Weird Looking: hacking the sign

hacking the sign

September 5, 2008 8:11am (7 years, 5 months and 1 week ago)
tags: none
So right now, I have a simple python app that queries servers over SNMP and displays their load averages on the sign. And the text can flash if a load average seems high, and stuff like that.  I’ll do more later, I just hacked that together yesterday to get something working.

If you try this, you may notice that the sign’s protocol documentation kind of sucks.  Oh, also, its Sigma software only uses that protocol as part of the format of its text files.  It has another, more horrible protocol, in which lots of things are framed as file transfers.  The files being transfered are also in various ugly formats.

Maybe I’ll post some code later, because this would get super-boring if I started throwing out hex codes and what endian integers to use and how it calculates checksums.

I will just say that I’m kind of wishing I’d held out for a better-known brand of sign with a better-documented protocol.


Sep 5, 2008 10:14am
What do you want, a sign that uses SOAP as its protocol?  Where’s the fun in that?
Sep 5, 2008 11:00am
Everything’s' better with an XML interface!

I just don’t like constantly hitting artificial limitations and needlessly complex protocols.  In lieu of a decent sign, I’d accept the ability to rewrite this thing’s firmware.
Sep 5, 2008 12:42pm
Like how it took rewriting the operating system for the Legos Mindstorms sets before you could actually start doing useful things with them? (I see it’s called BrickOS now…it’s a shame they couldn’t keep calling it LegOS.)
Mar 21, 2009 5:08am
Good post, admin.
Mar 21, 2009 7:20am
Good post, admin.
Mar 21, 2009 10:13am
Good post, admin.
Mar 22, 2009 1:53am
Good post, admin.
Mar 22, 2009 7:04am
Good post, admin.
Mar 22, 2009 7:05am
Good post, admin.
Mar 22, 2009 7:05am
Good post, admin.

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