Subject: From: Date:

Re: [ECS] Security Systems Dan Hoehnen Thu, 14 Jan 1999 16:26:25 -0500 (EST)

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Bill, 

I'll get together some code snippets for you soon.

I bought the napco panel and the GEM-AUTOMATION option you buy comes with 
some minimal documentation.  I have the Omni Pro on loan from HAI and I 
downlaoded everything I needed from their web site.  I just can't 
remember if the serial link protocol doc's were on their web site or if I 
got those e-mailed to me.  In either case, they are very well written and 
easily obtained.

The checksums are usually in hex and may involve more than just adding 
the bytes up, I can't remember for sure.  I'll see what I can find to 
send your way.

> Dan,
> 
> Thanks for the info..  Yes, if you could e-mail me some "snippets" of
> info on the Omni Link that might be helpful.
> 
> Where did you find out information on these panels???  Did you order the
> manuals or ?
> 
> If checksums are involved, I'll need a pointer to a short tutorial; all
> I know is that individual characters are added up and the total appended
> to the message.  When receiving, you add up the incoming and result is
> compared to the incoming checksum; so how do you know when to stop
> adding incoming characters and calculate/compare??  Can the checksum
> exceed 65535?  
> 
> Ah well, so many questions, but first things first.
> 
> Bill Walters
> 

Dan Hoehnen                            
dhoehnen@infinet.com                   
He who dies with the most toys, wins! 
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