I actually had a similar problem with my headset, and it turns out that a headset can report its battery status through Apple-specific AT commands, namely through a "AT+IPHONEACCEV command". If you listen through Wireshark or something similar, you may periodically receive battery level info. In my case it was "AT+IPHONEACCEV=2,1,2,2,0", which corresponded to 30% of battery (value after "1" means "battery level", and level is scaled between 0 and 9). Hope that helps. Documentation: https://developer.apple.com/accessories/Accessory-Design-Guidelines.pdf W dniu 23.01.2019 o 18:27, Grigory Fateyev pisze:> It has such info: > > [MDR-XB650BT]# info 00:18:09:C5:44:1E > Device 00:18:09:C5:44:1E > Name: MDR-XB650BT > Alias: MDR-XB650BT > Class: 0x240404 > Icon: audio-card > Paired: yes > Trusted: yes > Blocked: no > Connected: yes > LegacyPairing: no > UUID: Headset (00001108-0000-1000-8000-00805f9b34fb) > 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: Handsfree (0000111e-0000-1000-8000-00805f9b34fb) > > PS. Luiz, sorry for the direct copy! > > =D1=81=D1=80, 23 =D1=8F=D0=BD=D0=B2. 2019 =D0=B3. =D0=B2 20:04, Luiz August= > o von Dentz <luiz.dentz@xxxxxxxxx>: >> >> Hi Grigory, >> On Wed, Jan 23, 2019 at 6:22 PM Grigory Fateyev <gfborn@xxxxxxxxx> wrote: >>> >>> Hello! >>> >>> I have a bluetooth headset Sony MDR-XB650BT. >>> >>> # hcitool info 00:18:09:C5:44:1E >>> Requesting information ... >>> BD Address: 00:18:09:C5:44:1E >>> OUI Company: CRESYN (00-18-09) >>> Device Name: MDR-XB650BT >>> LMP Version: 4.0 (0x6) LMP Subversion: 0x2576 >>> Manufacturer: Cambridge Silicon Radio (10) >>> Features page 0: 0xff 0xff 0x8f 0xfe 0x9b 0xff 0x59 0x87 >>> <3-slot packets> <5-slot packets> <encryption> <slot offset> >>> <timing accuracy> <role switch> <hold mode> <sniff mode> >>> <park state> <RSSI> <channel quality> <SCO link> <HV2 packets> >>> <HV3 packets> <u-law log> <A-law log> <CVSD> <paging scheme> >>> <power control> <transparent SCO> <broadcast encrypt> >>> <EDR ACL 2 Mbps> <EDR ACL 3 Mbps> <enhanced iscan> >>> <interlaced iscan> <interlaced pscan> <inquiry with RSSI> >>> <extended SCO> <EV4 packets> <EV5 packets> <AFH cap. slave> >>> <AFH class. slave> <3-slot EDR ACL> <5-slot EDR ACL> >>> <sniff subrating> <pause encryption> <AFH cap. master> >>> <AFH class. master> <EDR eSCO 2 Mbps> <EDR eSCO 3 Mbps> >>> <3-slot EDR eSCO> <extended inquiry> <simple pairing> >>> <encapsulated PDU> <non-flush flag> <LSTO> <inquiry TX power> >>> <EPC> <extended features> >>> Features page 1: 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00 >>> >>> I'd like to get the energy level at least in shell. In which direction >>> I should look for? How to know if my device has GATT support? If it >>> connected with Android smartphone, where Android version is < 6.0, it >>> has an icon with level in percents. I want to get the same on my linux >>> machine. >> >> bluetoothd should be able to detect if there is a battery service, >> well at least if you are connect over LE, note that in past there >> exists ways to fetch the battery level of AVRCP and HFP via AT >> commands, so perhaps Android is using one of those, btw you should be >> able to see what bluetoothd has discover with: >> >> bluetoothctl> info <bdaddr> >> >>> Thank you! >>> >>> -- >>> Grigory >> >> >> >> -- >> Luiz Augusto von Dentz > > > > --=20 > Grigory >
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