I am very new to Arduino. I have the Uno and the Wiznet ethernet shield.
I am hoping to set the Arduino as a UDP client, to communicate with a UDP server written in C# on a PC. Basically, what I am going to do is scan an RFID card, send the RFID card to the UDP server and validate the RFID card exists. I have found lots of tutorials on making the Arduino a UDP server, but not simply a client.
Is there anything out there that will get me started? The closest page I have found is - http://arduino.cc/en/Reference/EthernetUDPWrite
However, I can't work out how this works - Udp.beginPacket(Udp.remoteIP(), Udp.remotePort());
How does it know the IP address the server is hosted on?