Re: bluetoothctl: list-attributes doesn't list services from example-gatt-server

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On 09.07.2019 14:14, Rafał Miłecki wrote:
On 07.07.2019 12:14, Rafał Miłecki wrote:
I decided to test GATT. On elitebook I started:
./test/example-gatt-server
and waited to let matebook refresh all info.

After that I got:

[elitebook]# info 20:16:B9:D8:A9:3B
Device 20:16:B9:D8:A9:3B (public)
         Name: elitebook
         Alias: elitebook
         Class: 0x001c010c
         Icon: computer
         Paired: yes
         Trusted: yes
         Blocked: no
         Connected: yes
         LegacyPairing: no
         UUID: IrMC Sync                 (00001104-0000-1000-8000-00805f9b34fb)
         UUID: OBEX Object Push          (00001105-0000-1000-8000-00805f9b34fb)
         UUID: OBEX File Transfer        (00001106-0000-1000-8000-00805f9b34fb)
         UUID: Headset                   (00001108-0000-1000-8000-00805f9b34fb)
         UUID: Audio Source              (0000110a-0000-1000-8000-00805f9b34fb)
         UUID: Audio Sink                (0000110b-0000-1000-8000-00805f9b34fb)
         UUID: A/V Remote Control Target (0000110c-0000-1000-8000-00805f9b34fb)
         UUID: A/V Remote Control        (0000110e-0000-1000-8000-00805f9b34fb)
         UUID: Headset AG                (00001112-0000-1000-8000-00805f9b34fb)
         UUID: Phonebook Access Server   (0000112f-0000-1000-8000-00805f9b34fb)
         UUID: Message Access Server     (00001132-0000-1000-8000-00805f9b34fb)
         UUID: Message Notification Se.. (00001133-0000-1000-8000-00805f9b34fb)
         UUID: PnP Information           (00001200-0000-1000-8000-00805f9b34fb)
         UUID: Heart Rate                (0000180d-0000-1000-8000-00805f9b34fb)
         UUID: Battery Service           (0000180f-0000-1000-8000-00805f9b34fb)
         UUID: Vendor specific           (00005005-0000-1000-8000-0002ee000001)
         UUID: Vendor specific           (12345678-1234-5678-1234-56789abcdef0)
         Modalias: usb:v1D6Bp0246d0532

That seems all correct for now. Test example-gatt-server registers
Heart Rate, Battery & Test services. All of them appeared as expected.

My problem is that I can't list GATT attributes. I don't any output.
Is there anything I'm doing incorrectly?

I decided to test nRF Connect Android app. It showed something
interesting about my bluetooth devices. It nicely displays & parses
advertising data.

Logitech M590 advertises:
0x01 Flags
0x03 Complete List of 16-bit Service Class UUIDs
0x09 Complete Local Name
0x0A Tx Power Level
0x19 Appearance

BlueZ on "elitebook" advertises:
0xFF Manufacturer Specific Data
or to say precisely:
0x1BFF750042040180AE78BDBC0B7E307ABDBC0B7E2F01000000000000

Any idea/hint why BlueZ 5.30 on my "elitebook" notebook doesn't
advertise more data?

I've discovered I also need to run test/example-advertisement. Then I
can see my notebook advertise UUIDs and characteristics. It seems that
test/example-gatt-server is insufficient on its own.



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