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62 lines
1.8 KiB
62 lines
1.8 KiB
7 years ago
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#!/bin/bash
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7 years ago
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# Copyright 2018 Denes Matetelki
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# This file is part of battery_status_led.
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# battery_status_led is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License v3 as published by the Free Software Foundation.
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# battery_status_led is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License v3 for more details.
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# You should have received a copy of the GNU General Public License v3 along with battery_status_led. If not, see https://www.gnu.org/licenses/gpl-3.0.html.
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7 years ago
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# limits in percentages
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LOW=10 # flip LED every 2s
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CRIT=5 # flip led every 0.5s
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BAT_FULL=`cat /sys/class/power_supply/BAT0/energy_full_design`
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CAPSLOCK_LED=`cat /sys/class/leds/input4\:\:capslock/brightness`
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LED_DEV=/sys/class/leds/input4\:\:capslock/brightness
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CNT=0
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while :
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do
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# If charging, sleep 1m, then restart the cycle
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STATUS=`cat /sys/class/power_supply/BAT0/status`
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if [ $STATUS == "Charging" ] ; then
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echo 0 > $LED_DEV
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sleep 1m
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continue
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fi
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BAT_NOW=`cat /sys/class/power_supply/BAT0/energy_now`
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BAT_PCT=$(($BAT_NOW * 100 / $BAT_FULL))
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# If battery has more than >10% left, sleep 1m then restart the cycle
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if (($BAT_PCT > $LOW )) ; then
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sleep 1m
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continue
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fi
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sleep 0.5s
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CNT=$((CNT+1))
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# If battery <5% (crytical) flip capslock LED every 0.5s
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if (( $BAT_PCT <= $CRIT )) ; then
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CAPSLOCK_LED=$((1 ^ $CAPSLOCK_LED))
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echo $CAPSLOCK_LED > $LED_DEV
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# If battery is on low, but not crytical, flip LED every 4th 0.5s (2s)
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elif (( $BAT_PCT <= $LOW )) && (( $CNT % 4 == 1 )) ; then
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CAPSLOCK_LED=$((1 ^ $CAPSLOCK_LED))
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echo $CAPSLOCK_LED > $LED_DEV
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fi
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# not sure if i need this:
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if (( $CNT > 100000 )) ; then
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CNT=1
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fi
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done
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