Wokwi - Online ESP32, STM32, Arduino Simulator

#include <WiFi.h>
const char* ssid = "...";
const char* password = "...";

#define LED1 22

WiFiServer server(80);

void setup() {
  Serial.begin(115200);
  delay(10);
  pinMode(LED1, OUTPUT);
  digitalWrite(LED1, LOW);

  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");
  server.begin();
  Serial.println("Server started");
  Serial.print("Use this URL to connect: ");
  Serial.print("http://");
  Serial.print(WiFi.localIP());
  Serial.println("/");
}

void loop() {
  WiFiClient client = server.available();
  if (!client) {
    return;
  }

  Serial.println("New client");
  while (!client.available()) {
    delay(1);
  }

  String request = client.readStringUntil('\r');
  Serial.println(request);
  client.flush();

  if (request.indexOf("/led1on") > 0) {
    digitalWrite(LED1, HIGH);
  }
  if (request.indexOf("/led1off") > 0) {
    digitalWrite(LED1, LOW);
  }

  client.println("HTTP/1.1 200 OK");
  client.println("Content-Type: text/html");
  client.println(""); // Important blank line
  client.println("<!DOCTYPE HTML>");
  client.println("<html>");
  client.print("LED pin is now: ");
  if (digitalRead(LED1)) {
    client.print("On");
  } else {
    client.print("Off");
  }
  client.println("<br><br>");
  client.println("<a href=\"/led1on\"><button>Turn On</button></a>");
  client.println("<a href=\"/led1off\"><button>Turn Off</button></a><br />");
  client.println("</html>");

  delay(1);
  Serial.println("Client disconnected");
  Serial.println("");
}