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
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