Wokwi - Online ESP32, STM32, Arduino Simulator

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

const char* ssid = "Wokwi-GUEST";   // Wokwi provides this simulated Wi-Fi
const char* password = "";

const int ledPin = 26;

WebServer server(80);

void handleRoot() {
  String html = R"rawliteral(
    <html>
      <head><title>LED Control</title></head>
      <body>
        <h1>LED Control</h1>
        <p><a href="/on"><button>Turn ON</button></a></p>
        <p><a href="/off"><button>Turn OFF</button></a></p>
      </body>
    </html>
  )rawliteral";
  server.send(200, "text/html", html);
}

void handleOn() {
  digitalWrite(ledPin, HIGH);
  server.send(200, "text/html", "<p>LED is ON</p><a href='/'>Go Back</a>");
}

void handleOff() {
  digitalWrite(ledPin, LOW);
  server.send(200, "text/html", "<p>LED is OFF</p><a href='/'>Go Back</a>");
}

void setup() {
  pinMode(ledPin, OUTPUT);
  Serial.begin(115200);
  
  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nConnected. IP address: ");
  Serial.println(WiFi.localIP());

  server.on("/", handleRoot);
  server.on("/on", handleOn);
  server.on("/off", handleOff);
  server.begin();
  Serial.println("HTTP server started");
}

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