Sorry about the delay, HN doesn't seem to notify me about comment replies.

I wrote a simple PHP script that generates the labels. It just pulls a bunch of data from our parts database and positions the text/graphical elements on a PDF page using fpdf. The Datamatrix/barcode is generated using Zint.

Once the PDF file is generated, the script passes it to /usr/bin/lp for instant printing to a Dymo LabelWriter, or sent with an attachment disposition for downloading and printing locally.

Hope this helps, please let me know if I may be of further assistance