* Objective: Operating via Android touchdisplay at the case, as well as Near Field Communication (NFC/Text/App.)
* Initial Prototyp: Microcontroller via ten-key-pad and alphanumerical display
** 2nd step: Android OS Tablet or smart phone smartphone as component of the vending machine
** internal communication via Bluetooth
** 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 ===