[Question] Genrating an GS1-128 barcode
nilpath opened this issue · comments
Hi!
We're using you library to generate barcodes and so far it been working geat.
However we've hit a road bump in generating a GS1-128 barcode (most likely we've missunderstood how the library works) when it comes to the hidden FNC1 character. Looking though the source it looks like you support this but it's a bit unclear to us how should generate this type of label.
Are we supposed to send in the FNC1 character manually?
yes indeed. you need to add the FNC1 by hand since it can encode all kind of Code-128 barcodes and not just GS1 compatible.
There is a constant code128.FNC1 which you will need to put in front of your string.
If you need any help please let me know.
tank you, the FNC1 seem to work great however, we're trying to get this barcodes validated/certified by an external source and it seem like they expected FNC1 to be inserted before AI 96 whatever that means.
do you have an idea what that could mean? appreciate the help 👍
hm noticed now that it probably implementation specific. something unrelated to the actuall barcode generation.
thanks for the help otherwise 👍
I've just read some docs about GS-1 and it seems like it needs a FNC1 to terminate each AI that has variable length. But I'm not totally sure about it.
for example: (30)19(21)123456789012 needs to be <FNC1>3019<FNC1>21123456789012
You could have a look at this table: https://www.activebarcode.de/codes/ean128_ucc128_ai.html
Though some information are german...
@boombuler yes thats our conclusion as well :)