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Topic: Ethernet.h library Ethernet Network Module (Read 16 times) previous topic - next topic


I have been struggling with adding the ethernet shield 2  the device card address to the  address code shown below.

byte mac[] = { 0xA8,0x61,0x0A,0xAE,0x85,0xC4 }; //this is one of my attempts.

The address on the card is  A8:61:0A:AE:85:C4

I am attempting a simple project i.e. switching a LED on & off (D2 to Ground).
I would appreciate some help as it seems my computer is not finding the address. 
The shield LED indicators appear to be functioning correctly.




Could you take a few moments to Learn How To Use The Forum.

Other general help and troubleshooting advice can be found here.
It will help you get the best out of the forum in the future.

It may not be the answer you were looking for but its the one I am giving based on either experience, educated guess, google (who would have thunk it ! ) or the fact that you gave nothing to go with in the first place so I used my wonky crystal ball.


Are you using one of the Ethernet Library examples?  Which one?  "WebServer"?  Are you using the IP address that is used in that example? Are your router and DNS Server at  If not, you have to specify the DNS Server and Gateway Router addresses in Ethernet.begin().

Does your router's address on the LAN start with 192.168.1?  If not, you need to pick an address that is on your network.
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