Waveshare Barcode Scanner Module User Manual page 31

1d / 2d codes reader
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Barcode Scanner Module User Manual
Change the Length M of Start
With data setting code and this one, you can change the length of Start segment.
The length of Start is max 255 characters.
The Length M is represented by a HEX. More details about HEX refer to Appendix
D
Change the Length N of End
With data setting code and this one, you can change the length of End segment.
The length of Start is max 255 characters.
The Length N is represented by a HEX. More details about HEX refer to Appendix
D
Examples:
Decoding Data: "1234567890123ABC", output the first thirteen bytes:
"1234567890123"(Only Start)
1) Query the characters table to get the HEX value of "13"(DEC) is "0D"
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Modify the Length M
Modify the Length N
Rev1.0 Date:180621

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