Re: [Bluez-users] Link Quality between 2 Bluetooth USB Dongles

[Arpit Rai <whalesurf@gmail.com>]

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Hi Marcel
 these chips are Broadcom based. So you must ask them how they
implemented the link quality value.
How is the implementation vendor specific?Does it mean that some vendors
don't support Link Quality?Or does it mean that there are other ways of
getting the LQ value?
 Check "hciconfig hci0 features" if they support "Inquiry with RSSI".
[root@175-214 ~]# hciconfig hci0 features
hci0: Type: USB
BD Address: 00:10:60:B3:2C:F7 ACL MTU: 377:10 SCO MTU: 16:0
Features: 0xff 0xfe 0x0d 0x38 0x08 0x08 0x00 0x00
<3-slot packets> <5-slot packets> <encryption> <slot offset>
<timing accuracy> <role switch> <hold mode> <sniff mode>
<RSSI> <channel quality> <SCO link> <HV2 packets>
<HV3 packets> <u-law log> <A-law log> <CVSD> <power control>
<transparent SCO> <enhanced iscan> <interlaced iscan>
<interlaced pscan> <AFH cap. slave> <AFH cap. master>
 Well looks like it does support RSSI...but RSSI values change abruptly..for
the same distance the RSSI might be -9 and the after ten seconds its -2 so I
can't use RSSI.
 Do you suggest I try the LQ value with some other bluetooth adaptors?Any
idea as to which model would support the link quality feature?
 Regards
Arpit

 On 10/25/05, Marcel Holtmann <marcel@holtmann.org> wrote:
>
> Hi Arpit,
>
> > [root@174-242 ~]# hciconfig hci0 version
> > hci0: Type: USB
> > BD Address: 00:10:60:B3:2C:F7 ACL MTU: 377:10 SCO MTU: 16:0
> > HCI Ver: 1.2 (0x2) HCI Rev: 0x0 LMP Ver: 1.2 (0x2) LMP Subver:
> > 0x309
> > Manufacturer: Broadcom Corporation (15)
>
> these chips are Broadcom based. So you must ask them how they
> implemented the link quality value.
>
> Check "hciconfig hci0 features" if they support "Inquiry with RSSI".
>
> > What is the HCI build version in this case?And how does this help me?
>
> The build id is only valid for CSR chips. It is not fully clear how
> Broadcom encodes this.
>
> Regards
>
> Marcel
>
>
>
>
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