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. Thank you! -- Grigory
