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Date: Sat, 1 Aug 2015 17:24:37 -0600
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Subject: Re: bluetoothctl list-attributes command
From: Mark Rages <markrages@gmail.com>
To: linux-bluetooth@vger.kernel.org
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On Wed, Jul 29, 2015 at 5:22 PM, Mark Rages <markrages@gmail.com> wrote:
> I solved my previous problem with list-attributes, but now I face another one.
>
> I am trying to interact with the heart rate monitor strap
> 'CB:D7:A0:40:C4:01' using bluetoothctl:
>
> $ bluetoothctl
> [NEW] Controller 00:02:72:C8:B1:AD qountdown [default]
> [NEW] Device CB:D7:A0:40:C4:01 mar
> [NEW] Service /org/bluez/hci0/dev_CB_D7_A0_40_C4_01/service0023 Vendor
> specific (Primary)
> [NEW] Characteristic
> /org/bluez/hci0/dev_CB_D7_A0_40_C4_01/service0023/char0026 Vendor
> specific
> [NEW] Characteristic
> /org/bluez/hci0/dev_CB_D7_A0_40_C4_01/service0023/char0024 Vendor
> specific
> [NEW] Service /org/bluez/hci0/dev_CB_D7_A0_40_C4_01/service0012
> Battery Service (Primary)
> [NEW] Characteristic
> /org/bluez/hci0/dev_CB_D7_A0_40_C4_01/service0012/char0013 Battery
> Level
> [NEW] Descriptor
> /org/bluez/hci0/dev_CB_D7_A0_40_C4_01/service0012/char0013/desc0015
> Client Characteristic Configuration
> [bluetooth]# connect CB:D7:A0:40:C4:01
> Attempting to connect to CB:D7:A0:40:C4:01
> Connection successful
> [mar]# list-attributes
> Service /org/bluez/hci0/dev_CB_D7_A0_40_C4_01/service0023 Vendor
> specific (Primary)
> Characteristic /org/bluez/hci0/dev_CB_D7_A0_40_C4_01/service0023/char0026
> Vendor specific
> Characteristic /org/bluez/hci0/dev_CB_D7_A0_40_C4_01/service0023/char0024
> Vendor specific
> Service /org/bluez/hci0/dev_CB_D7_A0_40_C4_01/service0012 Battery
> Service (Primary)
> Characteristic /org/bluez/hci0/dev_CB_D7_A0_40_C4_01/service0012/char0013
> Battery Level
> Descriptor /org/bluez/hci0/dev_CB_D7_A0_40_C4_01/service0012/char0013/desc0015
> Client Characteristic Configuration
> [mar]#
>
> So only two services are listed.
>
> But according to the Nordic Semiconductor "Master Control Panel" app,
> this device offers six services:
>
> Generic Access (0x1800)
> Generic Attribute (0x1801)
> Heart Rate (0x180d)
> Battery (0x180f)
> Device Information (0x180a)
> Unknown (0x4001-ceed)
>
> list-attributes only lists the Battery and 0x4001 services.
>
> Why is list-attributes only showing two services?  How can I connect
> to the Heart Rate (0x180d) service?

Is it possible to connect to subscribe to notifications on the heart
rate service?

Regards,
Mark
markrages@gmail