Re: [Bluez-users] suitable BT USB dongle

["siddhant tewari" <siddhant.tewari@gmail.com>]

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hi bluez.mexon,

                    Thanks for the reply especially for the fine details
which would have taken some effort to jolt down. I think you have answered
all of my questions very clearly.

I would need class 1 dongle , as there is a need to establish connection
with devices which may be 100mt apart.

Thanks again for the reply.

regards
siddhant

On 3/14/07, bluez.mexon@spamgourmet.com <bluez.mexon@spamgourmet.com> wrote:
>
> siddhant tewari - siddhant.tewari@gmail.com wrote:
> > hi Marcel,
> >              Can you suggest which BT USB dongle i should use , which
> can
> > support all the latest bluetooth 2.0 specification features namely:-
> >
> >              i) EDR.
> >              ii) Multiple Connections.
> >
> > With bluez.
>
> Since no-one else has piped up, and I've recently been through this
> myself, here's my experience...
>
> First, you want a dongle with the CSR (Cambridge Silicon Radio)
> "Bluecore" chipset.  There are various versions of Bluecore, the latest
> seems to be Bluecore 4.  CSR chips seems to be more stable and just
> generally work better.  Also, since the bluez developers all prefer CSR
> chips, the equipment they buy for themselves tends to be CSR, which
> means bluez tends to be better supported with CSR.
>
> Of course that now raises the question, how can you know which dongles
> are CSR?  And it's not easy.  There's some information here from the
> last time I asked:
>
>
> http://sourceforge.net/mailarchive/forum.php?thread_id=31657125&forum_id=1883
>
> If you get a Bluetooth 2.0 dongle, then you definitely have EDR (unless
> I've spectacularly misunderstood something).  EDR is basically the whole
> point of Bluetooth 2.0.
>
> Similarly, every bluetooth dongle, no matter what version, should
> support multiple connections.  Mainly this is up to the software to
> support elegantly.
>
> Having said that though, I recently bought a dongle and tried to use it
> with a bluetooth headset (high quality audio, A2DP) and a mouse
> simultaneously.  If I was using the mouse, the audio kept cutting out.
> I don't know if this is the fault of the hardware or the software.  But
> in any case, multiple connections were working, it's just that they
> weren't working fast enough for A2DP.  Maybe if it was a Bluetooth 2.0
> dongle this would have worked better.
>
> And the last question is, what range do you need?  My experience has
> been that if the devices are in the same room, a class 2 device is
> enough, but if you want to communicate between rooms, get a class 1
> device.  Most bluetooth dongles are class 2, so if you need class 1 it
> might be harder to find something.
>
> Hope this helps, and I hope other people reading the list will jump in
> to correct anything I've got wrong.
>
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