Complete, working example of setting up a server on a basic "home user" internet account.
Read analog, digital sensors attaced to an Aruduino or clone, change the state of outputs... all from an "ordinary" web page you can access with any browser, from any internet terminal, anywhere. Doesn't require static IP address, if you've heard of them and are worried.
All details explained. (Start with using it on your LAN... once you have that working, "connecting" to the WAN is a separate task.)
Short clip showing the device in action: https://www.youtube.com/watch?v=-7vSGgfXp6I
Go to....
to "play" with the one on my desk.
Go to...
... for the "How to..."
Home automation, anyone? Alarm system?