69 lines
1.3 KiB
Bash
Executable File
69 lines
1.3 KiB
Bash
Executable File
#!/bin/bash
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#
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# Odroid HC4 fan control script
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#
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# Information (don't touch unless you're me)
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AUTHOR="david@socialnerds.org"
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VERSION="0.2.0"
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LICENSE="GPLv3"
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# Configuration
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THRESHOLD=45000
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DISTANCE=1000
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INTERVAL=10
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STEPS=(80 120 160 210 255)
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FAN="/sys/class/hwmon/hwmon2/pwm1"
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# Get all temperature readings and return the highest value
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function get_temp() {
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local TEMPS=($(cat /sys/devices/virtual/thermal/thermal_zone*/temp))
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local RESULT=${TEMPS[0]};
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for TEMP in ${TEMPS[@]}; do
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if [ $TEMP -gt $RESULT ]; then
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RESULT=$TEMP
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fi
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done
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echo $RESULT
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}
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# Get current fan speed
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function get_speed() {
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local SPEED=$(cat $FAN)
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echo $SPEED
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}
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# Set new fan speed
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function set_speed() {
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local CURRENT_SPEED=$(get_speed)
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local NEW_SPEED=$1
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if [ $CURRENT_SPEED -ne $NEW_SPEED ]; then
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echo $NEW_SPEED > $FAN
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sleep 3
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fi
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}
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# Set fan mode to manual
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echo "disabled" | tee /sys/class/thermal/thermal_zone{0,1}/mode > /dev/null
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# Run loop
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while true; do
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TEMP=$(get_temp)
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SPEED=$(get_speed)
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NEW_THRESHOLD=$THRESHOLD
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if [ $TEMP -gt $THRESHOLD ]; then
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for STEP in ${STEPS[@]}; do
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if [ $TEMP -gt $NEW_THRESHOLD ]; then
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NEW_THRESHOLD=$((NEW_THRESHOLD + DISTANCE))
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if [ $SPEED -lt $STEP ]; then
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set_speed $STEP
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fi
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fi
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done
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else
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set_speed 0
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fi
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sleep $INTERVAL
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done
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