airpods-notification.sh

#!/bin/sh

OUTPUT=''
BLUETOOTH_DEFAULTS=$(defaults read /Library/Preferences/com.apple.Bluetooth)
SYSTEM_PROFILER=$(system_profiler SPBluetoothDataType 2>/dev/null)
MAC_ADDR=$(grep -b2 "Minor Type: Headphones"<<<"${SYSTEM_PROFILER}"|awk '/Address/{print $3}')

CONNECTED=$(grep -ia6 "${MAC_ADDR}"<<<"${SYSTEM_PROFILER}"|awk '/Connected: Yes/{print 1}')

BLUETOOTH_DATA=$(grep -ia6 '"'"${MAC_ADDR}"'"'<<<"${BLUETOOTH_DEFAULTS}")
BATTERY_LEVELS=("BatteryPercentCombined" "HeadsetBattery" "BatteryPercentSingle" "BatteryPercentCase" "BatteryPercentLeft" "BatteryPercentRight")

if [[ "${CONNECTED}" ]]; then
  for I in "${BATTERY_LEVELS[@]}"; do
    declare -x "${I}"="$(awk -v pat="${I}" '$0~pat{gsub (";",""); print $3 }'<<<"${BLUETOOTH_DATA}")"
    [[ ! -z "${!I}" ]] && OUTPUT="${OUTPUT} $(awk '/BatteryPercent/{print substr($0,15,1)": "}'<<<"${I}")${!I}%"
  done
fi

osascript -e "display notification \"${OUTPUT}\" with title \"AirPods connected\""