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More random thoughts - If you can run it from a Win95 machine (i.e. if you
have *something* that will run it well), well, we used to use breakout
boxes and feed both sides to another computer to have a complete log to
find undocumented info on how things *really* worked.

good luck.


On Mon, Dec 18, 2017 at 1:36 PM, Steve Ligett <[log in to unmask]>
wrote:

> Michael - It's been a loong time since I've done anything with serial
> ports. (Ah, the days of programming software uarts.) Can you set the speed
> the display takes? Maybe handshake is failing, and going slower could help?
>
> good luck,
> steve
>
> 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.instructable
>> s.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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