize the LCD display.
  // Set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  lcd.clear();

  lcd.setCursor(0, 0);
  lcd.print("Connecting to...");
  lcd.setCursor(0, 1);
 

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.setCursor(0, 1);
 
  delay(3000);
}

// --- Main Loop ---
void loop() {
  // Read temperature and humidity every 5 seconds.
  delay(5000);

  // Read humidity from the sensor.
  float h = dht.readHumidity();
  // Read temperature as Celsius.
  float t = dht.readTemperature();

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Sensor Read Error!");
    return;
  }

  // Clear the display for the new data.
  lcd.clear();

  // Display temperature on the first line.
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(t);
  lcd.print(" C");

  // Display humidity on the second line.
  lcd.setCursor(0, 1);
  lcd.print("Hum:  ");
  lcd.print(h);
  lcd.print(" %");

  // Print to Serial Monitor for debugging.
  Serial.print("Humidity: ");
  Serial.print(h);
  Serial.print(" %\t");
  Serial.print("Temperature: ");
  Serial.print(t);
  Serial.println(" *C");
}