How to scan with barcode scanner?
First, check the power supply of bar code gun: external power supply or PC host power supply. If PC host is powered, check the interface mode of barcode gun again, such as USB port, keyboard port, serial port, etc. If it is a USB port, you can plug it directly into the host computer. If it is RS-232 port or serial port, the host machine should be shut down, then connect the connection line of barcode gun, and then open the PC. Then read the manual of bar code gun and set it by scanning the bar code in the user manual. After setting it, the data can be scanned and uploaded to the computer.