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autoconnect.sh
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autoconnect.sh
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#!/bin/sh
# This file is designed to make the AR Drone 2.0 connect to a spesified
# infrastructure network. Settings are at the top of the script.
# In brief the script makes the drone check if it is on the infrastrcutre
# If it is on that connections check if it is in range, otherwise switch
# parrot's default.
# If it is not, which means it is on default parrot, than checks if there
# are any incoming connections. If there aren't tries again ifrastructure.
# Has 2 timeouts - one for the timeout between loops, and one for waiting
# for connection after switching to parrot's default
# Find absolute path to this script
SCRIPT=`readlink -f $0`
INSTALL_PATH=`dirname $SCRIPT`
LOG=$INSTALL_PATH/log
# Settings
ESSID=voyager2.0
IP=192.168.1.25
NETMASK=255.255.255.0
TIMEOUT=30
TIMEOUT_DISCONNECT=30
# ARDrone default addresses
BASE_ADDRESS=192.168.1.
LAST_NUMBER="2 3 4 5"
CONNECTED=0
# Retrieving ad-hoc ssid to restore the network
DRONESSID=`grep ssid_single_player /data/config.ini | awk -F "=" '{print $2}'`
# Removing leading and trailing spaces
DRONESSID=`echo $DRONESSID`
if [ -n "$DRONESSID" ]
then
echo "Found drone ssid =$DRONESSID"
else
# Default SSID.
DRONESSID=ardrone_wifi
fi
echo "Network configuration" > $LOG
echo "Drone SSID : $DRONESSID" >> $LOG
echo "Access Point ESSID : $ESSID" >> $LOG
echo "Infrastructure IP address : $IP" >> $LOG
echo "Infrastructure Netmask : $NETMASK" >>$LOG
echo "Timeout : $TIMEOUT" >>$LOG
echo "Disconnection extra timeout : $TIMEOUT_DISCONNECT" >>$LOG
while [ 1 ]
do
CONFIG=`iwconfig ath0`
# First check if we are connected to infrastructure and it is in range
if `echo $CONFIG | grep -q $ESSID` ;
then
# if ping -W 1 -c 1 -q $IP ;
# Signal level:-96 dBm indicates we lost the signal in managed mode (this is the lowest value)
if `echo $CONFIG | grep -q "Signal level:-96 dBm"` ;
then
echo "Restoring default drone network with SSID $DRONESSID" >> $LOG
killall udhcpc
udhcpd /tmp/udhcpd.conf
ifconfig ath0 down
iwconfig ath0 mode Master essid $DRONESSID channel auto commit
ifconfig ath0 192.168.1.1 netmask 255.255.255.0 up
sleep $TIMEOUT_DISCONNECT
else
echo "Connected to $ESSID" >> $LOG
fi
else
# If we are connected to the default network check if anyone connected
CONNECTED=0
for i in $LAST_NUMBER
do
if ping -W 1 -c 1 -q $BASE_ADDRESS$i ;
then
CONNECTED=1
echo "Address $BASE_ADDRESS$i connected to default" >> $LOG
break
fi
done
# If noone connected try again infrastructure
if [ "$CONNECTED" -eq 0 ] ;
then
echo "Switching to Managed mode with ESSID : $ESSID" >> $LOG
killall udhcpd
ifconfig ath0 down
iwconfig ath0 mode Managed essid $ESSID ap any channel auto commit
if [ -n "$IP" ];
then
echo "Using settings: $IP $NETMASK" >> $LOG
ifconfig ath0 $IP netmask $NETMASK up
else
echo "Using DHCP settings" >> $LOG
ifconfig ath0 up
udhcpc -b -i ath0 >> $LOG
fi
fi
fi
sleep $TIMEOUT
done