Scan WiFi using iwlist, get rid of those parts that we don't interested

wifi-scan

#!/bin/sh

IFS=''
sudo iwlist wlan0 scanning              |\
grep -E 'Quality|Cell|ESSID'            |\
while read line; do
        printf "%s" $line
        ISESSID=`echo $line | grep ESSID`
        [ "$ISESSID" ] && printf "\n"
done    |\
sed     -e 's/ \+/ /g'                  \
        -e 's/\w\+=//g'                 \
        -e 's/ Cell //'                 \
        -e 's/ - Address://'            \
        -e 's/ Signal//'                \
        -e 's/dBm ESSID://'