[Bluez-devel] Troubles with mulitple SCO connections (duplex)

[Bluez-devel] Troubles with mulitple SCO connections (duplex)

[Markus Adolfsson]

[-- Attachment #1.1: Type: text/plain, Size: 1459 bytes --]

Hi all,

I'd like to establish two SCO connections simultaneously using BlueZ 
from my "coordinator" application that in the long run will connect / 
mix the two SCO connections to let two headsets hear each other, as well 
as letting the master controller-application I'm writing to hear both 
headsets...

The app itself is fairly straight forward and I've gotten everything to 
work properly besides one little tiny detail - One SCO connection works 
fine, but once I connect the second SCO connection, all SCO connections 
goes down (without any error from the socket / connect commands)...

Both SCO-connections are still there, the headsets only hear "noise" and 
I have the fealing that the two headsets don't send any audio, but that 
they _do receive_ on the SCO connections... Strange!

Is this a packet-type issue and if so - how can I set the packet-types 
from "within" the BlueZ lib / my app?

Regards,
/Markus Adolfsson

-- 
------------------------------------------------------------------------
*Markus Adolfsson*
M.Sc.CE. Product Development
Mail: 	markus.adolfsson@free2move.net 
<mailto:markus.adolfsson@free2move.net>
Phone: 	+46 35 152268 <callto:+4635152268>
Mobile: 	+46 707 165296 <callto:+46707165296>

	
*Free2move AB* -- /WIRELESS MADE EASY/
Phone: 	+46 35 152260 <callto:+4635152260>
Fax: 	+46 35 152269 <callto:+4635152269>
Web: 	www.free2move.net <http://www.free2move.net>
Address: 	Sperlingsgatan 7
SE-30248 Halmstad
Sweden


[-- Attachment #1.2: Type: text/html, Size: 2994 bytes --]

[-- Attachment #2: markus.adolfsson.vcf --]
[-- Type: text/x-vcard, Size: 269 bytes --]

begin:vcard
fn:Markus Adolfsson
n:Adolfsson;Markus
org:Free2move;Product Development
adr:;;Sperlingsgatan 7;Halmstad;;302 48;Sweden
email;internet:markus.adolfsson@free2move.net
title:M.Sc.C.E.
tel;work:+46 35 152268
url:http://www.free2move.net
version:2.1
end:vcard


[-- Attachment #3: Type: text/plain, Size: 345 bytes --]

-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys-and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV

[-- Attachment #4: Type: text/plain, Size: 164 bytes --]

_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel

Re: [Bluez-devel] Troubles with mulitple SCO connections (duplex)

[Jose Vasconcellos]

What you are seeing is normal. The current code only supports one 
connection.
It would be better if the existing code simply would fail to open a second
connection to avoid a lot of confusion.


-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys-and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel

Re: [Bluez-devel] Troubles with mulitple SCO connections (duplex)

[Markus Adolfsson]

[-- Attachment #1.1: Type: text/plain, Size: 1839 bytes --]

Hi Jose,

My spontaneous reaction would be; really?

My code is based on the socket-abstraction in BlueZ and it works fine 
for multiple ACL connections, and the SCO-option is only a second 
socket-invocation on top of that...? Confusing... There has to be some 
way to solve this? Setting SCO packet type to HV1 allows for three 
simultaneous SCO connections AFAIK - so this should not be limited in 
BlueZ - and if it really is, then why and how do I work around that.... 
I mean, RF_COMM / ACL sockets work just fine...

Regards,
Markus Adolfsson

Jose Vasconcellos skrev:
> What you are seeing is normal. The current code only supports one 
> connection.
> It would be better if the existing code simply would fail to open a second
> connection to avoid a lot of confusion.
>
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share your
> opinions on IT & business topics through brief surveys-and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> Bluez-devel mailing list
> Bluez-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-devel
>   

-- 
------------------------------------------------------------------------
*Markus Adolfsson*
M.Sc.CE. Product Development
Mail: 	markus.adolfsson@free2move.net 
<mailto:markus.adolfsson@free2move.net>
Phone: 	+46 35 152268 <callto:+4635152268>
Mobile: 	+46 707 165296 <callto:+46707165296>

	
*Free2move AB* -- /WIRELESS MADE EASY/
Phone: 	+46 35 152260 <callto:+4635152260>
Fax: 	+46 35 152269 <callto:+4635152269>
Web: 	www.free2move.net <http://www.free2move.net>
Address: 	Sperlingsgatan 7
SE-30248 Halmstad
Sweden


[-- Attachment #1.2: Type: text/html, Size: 3730 bytes --]

[-- Attachment #2: markus.adolfsson.vcf --]
[-- Type: text/x-vcard, Size: 269 bytes --]

begin:vcard
fn:Markus Adolfsson
n:Adolfsson;Markus
org:Free2move;Product Development
adr:;;Sperlingsgatan 7;Halmstad;;302 48;Sweden
email;internet:markus.adolfsson@free2move.net
title:M.Sc.C.E.
tel;work:+46 35 152268
url:http://www.free2move.net
version:2.1
end:vcard


[-- Attachment #3: Type: text/plain, Size: 345 bytes --]

-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys-and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV

[-- Attachment #4: Type: text/plain, Size: 164 bytes --]

_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel

Re: [Bluez-devel] Troubles with mulitple SCO connections (duplex)

[Brad Midgley]

Markus

> My spontaneous reaction would be; really?
> 
> My code is based on the socket-abstraction in BlueZ and it works fine
> for multiple ACL connections

Marcel says the usb layer needs a rewrite to accommodate this. It has
something to do with resource allocation on usb iirc.

It does work now on systems that use a serial hci connection (mostly
embedded) but that may not help you.

Brad

-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys-and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel

Re: [Bluez-devel] Troubles with mulitple SCO connections (duplex)

[Markus Adolfsson]

[-- Attachment #1.1: Type: text/plain, Size: 1901 bytes --]

Hi Brad,

Ok -- that does make my life a bit easier ;)

The target-platform for my app is indeed an embedded one with a serial 
interface to a BT module, so that's fine... However I'm developing the 
app on a "real" computer using an USB dongle, but I'll try to 
cross-compile and go for the intended target-platform instead and keep 
my fingers crossed...

Thanks all for your input!
/Markus

Brad Midgley skrev:
> Markus
>
>   
>> My spontaneous reaction would be; really?
>>
>> My code is based on the socket-abstraction in BlueZ and it works fine
>> for multiple ACL connections
>>     
>
> Marcel says the usb layer needs a rewrite to accommodate this. It has
> something to do with resource allocation on usb iirc.
>
> It does work now on systems that use a serial hci connection (mostly
> embedded) but that may not help you.
>
> Brad
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share your
> opinions on IT & business topics through brief surveys-and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> Bluez-devel mailing list
> Bluez-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-devel
>   

-- 
------------------------------------------------------------------------
*Markus Adolfsson*
M.Sc.CE. Product Development
Mail: 	markus.adolfsson@free2move.net 
<mailto:markus.adolfsson@free2move.net>
Phone: 	+46 35 152268 <callto:+4635152268>
Mobile: 	+46 707 165296 <callto:+46707165296>

	
*Free2move AB* -- /WIRELESS MADE EASY/
Phone: 	+46 35 152260 <callto:+4635152260>
Fax: 	+46 35 152269 <callto:+4635152269>
Web: 	www.free2move.net <http://www.free2move.net>
Address: 	Sperlingsgatan 7
SE-30248 Halmstad
Sweden


[-- Attachment #1.2: Type: text/html, Size: 3867 bytes --]

[-- Attachment #2: markus.adolfsson.vcf --]
[-- Type: text/x-vcard, Size: 269 bytes --]

begin:vcard
fn:Markus Adolfsson
n:Adolfsson;Markus
org:Free2move;Product Development
adr:;;Sperlingsgatan 7;Halmstad;;302 48;Sweden
email;internet:markus.adolfsson@free2move.net
title:M.Sc.C.E.
tel;work:+46 35 152268
url:http://www.free2move.net
version:2.1
end:vcard


[-- Attachment #3: Type: text/plain, Size: 345 bytes --]

-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys-and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV

[-- Attachment #4: Type: text/plain, Size: 164 bytes --]

_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel

Re: [Bluez-devel] Troubles with mulitple SCO connections (duplex)

[Markus Adolfsson]

[-- Attachment #1.1: Type: text/plain, Size: 3444 bytes --]

For what it's worth;

After having cross-compiled to my embedded system and leaving the 
USB-dongle solution behind, everything now works like a breeze and I now 
have a BT device hosting running 2 SCO connections and 3 RF_COMM sockets 
simultaneously.

Thanks for your help along the way!
/Markus

Markus Adolfsson skrev:
> Hi Brad,
>
> Ok -- that does make my life a bit easier ;)
>
> The target-platform for my app is indeed an embedded one with a serial 
> interface to a BT module, so that's fine... However I'm developing the 
> app on a "real" computer using an USB dongle, but I'll try to 
> cross-compile and go for the intended target-platform instead and keep 
> my fingers crossed...
>
> Thanks all for your input!
> /Markus
>
> Brad Midgley skrev:
>> Markus
>>
>>   
>>> My spontaneous reaction would be; really?
>>>
>>> My code is based on the socket-abstraction in BlueZ and it works fine
>>> for multiple ACL connections
>>>     
>>
>> Marcel says the usb layer needs a rewrite to accommodate this. It has
>> something to do with resource allocation on usb iirc.
>>
>> It does work now on systems that use a serial hci connection (mostly
>> embedded) but that may not help you.
>>
>> Brad
>>
>> -------------------------------------------------------------------------
>> Take Surveys. Earn Cash. Influence the Future of IT
>> Join SourceForge.net's Techsay panel and you'll get the chance to share your
>> opinions on IT & business topics through brief surveys-and earn cash
>> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
>> _______________________________________________
>> Bluez-devel mailing list
>> Bluez-devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/bluez-devel
>>   
>
> -- 
> ------------------------------------------------------------------------
> *Markus Adolfsson*
> M.Sc.CE. Product Development
> Mail: 	markus.adolfsson@free2move.net 
> <mailto:markus.adolfsson@free2move.net>
> Phone: 	+46 35 152268 <callto:+4635152268>
> Mobile: 	+46 707 165296 <callto:+46707165296>
>
> 	
> *Free2move AB* -- /WIRELESS MADE EASY/
> Phone: 	+46 35 152260 <callto:+4635152260>
> Fax: 	+46 35 152269 <callto:+4635152269>
> Web: 	www.free2move.net <http://www.free2move.net>
> Address: 	Sperlingsgatan 7
> SE-30248 Halmstad
> Sweden
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share your
> opinions on IT & business topics through brief surveys-and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> ------------------------------------------------------------------------
>
> _______________________________________________
> Bluez-devel mailing list
> Bluez-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-devel
>   

-- 
------------------------------------------------------------------------
*Markus Adolfsson*
M.Sc.CE. Product Development
Mail: 	markus.adolfsson@free2move.net 
<mailto:markus.adolfsson@free2move.net>
Phone: 	+46 35 152268 <callto:+4635152268>
Mobile: 	+46 707 165296 <callto:+46707165296>

	
*Free2move AB* -- /WIRELESS MADE EASY/
Phone: 	+46 35 152260 <callto:+4635152260>
Fax: 	+46 35 152269 <callto:+4635152269>
Web: 	www.free2move.net <http://www.free2move.net>
Address: 	Sperlingsgatan 7
SE-30248 Halmstad
Sweden


[-- Attachment #1.2: Type: text/html, Size: 7203 bytes --]

[-- Attachment #2: markus.adolfsson.vcf --]
[-- Type: text/x-vcard, Size: 269 bytes --]

begin:vcard
fn:Markus Adolfsson
n:Adolfsson;Markus
org:Free2move;Product Development
adr:;;Sperlingsgatan 7;Halmstad;;302 48;Sweden
email;internet:markus.adolfsson@free2move.net
title:M.Sc.C.E.
tel;work:+46 35 152268
url:http://www.free2move.net
version:2.1
end:vcard


[-- Attachment #3: Type: text/plain, Size: 345 bytes --]

-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys-and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV

[-- Attachment #4: Type: text/plain, Size: 164 bytes --]

_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel

Re: [Bluez-devel] Troubles with mulitple SCO connections (duplex)

[Mayank BATRA]

> For what it's worth;
	
> After having cross-compiled to my embedded system and leaving the
USB-dongle solution behind, everything now works like a breeze and I now
have a BT device hosting running 2 SCO connections and 3 RF_COMM sockets
simultaneously.
	
And what packet types are these two SCO connectionis using now?

-Mayank


-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys-and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel

Re: [Bluez-devel] Troubles with mulitple SCO connections (duplex)

[Markus Adolfsson]

[-- Attachment #1.1: Type: text/plain, Size: 1762 bytes --]

I actually set the packet-types to "ALL SCO" and let stack do its magic 
work according to your suggestions, but in reality it turned out to use 
HV3 which makes sense as that imply (AFAIK) that 2/3 of the bandwidth is 
used for the two SCO connections, leaving 1/3 left for the 3 RF_COMM 
connections.

/Markus

Mayank BATRA skrev:
>> For what it's worth;
>>     
> 	
>   
>> After having cross-compiled to my embedded system and leaving the
>>     
> USB-dongle solution behind, everything now works like a breeze and I now
> have a BT device hosting running 2 SCO connections and 3 RF_COMM sockets
> simultaneously.
> 	
> And what packet types are these two SCO connectionis using now?
>
> -Mayank
>
>
> -------------------------------------------------------------------------
> Take Surveys. Earn Cash. Influence the Future of IT
> Join SourceForge.net's Techsay panel and you'll get the chance to share your
> opinions on IT & business topics through brief surveys-and earn cash
> http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
> _______________________________________________
> Bluez-devel mailing list
> Bluez-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-devel
>   

-- 
------------------------------------------------------------------------
*Markus Adolfsson*
M.Sc.CE. Product Development
Mail: 	markus.adolfsson@free2move.net 
<mailto:markus.adolfsson@free2move.net>
Phone: 	+46 35 152268 <callto:+4635152268>
Mobile: 	+46 707 165296 <callto:+46707165296>

	
*Free2move AB* -- /WIRELESS MADE EASY/
Phone: 	+46 35 152260 <callto:+4635152260>
Fax: 	+46 35 152269 <callto:+4635152269>
Web: 	www.free2move.net <http://www.free2move.net>
Address: 	Sperlingsgatan 7
SE-30248 Halmstad
Sweden


[-- Attachment #1.2: Type: text/html, Size: 3796 bytes --]

[-- Attachment #2: markus.adolfsson.vcf --]
[-- Type: text/x-vcard, Size: 269 bytes --]

begin:vcard
fn:Markus Adolfsson
n:Adolfsson;Markus
org:Free2move;Product Development
adr:;;Sperlingsgatan 7;Halmstad;;302 48;Sweden
email;internet:markus.adolfsson@free2move.net
title:M.Sc.C.E.
tel;work:+46 35 152268
url:http://www.free2move.net
version:2.1
end:vcard


[-- Attachment #3: Type: text/plain, Size: 345 bytes --]

-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys-and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV

[-- Attachment #4: Type: text/plain, Size: 164 bytes --]

_______________________________________________
Bluez-devel mailing list
Bluez-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/bluez-devel