BtWiFi_with_FON automatic login written as a bash script. I have this running every 10 minutes on my raspberry pi

relog.sh

#!/bin/bash

# CONF

DBG=true
RELOG_UNAME=your@email.com
RELOG_PASSW=xxxxxxxxxxxxxxx

# END CONF

IS_LOGGED_IN=$(wget "https://www.btopenzone.com:8443/home" --timeout 30 -O - 2>/dev/null | grep "accountLogoff")

if [ "$IS_LOGGED_IN" ]

then
  [[ $DBG ]] && echo "currently logged in. Nothing to do.."

else
  [[ $DBG ]] && echo "It's not logged in.. Will log in!"
  OUT=$(wget -qO- --post-data "USERNAME=$RELOG_UNAME&PASSWORD=$RELOG_PASSW" "https://btwifi.portal.fon.com/remote?res=hsp-login&HSPNAME=FonBT%3AGB&WISPURL=https%3A%2F%2Fwww.btopenzone.com%3A8443%2FfonLogon&WISPURLHOME=https%3A%2F%2Fwww.btopenzone.com%3A8443&VNPNAME=FonBT%3AGB&LOCATIONNAME=FonBT%3AGB")
  ONLINE=$(echo $OUT | grep youre_online )
  if [ "$ONLINE" ]
  then
    [[ $DBG ]] && echo "You're online!"
  else
    [[ $DBG ]] && echo "Could not login :("
  fi
fi

g0wfv commented on the original above https://gist.github.com/sscarduzio/05ed0b41d6234530d724
on Jun 21
Here's a subtly different version I wrote ...

#! /bin/bash

user=UsErNaMe
pass=PaSsWoRd

shopt -s extglob # enables pattern lists like +(...|...)
listOfESSID='+(BTFON|BTOpenzone|BTOpenzone-B|BTOpenzone-H|BTWi-fi|BTWifi|BTWiFI-with-FON|BTWifi-with-FON|_BTWi-fi)'
currentESSID=$(iwgetid | sed 's/."(.)".*/\1/g')

foo=$(wget "https://www.btopenzone.com:8443/home" --no-check-certificate --no-cache --timeout 30 -O - 2>/dev/null)

if [ $? -ne 0 ]
then
echo "Unable to reach btopenzone.com. Are you connected to the network?"
exit $?
fi

loggedIn=$(echo $foo | grep 'now logged on to BT Wi-fi')

if [ $? -eq 0 ]
then
echo "You're already logged in. Nowt to do!"
exit 0
else
echo -n "$currentESSID "
case "$currentESSID" in
$listOfESSID)
echo -n "is a valid Wifi network. Logging in ... "
foo=$(wget -qO - --no-check-certificate --no-cache --post-data "username=$user&password=$pass" "https://www.btopenzone.com:8443/tbbLogon")
loggedIn=$(echo $foo | grep 'now logged on to BT Wi-fi')

  if [ $? -eq 0 ]
  then
    echo "Success!"
    exit 0
  else
    echo "Oops!"
    exit 1
  fi
;;

*)
  echo "is not in the list of valid Wifi networks."
  exit 1

esac
fi

@jsavage I get the following error on your version:

sed: -e expression #1, char 15: invalid reference \1 on `s' command's RHS