Wifi Dongol for RaspberryPi

NewUpdate 18th Sep 2014:

this is for kernel 3.12.28+

sudo cp rtl8188eufw.bin /lib/firmware/rtlwifi
sudo install -p -m 644 8188eu.ko /lib/modules/3.12.28+/kernel/drivers/net/wireless
sudo insmod /lib/modules/3.12.28+/kernel/drivers/net/wireless/8188eu.ko
sudo depmod -a


Buy wifi usb:
ebay

Software:

You need internet connection to complete this step.
DropBox

If you’re using Raspbian, and you’ve not installed Wicd-curses just type:
sudo apt-get update
sudo apt-get install wicd-curses

you can try this:

sudo nano /etc/network/interfaces

Change it to this:

auto lo
iface lo inet loopback

#Remove the wired network because it
#slows down boot if it's not connected.
#auto eth0
#iface eth0 inet dhcp

allow-hotplug wlan0
auto wlan0
iface wlan0 inet static
address 192.168.1.20 #(IP address of RaspyFi)
netmask 255.255.255.0
gateway 192.168.1.2 #(IP of router)
wpa-ssid MyWirelessNetwork
wpa-psk MyPassword