Serial coinslot uses Arduino as the controller for coin acceptor credits, (lcd display, and keypad E-loading)*optional. The data is transmitted via USB serial. Just connect the usb chord(shipped with your arduino) to your main vendo (Raspberry Pi, Orange Pi, Newifi D2 with USB Hub, or x64 Ubuntu Server)
Optional parts for E-loading (Keypad+lcd) setup:
NOTE: LCD and keypad are just optional.
Go to Sales → Payment Portals page.
Add Built-in / Wired Coinslot and follow the following settings: