Inhibit power management and alarm if power is off

poweron.sh

isAC(){
	pmset -g batt | grep AC > /dev/null
}

TXT=$*

if [ "$TXT" = "" ]
then
	TXT="อย่าปิดปลั๊ก"
fi

POWERON=1

trap 'kill $(jobs -p);echo Stopped inhibiting power management' EXIT
caffeinate -i &
echo "Inhibited power management"

while true
do
	while isAC
	do
		if [ "$POWERON" = 0 ]
		then
			echo "Power engaged on" `date`
			POWERON=1
		fi
		sleep 1
	done
	if [ "$POWERON" = 1 ];
	then
		echo "Power disengaged on" `date`
		POWERON=0
	fi
	osascript -e "set Volume 10"
	say -v Kanya $TXT
done

The set Volume N is deprecated, better use set volume output volume M where M is in percentage.

Here is a function to run say with full volume.

#!/bin/bash

loud_say() {
  OLD_VOLUME=`osascript -e "output volume of (get volume settings)"`
  osascript -e "set volume output volume 100"
  say "$@"
  osascript -e "set volume output volume $OLD_VOLUME"
}

loud_say -v Kanya ทดสอบ