generate the barcodes of each device gets the code

Stick them on your device.

2 x click to outdoor areas or restoration or after in-program user inactivity switches to reading mode

then the program according to the code from usb wedge scaners, displays the device

scanners reads the code size 20 and size 40 from mobiles

In case program draw text only then you must install barcode 39 FONT. Download, open control panel folder: "Fonts" and copy into.