Hi,
I am developing an application for automatic network discovery using bluetooth
i.e. Running the application will result in connections to any other computers
running the same application:
- Each application is running a server which accepts connections (once a
connection is made, the connection is maintained until a transmission
error occcurs or the socket is closed by either party);
- and a client which repeatedly queries for bluetooth devices to connect to.
So in total an application makes and
maintains 2*(#other applications) connections.
This causes no problems when using the Belkin F8T003 Bluetooth USB Adaptor
(this is a bluetooth v1.1 compliant device).
However, when using the Belkin F8T009 Bluetooth USB Adaptor
(this is a bluetooth v1.2 compliant device)
"Device or Resource Busy" errors are observed
when the application tries to query
when there are 3 or more connections maintained by it.
Is this a bluetooth hardware issue,
a Bluez stack issue,
or does Bluez just not support this particular device??
I have installed all the latest versions:
- Bluez-lib
- Bluez-hcidump
I am running Fedora core 4 with the latest available updates of the kernel.
I've used hcidump to try and figure it out, but all it tells me is:
HCI Command: Inquiry (0x01|0x0001) plen 5
lap 0x9e8b33 len 8 num 255
HCI Event: Command Status (0x0f) plen 4
Inquiry (0x01|0x0001) status 0x0c ncmd 1
Error: Command Disallowed
This really doesn't help me to understand why this is happening.
The status of that particular bluetooth device (a Belkin F8T003 Bluetooth USB
bluetooth v1.1 compliant Adaptor) when the error occurs is as follows:
a local server socket is listening for connections
two remote clients are connected to the device
a local client thread is attempting to query other devices using hci_inquiry
Please advise if I am overlooking something, or if this is not a Bluez issue,
could you please direct me to the appropriate contact.
Thanks,
Heba
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Hi Heba,
> I am developing an application for automatic network discovery using bluetooth
> i.e. Running the application will result in connections to any other computers
> running the same application:
> - Each application is running a server which accepts connections (once a
> connection is made, the connection is maintained until a transmission
> error occcurs or the socket is closed by either party);
> - and a client which repeatedly queries for bluetooth devices to connect to.
>
> So in total an application makes and
> maintains 2*(#other applications) connections.
>
> This causes no problems when using the Belkin F8T003 Bluetooth USB Adaptor
> (this is a bluetooth v1.1 compliant device).
>
> However, when using the Belkin F8T009 Bluetooth USB Adaptor
> (this is a bluetooth v1.2 compliant device)
> "Device or Resource Busy" errors are observed
> when the application tries to query
> when there are 3 or more connections maintained by it.
>
> Is this a bluetooth hardware issue,
> a Bluez stack issue,
> or does Bluez just not support this particular device??
>
> I have installed all the latest versions:
> - Bluez-lib
> - Bluez-hcidump
> I am running Fedora core 4 with the latest available updates of the kernel.
>
> I've used hcidump to try and figure it out, but all it tells me is:
> HCI Command: Inquiry (0x01|0x0001) plen 5
> lap 0x9e8b33 len 8 num 255
> HCI Event: Command Status (0x0f) plen 4
> Inquiry (0x01|0x0001) status 0x0c ncmd 1
> Error: Command Disallowed
>
> This really doesn't help me to understand why this is happening.
> The status of that particular bluetooth device (a Belkin F8T003 Bluetooth USB
> bluetooth v1.1 compliant Adaptor) when the error occurs is as follows:
> a local server socket is listening for connections
> two remote clients are connected to the device
> a local client thread is attempting to query other devices using hci_inquiry
>
> Please advise if I am overlooking something, or if this is not a Bluez issue,
> could you please direct me to the appropriate contact.
send in the "hciconfig -a" output for both devices.
Regards
Marcel
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