Scan network with fping for connected devices

#!/bin/bash
interface='wlan0'
while true ; do
   if ifconfig $interface | grep -q "inet" ; then
      echo "Network is working"
      myip=$(ifconfig $interface | grep -E 'inet |inet:' | awk -F'[: ]+' '{ print $4 }')
      mynet=$(echo $myip | sed 's/\.[^.]*$//').0/24
      echo $mynet
      fping -c1 -g $mynet 2>/dev/null 1>/tmp/network.txt
      clients=0
      clients=$(wc -l < /tmp/network.txt)
      if [ "$clients" -gt 2 ]
      then
       echo $clients" connected clients:"
       cat /tmp/network.txt
      fi
      sleep 60
   else
      echo "No network."
      sleep 10
   fi
done