Epson TM-T70-i ePOS-Print API Users Manual For TM-i firmware 4.1 - Page 96

addSymbol method Adds two-dimensional symbol printing to the command buffer. In page mode, a two-dimensional symbol is laid out in the current print position with the reference point being its bottom left dot. Syntax addSymbol(data, type, level, width, height, size); Parameter  data : ( Required parameter, Object type : String) Specifies two-dimensional symbol data as a character string. 2D-Code type Standard PDF417 Truncated PDF417 QR Code Model 1 QR Code Model 2 Micro QR Code *2 Description Convert the character string to the string in UTF8, apply the escape sequence, and then encode the string. The data area can contain up to 928 code words in a maximum of 90 rows, each of which can contain up to 30 code words. Convert the character string to the string in ShiftJIS, apply the escape sequence, and then encode the string based on the data type as shown below. Number: 0 to 9 Alphanumeric character: 0 to 9, A to Z, space Kanji character: Shift-JIS value 8-bit, byte data: 0x00 to 0xff 96