How to connect barcode scanning gun and computer

Release Time:2020-07-21

Bar code scanning gun can be connected to the computer use, the application industry in supermarkets, clothing stores, restaurants, bookstores and other places. The scanning gun generally has three interfaces, namely USB interface, keyboard port and serial port, as shown in the following figure.

How to connect barcode scanning gun and computer:

1)USB interface: generally plug and play, one end is connected to the scanning gun, one end is connected to the USB port on the computer

2) Keyboard interface: Y-type cable: one end is connected to the computer keyboard port and the other end is connected to the keyboard; There is also a scanning gun at one end.

3) Serial port: one end is connected to the computer serial port and the other end is connected to the scanning gun). Note: The serial port generally requires an external power supply, while the keyboard port and USB port can provide 5V power supply.

The above is the connection between the supermarket barcode gun and the computer. Some friends may not have used the special cash register software such as purchase, sale and storage, so they may mistakenly think that as long as the barcode is scanned by the scanning gun, relevant text information such as the price of the commodity will appear in the computer. In fact, this understanding is wrong. The barcode scanning gun only scans a string of numbers, this number represents the relevant information of the barcode product (product name, price, etc.), but this specific information needs to be displayed in the computer through other software.

For example, when we usually go shopping in supermarkets, we often see that every time the cashier scans a barcode, the computer will automatically pop up the name, price and other relevant information of the commodity. In fact, this computer has already applied similar cash register software such as purchase, sale and storage. This software already contains text information such as the name and price of all commodities in the supermarket. When the cashier scans the commodities, the software will automatically match the scanned barcode number with the commodity information in its own database, and finally the name and price of the commodity will be displayed in text form.

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