Dell 9020M Fan

cpu_fan.sh

#!/bin/bash

modprobe dell_smm_hwmon force=1

while true
do
    if [ `cat /sys/class/hwmon/hwmon1/temp1_input` -lt 55000 ]
    then 
        Vl=0
        echo "FAN L"
    elif [ `cat /sys/class/hwmon/hwmon1/temp1_input` -lt 70000 ]
    then
        Vl=64
        echo "FAN M"
    else
        Vl=192
        echo "FAN H"
    fi
    echo -n $Vl > /sys/class/hwmon/hwmon2/pwm1 2> /dev/null
    sleep 1 &
    wait
done