Re: [Bluez-users] using bluez dbus interface exposed from hcid with plain c code

["Fritz Code" <codefritz@googlemail.com>]

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Hi Marcel,

is there anywhere a HowTo / Tutorial how to use the low-level C API of bluez
through dbus?

I've found a Tutorial for using the low-level C API of dbus here
(unfortunately just a ver basic Tut.)
http://dbus.freedesktop.org/doc/dbus/libdbus-tutorial.html

But I didn't find anything about the characteristics of the Adapter
Interface of bluez (hcid) if its used from low-level API.
E.g. the method names which I have to pass the method
dbus_message_new_method_call() ...

thanks,
Fritz

On Sat, May 17, 2008 at 4:47 PM, Marcel Holtmann <marcel@holtmann.org>
wrote:

> Hi Fritz,
>
> > since I don't have resources for Glib or another abstraction layer
> > on my Embedded Linux I can only use plain C for communication with
> > bluez through dbus.
> > But so far I've only find howto's with GLib or Qt etc.
> > Are there any documents that describe my case (plain c
> > communication) ?
> >
> > For general understanding of the bluez architecture and tools, a
> > statement and a question:
> >
> > hcid is the daemon which exposes different Interfaces through dbus,
> > e.g. the Interface "Adapter".
> > Another Application can access bluez functionalities through dbus by
> > using the Interfaces exposed from hcid. (hopefully also by using
> > plain C).
> >
> > E.g.: You want to develop an application "example-app" which should
> > list available local buetooth devices, remote devices and its
> > services.
> > In this case it is enough to start hcid and use its Interface
> > "Adapter" from "example-app" ?
> >
> > The other tools like, hcitool, hciconfig etc. are not necessary,
> > they are own applications, right.
> > In order to use bluez features from another application (through
> > dbus) the only tool/util needed is hcid?
> > And this is configured by hcid.conf?
>
> if you use bluez-utils-3.31 or any later release, the only thing you
> need is hcid. It will do everything for you. The only exception is if
> your adapter is connected via an UART and using hci_uart driver, then
> you also need hciattach, but that is it.
>
> And of course you can write a client application using D-Bus low-level
> (libdbus) only. It is a little bit more work than using high level
> languages, but it is possible. I still have plans to provide a D-Bus
> only replacement for hciconfig, hcitool etc.
>
> Regards
>
> Marcel
>
>
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-- 
Regards,
--Codefritz

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