Qr Code Printing; Printing Size; Error Correction Level; Printing Position - Epson TM-T81M Series Development Manual

3.5 QR CODE Printing

3.5.1 QR CODE Printing
When printing QR CODE, set the Symbology parameter to one of the following
value
PTR_BCS_QRCODE:
PTR_BCS_OTHER + 3
used for maintaining compatibility).
PTR_BCS_OTHER + 4

3.5.2 Printing Size

Because the width and length of QR CODE are the same, printing is done to the
inner part at a size closest to it by using the value specified by the Width
parameter. Therefore, the height of print is not affected by the Height parameter.
If the Height parameter is less than 0, an error occurs.
The print size is determined by the version of QR and the size of the module.
Because the version of QR is determined by the data length and type, you can
use the size of the module to adjust the print size.
barcode cannot fit into the print area (depending on the paper width, layout
settings, etc.) then OPOS_E_ILLEGAL is returned and at this moment
ResultCodeExtended becomes zero.
For QR, it differs from other two dimensional barcodes; if the encoded data result
is not known, then the print width cannot be obtained. If the print width cannot be
obtained, the page mode range for 90-degree rotated printing cannot be specified.
Therefore, within OPOS it calculates the number of code words of the encoded
data. Because of this reason, data amount can be correctly verified.

3.5.3 Error Correction Level

Error correction level is fixed at 7%.

3.5.4 Printing Position

Like the one dimensional barcode, the print position of the two dimensional
barcode is the specified position.
Print using QR CODE model 2.
: Print using QR CODE model 1 (old specification,
: Print using QR CODE model 2.
APPLICATION DEVELOPMENT GUIDE
POSPrinter(TM-T81M/TM-T81IIM/TM-T81IIM-42C)
17
Version 3.00 Feb. 2019
If the two dimensional