Talk about the general principle and flow of the work of the vending machine

The general principle and process of the work of the vending machine is: 　　 1. The traditional non-intelligent vending machine 　 　 put paper money or coins, and the currency recognizer will recognize it.　　Choose goods, press the goods button, the vending machine program will add or subtract cash according to the price of the goods.　　Ship, if the amount invested is not enough, there will be a prompt, if the amount is enough, it will be shipped directly.　　Wait for the customer's further operation. If you choose to change without buying other things, the vending machine will automatically change coins according to the result of the calculation just now, and the shopping is complete.　　Second, smart vending machine 　　After selecting the goods, the vending machine program will initiate a payment application QR code (WeChat, Alipay or other electronic payment) to the background server, and the QR code will be directly displayed on the display of the vending machine.　　 After the customer scans the code, the back-end server will inquire whether the receiving account has received the payment. If it is received, the back-end server will issue a shipment instruction to the vending machine, and the vending machine will ship the goods according to the instruction. Smart vending machines have many functions and complex principles. Some do not require payment and can be shipped according to the entered delivery code. The principle is that the customer enters the delivery code or lottery code, and the vending machine sends the delivery code to the back-end server, and the back-end server picks up the goods. The code is verified, and the corresponding shipping instruction is sent to the vending machine, and the vending machine outputs the corresponding product according to the instruction.　　 The working principle of vending machines is probably like this. Nowadays, more and more smart vending machines are on the market. After all, it is much more convenient to use mobile phones to scan QR codes.　　 This article is organized by a vending machine, and the opinions in this article do not represent the views of this site. Previous post: How does a vending machine identify the face value and true or false of the money invested