It sounds simple but theres a lot involved. Lets assume you PC is connected 24/7 A simple method is to set up a web server (Use EasyPHP). This will allow you to view your site (home based web site that is). Because you are using php script (EasyPHP) which is akin to C you can click on a button on you home page and write a function to send data to the com port. Well its a start. Mike