Re: X-10 RF Freq Mod

[nobody@xxxxxxxxxxxx (Dave Houston)]

Just Another Joe <address@xxxxxxx> wrote:

>On Sat, 23 Dec 2006 12:32:13 GMT, nobody@xxxxxxxxxxxx (Dave Houston)
>wrote in message <458d1d98.684393375@xxxxxxxxxxxxx>:

[snip]

>> It's a little more complicated. You need a receiver of the same frequency
>> and the receiver module needs to have enough smarts to decode the RF and
>> output something you can act on.
>
>Yes, I was wondering about that.  From what I can see regarding the
>(optional?) RF receiver on roZetta, it simply provides a signal
>envelope, and requires the cpu to supply all the smarts?

And because the CPU has limited capability and there is limited EEPROM for
code and data, I need to offload this type of input. The cpu and optional
receiver will handle X-10 and a few other simple things that use the same
frequency.

>> Most of the suppliers of security devices have wireless motion sensors. I do
>> not want to support these directly in roZetta because each protocol
>> supported requires some amount of code space and code space is somewhat
>> sparse. I will design separate modules with RF receiver and a PIC that will
>> receive, decode and output via RS232/RS485. You can input this via any of
>> roZetta's serial ports or the RS485 network. This requires minimal internal
>> code space. Initially, I want to limit this to a few of the most widely used
>> like GE ITI, Caddx, Visonic. It also needs to be limited to ones using ASK
>> modulation and frequencies which the 8-pin Wen Shing or Radiotronix RF
>> receiver I prefer can handle.
>
>That sounds fine to me.  I'll try to find some info/prices on the names
>you mentioned, to see if I can afford them :-).  The motion sensors must
>(for me at least) take a second place to handling Insteon.

I've started a thread on the roZetta group dealing with this and listing the
devices of this type that I plan to support initially.


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