Scanning modules can also be called scanning modules, scanning engines, barcode identifiers, barcode scanners, embedded scanning modules, QR code modules, etc. The interfaces commonly used by scanning modules include the following:

1. USB interface: (USB cable is both a charging cable and a data cable)

(1) USB HID KB: (default data interface). (2) USB CDC; (You need to scan the QR code to set this interface)/USB virtual serial port

2. Serial interface:

The serial port interface is also called serial communication or serial communication interface (usually referred to as COM interface). The RS232 interface is also called COM port. It is a standard serial port and can usually be directly connected to computer equipment. Serial port tools are required for normal output, such as serial port debugging assistant, hyper terminal and other tools. No driver installation is required. Support command triggering.

3. TTL interface:

The TTL interface is a type of serial port, and the output is a level signal. If it is directly connected to a computer for testing, the output will be garbled. .Usually use Dupont wire or terminal wire to directly connect the corresponding four pins of VCC, GND, TX and RX to communicate. Support command triggering.

Scanning modules are widely used, such as: various types of gates, self-service ordering machines, self-service ticket machines, consumption machines, self-service cash registers, etc.