If you need to use more than one Bartendro Dispenser for your application, then an arduino isn’t going to be sufficient to control all of them. A miniRouter board is designed to be used as a shield or ‘plate’ for a Raspberry Pi because the higher level control will be needed to control the all the dispensers individually / simultaneously. The RPI also enables capabilities like the ability to use a phone to control the dispensers. We recommend also getting a programmed SD card, WiFi dongle and 24V power supply for the easiest integration.