title: Qt programming: serial port communication module/plugin
body: <p>Firstly please let me explain what I am trying to do:</p>
  
  <ol>
  <li><p>I am using Qt to build an app mainly based on webkit. This app fetches content from internet and present it to user by traditional web way.</p></li>
  <li><p>My app has to communicate many serial port devices, such as printer, IC card reader.</p></li>
  <li><p>These serial port devices have different models, so that they have different communication protocol.</p></li>
  <li><p>I want separate my app with the serial port devices communcating part, so that I can only update the communcation part without updating all the app.</p></li>
  </ol>
  
  <p>Do I need to write a Qt plugin/webkit plugin, or some other way to do this? Any suggestions are welcome!</p>
  
  <p>Thanks </p>