Can a web application listen for data without a server?

For my job, I am researching a new means of accessing data from a web application created in either HTML or Javascript. The situation is that we have a proxy that takes data from a computer's serial port and broadcasts it. We want our web application to receive that data that is being broadcasted, however we want to implement this without creating a server to acquire said data.

So far I have been researching and googling for a solution but my search hasn't been fruitful. If there exists a means for a web application to acquire data being broadcasted from a proxy, I would like to know. Also we are running the web application locally from file:\\ in IE11.

This stack overflow question is somewhat similar to our situation, however we cannot use Flash or Adobe Air: https://stackoverflow.com/questions/7932551/as3-socket-class-connection-with-serproxy-and-sending-data