opkg update
opkg install coreutils-od coreutils-tac

root@OpenWrt:~# sh -x  ./noipupdater.sh
+ dirname ./noipupdater.sh
+ cd .
+ pwd
+ CONFIGFILE=/root/config
+ [ -e /root/config ]
+ source /root/config
+ USERNAME=onken222
+ PASSWORD=xxxxxsssxx
+ HOST=izwq.costam.com
+ LOGDIR=/root/logs
+ FORCEUPDATEFREQ=864000
+ [ -z onken222 ]
+ [ -z xxxxxsssxx ]
+ USERAGENT=Bash No-IP Updater/0.9 onken222
+ sed s/ /%/g
+ tr -d \n
+ od -A n -t x1
+ echo -ne onken222
+ USERNAME=%74%6f%6d%61%73%7a%65%77%73%6b%69%2e%74%6f%6d%61%73%7a%40%79%61%6e%64%65%78%2e%63%6f%6d
+ sed s/ /%/g
+ tr -d \n
+ od -A n -t x1
+ echo -ne xxxxxsssxx
+ PASSWORD=%6d%61%64%7a%69%61%32%31%36%30
+ [[ 864000 =~ ^[0-9]+$ ]]
sh: =~: unknown operand
+ echo FORCEUPDATEFREQ has not been set correctly in the config file
FORCEUPDATEFREQ has not been set correctly in the config file
+ exit 1
root@OpenWrt:~#

' RESPONSE='good 37.47.65.154
++ tr -cd '[:print:]'
++ echo good $'37.47.65.154\r'
+ RESPONSE=
++ awk '{ print $1 }'
++ echo
+ RESPONSE_A=
+ case $RESPONSE_A in
+ LOGLINE='(error) Could not understand the response from No-IP. The DNS update server may be down.'
++ date '+%Y-%m-%d %H:%M:%S'
+ LOGDATE='[2016-06-20 11:44:04]'
+ echo 'IP: 37.47.65.154'
IP: 37.47.65.154
+ echo 37.47.65.154
+ echo '(error)' Could not understand the response from No-IP. The DNS update server may be down.
(error) Could not understand the response from No-IP. The DNS update server may be down.
+ echo '[2016-06-20 11:44:04] (error) Could not understand the response from No-IP. The DNS update server may be down.'
+ exit 0
root@OpenWrt:~#

fi
RESPONSE=$(curl -s -k --user-agent "$USERAGENT" "https://$USERNAME:$PASSWORD@dynupdate.no-ip.com/nic/update?hostname=$HOST&myip=$NEWIP")
RESPONSE=$(echo $RESPONSE | tr -cd "[:print:]")

RESPONSE_A=$(echo $RESPONSE | awk '{ print $1 }')
case $RESPONSE_A in
    "good")
        RESPONSE_B=$(echo $RESPONSE | awk '{ print $2 }')
        LOGLINE="(good) DNS hostname(s) successfully updated to $RESPONSE_B."
        ;;
    "nochg")
        RESPONSE_B=$(echo $RESPONSE | awk '{ print $2 }')
        LOGLINE="(nochg) IP address is current: $RESPONSE_B; no update performed."