Hi all,
I have built bluez-5.23 into my Ubuntu 14 system and am having issues
customizing the GATT server running on it. My GATT client is another
Ubuntu 14 system and I am using the gatttool utility to connect and
perform operations.
I am running the tools/gatt-service sample (unmodified) that is built
with the bluez package. My goal is to see the R/W descriptor that is
added to the Immediate Alert Service (IAS UUID 0x1802) by this
application from the GATT client and perform both read and write
operations with it. This will be a base-line for creating a full custom
service for my specific application development.
Running the gatt-service application appears to successfully register
the descriptor with the service:
ubuntu:~/bluez-5.23/tools$ sudo ./gatt-service
gatt-service unique name: :1.655
Registered service: /service1
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 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")
RegisterService: OK
My GATT server is run from the command line with the arguments: -n -d
-E. The console output of bluetoothd appears to process the requests
without error:
bluetoothd[30309]: src/gatt-dbus.c:register_service() New service
0x831c498: /service1
bluetoothd[30309]: src/gatt-dbus.c:proxy_added() path /service1 iface
org.bluez.GattService1
bluetoothd[30309]: src/gatt-dbus.c:proxy_added() path
/service1/characteristic1 iface org.bluez.GattCharacteristic1
bluetoothd[30309]: src/gatt-dbus.c:proxy_added() path
/service1/characteristic1/descriptor2 iface org.bluez.GattDescriptor1
bluetoothd[30309]: src/gatt-dbus.c:register_external_characteristics()
Added GATT: /service1/characteristic1 (00002a06-0000-1000-8000-00805f9b34fb)
bluetoothd[30309]: src/gatt-dbus.c:register_external_characteristics()
Added GATT: /service1/characteristic1/descriptor2
(8260c653-1a54-426b-9e36-e84c238bc669)
bluetoothd[30309]: src/gatt-dbus.c:client_ready() Added GATT service
/service1
But when I view the descriptors for the IAS from the GATT client I only
see one descriptor... the Alert Level (0x2A06).
[CON][00:02:72:C9:5E:0F][LE]> primary
attr handle: 0x0001, end grp handle: 0x0008 uuid:
00001800-0000-1000-8000-00805f9b34fb
attr handle: 0x0009, end grp handle: 0x000c uuid:
0000a002-0000-1000-8000-00805f9b34fb
attr handle: 0x0010, end grp handle: 0x0010 uuid:
00001801-0000-1000-8000-00805f9b34fb
attr handle: 0x001b, end grp handle: 0x0025 uuid:
0000a004-0000-1000-8000-00805f9b34fb
attr handle: 0x0026, end grp handle: 0x0028 uuid:
00001803-0000-1000-8000-00805f9b34fb
attr handle: 0x0029, end grp handle: 0x002c uuid:
00001804-0000-1000-8000-00805f9b34fb
attr handle: 0x002d, end grp handle: 0x002f uuid:
00001802-0000-1000-8000-00805f9b34fb
attr handle: 0x0030, end grp handle: 0x0035 uuid:
00001805-0000-1000-8000-00805f9b34fb
attr handle: 0x0036, end grp handle: 0x003a uuid:
00001806-0000-1000-8000-00805f9b34fb
attr handle: 0x003b, end grp handle: 0x0043 uuid:
0000180e-0000-1000-8000-00805f9b34fb
attr handle: 0x0044, end grp handle: 0x0050 uuid:
00001811-0000-1000-8000-00805f9b34fb
attr handle: 0xfffa, end grp handle: 0xfffe uuid:
feee74dc-a8de-3196-1149-d43596c00a4f
[CON][00:02:72:C9:5E:0F][LE]> characteristics 0x002d 0x002f
handle: 0x002e, char properties: 0x04, char value handle: 0x002f, uuid:
00002a06-0000-1000-8000-00805f9b34fb
[CON][00:02:72:C9:5E:0F][LE]> char-desc 0x002e 0x002f
handle: 0x002e, uuid: 2803
handle: 0x002f, uuid: 2a06
Where is the descriptor (8260c653-1a54-426b-9e36-e84c238bc669)
registered by gatt-service?
Thanks,
Nathan Jozwiak
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