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Subject: Re: Radio Modules for AMR
X-Newsreader: Microsoft Outlook Express 6.00.2600.0000
Date: Wed, 18 Sep 2002 21:22:33 GMT
NNTP-Posting-Date: Wed, 18 Sep 2002 14:22:33 PDT
Organization: EarthLink Inc. -- http://www.EarthLink.net
"Bill Lewis" wrote in message
> Hello Bill
Thnaks for the reply. The data rate need not be that high. Frankly it can
be what it needs to be. I was just using the low end figure of what is
claimed for a number of OTS modules I have been perusing. I am just a little
frustrated trying to buy a radio module at the moment.
> 1200 baud is a bit high. If you want 400m range then i suggest you use a
> much lower baud rate (how often do u need to read a meter!?) with a random
> transmit delay that will mean all meters will be heard in say 24 hours or
> The reason for the lower baud rate is the increased range capabilities and
> the simplification of the transmitter (cost etc..).
> You could use OTS transmitters or a custom one and a custom Receiver (this
> bits performance is more important).
> I don't have an instant OTS solution but if you are interested in
> this product then mail me.
> I have developed a similar system before.
> just remove the capitals from my Email for antiSPAM.
> Bill Lewis
> Engineering Director
> Kijoma Solutions Ltd
> RF - Analogue - Digital - Software
> Electronic Product Design & Consultancy
> Email : news@kiSPjoAMma.com ( remove the spam)
> There are only 10 types of the people in the world
> those who understand binary and those who don't
> "Tony" wrote in message
> > Hello
> > I am putting together a system to read water meters that are scattered
> > among ~35 buildings. I am considering both direct transmission to a
> > location (shop) or designing each data collection device to act as a
> > repeater. The second option would allow the devices to be used elsewhere
> > places where the buildings were farther apart. And so I lean toward that
> > way. But naturally that is a lot more complex. And involves Transceivers
> > instead of transmitters. But they can be much less powerful that way.
> > I welcome advice from those with experience trying the two schemes or
> > related activities. And most of all I would appreciate help in finding
> > Radio Modules. There are plenty of web sites that go on and on about how
> > wonderfull there product is. But there is no online store. And the
> > have sent just dissapear. I want to buy a pair and take them to the
> > And test them to make sure the local conditions will allow them to work
> > properly. Then I will design them in to my product. I do not have much
> > experience with radio. Maybe you can tell that? If there are any vendors
> > reading this that would like to do buisness. Please reply soon. Include
> > numbers and prices and estimated delivery dates. I need a 400m range for
> > transmitter. Or 100m for a transceiver. And a data rate of 1200baud will
> > adequate. Like every project this one has a time limit. And I need to
> > moving. Burying cable for rs485 is such a pain.
> > Tony
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