> --- In "Gonzalo A. de la Vega"
> <> wrote:
> >
> > Well, non Wi-Fi doesn't tell us much:
> > *What bitrate do you need?
- At least 250 kbps.
> > *Are you frequency limited?
- Not strictly by frequency. Really looking for something that is
already FCC approved and meets our range requirements. Having a high
degree of interference resistance, via Frequency Hopping, etc., is
required.
> > *Is it a LOS link?
- LOS is out of the question as we are using this for a mobile robot in
a confined range.
> > *Why not WiFi?
- We've been afraid of the seemingly unreliable nature of WiFi. We have
also seen WiFi start to become failure prone in heavy WiFi congestion
areas, e.g. a conference center.
> > *Why not the TS-RF2/AERO?
Couple of reasons, not Ethernet out of the box, range is more than
sufficient.
Some of the key requirements are:
- reliability, reliability, reliability
- low latency, < 10ms
- interference resistant
- TCP/UDP ready
I was hoping that the shorter range would open up more options. Here is
an example of the type of technology that we were thinking about:
http://hardware.gamershell.com/articles/logitech_play_link_wireless_network_extender_review/
These have:
- factory pairing
- 100 ft. range
- encrypted
- up to 1.5 Mbps
- < $100/pair
The only downside is the packaging.
-Ira.
> >
> > --- In "drrock77" <ihoffman@> wrote:
> > >
> > > Hello TS-7X00 folks,
> > >
> > > This isn't exactly a TS-7x00 question, but I know that the
> audience
> > > has a very diverse and deep background/experience.
> > >
> > > I was wondering if anyone has had any experience with a good
> non-WiFi,
> > > low-cost, wireless ethernet bridge for short ranges, < 100 ft. I
> know
> > > that Technologics offers some great products for longer range and
> are
> > > not Ethernet based. The low cost would need to be < $500.00 per
> pair.
> > >
> > > Any input would be appreciated.
> > >
>
> What he said... Also, keep in mind that wifi is stamped out by the
> millions, and thus you can get a very powerful wifi + computer (think
> access point - 200MHz mips computer, with up to 8MB flash and 32 MB
> RAM) for 1/4 of the price of a TS7200....
>
> No other communications technology has that economy of scale right
> now.
>
> We've used serial radios and looked at ethernet radios, but a single
> cheap radio will break your budget - and a pair of good radios +
> antennas will top $4K.
>
> --Yan
>
>
>
>
>
--
Ira Hoffman
Director of Research and Development
Freedom Sciences, LLC
610.585.7640
http://www.freedomsciences.com
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