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Date: Mon, 3 Nov 2014 11:32:42 -0800
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Subject: Re: How to get started on a GATT Server ?
From: Arman Uguray <armansito@chromium.org>
To: "Urbani, Edmund" <edmund.urbani@lilandit.com>
Cc: "linux-bluetooth@vger.kernel.org" <linux-bluetooth@vger.kernel.org>
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Sender: linux-bluetooth-owner@vger.kernel.org
List-ID: <linux-bluetooth.vger.kernel.org>

Hi Edmund,

> On Mon, Nov 3, 2014 at 7:38 AM, Urbani, Edmund <edmund.urbani@lilandit.com> wrote:
> Hello all,
>
> I am trying to write a simple GATT-based service of my own. Right now I
> don't really know which docs I should be looking at. I have skimmed through
> bluez sources (5.23) and found gatt-service.h and gatt.h, as well as the
> gatt-example plugin.
>
> So far I am still trying to figure out whether I should be going the C API
> route or maybe use the D-Bus interface. Also gatt-service.c seems to suggest
> that there is a way to register a GATT service over D-Bus but running it
> gives me this:
> RegisterService: Method "RegisterService" with signature "oa{sv}" on
> interface "org.bluez.GattManager1" doesn't exist"

The reason you're not seeing GattManager1 is because it's hidden
behind the "experimental" flag. So you need to configure and run bluez
with the --enable-experimental and the --experimental flags
respectively.

That said, that API implementation isn't complete and isn't in fact
even wired up with the internal attrib-server. We're working towards
rewriting all of the C API and finally implementing the proposed D-Bus
API but until then, I would ignore doc/gatt-api.txt (it's only a
proposal at the moment and isn't even included in release tarballs).
So for now you have to use the C API route. There will probably be an
announcement once that D-Bus API is finally supported.

>
> Any pointers to help me get started would be appreciated. Thanks!
>
> Kind regards,
>   Edmund
>
> --
>
> Mit freundlichen Grüßen
> Edmund Urbani
> Liland IT Team
>
> Email: Edmund.Urbani@Lilandit.com <mailto:Edmund.Urbani@lilandit.com>
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Cheers,
Arman