Re: Not shown registered gatt services on an android 5.1.1

[Luiz Augusto von Dentz <luiz.dentz@gmail.com>]

Hi Tak,

On Thu, Apr 7, 2016 at 2:20 PM, Hyuntak Lee <pphdev12@gmail.com> wrote:
> Dears,
>
> I am testing a gatt server with iphone and android.
> iPhone is working nicely, but unfortunately andorid cannot retrive
> registered GATT services.
> I tested with a bluez-5.39/test/example-gatt-server file.
> Can you advice me?
>
> My step is below:
>
> * Peripheral env
> ** Bluez 5.39
> ** Linux Kernel 3.18
> ** BT Dongle: NEXT-204BT(CSR 4.0)
>
> * Central env
> ** Android 5.1.1 and iOS 9.3.1
> ** Test app: nRF MCP
>
> * Build configure
> ./configure --prefix=/usr     \
>             --sysconfdir=/etc    \
>             --localstatedir=/var \
>             --enable-library      \
>             --enable-experimental \
>             --disable-systemd
>
> * STEP
> 1. Executes a bluetooth daemon:
> $ bluetoothd -ndE
>
> 2. Register gatt services
> $ python bluez-5.39/test/example-gatt-server
> For register service(Heart Rate, Battery Service)
>
> 3. To advertising and pairing:
> $ hciconfig hci0 reset
> $ hciconfig hci0 pscan;   # PSCAN need to pair with android
> $ hcitool -i hci0 cmd 0x08 0x000a 00;
> $ hcitool -i hci0 cmd 0x08 0x0008 03 02 0a 0a 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00;
> $ hcitool -i hci0 cmd 0x08 0x000a 01;
>
> 4. connect to gatt server
> 4.1 with iOS 9.3.1
> Retrieved list
> - Heart Rate (UUID: 0x180D)
> - Battery Service (UUID: 0x180F)
>
> 4.2 with android 5.1.1
> Retrieved list
> - Generic Attribute(UUID: 0x1801)
> - Generic Access(UUID: 0x1800)
>
>
>
> Only android don't get registerted services.
> I founded different part of bluetoothd log in the case of iphone and
> android. I hope these are helpful to you.
>
> Logs of iOS case:
>
> bluetoothd[2976]: src/gatt-database.c:connect_cb() New incoming LE ATT
> connection
> bluetoothd[2976]: attrib/gattrib.c:g_attrib_ref() 0x1e53230: g_attrib_ref=1
> bluetoothd[2976]: src/gatt-client.c:btd_gatt_client_connected() Device
> connected.
> bluetoothd[2976]: src/device.c:load_gatt_db() Restoring
> 57:92:97:B5:A8:C4 gatt database from file
> bluetoothd[2976]: No cache for 57:92:97:B5:A8:C4
> bluetoothd[2976]: src/device.c:gatt_debug() MTU exchange complete, with MTU: 158
> bluetoothd[2976]: src/device.c:gatt_debug() Read By Grp Type - start:
> 0x0001 end: 0xffff
> bluetoothd[2976]: src/device.c:gatt_debug() Read By Grp Type - start:
> 0x0021 end: 0xffff
> bluetoothd[2976]: src/device.c:gatt_debug() Read By Type - start:
> 0x0006 end: 0x0009
> bluetoothd[2976]: src/device.c:gatt_debug() Find Info - start: 0x0009
> end: 0x0009
> bluetoothd[2976]: src/device.c:gatt_debug() Write Req - handle: 0x0009
> bluetoothd[2976]: src/gatt-database.c:gatt_ccc_write_cb() CCC write
> called for handle: 0x0009
> bluetoothd[2976]: src/device.c:gatt_debug() Primary services found: 8
> bluetoothd[2976]: src/device.c:gatt_debug() start: 0x0001, end:
> 0x0005, uuid: 00001800-0000-1000-8000-00805f9b34fb
> bluetoothd[2976]: src/device.c:gatt_debug() start: 0x0006, end:
> 0x0009, uuid: 00001801-0000-1000-8000-00805f9b34fb
> bluetoothd[2976]: src/device.c:gatt_debug() start: 0x000a, end:
> 0x000e, uuid: d0611e78-bbb4-4591-a5f8-487910ae4366
> bluetoothd[2976]: src/device.c:gatt_debug() start: 0x000f, end:
> 0x0012, uuid: 0000180f-0000-1000-8000-00805f9b34fb
> bluetoothd[2976]: src/device.c:gatt_debug() start: 0x0013, end:
> 0x0018, uuid: 00001805-0000-1000-8000-00805f9b34fb
> bluetoothd[2976]: src/device.c:gatt_debug() start: 0x0019, end:
> 0x001d, uuid: 0000180a-0000-1000-8000-00805f9b34fb
> bluetoothd[2976]: src/device.c:gatt_debug() start: 0x001e, end:
> 0x0027, uuid: 7905f431-b5ce-4e99-a40f-4b1e122d00d0
> bluetoothd[2976]: src/device.c:gatt_debug() start: 0x0028, end:
> 0x0033, uuid: 89d3502b-0f36-433a-8ef4-c502ad55f8dc
> bluetoothd[2976]: src/device.c:gatt_debug() Secondary service
> discovery failed. ATT ECODE: 0x0a
>
> Logs of android case:
>
> bluetoothd[2976]: src/gatt-database.c:connect_cb() New incoming LE ATT
> connection
> bluetoothd[2976]: attrib/gattrib.c:g_attrib_ref() 0x1e35fe8: g_attrib_ref=1
> bluetoothd[2976]: src/gatt-client.c:btd_gatt_client_connected() Device
> connected.
> bluetoothd[2976]: src/device.c:load_gatt_db() Restoring
> 30:75:12:94:47:D5 gatt database from file
> bluetoothd[2976]: No cache for 30:75:12:94:47:D5
> bluetoothd[2976]: src/device.c:gatt_debug() MTU Exchange failed. ATT ECODE: 0x06

We did have some problems with Android up to 4.4 when Android would
stop sending any request when it gets a MTU Exchange but this has been
working with 5.1 and later so Im not sure if this is related. You can
check if that is the case with the following patch:
http://www.spinics.net/lists/linux-bluetooth/msg66498.html (I end up
abandoning it since it was supposed to work with more recent
Androids).

> bluetoothd[2976]: src/device.c:gatt_debug() Primary services found: 2
> bluetoothd[2976]: src/device.c:gatt_debug() start: 0x0001, end:
> 0x0005, uuid: 00001801-0000-1000-8000-00805f9b34fb
> bluetoothd[2976]: src/device.c:gatt_debug() start: 0x0014, end:
> 0xffff, uuid: 00001800-0000-1000-8000-00805f9b34fb
> bluetoothd[2976]: src/device.c:gatt_debug() Secondary service
> discovery failed. ATT ECODE: 0x10
>
>
> It looks like if request is from an android, cannot find primary services.
> How can I use a GATT service with an android?
> Pls advise me.
>
> Best Regards,
> Tak
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-- 
Luiz Augusto von Dentz