How can I control a toy car wheel wirelessly from a web.
Would be easier with raspberry since you can run a web server on it. But with arduino, you must have a seperate web server running where you can then retrieve information with HttpClient.
Use AJAX so when you press a button it updates a file on the server. The Arduino will use the Ethernet shield to perform a GET request to the page on the server. If the text is equal to something, then do something with the motors and whatnot.