Re: [mh] Z-Wave web accessible

[Jason S. <ja...@sh...>]

I was doing some reading tonight and noticed some interesting feedback on 
Zwave.  I see people claiming that Z-wave is latency is slow and Z-wave 
is fast?!

Here is a couple of links that stood out:
http://archive2.avsforum.com/avs-vb/showthread.php?t=743146
http://www.meedio.com/forum/post-214899.html&sid=279d8784afacde269d316547577afda1

>From what I understand, Z-wave is unlike the other interfaces in that they 
cannot report a local state change to the PC because of a patent that 
Lutron holds preventing that.  That is why most Z-wave devices need to be 
polled.  With X10-BiDi/UPB/Insteon any switch state changes are 
immediately sent out.

On Thu, 13 Dec 2007, David Satterfield wrote:

> Hi Folks,
> I *think* latency goes up with hops, or at least with the "quality" of the RF path from source to target. That's my experience. So Jason, you are reading correctly. The problem is I only have my setup to compare to, running my software, which for all I know is broken in some way. ZWave is not targeted to the hacker types like us. Normally you need to fork over tens of thousands to be a "developer". Leviton put out a scant doc for their serial interface, but it doesn't explain many things, including how their own devices behave, or anything about the different packets that ZWave supports. Leviton technical support disavows all knowledge of this device. As far as I can tell, the routing tables for the network are deliberately hidden from the user, which makes troubleshooting and drawing conclusions about performance pretty hard.I'm trying to find someone who knows how this thing is supposed to work, but that's been an uphill battle. Please chime in with any info that might
> help to fill in the missing puzzle pieces.
> -david
>
>
>
> On Wed, 12 Dec 2007, Neil Cherry wrote:
>
> > Jason Sharpee wrote:
> >
> >> If I were to get Zwave here, I would definitely want to move the antenna
> >> closer to the center of the home.
> >
> > As long as you have registered devices every 25 - 30 ft (maybe more)
> > the signals will traverse the devices to get to the other side.
> > Z-Wave is a mesh network.
>
> >From what I am reading from David, the hops take a while and the closer
> the transmitter is to the devices the quicker the response (.3 - 10 secs)
> difference.
>
> -J
>
> ---------------------------------
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