Create a mysql database and http request.

Need a complete walkthrough to solve a problem. Probably to create a php script. This script should take a request sent from a device. This device should contain a link to a webpage hardcoded to [login to view URL] It then automatically appends its own serial no, and should receive a configuration file from a? mysql database, which in turn contains said configuration. The DB should also contain info about customers and a device we are selling to them.? I also want a page on my site where I can input data about customers and configure devices online, instead of writing a configuration file manually. When working with a great number of devices, I should be able to create a conf file online with a form, it is saved in the database, and those devices that I decide should be configured that way, should download those settings.