WEB-service of orders for a cafe. How to make payment?

Question

Android

Good day to all!
I am thinking about such a system in my head: on each table there is a tablet, on which a website with a cafe is displayed. The visitor chooses an order for himself and sends it to the server (to the bar counter). After placing an order, the chefs cook, bring the order, and pay with the help of acquiring. Here at the place of payment I have the thinnest place. Can you tell me where it is better to read on this topic: security, how to organize, etc. ?

Answer 1

Fasten a ready-made solution, for example Robokassa .

Answer 2

Or robocas, or W1, or an NFC receiver.
another option is a mobile, portable card receiver at the waiter
's .

Answer 3

You don't have to use that.
Cash plus a terminal at the food porter. Covers 99% of needs.