Baisally, if you do not understand the QR code specs, it is difficult to understand the command.
So let us give you the example.
You need to send unicode data as binary.

<Barcode field definition>
Rotate: 1 (Normal)
Symbol: v (QR CODE)
Thick (Symbol version): 3 (Version 3)
Narrow (Symbol version): 3 (Version 3)
Height (Symbol model): 002 (Model 2)
Row: 0010 (1mm)
Colunn: 0010 (1mm)
ECC Level : Q (Level Q)
Input mode: M (Manual setting)
Input data1: A 123ABC (Alfanumeric)
Input data2: B 0004 [0x4E0D 0x4E0E] (UTF-8 binary code : 4byte)

<Example>
// Changing units from inch to metric system
STX m
// Starts label format mode
STX L
// Barcode field definition (followed by “CR” code to end)
1v4400200100010QM,A123ABC,B0004[0x4E0D 0x4E0E] [0x0D]
// Ends label format mode and prints
E

Please refer to following URL(DENSO WAVE) for specification of the QR CODE.
http://www.denso-wave.com/qrcode/index-e.html