Raspberry Pi Wifi Auto Reconnect
1. Go to /etc/ifplugd/action.d/ and rename the ifupdown file to ifupdown.original2. Then do: cp /etc/wpa_supplicant/ifupdown.sh ./ifupdown
3. Finally: sudo reboot
thank you http://raspberrypi.stackexchange.com/questions/4120/how-to-automatically-reconnect-wifi
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