$ sudo nano /etc/wpa_supplicant/wpa_supplicant.conf

-----
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
        ssid="PCI"
#       psk="*******"
        psk=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
        key_mgmt=WPA-PSK
}
-----

$ sudo nano /etc/network/interfaces
-----
auto wlan0
#iface wlan0 inet manual
iface wlan0 inet static
       address 192.168.1.104
       netmask 255.255.255.0
       network 192.168.1.0
       broadcast 192.168.1.255
       gateway 192.168.1.1
       wpa-ssid network-name
       wpa-psk pre-shared-key
-----