@dimok789 - Dumping the Wii U EEPROM through the SPI connection to a file on your SD card
Dimok the well-known scene developer for the Wii U console is very busy, loadiine updates, HBL updates and the first otp2sd dumper and now very neat little bit of code is now available that allows to you to dump the unique SEEPROM from your console.
We can now finally dump the SEEPROM from your Wii U console, this chip contains more keys that you can decrypt using the info from the OTP, in this data block, you will find cool things like USB locking of your gamepad to your Wii U, region-locks, drive keys, and other locking down stuff, now that we can dump it, soon there will be tools to decrypt it, and then next step is writing back an changed version.
Sadly, currently this tool only dumps, and there does not seem to be any 'write circuit' on the Wii U, so to change the contents you will need an ATMEL programmer and to do some soldering to inject your new version, so clearly this tool is just for pure hard-core Wii U developers, that are willing to risk their own device or chance of 'bricking it' totally.
Current complied version of SEEPROM2SD by @dimok789 is below, but please see his Official GITHub site for the latest code:
OFFICIAL SITE: --> https://github.com/dimok789/seeprom2sd