#include <WiFi.h>
#include <WebServer.h>
#include <DHT.h>

// Replace with your network credentials
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Instantiate server at port 80 (http port)
WebServer server(80);

// DHT sensor configuration
#define DHTPIN 14      // Pin to which the data pin is connected
#define DHTTYPE DHT22  // Change to DHT11 if using that model

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(115200);
  dht.begin();  // Initialize DHT sensor

  WiFi.begin(ssid, password); // Begin WiFi connection
  Serial.println("Connecting to WiFi...");

  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  // Setup web server handler
  server.on("/", []() {
    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();

    String page;  // Declare the page variable

    // Check if any reads failed
    if (isnan(temperature) || isnan(humidity)) {
      page = "<h1><center>Failed to read from DHT sensor!</center></h1>";
    } else {
      page = "<h1><center>Webpage Monitoring Using ESP32</center></h1>"
             "<h3><center>Temperature: " + String(temperature) + " °C</center></h3>"
             "<h3><center>Humidity: " + String(humidity) + " %</center></h3>";
    }
    server.send(200, "text/html", page);
  });

  server.begin();
  Serial.println("Web server started!");
}

void loop() {
  server.handleClient();
  delay(500);
}