树莓派控制风扇脚本

#!/bin/bash

fan_pin=14

stop_fan() {
    gpioset --mode=signal pinctrl-bcm2711 $fan_pin=0 > /dev/null 2>&1 &
}

start_fan() {
    # echo "debug: 进程号是$gpioset_pid"
    kill -9 $gpioset_pid
}

while true;do
    cputemp=`cat /sys/class/thermal/thermal_zone0/temp`
    temp=$[ $cputemp/1000 ]
    # echo "debug: 当前温度是$temp"

    # 获取gpioset的进程号
    gpioset_pid=`procs --only PID --no-header "gpioset --mode=signal pinctrl-bcm2711 $fan_pin=0"`

    # 温度大于X度开启风扇
    if [[ $temp -ge 60 && -n $gpioset_pid ]];then
        # echo "debug: turning on the fan."
        start_fan
    fi
    # 温度小于X度关闭风扇
    if [[ $temp < 50 && -z $gpioset_pid ]];then
        # echo "debug: turning off the fan."
        stop_fan
    fi
    sleep 4
done

之后再配置个 cron 就可以了

@reboot /home/xiaobang/autoscript/casefan.sh