Vending Machine/Cashless Device: Difference between revisions
Jump to navigation
Jump to search
Created page with "The MDB spec already takes into accoutn cashless devices, so we ''simply'' have to build a device that conforms to the spec." |
No edit summary |
||
| Line 1: | Line 1: | ||
The MDB spec already takes into accoutn cashless devices, so we ''simply'' have to build a device that conforms to the spec. | The MDB spec already takes into accoutn cashless devices, so we ''simply'' have to build a device that conforms to the spec. | ||
The specification defines 3 levels of cashless devices, with more more features the higher the level. The Vending Machine (VMC) also has a level, and a device and VMC can only communicate using the highest commonly supported level. As our VMC is only level 1, we only need to implement a level 1 cashless device. | |||
The cashless device is basically a state machine with 5 states (7 for level 2 and 3 machines). These states are: | |||
# Inactive | |||
# Disabled | |||
# Enabled | |||
# Session Idle | |||
# Vend | |||
[[File:State-machine.png]] | |||
Revision as of 02:57, 12 August 2011
The MDB spec already takes into accoutn cashless devices, so we simply have to build a device that conforms to the spec.
The specification defines 3 levels of cashless devices, with more more features the higher the level. The Vending Machine (VMC) also has a level, and a device and VMC can only communicate using the highest commonly supported level. As our VMC is only level 1, we only need to implement a level 1 cashless device.
The cashless device is basically a state machine with 5 states (7 for level 2 and 3 machines). These states are:
- Inactive
- Disabled
- Enabled
- Session Idle
- Vend
