bluetooth troubleshooting

[Daniel O'Connor]

On Sat, 2 May 2009, Dominic Fandrey wrote:
> # hccontrol -n ubt0hci inquiry
> Inquiry complete. Status: No error [00]
>
> is pretty lame compared to what should appear according to the
> handbook:
>
> % hccontrol -n ubt0hci inquiry
> Inquiry result, num_responses=1
> Inquiry result #0
>        BD_ADDR: 00:80:37:29:19:a4
>        Page Scan Rep. Mode: 0x1
>        Page Scan Period Mode: 00
>        Page Scan Mode: 00
>        Class: 52:02:04
>        Clock offset: 0x78ef
> Inquiry complete. Status: No error [00]

Depends what's in range.

Your command indicates to me that there are no _discoverable_ BT modules 
in range. (Note the discoverable part :)

BTW the '-n ubt0hci' is optional if you only have one BT controller.

If it isn't discoverable you can do something like..
sdpcontrol -a pda browse

(I entered pda into /etc/bluetooth/hosts).

If it doesn't show anything (like my phone) you need to bruteforce 
search for services (I don't understand the rationale of that but 
that's the way it is), eg..
sh -c 'for i in \
	CIP CTP DUN FAX FTRN GN HID HSET LAN NAP OPUSH SP; do \
	sdpcontrol -a pda  search $i; done'

There's a command in Bluez which does this for you but the above would 
tell you a reasonable amount.

-- 
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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