[] Bidirection Port Control[ajax] by classdisk

This sketch is missing a short description

hat is AJAX? AJAX stands for Asynchronous JavaScript and XML. AJAX is basically the use of a set of JavaScript functions for getting information from the web server (our Arduino). This means that data on a web page can be updated without fetching the whole page each time. Using AJAX will be an improvement on the previous part of this tutorial as HTML refresh code that makes the page flicker each time it is reloaded is no longer needed. Only the information that has changed (the state of the switch) will be updated on the page eliminating the flicker. What is JavaScript? JavaScript is a client side scripting language. This means that it is code that will run on the web browser. JavaScript is included in the HTML page. When you surf to the HTML web page hosted by the Arduino, the page and the JavaScript is loaded to your browser. Your browser then runs the JavaScript code (provided that you have not disabled JavaScript in your browser). Web Server Hardware The switch is interfaced to the Arduino / Ethernet shield as done in the circuit diagram from this article: Project 4: Switch a LED on when Switch is Closed (Button) except that the switch is connected to pin 3 and not pin 2 of the Arduino (the article actually uses the circuit diagram from one of the Arduino examples on the Arduino website). Arduino AJAX Sketch The sketch for this part of the tutorial is shown below. Copy it and paste it into your Arduino IDE and then load it to the Arduino.