1. prepare
apt install python3-bluez
2. for python 3.10
pip install git+https://github.com/pybluez/pybluez
3. about battery
PauseAudio enable Battery info in 2022 (?)
pactl list cards | grep battery will show battery percentage
also show in /var/log/syslog like this
pulseaudio[1226]: Battery Level: 100%
for unknown periods
2023/01/07 modified : ignore anything about "-E" or Experimental option, don't care about complain in syslog, just look syslog, or "pactl list cards" to get battery level
with "-E" option, or use blueman "battery option" , the red power indicator always show on indicator area, anonnying!
and it complain about "Could not find org.bluez.BatteryProviderManager1.RegisterBatteryProvider(), is bluetoothd started with experimental features enabled (-E flag)?" even if modify daemon script to start with -E.
sudo vi /etc/systemd/system/bluetooth.target.wants/bluetooth.service
sudo systemctl daemon-reload
sudo systemctl restart bluetooth
the battery report seems related to this "-E flag", not sure
