http project - Wokwi ESP32, STM32, Arduino Simulator

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

#define DHTPIN 3        // GPIO where DHT11 is connected
#define DHTTYPE DHT22    // DHT11 or DHT22

const char* ssid = "";
const char* password = "";

DHT dht(DHTPIN, DHTTYPE);
WiFiServer server(80);

void setup() {
  Serial.begin(115200);
  dht.begin();

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi...");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println(" connected!");
  Serial.println(WiFi.localIP());

  server.begin();
}

void loop() {
  WiFiClient client = server.available(); 

  if (client) {
    Serial.println("New Client.");
    String request = client.readStringUntil('\r');
    client.flush();

    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();

    // Simple HTML Page
    String html = "<!DOCTYPE html><html><head><meta http-equiv='refresh' content='5'><title>DHT11 Web Dashboard</title></head><body>";
    html += "<h2>DHT11 Sensor Reading (ESP32)</h2>";
    html += "<p><strong>Temperature:</strong> " + String(temperature) + " &#8451;</p>";
    html += "<p><strong>Humidity:</strong> " + String(humidity) + " %</p>";
    html += "<p>Page auto-refreshes every 5 seconds</p>";
    html += "</body></html>";

    client.print("HTTP/1.1 200 OK\r\nContent-Type: text/html\r\n\r\n");
    client.print(html);

    delay(100);
    client.stop();
    Serial.println("Client disconnected.");
  }
}