Fancontrol

This program monitors temperatures of both system and hard drives and changes fan speeds accordingly.

C program fwcontrol.c

# Configuration file for fwcontrol
#
# Parameter         Value         Description
# ================+=============+===============================================
# control_by_sys  | 0 or 1      | If set to 1 the fan is controlled by system
#                 |             | temperatures like CPU/GPU or other internal
#                 |             | sensors.
# control_by_hdd  | 0 or 1      | If set to 1 the fan is controlled by hard
#                 |             | drive temperatures.
# pwm_enable      | filename    | Used to set the fan mode.
# pwm_write       | filename    | Used to change the fan speed.
# sys_input       | filename(s) | Defines which system temperature sensors
#                 |             | should be checked. Values can be written comma
#                 |             | separated and/or in multiple lines:
#                 |             | sys_input=/path1/filename1,/path2/filename2...
#                 |             | sys_input=/path6/filename6,/path7/filename7...
#                 |             | ...
# temp_pwm_sys    | temp,pwm    | Defines the PWM value for a given system
#                 |             | temperature: temp1,pwm1,temp2,pwm2,...
# interpolate_sys | 0 or 1      | If set to 1 the program calculates
#                 |             | intermediate values between the data points
#                 |             | defined in "temp_pwm_sys".
# hyst_sys        | temp        | System temperature must be decreased by at
#                 |             | least this value until fan speed can be
#                 |             | reduced.
# scan_hdd        | device(s)   | Defines which hard drives should be checked.
#                 |             | Values can be written comma separated and/or
#                 |             | in multiple lines:
#                 |             | scan_hdd=/dev/<hdd1>,/dev/<hdd2>...
#                 |             | scan_hdd=/dev/<hhd6>,/dev/<hdd7>...
#                 |             | ...
# temp_pwm_hdd    | temp,pwm    | Defines the PWM value for a given hard drive
#                 |             | temperature: temp1,pwm1,temp2,pwm2,...
# interpolate_hdd | 0 or 1      | If set to 1 the program calculates
#                 |             | intermediate values between the data points
#                 |             | defined in "temp_pwm_hdd".
# hyst_hdd        | temp        | Hard drive temperature must be decreased by at
#                 |             | least this value until fan speed can be
#                 |             | reduced.
# decrease_delay  | seconds     | Defines how many seconds must have passed
#                 |             | since last speed increase until the speed can
#                 |             | be decreased.
# stop_delay      | seconds     | Defines how many seconds must have passed
#                 |             | since start of the fan until the fan can be
#                 |             | stopped.
# idle_pwm        | 0-255       | If the fan should be stopped but stop delay
#                 |             | time has not yet passed, then the fan speed
#                 |             | is set to this value.
# error_pwm_sys   | 0-255       | If something goes wrong when reading the
#                 |             | system temperatures then the fan speed is set
#                 |             | to this value (default is 255).
# error_pwm_hdd   | 0-255       | If something goes wrong when reading the hard
#                 |             | drive temperatures then the fan speed is set
#                 |             | to this value (default is 255).
# interval_sys    | seconds     | Check system temperatures every n seconds.
# interval_hdd    | seconds     | Check hard drive temperatures every n seconds.
# loglevel        | 0 or 1      | If set to 1 then every speed change will be
#                 |             | written to the logfile.
# ================+=============+===============================================
[CPU Cooler]
control_by_sys=1
control_by_hdd=0
pwm_enable=/sys/class/hwmon/hwmon2/pwm2_enable
pwm_write=/sys/class/hwmon/hwmon2/pwm2
sys_input=/sys/class/hwmon/hwmon1/temp1_input
temp_pwm_sys=0,20,29,20,30,40,41,40,61,200,70,255
interpolate_sys=1
hyst_sys=4
decrease_delay=30
stop_delay=120
idle_pwm=20
interval_sys=3
loglevel=1

[Front left]
control_by_sys=1
control_by_hdd=1
pwm_enable=/sys/class/hwmon/hwmon2/pwm3_enable
pwm_write=/sys/class/hwmon/hwmon2/pwm3
sys_input=/sys/class/hwmon/hwmon1/temp1_input
scan_hdd=/dev/sdb
temp_pwm_sys=0,108,44,144,48,186,60,255
temp_pwm_hdd=35,108,36,144,37,186,38,228,39,255
interpolate_sys=0
interpolate_hdd=0
hyst_sys=4
hyst_hdd=2
decrease_delay=30
stop_delay=120
idle_pwm=78
interval_sys=15
interval_hdd=60
loglevel=1

[Front right]
control_by_sys=1
control_by_hdd=1
pwm_enable=/sys/class/hwmon/hwmon2/pwm4_enable
pwm_write=/sys/class/hwmon/hwmon2/pwm4
sys_input=/sys/class/hwmon/hwmon1/temp1_input
scan_hdd=/dev/sdc,/dev/sdd,/dev/sde,/dev/sdf
temp_pwm_sys=60,255
temp_pwm_hdd=34,120,35,138,36,156,37,178,38,222,39,255
interpolate_sys=0
interpolate_hdd=0
hyst_sys=4
hyst_hdd=2
decrease_delay=30
stop_delay=120
idle_pwm=78
interval_sys=15
interval_hdd=60
loglevel=1

[Rear left]
control_by_sys=1
control_by_hdd=1
pwm_enable=/sys/class/hwmon/hwmon2/pwm1_enable
pwm_write=/sys/class/hwmon/hwmon2/pwm1
sys_input=/sys/class/hwmon/hwmon1/temp1_input
scan_hdd=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde,/dev/sdf
temp_pwm_sys=0,80,42,88,46,106,50,146,54,218,60,255
temp_pwm_hdd=36,106,37,146,38,192,39,255
interpolate_sys=0
interpolate_hdd=0
hyst_sys=4
hyst_hdd=2
decrease_delay=30
stop_delay=120
idle_pwm=80
interval_sys=15
interval_hdd=60
loglevel=1

[Rear right]
control_by_sys=1
control_by_hdd=1
pwm_enable=/sys/class/hwmon/hwmon2/pwm5_enable
pwm_write=/sys/class/hwmon/hwmon2/pwm5
sys_input=/sys/class/hwmon/hwmon1/temp1_input
scan_hdd=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde,/dev/sdf
temp_pwm_sys=0,78,42,86,46,104,50,142,54,210,60,255
temp_pwm_hdd=36,104,37,142,38,188,39,255
interpolate_sys=0
interpolate_hdd=0
hyst_sys=4
hyst_hdd=2
decrease_delay=30
stop_delay=120
idle_pwm=78
interval_sys=15
interval_hdd=60
loglevel=1

Configuration file /etc/fwcontrol.conf

# Configuration file for fwcontrol
#
# Parameter         Value         Description
# ================+=============+===============================================
# control_by_sys  | 0 or 1      | If set to 1 the fan is controlled by system
#                 |             | temperatures like CPU/GPU or other internal
#                 |             | sensors.
# control_by_hdd  | 0 or 1      | If set to 1 the fan is controlled by hard
#                 |             | drive temperatures.
# pwm_enable      | filename    | Used to set the fan mode.
# pwm_write       | filename    | Used to change the fan speed.
# sys_input       | filename(s) | Defines which system temperature sensors
#                 |             | should be checked. Values can be written comma
#                 |             | separated and/or in multiple lines:
#                 |             | sys_input=/path1/filename1,/path2/filename2...
#                 |             | sys_input=/path6/filename6,/path7/filename7...
#                 |             | ...
# temp_pwm_sys    | temp,pwm    | Defines the PWM value for a given system
#                 |             | temperature: temp1,pwm1,temp2,pwm2,...
# interpolate_sys | 0 or 1      | If set to 1 the program calculates
#                 |             | intermediate values between the data points
#                 |             | defined in "temp_pwm_sys".
# hyst_sys        | temp        | System temperature must be decreased by at
#                 |             | least this value until fan speed can be
#                 |             | reduced.
# scan_hdd        | device(s)   | Defines which hard drives should be checked.
#                 |             | Values can be written comma separated and/or
#                 |             | in multiple lines:
#                 |             | scan_hdd=/dev/<hdd1>,/dev/<hdd2>...
#                 |             | scan_hdd=/dev/<hhd6>,/dev/<hdd7>...
#                 |             | ...
# temp_pwm_hdd    | temp,pwm    | Defines the PWM value for a given hard drive
#                 |             | temperature: temp1,pwm1,temp2,pwm2,...
# interpolate_hdd | 0 or 1      | If set to 1 the program calculates
#                 |             | intermediate values between the data points
#                 |             | defined in "temp_pwm_hdd".
# hyst_hdd        | temp        | Hard drive temperature must be decreased by at
#                 |             | least this value until fan speed can be
#                 |             | reduced.
# decrease_delay  | seconds     | Defines how many seconds must have passed
#                 |             | since last speed increase until the speed can
#                 |             | be decreased.
# stop_delay      | seconds     | Defines how many seconds must have passed
#                 |             | since start of the fan until the fan can be
#                 |             | stopped.
# idle_pwm        | 0-255       | If the fan should be stopped but stop delay
#                 |             | time has not yet passed, then the fan speed
#                 |             | is set to this value.
# error_pwm_sys   | 0-255       | If something goes wrong when reading the
#                 |             | system temperatures then the fan speed is set
#                 |             | to this value (default is 255).
# error_pwm_hdd   | 0-255       | If something goes wrong when reading the hard
#                 |             | drive temperatures then the fan speed is set
#                 |             | to this value (default is 255).
# interval_sys    | seconds     | Check system temperatures every n seconds.
# interval_hdd    | seconds     | Check hard drive temperatures every n seconds.
# loglevel        | 0 or 1      | If set to 1 then every speed change will be
#                 |             | written to the logfile.
# ================+=============+===============================================
[CPU Cooler]
control_by_sys=1
control_by_hdd=0
pwm_enable=/sys/class/hwmon/hwmon2/pwm2_enable
pwm_write=/sys/class/hwmon/hwmon2/pwm2
sys_input=/sys/class/hwmon/hwmon1/temp1_input
temp_pwm_sys=0,20,29,20,30,40,41,40,90,255
interpolate_sys=1
hyst_sys=4
decrease_delay=30
stop_delay=120
idle_pwm=20
interval_sys=3
loglevel=1

[Front left]
control_by_sys=1
control_by_hdd=1
pwm_enable=/sys/class/hwmon/hwmon2/pwm3_enable
pwm_write=/sys/class/hwmon/hwmon2/pwm3
sys_input=/sys/class/hwmon/hwmon1/temp1_input
scan_hdd=/dev/sdb
temp_pwm_sys=0,78,30,104,41,104,90,255
temp_pwm_hdd=35,104,39,255
interpolate_sys=1
interpolate_hdd=1
hyst_sys=4
hyst_hdd=2
decrease_delay=30
stop_delay=120
idle_pwm=78
interval_sys=15
interval_hdd=60
loglevel=1

[Front right]
control_by_sys=1
control_by_hdd=1
pwm_enable=/sys/class/hwmon/hwmon2/pwm4_enable
pwm_write=/sys/class/hwmon/hwmon2/pwm4
sys_input=/sys/class/hwmon/hwmon1/temp1_input
scan_hdd=/dev/sdc,/dev/sdd,/dev/sde,/dev/sdf
temp_pwm_sys=55,110,90,255
temp_pwm_hdd=33,104,37,255
interpolate_sys=1
interpolate_hdd=1
hyst_sys=4
hyst_hdd=2
decrease_delay=30
stop_delay=120
idle_pwm=78
interval_sys=15
interval_hdd=60
loglevel=1

[Rear left]
control_by_sys=1
control_by_hdd=1
pwm_enable=/sys/class/hwmon/hwmon2/pwm1_enable
pwm_write=/sys/class/hwmon/hwmon2/pwm1
sys_input=/sys/class/hwmon/hwmon1/temp1_input
scan_hdd=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde,/dev/sdf
temp_pwm_sys=0,80,41,80,90,255
temp_pwm_hdd=35,104,38,255
interpolate_sys=1
interpolate_hdd=1
hyst_sys=4
hyst_hdd=2
decrease_delay=30
stop_delay=120
idle_pwm=80
interval_sys=15
interval_hdd=60
loglevel=1

[Rear right]
control_by_sys=1
control_by_hdd=1
pwm_enable=/sys/class/hwmon/hwmon2/pwm5_enable
pwm_write=/sys/class/hwmon/hwmon2/pwm5
sys_input=/sys/class/hwmon/hwmon1/temp1_input
scan_hdd=/dev/sdb,/dev/sdc,/dev/sdd,/dev/sde,/dev/sdf
temp_pwm_sys=0,80,41,80,90,255
temp_pwm_hdd=35,104,38,255
interpolate_sys=1
interpolate_hdd=1
hyst_sys=4
hyst_hdd=2
decrease_delay=30
stop_delay=120
idle_pwm=80
interval_sys=15
interval_hdd=60
loglevel=1

Start fwcontrol during boot

Option 1: Using init script /etc/init.d/fwcontrol

#! /bin/sh

### BEGIN INIT INFO
# Provides:             fwcontrol
# Required-Start:       $syslog $remote_fs
# Required-Stop:        $syslog $remote_fs
# Default-Start:        2 3 4 5
# Default-Stop:
# Short-Description:    fwcontrol
# Description:          Control of fan speeds
### END INIT INFO

NAME="fwcontrol"
DESC="Control of fan speeds"
DAEMON=/usr/sbin/${NAME}
FWUSER=root

PATH=/sbin:/bin:/usr/sbin:/usr/bin

test -f $DAEMON || exit 0

mkdir -p /var/run
PIDFILE=/var/run/${NAME}.pid

RETVAL=0
case "$1" in
   start)
      echo -n "Starting ${DESC}: "
      start-stop-daemon --start --oknodo --quiet --background --make-pidfile --pidfile ${PIDFILE} --chuid ${FWUSER} --exec ${DAEMON}
      RETVAL=$?
      echo "${NAME}"
      ;;
   stop)
      echo -n "Stopping ${DESC}: "
      start-stop-daemon --stop --oknodo --quiet --pidfile ${PIDFILE} --remove-pidfile --chuid ${FWUSER} --exec ${DAEMON}
      RETVAL=$?
      echo "${NAME}"
      ;;
   restart|force-reload)
      $0 stop
      sleep 5
      $0 start
      RETVAL=$?
      ;;
   *)
      echo "Usage: /etc/init.d/${NAME} {start|stop|restart|force-reload}" >&2
      exit 1
      ;;
esac
exit $RETVAL

Option 2: Using systemd service /etc/systemd/system/fwcontrol.service

[Unit]
Description=fwcontrol daemon

[Service]
Type=simple
Restart=on-failure
ExecStartPre=-/bin/bash -c '/usr/bin/killall -q fwcontrol; exit 0'
ExecStart=/usr/sbin/fwcontrol
ExecStop=/usr/bin/killall fwcontrol

[Install]
WantedBy=multi-user.target

Logfile Configuration

File /etc/rsyslog.d/10-fwcontrol.conf:

local0.*                        /var/log/fwcontrol.log
& stop

Logfile rotation configured in file /etc/logrotate.d/fwcontrol:

/var/log/fwcontrol.log {
        weekly
        rotate 4
        compress
        delaycompress
        notifempty
        missingok
}