The goal of this project is to get battery status on headsets in Linux using HSP/HFP protocol.
Current implementation uses BlueZ to get connection to HSP/HFP profile of a newly connected device.
It interprets only the AT+IPHONEACCEV command used by Apple.
The only problem is that it snatches the handling of the BT headset profile from pulseaudio. On the other hand, the pulseaudio does not do anything useful with it and does not seem to mind
- Another way to report battery status of headset is through AVRCP protocol, which is used in A2DP.
The handling must be added to BlueZ, search for
avrcp_handle_ct_battery_status(). - Many devices support the GATT protocol. This should be supported by BlueZ as well as Upower.
- The BlueZ example in
test/test-hfpmakes the skeleton of this code. - I've used parsing of the
IPHONEACCEVvalue from: https://github.com/TheWeirdDev/Bluetooth_Headset_Battery_Level/