From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <morisset.hugues@gmail.com>
Subject: Re: Bose Quiet Comfort 35 Remaining Battery Reporting
To: Marcel Holtmann <marcel@holtmann.org>,
 Luiz Augusto von Dentz <luiz.dentz@gmail.com>
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Cc: "linux-bluetooth@vger.kernel.org" <linux-bluetooth@vger.kernel.org>
From: Hugues <morisset.hugues@gmail.com>
Message-ID: <589DCA8A.3060905@gmail.com>
Date: Fri, 10 Feb 2017 15:13:30 +0100
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On 02/08/2017 02:19 PM, Marcel Holtmann wrote:
> Hi Luiz,
> 
>>> Thanks for the reply, I know the bose android application do report the
>>> battery power of the headset, but I don't know if it is done in a
>>> propitiatory manner. How could I check that ?
>>
>> It is probably the 00000000-deca-fade-deca-deafdecacaff service, Ive
>> also seem some bose devices that are dual-mode so they have a GATT
>> service over LE that might expose these details.
> 
> or it uses the Apple HFP extensions they defined to get battery status. Also 00000000-deca-fade-deca-deafdecacaff should be the wireless version of Apple’ iAP (iPod Accessory Protocol).
> 
> Regards
> 
> Marcel
> 
> 

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). How could I read what's in
the APple HFP extensions ?