Re: Bose Quiet Comfort 35 Remaining Battery Reporting

[Hugues <morisset.hugues@gmail.com>]

Hello,
Sebastian code works great!
But how can I proceed so the remaining battery is exposed over upower?

	Greping through pulseaudio sources
(git://anongit.freedesktop.org/pulseaudio/pulseaudio) for 'battery'
doesn't return anything, so anything about battery power seems unlikely
to be merged into pulseaudio.

	upower already expose batteries from bluez through dbus
(git://anongit.freedesktop.org/upower:src/linux/up-device-bluez.c)

So is it possible to do the AT commands at the bluez level and expose
the infos through dbus, so upower expose it to the rest of the system?

Thanks,
Hugues

On 02/24/2017 12:01 PM, Hugues wrote:
> Hello,
> Thanks a lot!
> I tried to connect to the headset through dbus to make the AT commands,
> but failed.
> So what's the services/program where this should be implemented so it
> can be exposed on dbus and picked up by the Desktop Environment?
> 
> Regards,
> Hugues
> 
> On 02/13/2017 06:55 AM, Sebastian Reichel wrote:
>> Hi,
>>
>> FWIW I was also interested in battery level of my Bose QC35 and
>> checked this some time ago. That time I only checked the low
>> energy stuff, since the Android application seems to know the
>> battery status with only LE being connected.
>>
>> Marcel Holtman wrote:
>>>> This headset do have dual mode, I searched around using gatttool ant the
>>>> gatt specification but I find nothing about Battery Level
>>>> (org.bluetooth.characteristic.battery_level.xml) or Battery Service
>>>> (org.bluetooth.service.battery_service.xml).
>>
>> Bose QC35 does not expose battery status through standard battery_level
>> characteristic. There is a proprietary primary service 0xfebe (which
>> is assigned to Bose) with a couple of custom services. I assume battery
>> level can be read through them, but the required commands are unknown.
>>
>>>> How could I read what's in the Apple HFP extensions?
>>>
>>> Start with this one. It describes the extra HFP AT commands that iOS uses:
>>>
>>> https://developer.apple.com/hardwaredrivers/BluetoothDesignGuidelines.pdf
>>
>> Thanks for the documentation link! That is actually implemented for
>> the Bose QC35. Here is a quick hack providing battery status info
>> in pulseaudio log:
>>
>> https://github.com/sre/pulseaudio/commit/d66b66d20e9bc73e6d0ca89283cf2b5675304b00
>>
>> -- Sebastian
>>
>