Linux raspberry experts (awk and shellscripting)

#killall -9 wpa_supplicant



iwlist wlan0 scanning > /tmp/wifiscan #save scan results to a temp file
scan_ok=$(grep "wlan" /tmp/wifiscan) #check if the scanning was ok with wlan0
if [ -z "$scan_ok" ]; then
    killall -9 wpa_supplicant
    iwlist wlan0-1 scanning > /tmp/wifiscan
fi
scan_ok=$(grep "wlan" /tmp/wifiscan) #check if the scanning was ok
if [ -z "$scan_ok" ]; then #if scan was not ok, finish the script
    echo -n "
WIFI scanning failed.
    
"
    exit
fi
if [ -f /tmp/ssids ]; then
    rm /tmp/ssids
fi
n_results=$(grep -c "ESSID:" /tmp/wifiscan) #save number of scanned cell
i=1
while [ "$i" -le "$n_results" ]; do
        if [ $i -lt 10 ]; then
                cell=$(echo "Cell 0$i - Address:")
        else
                cell=$(echo "Cell $i - Address:")
        fi
        j=`expr $i + 1`
        if [ $j -lt 10 ]; then
                nextcell=$(echo "Cell 0$j - Address:")
        else
                nextcell=$(echo "Cell $j - Address:")
        fi
        awk -v v1="$cell" '$0 ~ v1 {p=1}p' /tmp/wifiscan | awk -v v2="$nextcell" '$0 ~ v2 {exit}1' > /tmp/onecell #store only one cell info in a temp file

        ##################################################
        ## Uncomment following line to show mac address ##

        #oneaddress=$(grep " Address:" /tmp/onecell | awk '{print $5}')

        onessid=$(grep "ESSID:" /tmp/onecell | awk '{ sub(/^[ \t]+/, ""); print }' | awk '{gsub("ESSID:","");print}')
        oneencryption=$(grep "Encryption key:" /tmp/onecell | awk '{ sub(/^[ \t]+/, ""); print }' | awk '{gsub("Encryption key:on", "on");print}' | awk '{gsub("Encryption key:off", "off");print}')
        onepower=$(grep "Quality=" /tmp/onecell | awk '{ sub(/^[ \t]+/, ""); print }' | awk '{gsub("Quality=", "");print}' | awk -F '/70' '{print $1}')
        onepower=$(awk -v v3=$onepower 'BEGIN{ print v3 * 10 / 7}')
        onepower=${onepower%.*}
        
        if [ -n "$oneaddress" ]; then                                                                                                            
                echo "$onessid  $oneaddress $oneencryption $onepower" >> /tmp/ssids                                                              
        else                                                                                                                                     
                echo "-d SSID$i=$onessid -d Pass$i=$oneencryption -d Quality$i=$onepower -d Timestamp$i=$(date +'%T')" >> /tmp/ssids                                                                          
        fi
        i=`expr $i + 1`
done
rm /tmp/onecell
#awk '{printf("%5d %s\n",NR,$0)}' /tmp/ssids > /tmp/sec_ssids #add numbers at beginning of line
#grep ESSID /tmp/wifiscan | awk '{ sub(/^[ \t]+/, ""); print }' | awk '{printf("%5d : %s\n", NR,$0)}' | awk '{gsub("ESSID:", "");print}' > /tmp/ssids #generate file with only numbers and names

#replace new line in file with ampersands and then replace spaces  in network names with a dash (need to change this)
URL_string=$(sed ':a;N;$!ba;s/\n/ /g' < /tmp/ssids | sed s/\"//g) 
#| sed 's/ /-/g')

#echo "$URL_string"
#rm /tmp/ssids1
#echo $URL_string >> /tmp/ssids1


#cat /tmp/ssids1  #show ssids list

#echo "curl --silent -v -X POST $URL_string 'http://mysite/settings/wifi.php'"

Result=$(curl --silent -X POST $URL_string  'http://mysite/settings/get_wifi.php')
#curl --silent -v -X POST $URL_String  'http://mysite/settings/wifi.php'
#Result=$(curl --silent 'http://mysite/settings/wifi.php?'$URL_string)
echo $Result

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