NBMiner Checker Bash Script

nbminer-checker.sh

#!/bin/bash
# -----------------------------------------
# NBMiner Checker Script by
# Damien Gabrielson <gabrielsond@gmail.com>
# Requirements: wget curl jq bc
# -----------------------------------------
COUNTER=0
MAXBAD=5
STARTSECONDS=15
WAITSECONDS=3
HASHRATE=0
MINERAPI="http://0.0.0.0:22333/api/v1/status"
while : 
do
        HEADERS=$(wget --spider -S $MINERAPI 2>&1)
        if [[ $HEADERS == *"200 OK"* ]] ; then
                TEMPHASHRATE=$(curl -s $MINERAPI | jq -r ".miner.total_hashrate_raw")
                HASHARRAY=(${TEMPHASHRATE//./ })
                let HASHRATE=${HASHARRAY[0]}
                MEGAHASH=$(bc -l <<<"${HASHRATE}/1000000")
                printf "%8.6f M\n" "$MEGAHASH"
                let COUNTER=0
        else
                echo "miner is down"
                let COUNTER++
        fi

        if [ $COUNTER -eq $MAXBAD ] ; then
                echo "restart miner"
                let COUNTER=0
                sleep $STARTSECONDS
        else
                sleep $WAITSECONDS
        fi
done