mdb-arduino-cashless

Arduino "Cashless Device" project for MDB protocol

Target configuration:

1. Arduino Uno (ATmega 328P)
2. MFRC522 13.56MHz RFID Reader
3. Ethernet Shield W5100
4. Vending Machine Controller, MultiDropBus Protocol (https://www.ccv.eu/wp-content/uploads/2018/05/mdb_interface_specification.pdf)

Main features:

1. Target is a device of "Cashless Device" class.
2. Hardware USART of Arduino Uno configured for 9-bit word communication (9600 baud, 9 data bits, no parity, 1 stop-bit).
3. Payment is based on 13.56MHz RFID cards.
4. Balance of the card is stored on the HTTP Server.
5. Device makes HTTP request to Server to make a payment and then vend item in case of success.