brightness lxde debian 10

brightnessDown.sh

#!/bin/sh

# create the file brightnessDown.sh and run
# chmod a+x brightnessDown.sh

ACTUAL=$(xrandr --verbose | grep -i brightness | cut -f2 -d ' ' | head -n1); 
echo "$ACTUAL";
RESULT="$ACTUAL"-0.1;
NEW_VALUE=$(echo "$RESULT" | bc);
RESULT=$(echo "0$NEW_VALUE");
echo "$RESULT";

# to get your connected monitor run 
# xrandr -q | grep connected
# and replace the return by 'eDP-1'
xrandr --output eDP-1 --brightness $RESULT

# put on your .config/openbox/lxde-rc.xml
#
#  <keybind key="XF86MonBrightnessDown">
#    <action name="Execute">
#    <command>~/brightnessDown.sh</command>
#    </action>
#  </keybind>
#

# openbox --reconfigure

brightnessUp.sh

#!/bin/sh

# create the file brightnessUp.sh and run
# chmod a+x brightnessUp.sh

ACTUAL=$(xrandr --verbose | grep -i brightness | cut -f2 -d ' ' | head -n1); 
echo "$ACTUAL";

comp=${ACTUAL%.*}; # Converts float to integer
if [ "$comp" -ge 1 ]; then
  echo "max brightness";
  return 0;
fi

RESULT="$ACTUAL"+0.1;
NEW_VALUE=$(echo "$RESULT" | bc);
RESULT=$(echo "0$NEW_VALUE");
echo "$RESULT";

# to get your monitor 'eDP-1' run
# xrandr -q | grep connected
# and replace the return by 'eDP-1'
xrandr --output eDP-1 --brightness $RESULT

# put on your .config/openbox/lxde-rc.xml
#
#  <keybind key="XF86MonBrightnessUp">
#    <action name="Execute">
#    <command>~/brightnessUp.sh</command>
#    </action>
#  </keybind>
#

# openbox --reconfigure