The code is released under the GNU General Public License.
This is the Arduino code to be used with an old vending machine which had a faulty controller board.
The code is used with an Arduino Pro Mini.
The current status of the machine can be seen at its Twitter profile: https://twitter.com/43vending.
More information can be found at the blog post: http://blog.tkjelectronics.dk/2015/02/iot-arduino-vending-machine/.
For more information send me an email at kristianl@tkjelectronics.dk.