How does a ticket printer generate and print a QR code using commands? With the widespread use of QR codes, many merchants now include them on receipts for promotions or payments. But how exactly does a ticket printer produce a QR code when given specific commands?
Let’s take an example: the QR code that displays "WWW.OCOMINC.COM". To print this, you need to send a series of hexadecimal commands to the printer.
First, open a serial communication tool like a "Serial Debugging Assistant" or similar software. Then input the following command sequence:
1D 28 6B 30 67 07 – This sets the QR code size (the value '07' means a medium size). The number can range from 1 to 16, with higher values resulting in larger QR codes.
1D 28 6B 30 69 48 – This sets the error correction level. The value '48' corresponds to the lowest error correction level (Level L), while values 49, 50, and 51 represent higher levels (M, Q, H).
1D 28 6B 30 80 0F 00 – This tells the printer to prepare the encoding buffer for data input. The next part is the actual data to be encoded.
77 77 77 2E 6F 63 6F 6D 69 6E 63 2E 63 6F 6D – This is the hexadecimal representation of "WWW.OCOMINC.COM".
1D 28 6B 30 81 – This command triggers the printer to output the QR code from the encoding buffer.
0A 0A 0A – These are line feed commands. Adding multiple line feeds ensures the QR code isn't cut off during printing. You may also add a cutter command if needed.
1D 56 01 – This is the cutter command. If you don’t want the printer to cut the paper after printing, you can skip this step.
Putting it all together, the full command string would look like this:
1D 28 6B 30 67 07 1D 28 6B 30 69 48 1D 28 6B 30 80 0F 00 77 77 77 2E 6F 63 6F 6D 69 6E 63 2E 63 6F 6D 1D 28 6B 30 81 0A 0A 0A 1D 56 01
This sequence will instruct the printer to generate and print a QR code containing the URL "WWW.OCOMINC.COM". Make sure your printer supports these commands, as not all models may be compatible. Also, always test with a small sample before mass printing.
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