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Till

An IKEA hack to bring contactless payments to the DUKTIG "Toy Cash Register".

Bill of Materials

Roadmap

  • Read register input
  • Integrate kernel for EMV
  • Test contactless payments
  • Mount componentry
  • Carve contactless symbol
    Contactless Symbol
  • Through lemonade sales, teach progeny about:
    • modern payment processing
    • PCI-DSS and PA-DSS
    • crypto
    • electronics

Building

make

Flashing

Note: connect all 6 ICSP pins regardless of whether the programmer provides power.

make install

Troubleshooting

Avrdude can't connect to Atmel-ICE on Mac OS X

OS X steals the interface.

Install a dummy driver to prevent this:

  • Decompress tools/AtmelICE.kext.tar.bz2 into /System/Library/Extensions
  • chown -R root:wheel /System/Library/Extensions/AtmelICE.kext
  • Reload with kextcache -system-caches
  • Unplug and plug in the Atmel-ICE device
  • Rejoice!

Resources