Re: [Bluez-devel] Re: [Patch] Some btsco modifications

[Lars Grunewaldt <lgw@dark-reality.de>]

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Fredrik Tolf wrote:
| On Wed, 2005-03-16 at 13:30 +0100, Lars Grunewaldt wrote:
|
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|>Fredrik Tolf wrote:
|>| On Tue, 2005-03-15 at 17:17 -0700, Brad Midgley wrote:
|>| In a perfect world, yes. But the question is: Does the kernel actually
|>| detect wandering out of range, and if so, after how long? If the kernel
|>| can't detect it, is there a way of periodically pinging the headset to
|>| detect it manually?
|>
|>Of course the kernel detects it when a device get's out of range. Not
|>immediatly, but as soon as the lower level BT links break down. Pretty
|>much a protocol feature...
|
|
| Well, I have to admit that I don't really know much about how BT works.
| I just got into the btsco project because I wanted to integrate it
| closer with Gnomemeeting and other VoIP programs, as can be seen from
| the fact that the features I've contributed are pretty
| non-bluetooth-related.
|
| Thanks for enlightening me, though. I would have thought that when the
| device got out of range, the kernel just wouldn't know the status of it
| since it couldn't reach it (and maybe time out after a longer period of
| time). Does anyone have any pointers to good documentation that I can
| use to read up on BT?

As Brad already wrote, dig bluetooth.org. The whole BT thing is set up
as a standard (sort of), from hardware up to the software/driver level.
You can find everything (i.e. AT commands) in the core docs. Maybe you
have to check the older BT specs (1.1) for the headset profile and
especially the sco stuff. And make sure to understand what the different
transport layers do, it helps a lot.

good luck :)
- - Lars

- --
Lars Grunewaldt
* software development
* multimedia design
skills: C/C++/Java/PHP/(X)HTML/Flash/audio/video
web: http://www.dark-reality.de
mail: lgw@dark-reality.de
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