Difference between revisions of "Vending Machine/Cashless Device"
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(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.") |
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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. | ||
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| + | 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: | ||
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| + | # 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
