parent
bd6e9a4ad6
commit
82e972ffa7
GPG Key ID:
A7D50EAD42F9FC9F
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# Battery Status LED
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Battery (low/critical) status indication by making a (the capslock) LED blink
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## Prerequisites:
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Make sure you have your laptop's ACPI module compiled into your kernel:
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```
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Device Drivers > X86 Platform Specific Device Drivers
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```
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For example: Asus laptop extras, ThinkPad ACPI Laptop Extras, etc.
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## Usage:
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Execute the script as a root user:
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```
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/usr/bin/battery-status-led.sh
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```
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Or start with systemd:
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```
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systemctl start battery-status-led
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systemctl enable battery-status-led
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```
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The LED device can be changed by editing the systemd service file's line:
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```
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Environment="BATTERY_STATUS_LED_DEV=/sys/class/leds/input4\:\:capslock"
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```
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## Manual install on gentoo:
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```
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cd DIR
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git clone https://github.com/dmatetelki/battery-status-led
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cd /usr/local/portage/app-misc/
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ln -s DIR/battery-status-led/app-misc/battery-status-led battery-status-led
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ebuild battery-status-led-0.1.ebuild digest
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emerge battery-status-led
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```
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## Creating a debian package and installing it:
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```
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cd DIR
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git clone https://github.com/dmatetelki/battery-status-led
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cd battery-status-led/debian
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./package.deb
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sudo dpkg -i ./batterystatusled_0.1-1.deb
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```
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## Creating RPM package and installing it:
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```
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cd DIR
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git clone https://github.com/dmatetelki/battery-status-led
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cd battery-status-led/redhat
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./package.rpm
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sudo rpm -i ./battery-status-led-0.1-1.noarch.rpm
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```
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## Note:
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Did you know that the CapsLock key can be turned into another Ctrl?
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Add the following lines to `~/.Xmodmap` :
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```
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remove Lock = Caps_Lock
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keycode 0x42 = Control_L
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add Control = Control_L
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```
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#!/bin/bash
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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
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# under the terms of the GNU General Public License v3 as published by the Free
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# Software Foundation.
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# battery-status-led is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License v3 for
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# more details.
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# You should have received a copy of the GNU General Public License v3 along
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# with battery-status-led. If not, see
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# https://www.gnu.org/licenses/gpl-3.0.html.
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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_DEV=/sys/class/power_supply/BAT0/energy_full_design
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BAT_STATUS_DEV=/sys/class/power_supply/BAT0/status
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BAT_NOW_DEV=/sys/class/power_supply/BAT0/energy_now
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CAPSLOCK_LED_DEV=/sys/class/leds/input4\:\:capslock/brightness
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# If not set by the systemd service file
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LED_DEV=${BATTERY_STATUS_LED_DEV:-$CAPSLOCK_LED_DEV}
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BAT_FULL=$(cat $BAT_FULL_DEV)
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LED=0
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while :
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do
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# If charging, sleep 1m, then restart the cycle
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STATUS=$(cat $BAT_STATUS_DEV)
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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 $BAT_NOW_DEV)
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BAT_PCT=$(($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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# If battery is on low, but not crytical, flip LED every 2s
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if (( $BAT_PCT < $LOW )) && (( $BAT_PCT >= $CRIT)) ; then
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LED=$((1 ^ $LED))
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echo $LED > $LED_DEV
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sleep 2s
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continue
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fi
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# If battery is on crytical flip capslock LED every 0.5s
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if (( $BAT_PCT < $CRIT )) ; then
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LED=$((1 ^ $LED))
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echo $LED > $LED_DEV
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sleep 0.5s
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continue
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fi
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done
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@ -0,0 +1,38 @@
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.TH BATTERY-STATUS-LED 1 LOCAL
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.SH NAME
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.B battery-status-led
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\- Blink a LED on low battery
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.SH SYNOPSIS
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battery-status-led
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.SH DESCRIPTION
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Battery (low/critical) status indication by making a (the capslock) LED blink
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Takes no argument. To pick another LED device, edit
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.I /lib/systemd/system/battery-status-led.service
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and modify
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.I BATTERY_STATUS_LED_DEV
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to something else. The default value is
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.I /sys/class/leds/input4\:\:capslock
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.SH AUTHOR
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.MT denes.matetelki@gmail.com
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Denes Matetelki
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.ME
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.SH SEE ALSO
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Homepage:
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.UR https://github.com/dmatetelki/battery-status-led/
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.UE
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.br
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Copyright © 2018 Denes Matetelki.
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.br
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License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
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.br
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This is free software: you are free to change and redistribute it.
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.br
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There is NO WARRANTY, to the extent permitted by law.
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[Unit]
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Description=Battery monitoring on CapsLock LED
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[Service]
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Environment="BATTERY_STATUS_LED_DEV=/sys/class/leds/input4\:\:capslock"
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ExecStart="/usr/bin/battery-status-led.sh"
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Type=idle
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[Install]
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WantedBy=multi-user.target
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Name: battery-status-led
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Version: 0.1
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Release: 1%{?dist}
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URL: https://github.com/dmatetelki/battery-status-led
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Packager: Denes Matetelki <denes.matetelki@gmail.com>
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Summary: Battery status indication on an LED
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Group: Utilities
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License: GPLv3
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BuildArch: noarch
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Source0: battery-status-led.service
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Source1: battery-status-led
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Source2: README.md
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Source3: battery-status-led.1
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%description
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Battery (low/critical) status indication by making a (the caps-lock) LED blink
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# %prep
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%install
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mkdir -p %{buildroot}%{_unitdir}
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install -p -m 0644 %{SOURCE0} %{buildroot}%{_unitdir}
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mkdir -p %{buildroot}/%{_bindir}
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install -p -m 755 %{SOURCE1} %{buildroot}/%{_bindir}
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mkdir -p %{buildroot}/%{_docdir}/battery-status-led
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install -p -m 0644 %{SOURCE2} %{buildroot}%{_docdir}/battery-status-led/
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mkdir -p %{buildroot}/%{_mandir}/man1
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install -p -m 0644 %{SOURCE3} %{buildroot}%{_mandir}/man1/
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%clean
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rm -rf %{buildroot}
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%files
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%defattr(-,root,root,-)
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%{_unitdir}/battery-status-led.service
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%{_bindir}/battery-status-led
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%{_docdir}/battery-status-led/README.md
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%{_mandir}/man1/battery-status-led.1.*
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%changelog
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* Fri Aug 31 2018 Denes Matetelki <denes.matetelki@gmail.com> - 0.1-1
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- Initial release
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Loading…
Reference in new issue