Re: [Bluez-devel] (no subject)

[Fabrizio Guglielmino <guglielmino@infitsrl.com>]

jm ha scritto:
> Hi Fabrizio,
>
> I think connection attempts (pscan procedure) are serialized by the dongl=
e, =

> so maybe you should do the sdp queries sequentially and create the thread
> when the connection is ready. You can also try to reduce the page timeout =

> with "hciconfig pageto" to discard soon devices not in range at connection
> time.
>
> Someone please correct me if I'm wrong.
>
> Jos=E9 Miguel
>
>
>   =

>> Hi all,
>> I made a simple software to send small pictures to all bluetooth  =

>> devices in range (it's used by a museum ).
>> This software is made in C using bluez api, I've used two bluetooth  =

>> dongles : one to make periodic inquiry (not with HCI periodic inquiry  =

>> command by with a loop) and the other to make sdp query looking for  =

>> obex push service and sending image.
>> My requirement was to use this software in some embedded linux based  =

>> computer so I chose to limit external library, I made all using  =

>> pthread so there is an infinite thread for inquiries and one thread  =

>> to handle every sdp query and relative connection when devices are  =

>> discovered. I've discarded also using python or other scripting  =

>> languages for the platfom limitations.
>>
>> All works but I found it not so efficient, also with 6/7 devices it's  =

>> really slow to identify and connect to devices, some times connection  =

>> are unexpectedly closed and so on....
>>
>> Is it my approch to the problem wrong or bluetooth protocol is not  =

>> suitable for this type of use?
>>
>> I'm using libs version 3.7-1 (on debian 4.0)
>>
>> Many thanks
>> Fabrizio
>>   =

>>
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>>     =

>
>
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>   =

Thanks for suggestions, as You can read in my response to Marcel sdp =

query are already serialized but I find useful the use
of "pageto" to discard devices out of range. I'm also avaluating using =

inquiry with RSSI for this.

Thanks
Fabrizio

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