Hi all,
I'm having a frustrating time locating official, complete specifications on the above two protocols. I don't mind [my client] paying for them, but I want authoritative documents. Anyone know where these can be obtained?
In fact, I can't work out if DEX is actually a nailed-down standard or just an acronym used to describe auditing functionality that can be carried out in numerous different and utterly nonstandard ways. All the documents I've read on it are very vague and fuzzy; they talk about the possibility of using a serial port or GSM module or Bluetooth or Ethernet.
(MDB is the Multi-Drop Bus interface used for bill validators, smartcard readers and coin changers, and DEX is Data EXchange, a protocol/interface used for auditing vending machines).