Wokwi - Online ESP32, STM32, Arduino Simulator

/* ESP32 WiFi Scanning example */

#include <WiFi.h>

// Replace with your Wi-Fi credentials
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";

WiFiServer server(80);  // Create a web server on port 80
const int ledPin = 2;    // GPIO pin to control LED

void setup() {
  pinMode(ledPin, OUTPUT);  // Set LED pin as output
  Serial.begin(115200);     // Initialize serial communication
  WiFi.begin(ssid, password);  // Connect to Wi-Fi

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

  server.begin();  // Start the web server
  Serial.println("Connected to WiFi");
  Serial.println(WiFi.localIP());  // Print the ESP32's IP address
}

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

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

    // Control the LED based on the request
    if (request.indexOf("/LED=ON") != -1) {
      digitalWrite(ledPin, HIGH);  // Turn LED on
    }
    if (request.indexOf("/LED=OFF") != -1) {
      digitalWrite(ledPin, LOW);  // Turn LED off
    }

    // Send HTML response
    client.println("HTTP/1.1 200 OK");
    client.println("Content-Type: text/html");
    client.println("Connection: close");
    client.println();
    client.println("<!DOCTYPE HTML>");
    client.println("<html>");
    client.println("<h1>LED Control</h1>");
    client.println("<a href=\"/LED=ON\">Turn On</a><br>");
    client.println("<a href=\"/LED=OFF\">Turn Off</a>");
    client.println("</html>");
    client.stop();  // Close the connection
  }
}