[Bluez-users] bluetooth connection goes down

[Bluez-users] bluetooth connection goes down

[Manjunath Prabhu]

hi marcel and all,
I have the following doubts

1> I use "hcitool cc <bt_addr> command " to connect to my neighboring 
BT device. The first few times this connects with no errors.  After
sometime, the connection goes down for some reason and if I try yo
coonect again, I get an error saying

"Can't create connection: Input/output error"......can someone tell me
as to why i am getting this error.

2> I use bnep for tcp/ip communication and this connection also goes
down after sometime. I try to connect using "pand --connect
<bt_addr>"....and in /var/log/daemon.log in get the following lines

Nov 16 19:42:29 edpc449 pand[2128]: Bluetooth PAN daemon
Nov 16 19:42:29 edpc449 pand[2128]: Connecting to <bt_addr>
Nov 16 19:42:29 edpc449 pand[2128]: Connect to <bt_addr> failed.
Operation already in progress(114)

I have tried killing the processes and connection(using pand --kill)
on both sides....and then restarting them....but to no effect. Only a
clean reboot seems to be the solution.
Hope u can help me with this too.

regards,
manjunath


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Re: [Bluez-users] bluetooth connection goes down

[Marcel Holtmann]

Hi,

> I have the following doubts
> 
> 1> I use "hcitool cc <bt_addr> command " to connect to my neighboring 
> BT device. The first few times this connects with no errors.  After
> sometime, the connection goes down for some reason and if I try yo
> coonect again, I get an error saying
> 
> "Can't create connection: Input/output error"......can someone tell me
> as to why i am getting this error.

the "hcitool cc ..." command is only for testing. Don't use it.

> 2> I use bnep for tcp/ip communication and this connection also goes
> down after sometime. I try to connect using "pand --connect
> <bt_addr>"....and in /var/log/daemon.log in get the following lines
> 
> Nov 16 19:42:29 edpc449 pand[2128]: Bluetooth PAN daemon
> Nov 16 19:42:29 edpc449 pand[2128]: Connecting to <bt_addr>
> Nov 16 19:42:29 edpc449 pand[2128]: Connect to <bt_addr> failed.
> Operation already in progress(114)
> 
> I have tried killing the processes and connection(using pand --kill)
> on both sides....and then restarting them....but to no effect. Only a
> clean reboot seems to be the solution.
> Hope u can help me with this too.

What kernel version is this? Stop using "hcitool cc ...".

Regards

Marcel




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Re: [Bluez-users] bluetooth connection goes down

[Manjunath Prabhu]

hi,
1> i am using the hcitool to get the rssi, lq and tpl
values........hcitool gives me these values only after a "cc" to my
neighbor BT device. Is there some other method to get these values????
Also, are there any other performance parameters specific to BT i can
measure, like delay??

2> I am using linux kernel 2.6.6 and currently available bluetooth
debian packages.

regards,
manjunath

On Tue, 16 Nov 2004 15:53:55 +0100, Marcel Holtmann <marcel@holtmann.org> wrote:
> Hi,
> 
> > I have the following doubts
> >
> > 1> I use "hcitool cc <bt_addr> command " to connect to my neighboring
> > BT device. The first few times this connects with no errors.  After
> > sometime, the connection goes down for some reason and if I try yo
> > coonect again, I get an error saying
> >
> > "Can't create connection: Input/output error"......can someone tell me
> > as to why i am getting this error.
> 
> the "hcitool cc ..." command is only for testing. Don't use it.
> 
> 
> 
> > 2> I use bnep for tcp/ip communication and this connection also goes
> > down after sometime. I try to connect using "pand --connect
> > <bt_addr>"....and in /var/log/daemon.log in get the following lines
> >
> > Nov 16 19:42:29 edpc449 pand[2128]: Bluetooth PAN daemon
> > Nov 16 19:42:29 edpc449 pand[2128]: Connecting to <bt_addr>
> > Nov 16 19:42:29 edpc449 pand[2128]: Connect to <bt_addr> failed.
> > Operation already in progress(114)
> >
> > I have tried killing the processes and connection(using pand --kill)
> > on both sides....and then restarting them....but to no effect. Only a
> > clean reboot seems to be the solution.
> > Hope u can help me with this too.
> 
> What kernel version is this? Stop using "hcitool cc ...".
> 
> Regards
> 
> Marcel
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by: InterSystems CACHE
> FREE OODBMS DOWNLOAD - A multidimensional database that combines
> robust object and relational technologies, making it a perfect match
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> Bluez-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-users/listinfo/bluez-users
>


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Re: [Bluez-users] bluetooth connection goes down

[Marcel Holtmann]

Hi Manjunath,

> 1> i am using the hcitool to get the rssi, lq and tpl
> values........hcitool gives me these values only after a "cc" to my
> neighbor BT device. Is there some other method to get these values????
> Also, are there any other performance parameters specific to BT i can
> measure, like delay??

the RSSI, link quality and transmit power level commands of hcitool also
work when you created the connection through L2CAP etc. If you confuse
your Bluetooth chips with creation and termination of the low level HCI
connection then it is your fault.

> 2> I am using linux kernel 2.6.6 and currently available bluetooth
> debian packages.

Update to at least 2.6.9-mh3 or use 2.6.10-rc2.

Regards

Marcel




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Re: [Bluez-users] bluetooth connection goes down

[Manjunath Prabhu]

hi marcel,
thanx ...this works fine....previously, i was doing it wrong...........


On Wed, 17 Nov 2004 07:42:23 +0100, Marcel Holtmann <marcel@holtmann.org> wrote:
> Hi Manjunath,
> 
> > 1> i am using the hcitool to get the rssi, lq and tpl
> > values........hcitool gives me these values only after a "cc" to my
> > neighbor BT device. Is there some other method to get these values????
> > Also, are there any other performance parameters specific to BT i can
> > measure, like delay??
> 
> the RSSI, link quality and transmit power level commands of hcitool also
> work when you created the connection through L2CAP etc. If you confuse
> your Bluetooth chips with creation and termination of the low level HCI
> connection then it is your fault.
> 
> > 2> I am using linux kernel 2.6.6 and currently available bluetooth
> > debian packages.
> 
> Update to at least 2.6.9-mh3 or use 2.6.10-rc2.
> 
> 
> 
> Regards
> 
> Marcel
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by: InterSystems CACHE
> FREE OODBMS DOWNLOAD - A multidimensional database that combines
> robust object and relational technologies, making it a perfect match
> for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8
> _______________________________________________
> Bluez-users mailing list
> Bluez-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bluez-users/listinfo/bluez-users
>


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