Re: CM15A and MisterHouse Module Starting Point

[Neil Cherry <njc@xxxxxxxxxxxxx>]

On 1 Sep 2005 17:14:09 -0700, Paul wrote:
> Thanks for the link Neil.
>
> How did you analyze the cm15a communication?  Some kind of line
> analyzer?  I'm thinking that there shouldn't be an arbitrary delay
> between addressing the devices and commanding them.
> Any ideas or can I email you privately?

I think I used USB Snoopy on a Window 2K box (I need that for some of
my uController development software). Line analyzers go for around 2K,
expensive. The delay is not arbitrary (though the commands should be
buffered), X10 is slow. Remember that it take approximately 1/2 a
second to send the first part of the command and half a second for the
second part of the command (.833 ms actually on 60 Hz, 1s on 50 Hz).
At 4800 that's a lot of commands that can be sent but can not be
processed. I don't know much about the uController being used but I'm
willing to be it's got RAM limited memory. Had this been one of the
PIC14's (16F877 I've be abe to tell you more exact assumptions).

You can contact me via email, no problem.

--
Linux Home Automation         Neil Cherry       ncherry@xxxxxxxxxxx
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