Re: Not shown registered gatt services on an android 5.1.1

[Szymon Janc <ext.szymon.janc@tieto.com>]

Hi,

On Friday 15 of April 2016 16:36:32 Hyuntak Lee wrote:
> 2016-04-15 15:48 GMT+09:00 King so <sok02074@gmail.com>:
> > Hi Tak,
> > 
> > I also have the same problem. (Central is iPhone, Peripheral is Raspberry
> > pi)
> > 
> > Did you resolve it?
> > 
> > Thanks for your time
> 
> Hi King,
> 
> I didn`t find any solution or workaround yet.
> 
> So I'm waiting for a reply from the bluez team.
> 

This is due to Android connecting over BR/EDR for dualmode devices.
(this is the reason you had to enable pscan to make it connect).

To workaround this:
tools/btmgmt power off
tools/btmgmt bredr off
tools/btmgmt power on

Unpair device on Android phone and toggle BT off/on on the phone.
After that it should work OK.

Also please DONT'T use hcitool for enabling advertising.
Use advertisement API  (just start ./test/example-advertisement)

Not having registered GATT services over BR/EDR is something we need to work 
on (or disable GATT over BR/EDR).



> Best Regards,
> Tak
> 
> > 2016-04-08 11:54 GMT+09:00 Hyuntak Lee <pphdev12@gmail.com>:
> >> Hi Luiz,
> >> 
> >> 2016-04-07 21:17 GMT+09:00 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).
> >> 
> >> Thanks for your reply.
> >> 
> >> As a result, Android still cannot find primary services.
> >> I compared a bluez-5.39 source with
> >> http://www.spinics.net/lists/linux-bluetooth/msg66498.html
> >> It seemed not applied to 5.39. so, I edited a source and recompiled
> >> and try again.
> >> 
> >> Logs:
> >> bluetoothd[18338]: src/gatt-client.c:btd_gatt_client_connected()
> >> Device connected.
> >> bluetoothd[18338]: src/device.c:load_gatt_db() Restoring
> >> 30:75:12:94:47:D5 gatt database from file
> >> bluetoothd[18338]: No cache for 30:75:12:94:47:D5
> >> bluetoothd[18338]: src/device.c:gatt_debug() Primary services found: 2
> >> bluetoothd[18338]: src/device.c:gatt_debug() start: 0x0001, end:
> >> 0x0005, uuid: 00001801-0000-1000-8000-00805f9b34fb
> >> bluetoothd[18338]: src/device.c:gatt_debug() start: 0x0014, end:
> >> 0xffff, uuid: 00001800-0000-1000-8000-00805f9b34fb
> >> bluetoothd[18338]: src/device.c:gatt_debug() Secondary service
> >> discovery failed. ATT ECODE: 0x10
> >> 
> >> Log is changed, do not show 'MTU Exchange failed. ATT ECODE: 0x06'
> >> message.
> >> But, still not discover all primary services. Not shown a log message
> >> like this "Read By Grp Type - start: 0x0001 end: 0xffff"
> >> 
> >> Can you advice me?
> >> 
> >> Best Regards,
> >> Tak
> >> 
> >>>> 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
> 
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-- 
BR
Szymon Janc