Re: One Bluetooth, two PDA's ?

On Sun, 04 Sep 2005 15:27:05 -0400, Jack Erbes
<jackerbes@xxxxxxxxxxxx> wrote:

>Dale DePriest wrote:
>
>> There is piconet but it cannot be used for serial communication any more
>> that a serial port on a pc can be connected to a network directly.
>> Bluetooth supports many different modes but you have to use the mode
>> that the GPS supports to make a connection.
>>
>
>I did not think he was trying to use Bluetooth for serial
>communications. The OP did not mention what specific hardwares were
>involved but I assumed he had one Bluetooth capable GPS receiver and the
>issue was that he could not receive the GPS data via Bluetooth on a
>Bluetooth capable laptop and a Bluetooth capable PDA simultaneously.
>
>Is that something that cannot be done? If so, I don't understand why not.
>
>Jack

As far as I know, a bluetooth and one device authenticate at
the beginning of a session for security. The recent occurrences of
lifting data from some celebrities' PDAs and such were implemented by
using a "reconnect" function, normally used to restore a dropped
connection. In these cases, it was used in such a way as to hijack the
connection and cause authentication to be made with a third party's
deice.

In short, BT is intended to establish a connection with a
single device for the duration of the session.

In a way, it's similar to the question which comes up often in
this group concerning why a single serial port (connected to a GPSR)
cannot talk simultaneously to two concurrently running applications.
In that case, there are solutions involving the use of virtual ports.
.

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