Wokwi - Online ESP32, STM32, Arduino Simulator

#include <SPI.h>
#include <WiFi.h>  // Use the appropriate Wi-Fi library for your module, like WiFi101 or WiFi.h
#include <DHT.h>

// Wi-Fi credentials
const char* ssid = "Your_SSID";
const char* password = "Your_PASSWORD";

// Define pin connections
#define LED_PIN 5       // Define the LED pin
#define DHT_PIN 4       // Define the DHT sensor pin
#define DHT_TYPE DHT11  // Define the DHT sensor type

DHT dht(DHT_PIN, DHT_TYPE);

// Web Server Setup
WiFiServer server(80);

void setup() {
  Serial.begin(115200);
  pinMode(LED_PIN, OUTPUT);
  dht.begin();

  // Connect to Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to Wi-Fi...");
  }
  Serial.println("Connected to Wi-Fi");
  Serial.print("IP Address: ");
  Serial.println(WiFi.localIP());

  // Start the web server
  server.begin();
}

void loop() {
  WiFiClient client = server.available();   // Listen for incoming clients

  if (client) {
    String request = client.readStringUntil('\r'); // Read the HTTP request
    client.flush();

    // Process the request and respond accordingly
    if (request.indexOf("/led/on") != -1) {
      digitalWrite(LED_PIN, HIGH);  // Turn LED on
      client.println("HTTP/1.1 200 OK");
      client.println("Content-Type: text/html");
      client.println();
      client.println("<html><body><h1>LED is ON</h1><a href='/'>Back</a></body></html>");
    } 
    else if (request.indexOf("/led/off") != -1) {
      digitalWrite(LED_PIN, LOW);  // Turn LED off
      client.println("HTTP/1.1 200 OK");
      client.println("Content-Type: text/html");
      client.println();
      client.println("<html><body><h1>LED is OFF</h1><a href='/'>Back</a></body></html>");
    } 
    else {
      // Serve temperature and humidity data
      float temperature = dht.readTemperature();
      float humidity = dht.readHumidity();

      client.println("HTTP/1.1 200 OK");
      client.println("Content-Type: text/html");
      client.println();
      client.println("<html><body><h1>Home Automation Control</h1>");
      client.println("<p>Temperature: " + String(temperature) + " &#8451;</p>");
      client.println("<p>Humidity: " + String(humidity) + " %</p>");
      client.println("<a href='/led/on'>Turn LED On</a><br>");
      client.println("<a href='/led/off'>Turn LED Off</a>");
      client.println("</body></html>");
    }

    delay(1); // Give the web browser time to receive the data
    client.stop(); // Close the connection
  }
}