Änderungen
Aus Hackerspace Ffm
** Near-Field-Communication
** Text/SMS
** Barcodes or coupon codes<br/>* [https://github.com/FellowTraveler/Open-Transactions Open Transactions]<br />[http://members.iinet.net.au/~mcmeikan/pktp/ PKTP]
=== Microcontrollers ===