Script to fix WIFI issues on the Raspberry Pi B+

raspberrypi_fix_wifi.sh

#!/bin/bash

# The raspberrypi would occasionally lose WIFI.
# The fix is to reset the interface manually or reboot the device.
#
# Script should be run as root and run every 5 min:
# crontab:
# */5 * * * * /root/bin/fix_wifi.sh

PATH="/sbin:$PATH"

ifconfig wlan0 | grep -q "inet addr:"
ret=$?
if [ $ret -ne 0 ] ; then
   logger 'WIFI connection down! Attempting reconnection.'
   ifdown --force wlan0
   sleep 10
   ifup --force wlan0
   sleep 10
fi