The main function of PDA is barcode scanning, about the use of barcode scanning tool of PDA, take small code brother Ge as an example, find the icon of scanning tool after booting, open the scanning application to enter the interface, press scanning to scan barcode normally. Select "Barcode Settings", you can enter the barcode type setting interface, set the required barcode type. In the application setting interface of the scanning tool, you can set the scanning sound, scanning vibration, scanning duration, cycle scanning, interval time and so on.