#!/bin/sh
#
# Installation instructions:
#   - Place in /config/hashcheck.sh
#   - Set execute flag on file (chmod 0744)
#   - Create log file: touch /config/log.txt
#   - Create link to view from http: ln -s /config/log.txt /www/pages/.
#   - Run with: /config/hashcheck.sh &
#
# How to obtain log from http
#   - http://[ip of miner]/log.txt
#
# ADJUST THESE VARS ONLY --------------------------------------
#
restart=14400    #hours in seconds
#minhash=290000  #min hash rate 2900.00 ghs without the decimal
minhash=100000   #min hash rate 2900.00 ghs without the decimal
minfan=12        #min fan speed
maxfan=34        #max fan speed
mintemp=60       #min avg temp
maxtemp=65       #max avg temp
pwm=20           #starting pwm speed
maxloglines=70   #max log lines to save in file
#
#--------------------------------------------------------------

resetcgminer () {
    restartcount=$((restartcount+1))
    restarthash=$(cgminer-api | grep 'GHS 5s] => ' | cut -c 16-)
    elapsedtime=$E

    if [ "$1" = "1" ]; then
        logger "| applying new fan speed"
        sed -i "/bitmain-fan-pwm/c\"bitmain-fan-pwm\" : \"$pwm\"," /config/cgminer.conf
    fi

    logger "| restarting cgminer"
    /etc/init.d/cgminer.sh stop > /dev/null
    sleep 5
    /etc/init.d/cgminer.sh start > /dev/null

    logger "| miner restarted: $restarthash GH/s, $T1 $T2 $T3 deg ($T avg), up at $restarttime for $elapsedtime seconds"
    tailit
    sleep 60
}

getstats () {
    S=$(cgminer-api | grep 'GHS 5s] => ' | cut -c 16- | tr -d '.')
    E=$(cgminer-api summary | grep 'Elapsed]' | cut -c 17-)
    T=$(cgminer-api stats | grep 'temp_avg] =>' | cut -c 18-)
    T1=$(cgminer-api stats | grep 'temp1] =>' | cut -c 15-)
    T2=$(cgminer-api stats | grep 'temp2] =>' | cut -c 15-)
    T3=$(cgminer-api stats | grep 'temp3] =>' | cut -c 15-)
    HASH=$(cgminer-api | grep 'GHS 5s] => ' | cut -c 16-)
}

logger () {
    echo $(date +%Y-%m-%d:%H:%M:%S) "$1 " >> /config/log.txt
}

tailit () {
    tail -$maxloglines /config/log.txt > /config/log2.txt && cp /config/log2.txt /config/log.txt
}

rm /config/log.txt
touch /config/log.txt

logger "| hashcheck monitor started. reboot every $restart seconds or if hash lower than $minhash Ghs"
logger "| tempcheck monitor started"

restartcount=0
T=0
T1=0
T2=0
T3=0
PCT="%"

resetcgminer 1

sleep 60

while true
do
    getstats

    if [ $T1 -gt "75" ] || [ $T2 -gt "75" ] || [ $T3 -gt "75" ] && [ $pwm -lt "100" ]; then
        pwm=100
        logger "| failed too hot: setting fan to 100$PCT, $restarthash GH/s, $T1 $T2 $T3 deg ($T avg), $restartcount restarts"
        resetcgminer 1
        continue
   fi

   if [ $E -gt $restart ]; then
        logger "| miner scheduled restart: $restarthash GH/s, $T1 $T2 $T3 deg ($T AVG), up for $elapsedtime seconds"
        resetcgminer 0
        continue
   fi

   if [ -z "S$" ] || [ $S -eq "0" ]; then
        logger "| failed low hash: $restarthash GH/s, $T1 $T2 $T3 deg ($T avg), $restartcount restarts"
        resetcgminer 0
        continue
   fi


   if [ $S -lt $minhash ] && [ $E -gt "120" ]; then
        logger "| rechecking in 120s low hash: $HASH $T1 $T2 $T3 deg, $restartcount restarts"

        sleep 120

        getstats

        if [ $S -lt $minhash ]; then
            logger "| failed low hash: $restarthash GH/s, $T1 $T2 $T3 deg ($T avg), $restartcount restarts"
            resetcgminer 0
            continue
        else
            logger "| recovered: $HASH MH/s, $E seconds, $T1 $T2 $T3 deg ($T avg), $restartcount restarts"
        fi
   fi

   if [ $T -lt $mintemp ] && [ $pwm -gt $minfan ] && [ $E -gt "120" ]; then
        logger "| rechecking in 120s low temp: $HASH GH/s, $T1 $T2 $T3 deg ($T avg), $restartcount restarts"

        sleep 120

        getstats

        if [ $S -lt $minhash ]; then
            logger "| failed low hash: $restarthash GH/s, $T1 $T2 $T3 deg ($T avg), $restartcount restarts"
            resetcgminer 0
            continue
        else
            if [ $T -lt $mintemp ] && [ $pwm -gt $minfan ]; then
                pwm=$((pwm-2))
                logger "| failed too cold: setting fan to $pwm$PCT, $restarthash GH/s, $T1 $T2 $T3 deg ($T avg), $restartcount restarts"
                resetcgminer 1
                continue
            else
                logger "| recovered: $HASH GH/s, $E seconds, $T1 $T2 $T3 deg ($T avg)"
            fi
        fi
   fi

   if [ $T -gt $maxtemp ] && [ $pwm -lt $maxfan ] && [ $E -gt "120" ]; then
        pwm=$((pwm+2))
        logger "| failed too hot: setting fan to $pwm$PCT, $restarthash GH/s, $T1 $T2 $T3 deg ($T avg), $restartcount restarts"
        resetcgminer 1
        continue
   else
        logger "| normal operation: fan at $pwm$PCT, $HASH GH/s, $E seconds, $T1 $T2 $T3 deg ($T avg), $restartcount restarts"
   fi

   tailit

   sleep 60
done