I lost the source code I had originally for this sign.  Chris Gray left a comment about help and I ultimately ended up re-visiting code for the 4U2See.

Download CinderSerial

sign fixed with a hack...

The problem is that when I try to send a "file" to the sign,

c:\sequent.sys (on the sign) does nothget updated.  So you create a legit file with sigma editor, rename it without an extension.  Push the renamed file with sigma play.  This will update the sequent.sys

file on the sign.  Now run my program which sends a file named "A" to the sign and it should work.

Open Sigma Editor:

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1) Click new file

2) enter in "working?"

3) Save to computer as "A.nmg"

4) Exit Sigma editor

5) Rename file to "A" (no extension)

Open Sigma Player:

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6) Click on List Manage

7) Expand My Play List

8) Select all files in the right hand pane and delete them

9) Click the add button and find the "A" file in step 5

10) Send to sign

Compile my program (CinderSerial)

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1) Type in text you want to be displayed

2) Select a color

3) (display mode isnt implemented yet)

4) Click submit