title: Connection with POS terminal
body: <p>I am using this library: <a href="https://github.com/mike42/escpos-php" rel="nofollow noreferrer">https://github.com/mike42/escpos-php</a><br>
  With the first example</p>
  
  <pre><code>&lt;?php
  
  require __DIR__ . '/vendor/mike42/escpos-php/autoload.php';
  
  use Mike42\Escpos\PrintConnectors\FilePrintConnector;
  use Mike42\Escpos\Printer;
  
  $connector = new FilePrintConnector("php://stdout");
  $printer = new Printer($connector);
  $printer -&gt; text("Hello World!\n");
  $printer -&gt; cut();
  $printer -&gt; close();
  </code></pre>
  
  <p>Nothing happens. When I dump the <code>$connector</code> I can see notice:</p>
  
  <pre><code>object(Mike42\Escpos\PrintConnectors\FilePrintConnector)#2 
    (1) { ["fp":protected]=&gt; resource(6) of type (stream) } 
  Notice: Print connector was not finalized. Did you forget to close the printer? 
    in C:\xampp\htdocs\test\vendor\mike42\escpos-php\src\Mike42\Escpos\PrintConnectors\FilePrintConnector.php on line 44
  </code></pre>
  
  <p>My terminal is connected via bluethooth. I am working on Windows 10.<br>
  How should I connect to it? What should be the passed parameter in <code>FilePrintConnector</code> constructor?</p>