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Never tried it, but I think to send a string to a serial port, I think you
just use echo, or to send the contents of a file, use cat.  To set the bit
rate, etc, of the port, use stty.

On Wed, Dec 13, 2017 at 5:11 PM, Michael Norkun <[log in to unmask]>
wrote:

> Hey all, I need some help / ideas.
>
> We have a really old pro-lite led sign that has been great at collecting
> dust on the wall. A math teacher wants to turn it into a stock ticker. I
> was like yeah yeah, let's rig it to a raspberry pi. Here lies the problem.
> There is a serial port built into the sign to allow communication through a
> PC running win95.   : )
> I had a serial to USB adapter that allowed me to connect to Linux. Here is
> where it gets tricky, I can connect and sometimes send text for it to
> scroll using dosbox.  However, it's super clunky win95 software and only
> works sometimes.
> We want to directly communicate from Linux to the pro-lite.  We want the
> pi to pull stocks in real time, which is easy, but sending that data to the
> sign isn't so easy.
> The plan is to use mop to get the ticker fees, push it to a .txt with the
> right codes that the pro-lite likes in front of text...<ID01><PA> stock
> ticker text....<E><EOT>, again which a simple bash script will do. But
> sending that file is the issue. The machines aren't talking very well.
>
> So, long way around, does anyone have any ideas how to make this thing
> work? Anyone have any experience with sending info through serial ports via
> Linux? Anyone know how I can simply bypass the pro-lite motherboard and
> just hack the led display ?
>
> In Linux the serial port is talking through /dev/ttyUSB0. I've used this
> site for help but it has been no help...http://www.instructables.com/id/
> Communicating-with-a-Pro-Lite-LED-Display-Cable-C/
>
> Thanks in advance, I'm all ears.
>
> --
> Mike Norkun
> Science Teacher / Science Coordinator
> Bellows Falls Union High School
>
> *"Nature does not hurry, yet everything is accomplished."*
>
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Brattleboro Union High School District # 6
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