Wokwi - Online ESP32, STM32, Arduino Simulator

//when motoin is detected light will be on in a room or else the light will be off.
#include <WiFi.h>

const char* ssid = "Wokwi-GUEST";
const char* password = "";

const int relayPin = 4; // Pin connected to the relay module
const int motionSensorPin = 2; // Pin connected to the motion sensor

WiFiServer server(80);

void setup() {
  Serial.begin(115200);
  pinMode(relayPin, OUTPUT);
  pinMode(motionSensorPin, INPUT);
  
  // Connect to Wi-Fi
  Serial.println();
  Serial.println("Connecting to WiFi");
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  
  server.begin();
}

void loop() {
  WiFiClient client = server.available(); // Check if a client has connected
  
  if (client) { // If a client has connected
    Serial.println("New client connected");
    String currentLine = ""; // Make a String to hold incoming data
    while (client.connected()) { // Loop while the client is connected
      if (client.available()) { // If data is available to read
        char c = client.read(); // Read a character
        Serial.write(c); // Print it out to the serial monitor
        if (c == '\n') { // If the character is a newline character
          // If the current line is blank, you got two newline characters in a row
          // that's the end of the client HTTP request, so send a response:
          if (currentLine.length() == 0) {
            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
            // and a content-type so the client knows what's coming, then a blank line:
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println();
            
            // Display the HTML web page
            client.println("<html><head><title>Home Automation</title></head><body>");
            client.println("<h1>Home Automation</h1>");
            client.println("<h2>Motion Detection</h2>");
            client.println("<p>Click the button to simulate motion detection:</p>");
            client.println("<form action=\"/motion\" method=\"get\"><button type=\"submit\">Trigger Motion</button></form>");
            client.println("</body></html>");
            
            // The HTTP response ends with another blank line:
            client.println();
            // Break out of the while loop
            break;
          } else { // If you got a newline, then clear currentLine
            currentLine = "";
          }
        } else if (c != '\r') { // If you got anything else but a carriage return character
          currentLine += c; // Add it to the end of the currentLine
        }
      }
    }
    // Clear the header variable
    currentLine = "";
    // Close the connection
    client.stop();
    Serial.println("Client disconnected");
  }
  
  // Check for motion
  bool motionDetected = digitalRead(motionSensorPin);
  
  if (motionDetected) {
    // Turn on the relay to activate home automation
    digitalWrite(relayPin, HIGH);
    Serial.println("Motion detected! Turning on lights.");
    delay(5000); // Simulate lights being on for 5 seconds
    digitalWrite(relayPin, LOW);
    Serial.println("Lights turned off.");
  }
  
  delay(1000); // Check for motion every second
}