The first question could be, “What is a web server?“

A web server is an application designed to receive HTTP requests from a client, process them and send a response to the client, using the HTTP protocol. Usually, the responses are HTML pages, XML content, JSON objects, CSS stylesheets, etc.

In this course we will serve an HTML page with buttons to control outputs, text boxes to send data through RS-485, texts with input values, and dynamic content using a little of JavaScript.