BTW...it is real.  I've seen it, touched it....not used it.  Waiting for a demo unit to do the real range tests, much what I did with the Micrel units, that also go for $10, but of course are not zigbee


--- On Mon, 8/4/08, M. Adam Davis <stienman@gmail.com> wrote:

> From: M. Adam Davis <stienman@gmail.com>
> Subject: Re: [PIC] MRF24J40MA - Microchip's 802.15.4 transceiver
> To: "Microcontroller discussion list - Public." <piclist@mit.edu>
> Date: Monday, August 4, 2008, 1:10 PM
> Shoot, I thought I read it carefully and yet I completely
> missed that
> right on the summary page!
> 
> 1/4 mile in open air under ideal conditions...  I'll
> probably have to
> support both this and the xbee, which complicates a whole
> bunch of
> things.
> 
> Nicely low powered, though.
> 
> Thanks for looking!
> 
> -Adam
> 
> On 8/4/08, Timothy Weber <tw@timothyweber.org> wrote:
> > M. Adam Davis wrote:
> > > Regarding Microchip's new RF transceiver
> module
> > >
> http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1335&dDocName=en535967
> > >
> > > I was wondering if anyone knows the range of this
> particular
> > > implementation?  I realize it depends greatly on
> a variety of factors,
> > > but I'm hoping someone has a ballpark figure
> so I know whether to
> > > target it out of the gate, or build in support
> for the XBEE modules in
> > > case testing comes back with dismal numbers.
> > >
> > > The data sheet appears to have lots of info
> regarding receiver,
> > > transmitter, and antenna performance, but I
> don't know how to turn
> > > that into "ideal" distance.
> >
> > The data sheet does say "Up to 400m Range
> (outdoor, line-of-sight)",
> > which seems pretty impressive on ~20 mA.  And by
> impressive I mean not
> > very plausible - but I'll be interested to see. 
> At $10 in singles, this
> > could give the XBee a real challenge.
> > --
> > Timothy J. Weber
> > http://timothyweber.org
> > --
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> 
> 
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