I have tested the D-Link DBT-122 dongle (BCM2035 chipset) with BlueZ-utils
and I find the following features:
# hciconfig hci0 features
hci0: Type: USB
BD Address: 00:13:46:01:22:90 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>
Looking the manufactured specification page of BCM2035 chipset it says that
it implements the Bluetooth v1.2 specification. Nevertheless I found that
it's not true, because this dongle doesn't support the <Inquiry with RSSI>
feature, that belongs to that version and following.
I have also tested other usb dongles, for example CSR BlueCore4,
successfully with this feature:
# hciconfig hci0 features
hci0: Type: USB
BD Address: 00:80:5A:46:2D:51 ACL MTU: 384:8 SCO MTU: 64:8
Features: 0xff 0xff 0x8f 0xfe 0x9b 0xf9 0x00 0x80
<3-slot packets> <5-slot packets> <encryption> <slot offset>
<timing accuracy> <role switch> <hold mode> <sniff mode>
<park state> <RSSI> <channel quality> <SCO link> <HV2
packets>
<HV3 packets> <u-law log> <A-law log> <CVSD> <paging scheme>
<power control> <transparent SCO> <broadcast encrypt>
<EDR ACL 2 Mbps> <EDR ACL 3 Mbps> <enhanced iscan>
<interlaced iscan> <interlaced pscan> <inquiry with RSSI>
<------------------
<extended SCO> <EV4 packets> <EV5 packets> <AFH cap. slave>
<AFH class. slave> <3-slot EDR ACL> <5-slot EDR ACL>
<AFH cap. master> <AFH class. master> <EDR eSCO 2 Mbps>
<EDR eSCO 3 Mbps> <3-slot EDR eSCO> <extended features>
Please, could you confirm me that it's impossible to make an "Inquiry with
RSSI" operation with the BCM2035 chipset from Broadcom ?
Do you know on existence of an firmware upgrade for this chipsets that
solves this lack ?
I have asked the same question on D-Link support page without response.
I use Ubuntu Dapper with Kernel v2.6.15 and BlueZ-utils v2.25.
Thanks for your attention.
Best regards.