[Bluez-devel] hcidump with multiple dongles

[Bluez-devel] hcidump with multiple dongles

[Williams, Richard]

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Hello,
 
I've been working on a project that requires multiple Bluetooth dongles
on a single PC. I have a USB 2.0 hub with two dongles. I can create my
problem in the following manner:
 
- window 1     l2ping xx:xx:xx:xx:xx:xx  - so this command is running
constantly.
- window 2     hcidump -i hci0               - this command is dumping
the output correctly.
- window 3     hcitool scan -i hci1
- window 4     hcidump -i hci1
 
After a little while ( sometimes immediately ) the hcitool scan in
window 3 will fail:
 
# hcitool scan -i hci1
Scanning...
 
Inquiry failed. Connection timed out.
#
#
 
The test works fine if I do NOT use hcidump. That is, I can run window 1
and 3 all day with no problem. When I add hcidump, the "hcitool scan -i
hci1" will then begin to fail to connect to the hci device.
 
Have you seen this ? Any fixes?
 
thank you.
 
Rich Williams
 

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[Bluez-devel] hcidump with multiple dongles

[Williams, Richard]

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Sorry, I forgot to mention that I'm running 2.6.20-1.2952 Fedora Core 6
with the latest Bluez libs and utils.
thanks,
 
Rich
 
-----------------------------------------------------------------
Hello,
 
I've been working on a project that requires multiple Bluetooth dongles
on a single PC. I have a USB 2.0 hub with two dongles. I can create my
problem in the following manner:
 
- window 1     l2ping xx:xx:xx:xx:xx:xx  - so this command is running
constantly.
- window 2     hcidump -i hci0               - this command is dumping
the output correctly.
- window 3     hcitool scan -i hci1
- window 4     hcidump -i hci1
 
After a little while ( sometimes immediately ) the hcitool scan in
window 3 will fail:
 
# hcitool scan -i hci1
Scanning...
 
Inquiry failed. Connection timed out.
#
#
 
The test works fine if I do NOT use hcidump. That is, I can run window 1
and 3 all day with no problem. When I add hcidump, the "hcitool scan -i
hci1" will then begin to fail to connect to the hci device.
 
Have you seen this ? Any fixes?
 
thank you.
 
Rich Williams
 
 

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Re: [Bluez-devel] hcidump with multiple dongles

[Marcel Holtmann]

Hi Richard,

> I've been working on a project that requires multiple Bluetooth
> dongles on a single PC. I have a USB 2.0 hub with two dongles. I can
> create my problem in the following manner:
>  
> - window 1     l2ping xx:xx:xx:xx:xx:xx  - so this command is running
> constantly.
> - window 2     hcidump -i hci0               - this command is dumping
> the output correctly.
> - window 3     hcitool scan -i hci1

this must be hcitool -i hci1 scan.

> - window 4     hcidump -i hci1
>  
> After a little while ( sometimes immediately ) the hcitool scan in
> window 3 will fail:
>  
> # hcitool scan -i hci1
> Scanning...
>  
> Inquiry failed. Connection timed out.
> #
> #
>  
> The test works fine if I do NOT use hcidump. That is, I can run window
> 1 and 3 all day with no problem. When I add hcidump, the "hcitool scan
> -i hci1" will then begin to fail to connect to the hci device.

Does using "hcitool inq" helps?

Regards

Marcel




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