lid_led.sh

#!/bin/bash

#hack the planet
morse=".... .- -.-. -.- / - .... . / .--. .-.. .- -. . -"

# testing morse
#morse=".... .... .... --- ..."

# TIME_UNIT
TU=0.1


# ----------------------------------------------------------
#There are rules to help people distinguish dots from dashes in Morse code.
# ---
#The length of a dot is 1 time unit.
#A dash is 3 time units.
#The space between symbols (dots and dashes) of the same letter is 1 time unit.
#The space between letters is 3 time units.
#The space between words is 7 time units.
# ----------------------------------------------------------



high() {
	light -s sysfs/leds/tpacpi::lid_logo_dot -A 1
}
low() {
	light -s sysfs/leds/tpacpi::lid_logo_dot -U 1
}

dot() {
	high
	sleep $TU
	low
	sleep $TU
	low
}
dash() {
	high
	sleep $TU
	sleep $TU
	sleep $TU
	low
	sleep $TU
	low
}
char_space() {
	low
	sleep $TU
	sleep $TU
	sleep $TU
	low
}
word_space() {
	low
	sleep $TU
	sleep $TU
	sleep $TU
	sleep $TU
	sleep $TU
	sleep $TU
	sleep $TU
	low
}


run_morse() {

	echo $morse | while read -n1 item
	do
		echo $item
		case $item in
			.)
				echo dot
				dot;;
			-)
				echo dash
				dash;;
			/)
				echo slash
				word_space;;
			'')
				echo space
				char_space;;
			*)
				echo OMFG unknown;;
		esac
	done
}

blink() {
	while true
	do
		light -s sysfs/leds/tpacpi::lid_logo_dot -U 1
		light -s sysfs/leds/tpacpi::lid_logo_dot -G
		sleep 0.05
		light -s sysfs/leds/tpacpi::lid_logo_dot -A 1
		light -s sysfs/leds/tpacpi::lid_logo_dot -G
		sleep 0.05
	done
}

show_help() {
	echo "Morse Code LED Blinker"
	echo "Usage: $0 <arg>"
	echo "-h | show this help"
	echo "-l | show morse code continuously"
	echo "-m | run morse code once"
	echo "-b | blink on off rapidly"
}


case $1 in
	-l)
		echo "Looping, exit with ^C"
		while true;
		do
			run_morse
		done;;
	-b)
		echo "Blinking"
		blink;;
	-m)
		echo "Morse"
		run_morse;;
	-h)
		show_help;;
	*)
		show_help;;
esac

lidled.service

[Unit]
Description=BLINKLED service
After=network.target

[Service]
ExecStart=/root/lid_led.sh -l
ExecReload=/bin/kill $MAINPID
KillMode=process
Restart=always

[Install]
WantedBy=multi-user.target