cgminer-fan.sh

#!/bin/sh
FAN_FORCE=0;
if [ -n $1 ]; then
  FAN_FORCE=$1;
fi;
FAN_MIN=33;
FAN_LOW=42;
FAN_MAX=100;
CELSIUS_LOW=69;
CELSIUS_MAX=75;
CELSIUS_DIE=78;
DELAY=121;
while true; do
  if [ $(ps | grep "cgminer " | grep -v 'grep cgminer' | wc -l) -gt 0 ]; then
    temp1=$(cgminer-api stats | grep temp1] | awk '{print $3}');
    temp2=$(cgminer-api stats | grep temp2] | awk '{print $3}');
    fan1=$(cgminer-api stats | grep fan1] | awk '{print $3}');
    pwm=$(grep bitmain-fan-pwm /config/cgminer.conf | awk '{print $3}' | sed -e 's/[[:punct:]]//g');
    if [ -z $temp1 ]; then
      echo -n "ZOMBIE at " && date;
    else
      maxtemp=$(( $temp1 > $temp2 ? $temp1 : $temp2 ));
      echo -n "TEMP: $maxtemp ($temp1:$temp2), FAN: $fan1 ($pwm%) at " && date;
      FAN_MOD=0;
      if [ "$FAN_FORCE" -eq "$FAN_FORCE" ] 2>/dev/null && [ $FAN_FORCE -gt $FAN_MIN ]; then
        FAN_MOD=$FAN_FORCE;
      elif [ "$FAN_FORCE" -eq "$FAN_FORCE" ] 2>/dev/null && [ $FAN_FORCE -gt 0 ]; then
        echo "SET $FAN_FORCE% ignored because is less than $FAN_MIN%." && exit;
      else
        if [ $maxtemp -gt $CELSIUS_DIE ]; then
          FAN_MOD=-1;
        elif [ $maxtemp -gt $CELSIUS_MAX ]; then
          test $pwm -ne $FAN_MAX && FAN_MOD=$FAN_MAX;
        elif [ $maxtemp -gt $CELSIUS_LOW ]; then
          test $pwm -ne $FAN_LOW && FAN_MOD=$FAN_LOW;
        else
          test $pwm -ne $FAN_MIN && FAN_MOD=$FAN_MIN;
        fi;
      fi;
      if [ $FAN_MOD -lt 0 ]; then
        echo -n "DIE at " && date && \
        /etc/init.d/cgminer.sh stop > /dev/null;
        echo 1 > /sys/class/gpio/gpio20/value && \
        sleep 3 && \
        echo 0 > /sys/class/gpio/gpio20/value;
      elif [ $FAN_MOD -gt 0 ]; then
        sed -i "/bitmain-fan-pwm/c\"bitmain-fan-pwm\" : \"$FAN_MOD\"," /config/cgminer.conf  && \
        echo -n "SET $FAN_MOD% at " && date && \
        /etc/init.d/cgminer.sh restart > /dev/null;
        test $pwm -lt $FAN_MOD && \
        echo 1 > /sys/class/gpio/gpio20/value && \
        sleep 1 && \
        echo 0 > /sys/class/gpio/gpio20/value;
        test "$FAN_FORCE" -eq "$FAN_FORCE" 2>/dev/null && test $FAN_FORCE -gt 0 && exit;
      fi;
    fi;
  else
    echo -n "DEATH at " && date;
  fi;
  sleep $DELAY;
done;