[hen-mgmt] Re: [Sensors] Mote testbeds

[Piers O'Hanlon]

Yes it had occurred to me that USB might be simpler as there appear to more 
devices that are ship with USB (though I'm no expert). Though Adam's point 
does make things tricky....however there are a couple of potential options:
- USB over IP hardware - This seems to be thin on the ground and currently a 
bit expensive (e.g. Digi's AnywhereUSB at around $250 for a 5 port USB over 
IP solution).
- Distributed USB over IP using PCs - There's quite a nice project that 
provides for extending USB over IP from one host PC (linux) to another: 
http://usbip.naist.jp

Neither is ideal, though the second could be neat - maybe we should be 
thinking of semi-managed machines whereby such hardware resources may be 
shared between machines.

If there are some suitable PoE motes then I guess these would be best.

Piers

On 19/09/05, Adam Greenhalgh <a.greenhalgh at cs.ucl.ac.uk> wrote:
> 
> There is a downside as USB requires PCs to be near by or cabling to
> work over a largish distances . If you look around the 7th floor there
> is no central control of the PCs, each is administered by a different
> person. The only common infrastructure we have that is likely to be
> able to scale long term is ethernet.
> 
> Adam
> 
> On 18/09/05, Brad Karp <bkarp+ at cs.cmu.edu> wrote:
> > Ramesh Govindan at USC has told me that his lab has had great success
> > using USB for the mote control channel. The USB interface hardware for
> > each mote is far cheaper than that for Ethernet, and Ramesh reports
> > that the USB interface offers equivalent functionality.
> >
> > I don't recall right now if his lab is *powering* the motes using USB,
> > as well; I'll ask him.
> >
> > I think we should definitely look into this USB control channel
> > approach, as it will let us stretch our funds further, and there
> > doesn't appear to be any down side.
> >
> > -Brad, bkarp at cs.cmu.edu
> >
> > On Sun, Sep 18, 2005 at 08:48:33PM +0100, Adam Greenhalgh wrote:
> > > Interestingly it would seem that all test beds in the presenstations
> > > linked from here use ethernet as the control channel. They also seem
> > > to use a separate power controller. I don't think we can do this with
> > > the setup in the current building, we have no ceiling voids to put
> > > things like power in. I think PoE might have to be our answer.
> > >
> > > Looking at PoE solutions I think we probably are going to need a mix
> > > of a large 24 port PoE switch and some smaller desk mounted PoE
> > > switches to give us flexibility.
> > >
> > > Adam
> > >
> > > On 18/09/05, Dima Diall <dimadiall at gmail.com> wrote:
> > > > Hello all:
> > > >
> > > > I had this unfinished message in my drafts since August due to lack 
> of
> > > > time near the end of the final project. It was intended to be a
> > > > follow-up to the (first?) "UCL-CS Motes Meeting", sponsored by Steve
> > > > Hailes (in late July)... I'll just finish it off with what I still
> > > > remember, regarding the department's plan to set up a mote testbed.
> > > >
> > > > I think the first approach was the "ceiling array" at Berkeley:
> > > > 
> https://mail.millennium.berkeley.edu/pipermail/tinyos-help/2005-July/010708.html
> > > >
> > > > Furthermore, in the last TinyOS Technology Exchange Mote four 
> projects
> > > > related to testbed deployment and management were presented. Links 
> are
> > > > provided on the TTX II page (search under the heading "Embedded
> > > > Wireless Networking Testbeds"):
> > > > http://www.tinyos.net/ttx-02-2005/
> > > >
> > > > There also is a working group on TinyOS testbeds but with very 
> little
> > > > activity so far:
> > > > http://www.tinyos.net/scoop/special/working_group_tinyos_testbed
> > > >
> > > > At the time when I started this I had more details, but it has
> > > > vanished by now ;-)
> > > > --
> > > > /dima, http://www.cs.ucl.ac.uk/students/d.diall/
> > > >
> > > > _______________________________________________
> > > > Sensors mailing list
> > > > Sensors at cs.ucl.ac.uk
> > > > http://oakham.cs.ucl.ac.uk/mailman/listinfo/sensors
> > > >
> > >
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> > >
> >
> 
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