auto_change_fan_speed

#!/bin/bash

CPU_TEMP_TMP=`sensors | grep "Core 0" | cut -d'.' -f1`
CPU_TEMP=${CPU_TEMP_TMP:14:2}

FAN_SPEED=`expr "(" "$CPU_TEMP" "-" 38 ")" "*" 190`

echo $CPU_TEMP $FAN_SPEED

echo 1 | sudo tee /sys/devices/platform/applesmc.768/fan1_manual
echo $FAN_SPEED | sudo tee /sys/devices/platform/applesmc.768/fan1_output
echo 0 | sudo tee /sys/devices/platform/applesmc.768/fan1_manual