Re: [J2ME and Bluetooth] Trying to connect 3 mobile phones

From: JScoobyCed (pim_at_pam.poum)
Date: 03/02/05 

Date: Wed, 02 Mar 2005 10:24:47 +0700

Michael Sars Norum wrote:
> Hi
>
> I'm currently working on a research project where we are developing a
> framework for ad hoc network based application on J2ME using Bluetooth
> as a reference implementation in the network layer.
>
> We currently have code running that connects to phones and allows them
> to communicate. However we have problems connecting three phones in a
> network.
>
> So far we have found that device discovery can not be done in parallel
> on the phones. Does this mean that we can not connect a phone to more
> than a single device at a time?
>
> We are currently using the RFCOMM protocal for communication, does this
> force any added restrictions as to how many connections can be open at
> once? The Bluetooth spec states that a Bluetooth piconet can consist of
> up to 8 devices (one master and 7 slaves). Do mobile phones not
> implement this or is it possibly just a limitation in JABWT?
>
> We are currently using 3 phones for testing, SE p900, Nokia 6600 and
> Siemens S65. All three phones have different behaviour as to how they
> handle different events. And the SE p900 actually have an erroneous
> JABWT implementation.
>

Hi,

   I have been working quite a lot with bluetooth and Nokia 6600. It is
supposed to be able to connect up to 7 devices at the same time 9from
the JSR82 if I am right), but Nokia 6600 has a limitation of being able
to open only two connection at a time. That is, once you are connected
to one device, the remaining connection is used for discovery. So you
won't be able to connect to more than one device with a Nokia 6600.
I have no clue about SE P900 or Siemens mobile.
If you need some support, http://benhui.net is very useful (I have no
link with this website, but recieved some good help at the time I was
working on BT and J2ME). 

--
JSC

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