Re: GATT Server: DBus GATT Services not advertised/exported

[Olivier MARTIN <olivier@labapart.com>]

Thanks Barry, setting 'ControllerMode = le' in /etc/bluetooth/main.conf 
fixed my issue. I can now see the GATT services.

But I guess my adapter now only works as BLE adapter and will ignore the 
non-LE devices.
In the comment of /etc/bluetooth/main.conf it is written the adapter 
should be by default set as 'dual'.

Is it a bug in Bluez? Why GATT services are not exposed while using the 
default value for 'ControllerMode'?


On 14.04.2017 14:30, Barry Byford wrote:
> Hello Olivier,
> 
> 
> On 14 April 2017 at 12:01, Olivier MARTIN <olivier@labapart.com> wrote:
>> You are right Barry, `example-advertisement` seems to work well (I 
>> installed
>> and tried Nordic nRF Connect and I can see the expected advertisemet 
>> data).
> 
> Excellent!
> 
> 
>> But I cannot still manage to get `example-gatt-server` :-(
>> I am sure I got it working last year with an older version of Bluez. 
>> But I
>> cannot make it work with Bluez v5.44.
> 
> OK, I've taken a look at "example-gatt-server" and have it working...
> 
>> 
>> My testing procedure:
>> 
>> 1. [Laptop] First terminal: Start `sudo ./src/bluetoothd -E -n -d`
>> 2. [Laptop] Second terminal: Start unmodified Bluez
>> ./test/example-gatt-server
>> 3. [Laptop] Third terminal: Ensure the adapter is "Powered: yes" and
>> "Discoverable: yes"
> 
> OK, I've done this slightly different (details below). However, the
> first thing I did was edit "/etc/bluetooth/main.conf"
> I added the following line to the end of the file:
> 
> ControllerMode = le
> 
> Then I did the following:
> 1. [SBC1:T1] sudo ./src/bluetoothd -E -n -d
> 2. [SBC1:T2] ./example-gatt-server
> 3. [SBC1:T3] ./example-advertisement
> 
> 
>> 
>> 4. [Android] Connect using Nordic nRF Connect (I also tried with "BLE
>> Scanner") and check I see the exposed GATT services by 
>> `example-gatt-server`
>> Unfortunately, I can only see:
>> - Generic Access Service (0x1800)
>> - Generic Attribute Service (0x1801)
>> 
> 
> I've used bluetoothctl on SBC2 to connect and read the battery values
> that the GATT server is counting down.
> 
> $ bluetoothctl
> [NEW] Controller 00:00:00:00:5A:AD linaro-alip [default]
> [bluetooth]# scan on
> Discovery started
> [CHG] Controller 00:00:00:00:5A:AD Discovering: yes
> [NEW] Device B8:27:EB:22:57:E0 BluezeroLight
> [bluetooth]# scan off
> Discovery stopped
> [CHG] Controller 00:00:00:00:5A:AD Discovering: no
> [bluetooth]# connect B8:27:EB:22:57:E0
> Attempting to connect to B8:27:EB:22:57:E0
> [CHG] Device B8:27:EB:22:57:E0 Connected: yes
> Connection successful
> [...snip...]
> [NEW] Primary Service
> /org/bluez/hci0/dev_B8_27_EB_22_57_E0/service000a
> 0000180f-0000-1000-8000-00805f9b34fb
> Battery Service
> [NEW] Characteristic
> /org/bluez/hci0/dev_B8_27_EB_22_57_E0/service000a/char000b
> 00002a19-0000-1000-8000-00805f9b34fb
> Battery Level
> [...snip...]
> [CHG] Device B8:27:EB:22:57:E0 ServicesResolved: yes
> [BluezeroLight]# select-attribute
> /org/bluez/hci0/dev_B8_27_EB_22_57_E0/service000a/char000b
> [BluezeroLight:/service000a/char000b]# read
> Attempting to read 
> /org/bluez/hci0/dev_B8_27_EB_22_57_E0/service000a/char000b
> [CHG] Attribute
> /org/bluez/hci0/dev_B8_27_EB_22_57_E0/service000a/char000b Value: 0x46
>   46                                               F
> [BluezeroLight:/service000a/char000b]# notify on
> [CHG] Attribute
> /org/bluez/hci0/dev_B8_27_EB_22_57_E0/service000a/char000b Notifying:
> yes
> Notify started
> [CHG] Attribute
> /org/bluez/hci0/dev_B8_27_EB_22_57_E0/service000a/char000b Value: 0x46
> [CHG] Attribute
> /org/bluez/hci0/dev_B8_27_EB_22_57_E0/service000a/char000b Value: 0x44
> [CHG] Attribute
> /org/bluez/hci0/dev_B8_27_EB_22_57_E0/service000a/char000b Value: 0x42
> [CHG] Attribute
> /org/bluez/hci0/dev_B8_27_EB_22_57_E0/service000a/char000b Value: 0x40
> [CHG] Attribute
> /org/bluez/hci0/dev_B8_27_EB_22_57_E0/service000a/char000b Value: 0x3e
> [BluezeroLight:/service000a/char000b]# notify off
> [CHG] Attribute
> /org/bluez/hci0/dev_B8_27_EB_22_57_E0/service000a/char000b Notifying:
> no
> Notify stopped
> 
> 
> That seems to be working then. When I didn't have "ControllerMode =
> le" set then I did see it be unpredictable if it successfully
> connected or not.
> This also worked connecting with the nRF app.
> 
> 
> Does that work for you?
> 
> 
> 
> 
>> If I had to suspect Bluez code, I will guess there is something 
>> missing
>> around here:
>> 
>> bluetoothd[20429]: src/device.c:gatt_server_init() # gatt_server_init
>> bluetoothd[20429]: src/device.c:gatt_debug() Primary services found: 2
>> bluetoothd[20429]: src/device.c:gatt_debug() start: 0x0001, end: 
>> 0x0005,
>> uuid: 00001801-0000-1000-8000-00805f9b34fb
>> bluetoothd[20429]: src/device.c:gatt_debug() start: 0x0014, end: 
>> 0xffff,
>> uuid: 00001800-0000-1000-8000-00805f9b34fb
>> bluetoothd[20429]: src/device.c:gatt_debug() Registered handler for 
>> "Service
>> Changed": 0
>> bluetoothd[20429]: src/device.c:gatt_client_ready_cb() status: 
>> success,
>> error: 0
>> 
>> As Bluez daemon does not get the GATT services from Buez GATT 
>> Database. But
>> it might be me who miss a step...
>> 
>> 
>> On 14.04.2017 12:37, Barry Byford wrote:
>>> 
>>> example-advertisementHello Oliver,
>>> 
>>> 
>>> On 14 April 2017 at 11:03, Olivier MARTIN <olivier@labapart.com> 
>>> wrote:
>>>> 
>>>> Thanks for replying my message Barry,
>>>> 
>>>> Sorry, I forgot to mention but I start Bluez daemon with `sudo
>>>> ./src/bluetoothd -E -n -d` (after stopping the bluetooth service). 
>>>> So I
>>>> already run it with sudo and experimental option.
>>>> 
>>>> I am not sure to understand what you mean by "this kind of error
>>>> message".
>>>> Because I do not see any error message in the log I provided.
>>> 
>>> 
>>> OK, that was bad on my part. I read it as complaining that there were
>>> too many advertisements. Looking again that wasn't what it was say.
>>> Apologies.
>>> 
>>>> 
>>>> Any other idea?
>>> 
>>> 
>>> I am by Linux Single Board Computers (SBC) today so I'm able to run
>>> what you are running and can show you what I'm seeing. I'll focus on
>>> example-advertisement first as example-gatt-server doesn't change the
>>> advertisements.
>>> 
>>> I've started the BlueZ daemon with "./src/bluetoothd -E -n -d"
>>> 
>>> In another shell when I start "./example-advertisement" I see the
>>> following in the output:
>>> 
>>> bluetoothd[2325]: src/adapter.c:property_set_mode() sending Set
>>> Powered command for index 0
>>> bluetoothd[2325]: src/adapter.c:property_set_mode_complete() Success
>>> (0x00)
>>> bluetoothd[2325]: src/adapter.c:new_settings_callback() Settings:
>>> 0x00000ad1
>>> bluetoothd[2325]: src/adapter.c:settings_changed() Changed settings:
>>> 0x00000001
>>> bluetoothd[2325]: src/adapter.c:adapter_start() adapter
>>> /org/bluez/hci0 has been enabled
>>> bluetoothd[2325]: src/adapter.c:trigger_passive_scanning()
>>> bluetoothd[2325]: src/advertising.c:register_advertisement()
>>> RegisterAdvertisement
>>> bluetoothd[2325]: src/advertising.c:client_create() Adding proxy for
>>> /org/bluez/example/advertisement0
>>> bluetoothd[2325]: src/advertising.c:register_advertisement()
>>> Registered advertisement at path /org/bluez/example/advertisement0
>>> bluetoothd[2325]: src/advertising.c:parse_service_uuids() Adding
>>> ServiceUUID: 180D
>>> bluetoothd[2325]: src/advertising.c:parse_service_uuids() Adding
>>> ServiceUUID: 180F
>>> bluetoothd[2325]: src/advertising.c:parse_manufacturer_data() Adding
>>> ManufacturerData for ffff
>>> bluetoothd[2325]: src/advertising.c:parse_service_data() Adding
>>> ServiceData for 9999
>>> bluetoothd[2325]: src/advertising.c:refresh_advertisement() 
>>> Refreshing
>>> advertisement: /org/bluez/example/advertisement0
>>> bluetoothd[2325]: src/advertising.c:add_adv_callback() Advertisement
>>> registered: /org/bluez/example/advertisement0
>>> 
>>> 
>>> On a second SBC, at the command line I run "bluetoothctl" and do 
>>> "scan
>>> on". Once my first SBC is found I do "scan off". I then do "info
>>> B8:27:EB:22:57:E0" (this is the address of the first SBC) which gives
>>> the following output:
>>> 
>>> [bluetooth]# info B8:27:EB:22:57:E0
>>> Device B8:27:EB:22:57:E0
>>> Alias: B8-27-EB-22-57-E0
>>> Paired: no
>>> Trusted: no
>>> Blocked: no
>>> Connected: no
>>> LegacyPairing: no
>>> UUID: Heart Rate                
>>> (0000180d-0000-1000-8000-00805f9b34fb)
>>> UUID: Battery Service           
>>> (0000180f-0000-1000-8000-00805f9b34fb)
>>> ManufacturerData Key: 0xffff
>>> ManufacturerData Value: 0x00
>>> ManufacturerData Value: 0x01
>>> ManufacturerData Value: 0x02
>>> ManufacturerData Value: 0x03
>>> ManufacturerData Value: 0x04
>>> ServiceData Key: 00009999-0000-1000-8000-00805f9b34fb
>>> ServiceData Value: 0x00
>>> ServiceData Value: 0x01
>>> ServiceData Value: 0x02
>>> ServiceData Value: 0x03
>>> ServiceData Value: 0x04
>>> 
>>> 
>>> I've also done a scan from my Android phone (using the Nordic nRF
>>> Connect app) and can see the advertisements also (just hard to share
>>> that information on here).
>>> 
>>> Does that help?
>>> 
>>> 
>>>> 
>>>> 
>>>> On 13.04.2017 19:59, Barry Byford wrote:
>>>>> 
>>>>> 
>>>>> Hello Olivier,
>>>>> 
>>>>> 
>>>>> On 13 April 2017 at 12:14, Olivier MARTIN <olivier@labapart.com> 
>>>>> wrote:
>>>>>> 
>>>>>> 
>>>>>> Hi all,
>>>>>> I am having issue to advertise/export GATT services exposed 
>>>>>> through
>>>>>> DBus
>>>>>> API. I tried `./test/example-gatt-server`. And I also tried to 
>>>>>> merge
>>>>>> `./test/example-advertisement` into `./test/example-gatt-server`. 
>>>>>> But
>>>>>> in
>>>>>> both cases I only see the two compulsory GATT services:
>>>>>> - Generic Access Service (0x1800)
>>>>>> - Generic Attribute Service (0x1801)
>>>>>> 
>>>>>> I am using Bluez v5.44. And I also tried Bluez v5.37.
>>>>>> 
>>>>>> GATT Services seem to be discovered by Bluez (note: I added 
>>>>>> additional
>>>>>> debug
>>>>>> statement all prefixed with '#'):
>>>>>> 
>>>>>> bluetoothd[16877]: src/gatt-database.c:manager_register_app() #
>>>>>> manager_register_app
>>>>>> bluetoothd[16877]: src/gatt-database.c:create_app() # create_app
>>>>>> bluetoothd[16877]: src/gatt-database.c:manager_register_app()
>>>>>> Registering
>>>>>> application: :1.404:/
>>>>>> bluetoothd[16877]: src/advertising.c:register_advertisement()
>>>>>> RegisterAdvertisement
>>>>>> bluetoothd[16877]: src/advertising.c:client_create() Adding proxy 
>>>>>> for
>>>>>> /org/bluez/example/advertisement0
>>>>>> bluetoothd[16877]: src/advertising.c:register_advertisement()
>>>>>> Registered
>>>>>> advertisement at path /org/bluez/example/advertisement0
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service0/char2, iface: 
>>>>>> org.bluez.GattCharacteristic1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service2/char0/desc0, iface:
>>>>>> org.bluez.GattDescriptor1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service2/char2/desc3, iface:
>>>>>> org.bluez.GattDescriptor1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service2/char2, iface: 
>>>>>> org.bluez.GattCharacteristic1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service1/char0, iface: 
>>>>>> org.bluez.GattCharacteristic1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service2/char1, iface: 
>>>>>> org.bluez.GattCharacteristic1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service0/char1, iface: 
>>>>>> org.bluez.GattCharacteristic1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service2/char1/desc3, iface:
>>>>>> org.bluez.GattDescriptor1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service2/char1/desc2, iface:
>>>>>> org.bluez.GattDescriptor1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service0/char0, iface: 
>>>>>> org.bluez.GattCharacteristic1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service2, iface: org.bluez.GattService1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service1, iface: org.bluez.GattService1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service0, iface: org.bluez.GattService1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service2/char0/desc1, iface:
>>>>>> org.bluez.GattDescriptor1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service2/char2/desc2, iface:
>>>>>> org.bluez.GattDescriptor1
>>>>>> bluetoothd[16877]: src/gatt-database.c:proxy_added_cb() Object
>>>>>> received:
>>>>>> /org/bluez/example/service2/char0, iface: 
>>>>>> org.bluez.GattCharacteristic1
>>>>>> bluetoothd[16877]: src/gatt-database.c:client_ready_cb() #
>>>>>> client_ready_cb
>>>>>> bluetoothd[16877]: src/gatt-database.c:create_service() #
>>>>>> create_service
>>>>>> from /org/bluez/example/service2
>>>>>> bluetoothd[16877]: src/gatt-database.c:create_service() #
>>>>>> create_service
>>>>>> from /org/bluez/example/service1
>>>>>> bluetoothd[16877]: src/gatt-database.c:create_service() #
>>>>>> create_service
>>>>>> from /org/bluez/example/service0
>>>>>> bluetoothd[16877]: src/gatt-database.c:database_add_app() #
>>>>>> database_add_app
>>>>>> bluetoothd[16877]: src/gatt-database.c:database_add_service() #
>>>>>> database_add_service
>>>>>> bluetoothd[16877]: src/gatt-database.c:cep_write_cb() Stored CEP 
>>>>>> value
>>>>>> in
>>>>>> the database
>>>>>> bluetoothd[16877]: src/gatt-database.c:database_add_cep() Created 
>>>>>> CEP
>>>>>> entry
>>>>>> for characteristic
>>>>>> bluetoothd[16877]: src/gatt-database.c:cep_write_cb() Stored CEP 
>>>>>> value
>>>>>> in
>>>>>> the database
>>>>>> bluetoothd[16877]: src/gatt-database.c:database_add_cep() Created 
>>>>>> CEP
>>>>>> entry
>>>>>> for characteristic
>>>>>> bluetoothd[16877]: src/gatt-database.c:cep_write_cb() Stored CEP 
>>>>>> value
>>>>>> in
>>>>>> the database
>>>>>> bluetoothd[16877]: src/gatt-database.c:database_add_cep() Created 
>>>>>> CEP
>>>>>> entry
>>>>>> for characteristic
>>>>>> bluetoothd[16877]: src/gatt-database.c:gatt_db_service_added() #
>>>>>> gatt_db_service_added: GATT Service added to local database
>>>>>> bluetoothd[16877]: src/gatt-database.c:database_add_service() #
>>>>>> database_add_service
>>>>>> bluetoothd[16877]: src/gatt-database.c:database_add_ccc() Created 
>>>>>> CCC
>>>>>> entry
>>>>>> for characteristic
>>>>>> bluetoothd[16877]: src/gatt-database.c:gatt_db_service_added() #
>>>>>> gatt_db_service_added: GATT Service added to local database
>>>>>> bluetoothd[16877]: src/gatt-database.c:database_add_service() #
>>>>>> database_add_service
>>>>>> bluetoothd[16877]: src/gatt-database.c:database_add_ccc() Created 
>>>>>> CCC
>>>>>> entry
>>>>>> for characteristic
>>>>>> bluetoothd[16877]: src/gatt-database.c:gatt_db_service_added() #
>>>>>> gatt_db_service_added: GATT Service added to local database
>>>>>> bluetoothd[16877]: src/gatt-database.c:client_ready_cb() GATT
>>>>>> application
>>>>>> registered: :1.404:/
>>>>>> bluetoothd[16877]: src/advertising.c:parse_service_uuids() Adding
>>>>>> ServiceUUID: 180D
>>>>>> bluetoothd[16877]: src/advertising.c:parse_service_uuids() Adding
>>>>>> ServiceUUID: 180F
>>>>>> bluetoothd[16877]: src/advertising.c:parse_manufacturer_data() 
>>>>>> Adding
>>>>>> ManufacturerData for ffff
>>>>>> bluetoothd[16877]: src/advertising.c:parse_service_data() Adding
>>>>>> ServiceData
>>>>>> for 9999
>>>>>> bluetoothd[16877]: src/advertising.c:refresh_advertisement() 
>>>>>> Refreshing
>>>>>> advertisement: /org/bluez/example/advertisement0
>>>>>> bluetoothd[16877]: src/advertising.c:add_adv_callback() 
>>>>>> Advertisement
>>>>>> registered: /org/bluez/example/advertisement0
>>>>>> 
>>>>>> I start `./test/example-gatt-server` as a normal user. But Bluez 
>>>>>> does
>>>>>> not
>>>>>> seem to have any permission issue with it.
>>>>> 
>>>>> 
>>>>> 
>>>>> Building from source I've seen something similar if I've used sudo 
>>>>> for
>>>>> the
>>>>> make.
>>>>> 
>>>>> To compile and install I use sudo for the install only:
>>>>> 
>>>>> make -j 4 && sudo make install
>>>>> 
>>>>> 
>>>>> 
>>>>>> 
>>>>>> I am using 'BLE scanner' on Android to discover the GATT services. 
>>>>>> But
>>>>>> I
>>>>>> think the problem is coming from Bluez. When I connect the Android
>>>>>> device
>>>>>> to
>>>>>> Bluez, I can see this log:
>>>>>> 
>>>>>> bluetoothd[16877]: src/adapter.c:connected_callback() hci0 device
>>>>>> 98:D6:F7:31:7B:0D connected eir_len 14
>>>>>> bluetoothd[16877]: src/gatt-database.c:connect_cb() New incoming 
>>>>>> BR/EDR
>>>>>> ATT
>>>>>> connection
>>>>>> bluetoothd[16877]: attrib/gattrib.c:g_attrib_ref() 0x98cd908:
>>>>>> g_attrib_ref=1
>>>>>> bluetoothd[16877]: src/device.c:load_gatt_db() # load_gatt_db:
>>>>>> Restoring
>>>>>> 98:D6:F7:31:7B:0D gatt database from file
>>>>>> '/var/lib/bluetooth/5C:F3:70:6A:D9:3C/cache/98:D6:F7:31:7B:0D'
>>>>>> bluetoothd[16877]: src/device.c:load_gatt_db_impl() # 
>>>>>> load_gatt_db_impl
>>>>>> bluetoothd[16877]: src/device.c:load_service() # load_service: 
>>>>>> loading
>>>>>> service: 0x0001, end: 0x0005, uuid:
>>>>>> 00001801-0000-1000-8000-00805f9b34fb
>>>>>> bluetoothd[16877]: src/device.c:load_service() # load_service: 
>>>>>> loading
>>>>>> service: 0x0014, end: 0xffff, uuid:
>>>>>> 00001800-0000-1000-8000-00805f9b34fb
>>>>>> bluetoothd[16877]: src/device.c:load_chrc() loading characteristic
>>>>>> handle:
>>>>>> 0x0002, value handle: 0x0003, properties 0x0020 uuid:
>>>>>> 00002a05-0000-1000-8000-00805f9b34fb
>>>>>> bluetoothd[16877]: src/device.c:load_chrc() loading characteristic
>>>>>> handle:
>>>>>> 0x0015, value handle: 0x0016, properties 0x0002 uuid:
>>>>>> 00002a00-0000-1000-8000-00805f9b34fb
>>>>>> bluetoothd[16877]: src/device.c:load_chrc() loading characteristic
>>>>>> handle:
>>>>>> 0x0017, value handle: 0x0018, properties 0x0002 uuid:
>>>>>> 00002a01-0000-1000-8000-00805f9b34fb
>>>>>> bluetoothd[16877]: src/device.c:load_gatt_db() List GATT Primaries
>>>>>> before
>>>>>> being free:
>>>>>> bluetoothd[16877]: src/device.c:print_primary() - Primary UUID:
>>>>>> 00001801-0000-1000-8000-00805f9b34fb
>>>>>> bluetoothd[16877]: src/device.c:print_primary() - Primary UUID:
>>>>>> 00001800-0000-1000-8000-00805f9b34fb
>>>>>> bluetoothd[16877]: src/device.c:add_primary() # add_primary
>>>>>> bluetoothd[16877]: src/device.c:add_primary() # add_primary
>>>>>> bluetoothd[16877]: profiles/gap/gas.c:gap_accept() GAP profile 
>>>>>> accept
>>>>>> (98:D6:F7:31:7B:0D)
>>>>>> bluetoothd[16877]: src/service.c:change_state() 0x98c98e0: device
>>>>>> 98:D6:F7:31:7B:0D profile gap-profile state changed: disconnected 
>>>>>> ->
>>>>>> connected (0)
>>>>>> bluetoothd[16877]: src/gatt-client.c:btd_gatt_client_connected() 
>>>>>> Device
>>>>>> connected.
>>>>>> bluetoothd[16877]: src/device.c:gatt_server_init() # 
>>>>>> gatt_server_init
>>>>>> bluetoothd[16877]: src/device.c:gatt_debug() Primary services 
>>>>>> found: 2
>>>>>> bluetoothd[16877]: src/device.c:gatt_debug() start: 0x0001, end:
>>>>>> 0x0005,
>>>>>> uuid: 00001801-0000-1000-8000-00805f9b34fb
>>>>>> bluetoothd[16877]: src/device.c:gatt_debug() start: 0x0014, end:
>>>>>> 0xffff,
>>>>>> uuid: 00001800-0000-1000-8000-00805f9b34fb
>>>>>> bluetoothd[16877]: src/device.c:gatt_debug() Registered handler 
>>>>>> for
>>>>>> "Service
>>>>>> Changed": 0
>>>>>> bluetoothd[16877]: src/device.c:gatt_client_ready_cb() status: 
>>>>>> success,
>>>>>> error: 0
>>>>>> bluetoothd[16877]: src/device.c:register_gatt_services() #
>>>>>> register_gatt_services
>>>>>> bluetoothd[16877]: src/device.c:add_primary() # add_primary
>>>>>> bluetoothd[16877]: src/device.c:add_primary() # add_primary
>>>>>> bluetoothd[16877]: src/device.c:add_gatt_service() # 
>>>>>> add_gatt_service:
>>>>>> UUID:00001801-0000-1000-8000-00805f9b34fb
>>>>>> bluetoothd[16877]: src/gatt-client.c:btd_gatt_client_ready() GATT
>>>>>> client
>>>>>> ready
>>>>>> bluetoothd[16877]: src/gatt-client.c:create_services() Exporting
>>>>>> objects
>>>>>> for
>>>>>> GATT services: 98:D6:F7:31:7B:0D
>>>>>> bluetoothd[16877]: src/gatt-client.c:service_create() Exported 
>>>>>> GATT
>>>>>> service:
>>>>>> /org/bluez/hci0/dev_98_D6_F7_31_7B_0D/service0001
>>>>>> bluetoothd[16877]: src/gatt-client.c:characteristic_create() 
>>>>>> Exported
>>>>>> GATT
>>>>>> characteristic:
>>>>>> /org/bluez/hci0/dev_98_D6_F7_31_7B_0D/service0001/char0002
>>>>>> bluetoothd[16877]: src/device.c:device_svc_resolved()
>>>>>> /org/bluez/hci0/dev_98_D6_F7_31_7B_0D err 0
>>>>>> bluetoothd[16877]: src/device.c:store_gatt_db() # store_gatt_db
>>>>>> bluetoothd[16877]: src/device.c:store_service() # store_service
>>>>>> bluetoothd[16877]: src/device.c:store_service() # store_service
>>>>>> bluetoothd[16877]: profiles/gap/gas.c:read_device_name_cb() GAP 
>>>>>> Device
>>>>>> Name:
>>>>>> Nexus 4
>>>>>> bluetoothd[16877]: profiles/gap/gas.c:read_appearance_cb() GAP
>>>>>> Appearance:
>>>>>> 0x0000
>>>>>> 
>>>>>> I also reduced DBus 'TestAdvertisement' interface to only expose 
>>>>>> one
>>>>>> GATT
>>>>>> Service as many BLE adapter got a limitation in the size of the
>>>>>> advertisement packet:
>>>>>> class TestAdvertisement(Advertisement):
>>>>>> 
>>>>>>     def __init__(self, bus, index):
>>>>>>         Advertisement.__init__(self, bus, index, 'peripheral')
>>>>>>         #self.add_service_uuid('180D') # HeartRate
>>>>>>         self.add_service_uuid('180F') # Battery
>>>>>>         #self.add_manufacturer_data(0xffff, [0x00, 0x01, 0x02, 
>>>>>> 0x03,
>>>>>> 0x04])
>>>>>>         #self.add_service_data('9999', [0x00, 0x01, 0x02, 0x03, 
>>>>>> 0x04])
>>>>>>         self.include_tx_power = True
>>>>>> 
>>>>>> My concern is mainly these lines:
>>>>>> 
>>>>>> bluetoothd[16877]: src/device.c:gatt_debug() Primary services 
>>>>>> found: 2
>>>>>> bluetoothd[16877]: src/device.c:gatt_debug() start: 0x0001, end:
>>>>>> 0x0005,
>>>>>> uuid: 00001801-0000-1000-8000-00805f9b34fb
>>>>>> bluetoothd[16877]: src/device.c:gatt_debug() start: 0x0014, end:
>>>>>> 0xffff,
>>>>>> uuid: 00001800-0000-1000-8000-00805f9b34fb
>>>>>> 
>>>>> 
>>>>> I've seen this kind of error message when I've had a failure of a
>>>>> previous script and the Bluetooth daemon is in some unknown state. 
>>>>> At
>>>>> this point it is worth restarting the bluetooth service with:
>>>>>   sudo service bluetooth restart
>>>>> 
>>>>> You will see in the advertising DBus API documentation that it is
>>>>> still in experimental mode in 5.44.
>>>>> 
>>>>> 
>>>>> https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/doc/advertising-api.txt#n78
>>>>> 
>>>>> This means that you need to make sure bluetoothd is started in
>>>>> experimental mode. Have you done this?
>>>>>  You can check with "sudo service bluetooth status"
>>>>> 
>>>>> Experimental can be switched on by default in the bluetooth.service 
>>>>> file
>>>>> 
>>>>> Edit /lib/systemd/system/bluetooth.service file to add 
>>>>> --experimental
>>>>> flag
>>>>> e.g:
>>>>> 
>>>>> sudo sed -i '/^ExecStart.*bluetoothd\s*$/ s/$/ --experimental/'
>>>>> /lib/systemd/system/bluetooth.service
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>>> I have not found the code that export GATT Services from GATT 
>>>>>> Database
>>>>>> to
>>>>>> the BLE central.
>>>>>> 
>>>>>> From my search on Internet, it looks I am not the only one who is
>>>>>> having
>>>>>> this issue
>>>>>> I am happy to share/test anything that could help to make some
>>>>>> progress.
>>>>>> 
>>>>>> Thanks,
>>>>>> Olivier
>>>>>> --
>>>>>> To unsubscribe from this list: send the line "unsubscribe
>>>>>> linux-bluetooth"
>>>>>> in
>>>>>> the body of a message to majordomo@vger.kernel.org
>>>>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>> 
>>>> 
>>>> 
>>