i have an arduino with atmega328 and a ethernet breakout board
i want to know about interfacing it with arduino
in the examples there is a command for mac
do i need it for windows
please help
MAC in this case stands for Media Access Control, not Macintosh.
Yes, you need it. Look on the front of the box the ethernet adapter came in. There should be a sticker on it with some hex numbers. Use those in the sample scripts.
Look for a line in the code that appears like this (the actual numbers will be different than these):
byte mac[] = {
0x31, 0x13, 0x31, 0x13, 0x31, 0x13 };
Replace those 6 hex numbers (leave the "0x" in front of each) with what is on the sticker on your box. Use that same number in every script from now on that deals with the ethernet board. After you get your numbers put into a sketch, you might want to copy the mac address line into notepad and save it for easy copy/paste operations in all later scripts.