Have assembled succesfully a KA04 ethernet shield for Arduino … but now , how do I get the MAC-adress for this unit ?
Just set the MAC to whatever you wish (as long as its unique on your network). The examples use one like this.
// ethernet interface mac address
static byte mymac[] = { 0x74,0x69,0x69,0x2D,0x30,0x31 };
OK , but then I do not fully understand … the MACadresswas supposed to be unique for every
physical object connected to the net , no ?
Yes, set it to something random and unique…
You could borrow an address from some unused equipment you have.
Since this is not a commercial product you can choose a completely random mac address. There are more than 280.000.000.000.000 possible addresses. So you have higher chances of winning the lottery than choosing a random address that’s also used by a device in your possession.
OK thanks…