From: Michal Semler <cijoml@volny.cz>
To: bluez-users@lists.sourceforge.net
Subject: Re: [Bluez-users] position of multiple bluetooth dongles
References: <420B9635.6020701@gmx.ch> <200502101825.15870.cijoml@volny.cz> <4210419A.6030400@gmx.ch>
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Date: Mon, 14 Feb 2005 10:02:23 +0100

Safe distance is about 1m. in 1.1 dongles for 10 meters...10 meters for 1.1=
=20
for 100 meters.

M.

Dne po 14. =FAnora 2005 7:13 Marco Trudel napsal(a):
> Hello Michael
>
> thank you a lot for this information.
> Another question regarding this topic:
>
> Does it help/make any difference if the two dongles have a distance of
> ~11cm? Does this lead to equivalent/less interferences?
> I have no idea about how radios send out their signals. I could imagine
> that if they spread their signal and there's another dongle just above the
> sending one that sends out a signal too, the interference is much worse
> than if they have a little distance, because the point of the problem is
> not right at the source.
>
> Will rfcomm ensure the correctness of received data? something like a
> checksum and automatic retransmission of data if a brocken packet is
> recognized?
>
> regards
> Marco Trudel
>
> Michal Semler wrote:
> > BT 1.1 dongles may interference...
> > BT 1.2 only when comunication with 1.1 devices - 1.2 devices can never
> > interference
> >
> > Michal
> >
> > Dne =E8t 10. =FAnora 2005 18:13 Marco Trudel napsal(a):
> >>Hello everybody
> >>
> >>Maybe someone knows this:
> >>If two bluetooth dongles are used (a class1 and a class2), could it lead
> >> to signal interfereces/problems if they're just above each other and
> >> both have to send a lot of data at the same time?
> >>
> >>With "right above each other", I mean this:
> >>http://www1.ch2.conrad.com/m/7000_7999/7100/7160/7162/716282_LB_00_FB.E=
PS
> >>.j pg (dongle cases are removed).
> >>
> >>
> >>kind regards
> >>Marco
> >>
> >>
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=2D-=20
S pozdravem

Michal Semler


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