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

[Olivier MARTIN <olivier@xxxxxxxxxxxx>]

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@xxxxxxxxxxxx> 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@xxxxxxxxxxxx> 
> > > 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@xxxxxxxxxxxx> 
> > > > > 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@xxxxxxxxxxxxxxx
> > > > > > More majordomo info at  http://vger.kernel.org/majordomo-info.html

--
To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html