Hi,
I am doing some experiments to understand Bluez DBUS API using Bluez
5.46, and feel a little bit confused about Gatt Dbus example code and
bluetoothctl.
First, I do sudo bluetoothd --experimental -d, then I create two
virtual bt interfaces and bring up example-gatt-server, then
example-gatt-client cannot find any new gatt service. Any idea?
Also, I have checked all information under org.bluez using d-feet, the
gatt service and characteristics from example-gatt-client have not yet
been added. I print all infos under ObjectManager for bluez, and
cannot find these services and characteristics.
I also try to use register-service, and register-characteristic for
hci0 using bluetoothctl, but I cannot find any added service and
characteristics under d-feet and ObjectManager. Any idea?
bluez-5.46$ sudo ./emulator/btvirt -L -l2
Bluetooth emulator ver 5.46
bluez-5.46/test$ sudo ./example-gatt-server
Registering GATT application...
GetManagedObjects
GATT application registered
Battery Level drained: 98
Battery Level drained: 96
Battery Level drained: 94
Battery Level drained: 92
Battery Level drained: 90
Battery Level drained: 88
Battery Level drained: 86
Battery Level drained: 84
sudo ./example-gatt-client
Getting objects...
No Heart Rate Service found
sudo ./client/bluetoothctl
[NEW] Controller 00:AA:01:00:00:23 hostname [default]
[NEW] Device 00:AA:01:01:00:24 hostname #2
Agent registered
[bluetooth]# power on
Changing power on succeeded
[CHG] Controller 00:AA:01:00:00:23 Powered: yes
[bluetooth]# register-service 00001820-0000-1000-8000-00805f9b34fb
[NEW] Primary Service
/org/bluez/app/service0xd5eac0
00001820-0000-1000-8000-00805f9b34fb
Internet Protocol Support
[/org/bluez/app/service0xd5eac0] Primary (yes/no): yes
register-characteristic 00002a06-0000-1000-8000-00805f9b34fb
write-without-response
[NEW] Characteristic
/org/bluez/app/service0xd5eac0/chrc0xd5f150
00002a06-0000-1000-8000-00805f9b34fb
Alert Level
[/org/bluez/app/service0xd5eac0/chrc0xd5f150] Enter value: 0x1
[bluetooth]# register-application
[CHG] Controller 00:AA:01:00:00:23 UUIDs: 00001801-0000-1000-8000-00805f9b34fb
[CHG] Controller 00:AA:01:00:00:23 UUIDs: 00001820-0000-1000-8000-00805f9b34fb
[CHG] Controller 00:AA:01:00:00:23 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb
[CHG] Controller 00:AA:01:00:00:23 UUIDs: 00001200-0000-1000-8000-00805f9b34fb
[CHG] Controller 00:AA:01:00:00:23 UUIDs: 00001800-0000-1000-8000-00805f9b34fb
[CHG] Controller 00:AA:01:00:00:23 UUIDs: 0000110c-0000-1000-8000-00805f9b34fb
Application registered
[bluetooth]# advertise on
Advertising object registered
Thanks
Best wishes
Yunhan
Hi, Luiz
Thank you. It is working now.
Best wishes
Yunhan
On Jul 31, 2017, at 6:57 AM, Luiz Augusto von Dentz
<[email protected]> wrote:
Hi Yunhan,
On Mon, Jul 31, 2017 at 10:22 AM, Yunhan Wang <[email protected]> wrote:
Hi,
I am doing some experiments to understand Bluez DBUS API using Bluez
5.46, and feel a little bit confused about Gatt Dbus example code and
bluetoothctl.
First, I do sudo bluetoothd --experimental -d, then I create two
virtual bt interfaces and bring up example-gatt-server, then
example-gatt-client cannot find any new gatt service. Any idea?
You would have to connect so the client could discover the services.
Also, I have checked all information under org.bluez using d-feet, the
gatt service and characteristics from example-gatt-client have not yet
been added. I print all infos under ObjectManager for bluez, and
cannot find these services and characteristics.
example-gatt-client only discover service over D-Bus, anyway in case
you refering to example-gatt-server its services are on the client
side, so they won't show on the bluetoothd D-Bus connection in d-feet
instead you would have to look at example-gatt-server connection.
I also try to use register-service, and register-characteristic for
hci0 using bluetoothctl, but I cannot find any added service and
characteristics under d-feet and ObjectManager. Any idea?
Same thing, they are under bluetoothctl connection not bluetoothd.
bluez-5.46$ sudo ./emulator/btvirt -L -l2
Bluetooth emulator ver 5.46
bluez-5.46/test$ sudo ./example-gatt-server
Registering GATT application...
GetManagedObjects
GATT application registered
Battery Level drained: 98
Battery Level drained: 96
Battery Level drained: 94
Battery Level drained: 92
Battery Level drained: 90
Battery Level drained: 88
Battery Level drained: 86
Battery Level drained: 84
sudo ./example-gatt-client
Getting objects...
No Heart Rate Service found
example-gatt-client doesnt connect, this is why there is no parameter
in the first place, so you would have to connect to the device first
then run it.
sudo ./client/bluetoothctl
[NEW] Controller 00:AA:01:00:00:23 hostname [default]
[NEW] Device 00:AA:01:01:00:24 hostname #2
Agent registered
[bluetooth]# power on
Changing power on succeeded
[CHG] Controller 00:AA:01:00:00:23 Powered: yes
[bluetooth]# register-service 00001820-0000-1000-8000-00805f9b34fb
[NEW] Primary Service
/org/bluez/app/service0xd5eac0
00001820-0000-1000-8000-00805f9b34fb
Internet Protocol Support
[/org/bluez/app/service0xd5eac0] Primary (yes/no): yes
register-characteristic 00002a06-0000-1000-8000-00805f9b34fb
write-without-response
[NEW] Characteristic
/org/bluez/app/service0xd5eac0/chrc0xd5f150
00002a06-0000-1000-8000-00805f9b34fb
Alert Level
[/org/bluez/app/service0xd5eac0/chrc0xd5f150] Enter value: 0x1
[bluetooth]# register-application
[CHG] Controller 00:AA:01:00:00:23 UUIDs: 00001801-0000-1000-8000-00805f9b34fb
[CHG] Controller 00:AA:01:00:00:23 UUIDs: 00001820-0000-1000-8000-00805f9b34fb
[CHG] Controller 00:AA:01:00:00:23 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb
[CHG] Controller 00:AA:01:00:00:23 UUIDs: 00001200-0000-1000-8000-00805f9b34fb
[CHG] Controller 00:AA:01:00:00:23 UUIDs: 00001800-0000-1000-8000-00805f9b34fb
[CHG] Controller 00:AA:01:00:00:23 UUIDs: 0000110c-0000-1000-8000-00805f9b34fb
Application registered
[bluetooth]# advertise on
Advertising object registered
Now you would have to select the second controller you have created,
scan and connect, that in turn will discover the service above.
Btw, I just discover a little problem when the controllers are
dual-mode it seems we don't fallback to the second bearer if the first
could not be connected, but since you are using single mode only that
should work just fine.
--
Luiz Augusto von Dentz
Hi Yunhan,
On Mon, Jul 31, 2017 at 10:22 AM, Yunhan Wang <[email protected]> wrote:
> Hi,
>
> I am doing some experiments to understand Bluez DBUS API using Bluez
> 5.46, and feel a little bit confused about Gatt Dbus example code and
> bluetoothctl.
>
> First, I do sudo bluetoothd --experimental -d, then I create two
> virtual bt interfaces and bring up example-gatt-server, then
> example-gatt-client cannot find any new gatt service. Any idea?
You would have to connect so the client could discover the services.
> Also, I have checked all information under org.bluez using d-feet, the
> gatt service and characteristics from example-gatt-client have not yet
> been added. I print all infos under ObjectManager for bluez, and
> cannot find these services and characteristics.
example-gatt-client only discover service over D-Bus, anyway in case
you refering to example-gatt-server its services are on the client
side, so they won't show on the bluetoothd D-Bus connection in d-feet
instead you would have to look at example-gatt-server connection.
> I also try to use register-service, and register-characteristic for
> hci0 using bluetoothctl, but I cannot find any added service and
> characteristics under d-feet and ObjectManager. Any idea?
Same thing, they are under bluetoothctl connection not bluetoothd.
>
> bluez-5.46$ sudo ./emulator/btvirt -L -l2
> Bluetooth emulator ver 5.46
>
>
> bluez-5.46/test$ sudo ./example-gatt-server
> Registering GATT application...
> GetManagedObjects
> GATT application registered
> Battery Level drained: 98
> Battery Level drained: 96
> Battery Level drained: 94
> Battery Level drained: 92
> Battery Level drained: 90
> Battery Level drained: 88
> Battery Level drained: 86
> Battery Level drained: 84
>
> sudo ./example-gatt-client
> Getting objects...
> No Heart Rate Service found
>
example-gatt-client doesnt connect, this is why there is no parameter
in the first place, so you would have to connect to the device first
then run it.
> sudo ./client/bluetoothctl
> [NEW] Controller 00:AA:01:00:00:23 hostname [default]
> [NEW] Device 00:AA:01:01:00:24 hostname #2
> Agent registered
> [bluetooth]# power on
> Changing power on succeeded
> [CHG] Controller 00:AA:01:00:00:23 Powered: yes
> [bluetooth]# register-service 00001820-0000-1000-8000-00805f9b34fb
> [NEW] Primary Service
> /org/bluez/app/service0xd5eac0
> 00001820-0000-1000-8000-00805f9b34fb
> Internet Protocol Support
> [/org/bluez/app/service0xd5eac0] Primary (yes/no): yes
> register-characteristic 00002a06-0000-1000-8000-00805f9b34fb
> write-without-response
> [NEW] Characteristic
> /org/bluez/app/service0xd5eac0/chrc0xd5f150
> 00002a06-0000-1000-8000-00805f9b34fb
> Alert Level
> [/org/bluez/app/service0xd5eac0/chrc0xd5f150] Enter value: 0x1
> [bluetooth]# register-application
> [CHG] Controller 00:AA:01:00:00:23 UUIDs: 00001801-0000-1000-8000-00805f9b34fb
> [CHG] Controller 00:AA:01:00:00:23 UUIDs: 00001820-0000-1000-8000-00805f9b34fb
> [CHG] Controller 00:AA:01:00:00:23 UUIDs: 0000110e-0000-1000-8000-00805f9b34fb
> [CHG] Controller 00:AA:01:00:00:23 UUIDs: 00001200-0000-1000-8000-00805f9b34fb
> [CHG] Controller 00:AA:01:00:00:23 UUIDs: 00001800-0000-1000-8000-00805f9b34fb
> [CHG] Controller 00:AA:01:00:00:23 UUIDs: 0000110c-0000-1000-8000-00805f9b34fb
> Application registered
> [bluetooth]# advertise on
> Advertising object registered
Now you would have to select the second controller you have created,
scan and connect, that in turn will discover the service above.
Btw, I just discover a little problem when the controllers are
dual-mode it seems we don't fallback to the second bearer if the first
could not be connected, but since you are using single mode only that
should work just fine.
--
Luiz Augusto von Dentz