Print the QR code command:
Hex: 1F 1C mn nL 00 d1 d2 d3 ...... dk
1F 1C is a fixed instruction to print QR code
m: indicates the size of the barcode. The value of m ranges from 0 to 9.
n: indicates the error correction level, and the value of n ranges from 0 to 4.
nL The number of barcode characters printed.
The value of d ranges from 0 to 255.
Example: The QR barcode with the print data "OCOM".
Command: 1F 1C 08 03 04 00 4F 43 4F 4D OA
Explanation:
Dust Mask,Anti Dust Mask,Protective Mask,Surgical Disposable Face Mask
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