Cashless VMC - Dispense a Product in Always Idle Mode

This tutorial will explain how to make a Cashless Vend in Always Idle Mode using Qibixx Devices.

To perform a Cashless Vend in Always Idle, follow these steps:

• Enable Cashless VMC (Always Idle Master) on the MDB Device by issuing the following command:

D,2

• Wait for the Cashless Reader to reply to the MDB Device. When it replies, the following message will be shown:

d,STATUS,INIT,1

• Enable the Cashless Reader by issuing the following command (enabling means telling the reader that the VMC is ready to accept payments):

D,READER,1

• Once the reader is enabled, the following message will be received on the console:

d,STATUS,IDLE

• Here, on a full vending machine, a product would be selected, making the Controller send a Vend request with the price and product ID to the MDB. To send a vend request to the MDB Bus, use the following command:

D,REQ,<price>,<prod_id>

Example:

D,REQ,1.20,10

• In this step, the user should swipe/present the Credit Card to the reader, and once accepted, the following message will be received in the serial console:

d,STATUS,RESULT,<result>,<price>

Examples:

d,STATUS,RESULT,1,1.20

If the reader does not accept the Vend Request, or the user cancels the transaction, the following message will be received, instead of the above:

d,STATUS,RESULT,-1

• After the product has been dispensed, confirm the transaction to the reader by sending the following command:

D,END

If for some reason, it was not possible to dispense the product, it is possible to revert the transaction by sending the following command:

D,END,-1

Once the reader is ready to accept new transactions, the Idle message will be received again:

d,STATUS,IDLE