Quality=28/70 Signal level=-82 dBm
MAXLEVEL=$(grep -A 2 $WLNADDR /tmp/iwopen | grep 'Quality' | cut -f2 -d '-' | sort | head -n 1)
ESSID=$(grep -A 2 "$MAXLEVEL" /tmp/iwopen | grep ESSID | cut -f2 -d ':' | tr -d '"')
CHANNEL=$(grep -B 1 "$MAXLEVEL" /tmp/iwopen | grep Channel | cut -f2 -d ':')
iwconfig $IFACE essid $ESSID key off channel $CHANNEL