This example shows how to output time got from NTP time server to the serial monitor using the protocol of NTP (Network Time Protocol) application layer. NTP is a typical example using a UDP (User Datagram Protocol) transport protocol.
This is a simple example of creating a web server using Arduino board and ethernet shield in order to see a temperature and atmospheric pressure measured by the atmospheric pressure sensor via Web page.
This article will help you implement a simple project that will require limited hardware and you can develop an app that can monitor your room or home temperature using Windows Phone.
If you do just step by step, you will use your Ethernet Shield and your Arduino board to create a chat program using UDP!