fixing typo adding new script and service example

I figure out how to proper pull haha sorry for the confusion

The darker mode, when the illuminance is less than 1 i.e. 0, it will go to the target brightness that is 1. The target can be easily changed.

If the file AB.offset have 0 as value. Darker mode is activated and setting brightness will reset to target value 1 when illuminance is less than 1. if the file has value of 1, it will be the normal mode and the screen brightness can be adjusted until the illuminance sensor changes.

easier to change variables and places and chmod 666 /tmp/AB.offset for the user to change modes when script is running as root (systemd service) darker mode as default with normal mode done by typing "echo 1 > /tmp/AB.offset"

they are in autobrightness.sh

autobrightness.sh

@@ -0,0 +1,171 @@
+#!/bin/bash
+
+#variables to run
+
+#decrease cpu usage
+Priority=19 # CPU limit, adjust as needed
+
+# How much light change must be seen by the sensor before it will act
+LightChange=10
+
+# How often it checks the sensor
+SensorDelay=1
+
+# Scale sensor to display brightness range
+SensorToDisplayScale=24
+
+# This should match your refresh rate otherwise it will either change the backlight more times than needed or too few for a smooth animation
+LevelSteps=60
+
+# The is should match the LevelSteps but in the actual time each event should take to see
+AnimationDelay=0.016
+
+# Read the variable names
+MaxScreenBrightness=937
+MinimumBrightness=1
+
+# 2 : Default | 1 : Add Offset | 0 : Subtract Offset, Recommended not to change
+op=2
+
+#place where you get the brightness of the monitor being controled and the sensor of brightness
+MonitorBrightness=/sys/class/backlight/intel_backlight/brightness
+
+AnbientSensorIlluminance=/sys/bus/iio/devices/iio:device5/in_illuminance_raw
+
+#Normal Mode, if the file offset is set to 1. Darker Mode if set to 0
+# the offset file in /tmp/AB.offset will start with 0 so darker mode is default
+# setting to 1 will enable normal mode. (darker mode ignores brightness set if iluminance is 0 and will set display to actual_brightness=1
+
+# Function to smoothly decrease brightness
+#darker mode
+smoothly_decrease_brightness() {
+  current_brightness=$(cat $MonitorBrightness)
+  target_brightness=1   # can be set to 0 or more when illuminance is 0.
+
+  steps=60  # You can adjust the number of steps for smoother transition
+  animation_delay=0.016
+
+  diff_count=$((($target_brightness - $current_brightness) / $steps))
+
+  for ((i = 1; i <= $steps; i++)); do
+    new_brightness=$((current_brightness + i * diff_count))
+    brightnessctl -q s $new_brightness
+    sleep $animation_delay
+  done
+
+  # Set the final brightness value
+  brightnessctl -q s $target_brightness
+}
+
+while getopts i:d: flag; do
+  case "${flag}" in
+    i) op=1
+       num=${OPTARG};;
+    d) op=0 
+       num=${OPTARG};;
+  esac
+done
+
+if [[ -f /tmp/AB.offset ]]; then
+  OffSet=$(cat /tmp/AB.offset)
+else
+  OffSet=0
+  echo $OffSet > /tmp/AB.offset
+  chmod 666 /tmp/AB.offset
+fi
+
+OffSet=$((OffSet < 0 ? 0 : OffSet))
+
+if [[ $op -lt 2 ]]; then
+  if [[ $op -eq 1 ]]; then
+    OffSet=$((OffSet + num))
+  else 
+    OffSet=$((OffSet - num))
+  fi
+
+  OffSet=$((OffSet < 0 ? 0 : OffSet))
+  echo $OffSet > /tmp/AB.offset
+  chmod 666 /tmp/AB.offset
+  exit
+fi
+
+
+# Set the priority of the current script and says it is running
+renice "$Priority" "$$"
+touch '/tmp/AB.running'
+
+
+OldLight=$(cat $AnbientSensorIlluminance)
+
+until [ -f /tmp/AB.kill ]; do
+  if [[ -f /tmp/AB.stop ]]; then
+    rm '/tmp/AB.stop'
+    rm '/tmp/AB.running'
+
+    until [[ -f /tmp/AB.start ]]; do
+      sleep 10
+    done
+
+    rm '/tmp/AB.start'
+    touch '/tmp/AB.running'
+  else
+    if [[ -f /tmp/AB.offset ]]; then
+      OffSet=$(cat /tmp/AB.offset)
+    else
+      OffSet=0
+      echo $OffSet > /tmp/AB.offset
+      chmod 666 /tmp/AB.offset
+    fi
+
+    Light=$(cat $AnbientSensorIlluminance)
+    Light=$((Light + OffSet))
+
+    if [[ $Light -lt $LightChange ]]; then
+      MaxOld=$((OldLight + LightChange))
+      MinOld=$((OldLight - LightChange))
+    else
+      MaxOld=$((OldLight + OldLight/LightChange))
+      MinOld=$((OldLight - OldLight/LightChange))
+    fi
+
+    if [[ $Light -gt $MaxOld ]] || [[ $Light -lt $MinOld ]]; then
+      CurrentBrightness=$(cat $MonitorBrightness)
+      Light=$(( $Light + $MinimumBrightness ))
+      TempLight=$(($Light * $SensorToDisplayScale))
+
+      if [[ $TempLight -gt $MaxScreenBrightness ]]; then
+        NewLight=$MaxScreenBrightness
+      else
+        NewLight=$TempLight
+      fi
+
+      DiffCount=$(( ($NewLight - $CurrentBrightness)/$LevelSteps ))
+
+      for i in $(eval echo {1..$LevelSteps}); do
+        NewLight=$(( $DiffCount ))
+
+        if [[ $NewLight -lt 0 ]]; then
+          NewLight=$( echo "$NewLight" | awk -F "-" {'print$2'})
+          NewLight=$(echo $NewLight-)
+        else
+          NewLight=$(echo +$NewLight)
+        fi
+
+        brightnessctl -q s $NewLight
+        sleep $AnimationDelay
+      done
+
+      OldLight=$Light
+    fi
+
+#darker mode activated
+    if [[ $Light -lt 1 ]]; then
+      smoothly_decrease_brightness
+    fi
+
+    sleep $SensorDelay
+  fi
+done
+
+rm '/tmp/AB.running'
+rm '/tmp/AB.kill'