title: Communicate with the serial port from client web browser.
body: <p>In my web application(sencha extjs 5) I have a user requirement to read/write data to the client PC serial port. </p>
  
  <p>I am aware of the client browser can not access local machine hardware without installing some binaries on the local machine(Native app, Windows Service, etc..). </p>
  
  <p>I have seen the same question is discussed few years back in stackoverflow forums. But I need to know what is the best way of doing this today with the available technologies? </p>