Need a way to send a command control string to printer.

Question

I am trying to print a USPS intelligent barcode (IBC) on a postcard size bill. The post card is approxiamtely 70 characters in width and 2-up. The command string that needs to be sent to the printer to print the IBC is 27 characters in length. The remaining data (data that actually needs to be barcoded) is 33 characters making the strin a total of 60 characters. My problem and questions is "How do I define a print field that will hold all 60 characters and allow me control over the area/position where the barcode is printed?". The IBC print position must conform to USPS Template Standards. Could someone please help me with this?

Answer 1

Hi,
Java card does not support string and char types. if you want to send string/chars for example 'Hello World' to the card and store them then you need to convert them into hex format and then send the converted hex string to the card.
The command APDU will be then,
CLA  --- Your class byte, can be 80
INS  --- Your Ins byte, can be 01
P1   --- Parameter P1 can be 00
P2   --- Parameter P2 can be 00
LC   --- Length of Hello World hex string (0B)
Data --- Hellow World Hex String (48656c6c6f20576f726c64)
Le -- 00