QR code is the most common type of 2D code we see, so many people think that QR code is only 2D code, and 2D code is only QR code. This is a misunderstanding.

Next, let's talk about the 2D barcode.

2D codes can be divided into two types according to the difference in composition principle and structural shape: one is row-type 2D barcodes; the other is matrix-type 2D barcodes. The main advantages of 2D barcodes can be summed up in the following aspects:

1. Large data capacity and high information density;

2. Beyond the alphanumeric limit (editable letters, characters, numbers, text, etc.);

3. With error verification and error correction capabilities, different error correction levels can be set according to needs;

4. The item can be described in detail, and it can be used independently without relying on the database and communication network.

QR code is the most common in payment, PDF417 can be seen on all kinds of air tickets, and Data Matrix is mainly used for production parts, and is mostly engraved on the surface of parts by laser engraving.

QR code scanners can be used with conventional 2D code scanners. 

For example, XT6603B is a very cost-effective 2D scanner. 

Common 1D codes and 2D codes can be quickly scanned, and PDF417 codes can also be easily scanned; 

The laser engraving code will use a high-precision scanning gun such as XT6203.