#include <WiFi.h>
// For ESP32, use #include <WiFi.h>

const char *ssid = "ESP_AP"; // Set your AP SSID
const char *password = "12345678"; // Set your AP password

WiFiServer server(80); // TCP server on port 80

void setup() {
  Serial.begin(115200);
  WiFi.softAP(ssid, password); // Start the AP

  Serial.println();
  Serial.print("AP IP address: ");
  Serial.println(WiFi.softAPIP());

  server.begin(); // Start TCP server
}

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

  if (client) { // If a new client connects,
    Serial.println("New Client."); 
    String currentLine = "";
    
    while (client.connected()) { // loop while the client's connected
      if (client.available()) { // if there's bytes to read from the client,
        char c = client.read(); // read a byte
        Serial.write(c); // print it to the Serial Monitor
        currentLine += c;
        
        if (c == '\n') { // if the byte is a newline character
          if (currentLine.length() == 1) { // if the current line is empty,
            client.println("Hello from ESP AP!"); // send a reply to the client
            break;
          } else { // if you got a newline, then clear currentLine
            currentLine = "";
          }
        }
      }
    }
    client.stop(); // Close the connection
    Serial.println("Client Disconnected.");
  }
}