[Bluez-users] BLueZ Questions

[Bluez-users] BLueZ Questions

[Marcus Mikolaiczyk]

Hi all,

I'm new to the BT and just want to know some things about the BLueZ.
?1 Where can I see what profiles are supported (through what)(SAP?).
As far as I understand we got no 'profiles' but protocols implemented 
through applications within BlueZ.
Example: for the serial profile I would rather say RFCOMM offers a 
serial connection over bt. Right?

I found the slides from Marcel Holtmann from the BT Kongress 2003 which 
show some information for supported protocols/profiles. Are there other 
resources?

Thanks and cheers
Marcus




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Re: [Bluez-users] BLueZ Questions

[Marcel Holtmann]

Hi Marcus,

> I'm new to the BT and just want to know some things about the BLueZ.
> ?1 Where can I see what profiles are supported (through what)(SAP?).
> As far as I understand we got no 'profiles' but protocols implemented 
> through applications within BlueZ.
> Example: for the serial profile I would rather say RFCOMM offers a 
> serial connection over bt. Right?

if the protocol is implemented you can easily have an application
running that provides the profile function.

This is not general, but if you ask what profiles you have in mind, I
can give you a more detailed answer.

> I found the slides from Marcel Holtmann from the BT Kongress 2003 which 
> show some information for supported protocols/profiles. Are there other 
> resources?

Not that I know of. However you can always use the source, Luke ;)

Regards

Marcel




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Re: [Bluez-users] BLueZ Questions

[Marcus Mikolaiczyk]

Hi Marcel,

> if the protocol is implemented you can easily have an application
> running that provides the profile function.
> 
> This is not general, but if you ask what profiles you have in mind, I
> can give you a more detailed answer.

Just shortly descibing our hardware: Embedded Box using an AC45 GSM/GPRS 
Modem (serial  connection) , GPS Samsung modul (serial connection), 
BT-Infioneon singlestone Bluemoon (serial connection).
Profiles looking for:
Serial Profile (through rfcomm ?)
Handsfree (for using a external mobile phone)
SAP (would be nice, cause AC45 supports SAP)
Network(through PAN?)
Fileexchange (through openobex)

> Not that I know of. However you can always use the source, Luke ;)
japp, that's the way i suppose it will end anyway.

Regards Marcus


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Re: [Bluez-users] BLueZ Questions

[Marcel Holtmann]

Hi Marcus,

> > if the protocol is implemented you can easily have an application
> > running that provides the profile function.
> > 
> > This is not general, but if you ask what profiles you have in mind, I
> > can give you a more detailed answer.
> 
> Just shortly descibing our hardware: Embedded Box using an AC45 GSM/GPRS 
> Modem (serial  connection) , GPS Samsung modul (serial connection), 
> BT-Infioneon singlestone Bluemoon (serial connection).

make sure that you adding my latest -mh patch for that kernel.

> Profiles looking for:
> Serial Profile (through rfcomm ?)

To what should this be connected? The GPS or the GSM/GPRS unit?

> Handsfree (for using a external mobile phone)

Are the SCO audio data sent over the PCM interface of the chip?

> SAP (would be nice, cause AC45 supports SAP)

Nobody has written anything like this, because the hardware for testing
is missing. However this works like PDUs over a RFCOMM socket and should
be quite simple.

> Network(through PAN?)

You can use pand for it.

> Fileexchange (through openobex)

Depending on what you wanna do you may need do write some extra code,
but there are a lot of examples.

Regards

Marcel




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Re: [Bluez-users] BLueZ Questions

[Marcus Mikolaiczyk]

Hi Marcel,


> make sure that you adding my latest -mh patch for that kernel.
for Kernel 2.4.19 I do (patch-2.4.19-mh18).
> 
>>Profiles looking for:
>>Serial Profile (through rfcomm ?)
> 
> 
> To what should this be connected? The GPS or the GSM/GPRS unit?
What ever is possible.
-GPS for using a PDA(bt) to get positioning informations to spare a 
separate GPS Module.
-A terminal to connect to from a PC
-Maybe using GSM/GPRS as Dial up connection.
> 
>>Handsfree (for using a external mobile phone)
> 
> 
> Are the SCO audio data sent over the PCM interface of the chip?
In the first Hardware release there's no Audio codec but ther will be 
one in the second. I'm not sure how it will be implemented. In the 
moment the PCM interface is connected to a synchronus serial interface 
on the tc1130. I'll think we got to diskuss this internally more deeply 
to clarify the needs and usage.
> 
>>Fileexchange (through openobex)
> 
> 
> Depending on what you wanna do you may need do write some extra code,
> but there are a lot of examples. 
I thought it's done through the openobex package. I suppose I can find 
example on the openobex project site.

Bye Marcus


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Re: [Bluez-users] BLueZ Questions

[Marcel Holtmann]

Hi Marcus,

> > make sure that you adding my latest -mh patch for that kernel.
> for Kernel 2.4.19 I do (patch-2.4.19-mh18).

this is good, but the kernel is still behind the current state of the
latest 2.6 kernel. See my comments about that in the mailing list
archive.

> >>Profiles looking for:
> >>Serial Profile (through rfcomm ?)
> > 
> > 
> > To what should this be connected? The GPS or the GSM/GPRS unit?
> What ever is possible.
> -GPS for using a PDA(bt) to get positioning informations to spare a 
> separate GPS Module.
> -A terminal to connect to from a PC
> -Maybe using GSM/GPRS as Dial up connection.

Both is possible, but I think you need to write a little program that
listens on a specific RFCOMM channel and then forwards the data from and
to the specific serial ports. This program should also take care of
creating the needed SDP records.

Such a program doesn't really exists, but it is quite easy to do one
based on the current examples.

> >>Handsfree (for using a external mobile phone)
> > 
> > 
> > Are the SCO audio data sent over the PCM interface of the chip?
> In the first Hardware release there's no Audio codec but ther will be 
> one in the second. I'm not sure how it will be implemented. In the 
> moment the PCM interface is connected to a synchronus serial interface 
> on the tc1130. I'll think we got to diskuss this internally more deeply 
> to clarify the needs and usage.

If you have a PCM on your board, then you should simply connect it to
the PCM on the Bluetooth module.

> >>Fileexchange (through openobex)
> > 
> > 
> > Depending on what you wanna do you may need do write some extra code,
> > but there are a lot of examples. 
> I thought it's done through the openobex package. I suppose I can find 
> example on the openobex project site.

It is, but OpenOBEX is only an implementation of the OBEX protocol. You
still need an application that is doing the correct things.

Regards

Marcel




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