https://github.com/marcusramberg/summer_of_vendo

Project to reverse engineer our Sanden Vendo vending machine so we can add new payment methods to it.
https://github.com/marcusramberg/summer_of_vendo

Last synced: 17 days ago
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Project to reverse engineer our Sanden Vendo vending machine so we can add new payment methods to it.

• Host: GitHub
• URL: https://github.com/marcusramberg/summer_of_vendo
• Owner: marcusramberg
• Created: 2013-06-18T15:20:42.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2013-06-19T08:17:15.000Z (over 11 years ago)
• Last Synced: 2024-12-21T11:51:32.018Z (26 days ago)
• Size: 676 KB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
## Project Vendo

## Machine info

Machine produced by http://www.sandenvendo.it/

## Model information

* Model SVE GSP

Some photos here:

http://www.flickr.com/photos/marcusramberg/sets/72157634192791245/

## Protocol information

The machine generates reporting through the DEX protcol, and talks to modules through MDB. There are specifications for these protocols in the Manuals/ directory. Here's some info from wikipedia about MDB

http://en.wikipedia.org/wiki/Multidrop_bus

   MDB in Vending Machines 

The MDB protocol is used in vending machines to interconnect different modules (such as bill acceptors, card readers and coin changers) with one bus. The physical connection is realized as an unmodulated serial bus with a fixed data rate of 9600 baud, and 9 bits in each data word transmitted.

MDB has evolved as a standard protocol after 1995, allowing alternative (e.g. Smartcard based) payment systems to be connected to existing vending machines.

Bus addressing is based on the device type, which allows for a very simple protocol stack as no initial enumeration needs to be performed, but has the disadvantage that only one device of each type can be attached.

ccTalk [edit]

Main article: ccTalk

The ccTalk multidrop bus protocol uses an 8 bit TTL-level asynchronous serial protocol, it uses address randomization to allow multiple similar devices on the bus (after randomisation the devices can be distinguished by their serial number). ccTalk was developed by CoinControls but is used by several other vendors too.

I also find this tutorial enlightening:  http://www.vendingmarketwatch.com/article/10272928/dex-and-mdb-a-primer-for-vendors