I have been following BlueTooth for a while, but have not condsidered using
it for our comm because I dont need that much overhead in protocol.

        Their web site is not the best.  You have to find the OEM secion and
look there.  There are basicaly 4 radios there are two baud rates (96K or
250K) and two freqs (900 and 2.4).  Thats all.  I use the 2.4G/96K
transceivers because I need bidirectional comm.  The sensativity is not as
great as the BIM, but the output is much better.  Though the power
consumption is MARKEDLY higher ( about 100mA stand-by and 200mA transmitt).
Power consumption is not a concern for us so it didnt matter.

Transceiver http://www.innomedia.com/wireless/products/spread_spectrum.html

TX/RX units http://www.innomedia.com/wireless/products/lowcost_spread.html



-----Original Message-----
From: Andrew Seddon [mailto:seddona@HOTMAIL.COM]
Sent: Monday, June 26, 2000 7:31 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE][PIC]: Radio modules


>         We have just switched from Radiometrix to Innomedia.  The price is
> the same, but the innomedia uses 900 or 2.4Ghz Spread Spectrum for the
same
> price, and they move at 96K or 250K.  The implimentation is a little
tough,
> but I am more than willing to share.
>

Thanks.. Out of interest which modules do you use? I had a look on their
website but there seemed to be no clear winner. They do however all seem
pretty complicated, obviously a result of spread spectrum. Have you looked
into Bluetooth at all? I gather that the chips can be upped to 100mw at
2.4ghz so that should give reasonable range. I had a look a couple of weeks
ago but again all seems pretty complicated.

Andrew Seddon.