wifi.sh

#!/bin/bash

# create adhoc network function
createAdHocNetwork(){
    echo "Creating ad-hoc network"
    ifconfig wlan0 down
    iwconfig wlan0 mode ad-hoc
    iwconfig wlan0 essid AccessPoint
    ifconfig wlan0 11.0.0.1 netmask 255.255.255.0 up
    echo "Ad-hoc network created"
}

# connect to wifi function
connect(){
    echo "Trying to connect to configured wifi"
    ifdown wlan0
    wpa_supplicant -B -i wlan0 -c /home/pi/pics/wpa_supplicant.conf
    ifup wlan0
    echo "Wifi configured"
}

echo "================================="
echo "Wifi setup"
echo "================================="
connect
echo "Checking connectivity..."
sleep 5s
ping -c 5 -I wlan0 google.com > /dev/null 2>&1
PINGSTATUS=$?
echo "Status"
echo $PINGSTATUS
if [ $PINGSTATUS -eq 0 ];
    then
        echo "Connected to WiFi"
    else
        echo "Wifi not connected, fallback to ad-hoc"
        createAdHocNetwork
fi

exit 0