On Mon, 13 Sep 2004, Martin McCormick wrote:

> 	The hardest part may be in reverse-engineering the data stream
> since the company may not want you to know how that part works or it
> may be hard finding anybody who does know how it works even if they
> are willing to help.

You might find that most very low cost devices do not bother with encoding 
to the point where you can't be sure you're not reading the neighbor's 
unit. Nobody really wants to compete with something that retails for 
$29.90 and includes custom glass lcd, rx/tx, two microprocessors, two 
plastic molded cases and other stuff. There is a pretty good chance that 
all you need is a friend with a spectrum analyzer or tune-through UHF 
radio to get at the data stream. In fact 433 MHz is close enough to the 
432 MHz (ex ?) amateur band (or rather, *in* it). By the way, what's the 
status of the 432 MHz amateur band now ?

Peter
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