quiet-fan

#!/bin/bash

#--- DEVICES
CPU_TEMP_DEVICE_CORE1=/sys/devices/platform/coretemp.0/hwmon/hwmon1/temp1_input
CPU_TEMP_DEVICE_CORE2=/sys/devices/platform/coretemp.0/hwmon/hwmon1/temp2_input
CPU_TEMP_DEVICE_CORE3=/sys/devices/platform/coretemp.0/hwmon/hwmon1/temp3_input
CPU_TEMP_DEVICE_CORE4=/sys/devices/platform/coretemp.0/hwmon/hwmon1/temp4_input

FAN_SPEED_DEVICE=/sys/devices/platform/nct6775.656/hwmon/hwmon3/pwm1
#--- END DEVICES

#--- CONFIGURATION SETTINGS
# Temperature at which we start ramping up the fan RPMs
CPU_TEMP_MAX=50

# Fans stop below a certain PWM setting. Make sure this is higher than that.
FAN_SPEED_MIN=60

# Timeout values for various states' waiting
HOLDING_TIMEOUT_AFTER_COOLING=60
HOLDING_TIMEOUT_AFTER_SEARCHING=300
COOLING_TIMEOUT_WHILE_COOLING=5
SEARCHING_TIMEOUT_WHILE_SEARCHING=30

# CPU load below which we'll try to search for lower fan speeds
# 80 corresponds to a load of 0.8
CPU_LOAD_THRESHOLD=80

# During searching, how much can the temp go up by before we bail?
ALLOWED_TEMP_INCREASE=3
#--- END CONFIGURATION SETTINGS


#--- MAIN

# Enable PWM
echo 1 > ${FAN_SPEED_DEVICE}_enable

SCRIPT_HOME=$(dirname $0)

. $SCRIPT_HOME/quiet-fan-lib.sh

STATE='holding'
set_timeout 2
set_fan 128

while true; do
    $STATE

    state_override

    printf "CPU: %s  FAN: %-5s  LOAD: %-4s  STATE: %-15s  TIMEOUT: %s  NOW: %s  COUNTDOWN: %s\n" "$(get_cpu_temp)" "$(get_fan)" "$(get_cpu_load)" "$STATE" "$TIMEOUT" "$(_get_now)" "$((TIMEOUT - $(_get_now)))"

    sleep 1

done