Re: CM15A and MisterHouse Module Starting Point

[nobody@xxxxxxxxxxxx (Dave Houston)]

Neil Cherry <njc@xxxxxxxxxxxxx> wrote:

>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).

X-10 still hasn't released any documentation on the protocol?