The Currenza C2 is a vending machine coin reader that uses a multidrop bus (MDB) interface. I wish to create a vending machine using the Currenza C2 B6M for coin reading, and connect it to an Android tablet as the interface.

I can't find the hardware required to connect a vending machine to an Android device. Does such a thing exist?

  • Would a Raspberry Pi with a touch-screen be acceptable instead of an Android tablet? You may have better luck connecting an interface like MDB to a device like that because there is a larger availability of interfaces and third-party hardware around the Raspberry Pi. Such as this module.
    – Romen
    Sep 19, 2019 at 16:03
  • Do you already have the tabled you want to use? Because it seems that there are specialised devices like this one (and of course, the raspberry pi, as mentioned)
    – timuzhti
    Sep 21, 2019 at 8:19

1 Answer 1


What you are looking for is either a direct Multi-Drop to USB converter or a Multi-Drop to RS232 converter which can then be converted to USB. As far as I know Android exposes the serial port API. There are many such devices, one example would be this.

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