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From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
Date: Fri, 19 May 2017 15:46:17 +0300
Message-ID: <CABBYNZ+R7dV5i+BQowigf5eddB4yxSki+xLeLFYBrN4Sfe8mJA@mail.gmail.com>
Subject: Re: How to use GattProfile1
To: Krasi Georgiev <krasi.root@gmail.com>
Cc: Barry Byford <31baz66@gmail.com>,
        Bluez mailing list <linux-bluetooth@vger.kernel.org>
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Hi,


On Thu, May 18, 2017 at 8:00 PM, Krasi Georgiev <krasi.root@gmail.com> wrot=
e:
> Thanks
>
> I watched this video 3 times, but he talks about profile registration and=
 the auto connect very briefly so I tried everything that comes to mind, bu=
t can=E2=80=99t make it to work
>
> If you have done it can you post some pseudo code for the code execution =
?
>
> I am sure it is not very complicated , just still too new to the whole co=
ncept.

So what is the role you want the system to assume?

As central:

bluetoothctl> scan on
*** Wait for the device you want to connect to show up ***
bluetoothctl> connect <address>
bluetoothctl> select-attribute <path or uuid>

For peripheral:

GATT application is not supported yet by bluetoothctl, but I have some
plans to include support for it at some point (patch are of course
welcome), in case you are looking for a C example you can find it
here:

https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/tools/gatt-service.=
c

tools/gatt-service:

gatt-service unique name: :1.152
Registered service: /service1
Get Primary: True
Get UUID: 00001802-0000-1000-8000-00805f9b34fb
Exist Includes: 00001802-0000-1000-8000-00805f9b34fb
Characteristic(00002a06-0000-1000-8000-00805f9b34fb): Get("Value")
Descriptor(8260c653-1a54-426b-9e36-e84c238bc669): Get("Value")
Get Primary: True
Get UUID: 00001802-0000-1000-8000-00805f9b34fb
Exist Includes: 00001802-0000-1000-8000-00805f9b34fb
Characteristic(00002a06-0000-1000-8000-00805f9b34fb): Get("Value")
Descriptor(8260c653-1a54-426b-9e36-e84c238bc669): Get("Value")
Get Primary: True
Get UUID: 00001802-0000-1000-8000-00805f9b34fb
Exist Includes: 00001802-0000-1000-8000-00805f9b34fb
Characteristic(00002a06-0000-1000-8000-00805f9b34fb): Get("Value")
Descriptor(8260c653-1a54-426b-9e36-e84c238bc669): Get("Value")
RegisterApplication: OK
RegisterApplication: OK

bluetoothctl> advertise on

>
>> On 18 May 2017, at 18:41, Barry Byford <31baz66@gmail.com> wrote:
>>
>> Szymon Janc talks through using BlueZ for BLE on this video:
>> https://youtu.be/VMDyebKT5c4
>> Slides at:
>> http://events.linuxfoundation.org/sites/events/files/slides/Doing%20Blue=
tooth%20Low%20Energy%20on%20Linux.pdf
>>
>> Should be helpful for you to understand the logic.
>>
>>
>> On 17 May 2017 at 11:35, Krasi Georgiev <krasi.root@gmail.com> wrote:
>>> 3 hours later and still no luck :(
>>>
>>> I am reading all api documents over and over again and can=E2=80=99t un=
derstand the logic.
>>>
>>> I think I need to register an object that implements the org.bluez.Gatt=
Profile1 interface, but what should be the bus name and object path for thi=
s object I am completely unsure...
>>>
>>> Desperate for any useful info so thanks in advance :)
>>>
>>>> On 16 May 2017, at 23:31, Krasi Georgiev <krasi.root@gmail.com> wrote:
>>>>
>>>> Thanks
>>>> I already looked at these, but they don=E2=80=99t cover what I need an=
d also a but high level with the dbus python package which hides most of th=
e important details.
>>>>
>>>> Anyway I think I got a better idea now. I think I need to register the=
   org.bluez.GattProfile1 interface in the dbus and then call org.bluez.Pro=
fileManager1.RegisterProfile , will test it tomorrow and hopefully I will g=
et it going.
>>>>
>>>>
>>>>> On 16 May 2017, at 22:08, Barry Byford <31baz66@gmail.com> wrote:
>>>>>
>>>>> Hello Krasi,
>>>>>
>>>>>
>>>>> On 16 May 2017 at 12:42, Krasi Georgiev <krasi.root@gmail.com> wrote:
>>>>>> Hi all
>>>>>>
>>>>>> Can you give me a quick example with a pseudo code (or using qdbus) =
for  workflow steps how to setup an
>>>>>> auto connect to a device that supports given UUID service (0000180f-=
0000-1000-8000-00805f9b34fb - Battery Service)
>>>>>
>>>>> The examples for BlueZ are in the test directory. The ones you might
>>>>> find useful are:
>>>>> https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/test/test-dis=
covery
>>>>> https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/test/example-=
gatt-client
>>>>>
>>>>>
>>>>>
>>>>>>
>>>>>> From what I understand all I need to do is send a call to the sytemb=
us to register the hci0 adapter to auto connect
>>>>>>
>>>>>> org.bluez.ProfileManager1.RegisterProfile , /org/bluez/Test (ObjPath=
), "00001802-0000-1000-8000-00805f9b34fb=E2=80=9D (service UUID)
>>>>>>
>>>>>> and if the discovery finds a device with such service it should auto=
 connect right ?
>>>>>>
>>>>>>
>>>>>> I am not sure what is the ObjPath parameter for and when i introspec=
t I don=E2=80=99t even see the /org/bluez/GattProfile1
>>>>>>
>>>>>> I am using bluez Version 5.45 on a Raspberry Pi zero
>>>>>> Linux 4.4.50+   armv6l
>>>>>>
>>>>>>
>>>>>> I tried making the call using with gdbus, but couldn=E2=80=99t figur=
e out how to structure the  osa{sv} paramters
>>>>>> also tried dbus-send , but the tool doesn=E2=80=99t seem to support =
this structures (no nesting)
>>>>>>
>>>>>>
>>>>>> I am using golang godbus bindings and the call gets executed without=
 an error , but the bluetooth adapter doesn=E2=80=99t auto connect
>>>>>>
>>>>>>
>>>>>> here is the gist
>>>>>> https://gist.githubusercontent.com/krasi-georgiev/56f88cd18893578fa8=
3c328f038479d6/raw/25f11f2fd7b55d82590732fa8f253febda623645/main.go
>>>>>>
>>>>>> go get github.com/godbus/dbus
>>>>>> wget https://gist.githubusercontent.com/krasi-georgiev/56f88cd188935=
78fa83c328f038479d6/raw/25f11f2fd7b55d82590732fa8f253febda623645/main.go
>>>>>> go run main.go
>>>>>>
>>>>>>
>>>>>> I would really appreciate some useful info.
>>>>>> Thanks--
>>>>>> To unsubscribe from this list: send the line "unsubscribe linux-blue=
tooth" in
>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>>
>>>
>>> --
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>
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--=20
Luiz Augusto von Dentz