PINE64

Hi,

I wrote a script to control my fan.
The fan speed is controlled by the temp of the CPU.
I'm pretty new to bash so I'm hoping for some feedback and off course is everybody free to use the script how they like. Big Grin

Code:
#!/bin/bash

#MikeD

#Automatic fan on cpu temp

CHECK_TIME=10 #IN SEC

function pwm(){

LOOP=0

while [ $LOOP -lt $(($CHECK_TIME*75)) ]; do

        echo 1 > /sys/class/gpio/gpio82/value

        sleep $1

        echo 0 > /sys/class/gpio/gpio82/value

        sleep $2

        LOOP=$(($LOOP+1))

done

}

function fanOff()

{

echo 0 > /sys/class/gpio/gpio82/value

sleep $CHECK_TIME

}

function fanTweFiv()

{

pwm .0025 .0075

}

function fanFifty()

{

pwm .0050 .0050

}

function fanSevFiv()

{

pwm .0075 .0025

}

function fanFull()

{

echo 1 > /sys/class/gpio/gpio82/value

sleep $CHECK_TIME

}

while [ 1 ]; do

        TEMP=$(cat /sys/class/thermal/thermal_zone0/temp)

        if [ $TEMP -le 20000 ]

        then

                fanOff

        fi

        if [ $TEMP -gt 20000  -a  $TEMP -le 35000 ]

        then

                fanTweFiv

        fi

        if [ $TEMP -gt 35000 -a $TEMP -le 50000 ]

        then

                fanFifty

        fi

        if [ $TEMP -gt 50000 -a $TEMP -le 65000 ]

        then

                fanSevFiv

        fi

        if [ $TEMP -gt 65000 ]

        then

                fanFull

        fi

done

Thx in advance Smile

Hey there, how is this script holding up today? Has anyone been using it?

Can't get it to work:

./fantemp.sh: line 10: /sys/class/gpio/gpio82/value: No such file or directory
./fantemp.sh: line 12: /sys/class/gpio/gpio82/value: No such file or directory

I have these gpio's:

rock64@rock64:/sys/class/gpio$ ls
export gpiochip0 gpiochip32 gpiochip510 gpiochip64 gpiochip96 unexport

mikedhoore

va88

va88