From owner-freebsd-ports@freebsd.org  Sat Jul 28 21:15:50 2018
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Date: Sat, 28 Jul 2018 23:15:52 +0200
From: Kurt Jaeger <pi@freebsd.org>
To: "Dan Mahoney (Gushi)" <freebsd@gushi.org>
Cc: ports@freebsd.org
Subject: Re: Virtual Printer Port?
Message-ID: <20180728211552.GT77764@home.opsec.eu>
References: <alpine.BSF.2.20.1807281305450.45143@prime.gushi.org>
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Hi!

> This may be off topic, but does anyone know a port or configuration for 
> FreeBSD that can listen on a serial port and spit out a PDF?  I have a 
> piece of hardware (a hospital-grade pulse oximeter) that's able to talk to 
> an *original* HP Thinkjet with a serial port and produce graphical charts. 

If you can catch one of those printout files, check the
contents of it.

Maybe GhostPCL or GhostPDL can work with that.

https://www.ghostscript.com/GhostPCL.html

-- 
pi@opsec.eu            +49 171 3101372                    2 years to go !