Ethernet module does not work or something wrong in my code?

Hi guys,

I am trying to use the fez spider ethernet module.

I used both the methods UseStaticIp and UseDHCP with no success.

UseStaticIP("", "", "");

does not raise any exception, but the spider does not respond to a ping.


raises this exception:

Using mainboard GHIElectronics-FEZSpider version 1.0
#### Exception System.Exception - CLR_E_FAIL (3) ####
#### Message:
#### Microsoft.SPOT.Net.NetworkInformation.NetworkInterface::UpdateConfiguration [IP: 0000] ####
#### Microsoft.SPOT.Net.NetworkInformation.NetworkInterface::EnableDhcp [IP: 000f] ####
#### Gadgeteer.Modules.Module+NetworkModule::DHCPThread [IP: 0026] ####
Eccezione first-chance di tipo ‘System.Exception’ in Microsoft.SPOT.Net.dll
Eccezione non gestita di tipo ‘System.Exception’ in Microsoft.SPOT.Net.dll

I saw that the MAC address displayed during the fez spider boot sequence was different than that on the wiznet label. So I tried this:

 byte[] mac = { 0x00, 0x21, 0x03, 0x80, 0x2D, 0xC9 };
ethernet.NetworkSettings.PhysicalAddress = mac;

During the next startup of the spider, the MAC displayed during the startup was right.

I also noticed that when I plug the ethernet cable on the module and on the router, the ethernet module act led is switched off; the router led is also switched off.

Missing something?

If the LED is not lighting up then there might be something wrong from the hardware side. Try a different Gadgeteer cable and make use it is attached to Socket E.


I used two different gadgeteer cables. Nothing.
The module is connected to socket E (nr. 7).

Anything else I can try?

Thank you!



don’t ask me why (probably because the weather is rainy and I am on holiday today :D), but I found an old router and I decided to try with this.

And the ethernet module works fine…

The router that does not work with the spider has 2 days, it’s quite a new model.

Now I’m going to find the reason why it does not work…

May be it is affraid of spiders?

Spiders are scary to some, you know :slight_smile:

I believe that the Spiders ship with a default MAC address?

The unique address is on the EMX module, and should be set with MFDeploy.

It could be that some routers do not like the default MAC address?

Try a crossover cable

Thank you all!
Seems to be a router problem.
Restarting the router, all is working fine.

Uhm, I hate this type of problems that finally do not have a REAL solution!

Thank you for your help!