Script to reboot the raspberry pi if there is no network available

pi-reboot-on-network-failure

#!/bin/bash
while true
do
  wget -q --tries=10 --timeout=20 --spider http://google.com
  if [[ $? -eq 0 ]]; then
    echo "Online"
  else
    echo "Offline"
    echo raspberry | sudo -S sudo reboot
  fi
  sleep 300
done

Thanks @SandroMachado for giving me the base for what I needed. The changes needed for my situation were posed here:
https://gist.github.com/tblong/eec5ae1353f9ad9277845efc1760b4bb

I've updated @SandroMachado and @tblong's scripts to unload and reload the sdio driver, which resolves the network issue without rebooting the entire system: https://gist.github.com/adotagarwal/b6e4bb09e051638271fa3aff910f8eb4