Issues with the prefix and suffix settings of the QR scanner

The Barcode Scanner's prefix and suffix settings allow you to add fixed characters (such as barcode type identification, date, or carriage return) before and after the scanned data without modifying the original barcode. Basically, the setting methods of all brands of barcode scanners are basically the same. The following are the approximate setting steps and precautions:

General setting method

Most barcode scanners enter programming mode by scanning a specific "configuration barcode", enter the hexadecimal value (Hex) of the character and save it. The basic steps are as follows:

1. Enter programming mode: Scan the "Enter Settings" barcode in the manual (such as "Enter/Exit Programming").

2. Select the prefix and suffix type:

- Prefix: Scan the "Configurable Prefix" or "Custom Prefix" barcode.

- Suffix: Scan the "Custom Suffix" or "Add Carriage Return/Tab" barcode.

3. Enter the character value: Scan the hexadecimal value of the required character in sequence (refer to the ASCII table in the barcode scanner manual):

- Example: To add the prefix "*" (Hex value "42"), you need to scan the code byte barcodes of "4" and "2" in sequence.

4. Save settings: Scan the "Save" or "Exit Programming" barcode to take effect.

Note:

The total length of prefixes/suffixes is usually limited to less than 10 characters.

Enabling all types of prefixes and suffixes may reduce the decoding speed.

Prioritize the ASCII table and configuration barcodes in the device manual and scan according to the process.

If you need to keep the fixed prefix and suffix requirements, you can achieve it through settings.

If you need to frequently modify the prefix and suffix, you can develop a program to intercept and modify the scan data stream (capture through the serial port/USB)

After setting, scan the test barcode and use a text editor (such as Notepad) to check whether the output format meets the expectations.

If you use a DEWO barcode scanner and don't know how to set it up, you can contact us directly and tell us the detailed requirements. We will send a configuration code, and the barcode scanner will complete the configuration after reading the configuration code.