#!/bin/bash

if [ -z "$1" ] ; then
    IP=8.8.8.8
else
    IP=$1
fi

STATE=-1

while true ; do
    ping -c 1 -t 5 $IP > /dev/null

    STATUS=$?

    if [ $STATUS -ne $STATE ] ; then
    	STATE=$STATUS

	if [ $STATE -eq 0 ] ; then
	    echo $(date): Connnected to $IP
	else
	    echo $(date): Disconnected from $IP
	fi
    fi

    sleep 60
done