I sometimes use a Tera Digital HW0006Pro 2D Barcode Scanner. The scanner has a small display and can be run in various modes. It can be configured with specific Barcodes which are stated in the user manual. This page is my shortcut!

HID Emulation German

HID Emulation International

Terminators

Keyboard Conversion

Instructions contain all to lower, to upper and switch.

Scan Mode

Instructions contain Continous Scan Mode and Sensor-activated Mode