sudo vim /etc/wpa_supplicant/wpa_supplicant.conf
add to last
network={
ssid="your_wifi_ssid"
psk="your_wifi_password"
}
restart wifi network interface
sudo ifdown wlan0
sudo ifup wlan0
sudo vim /etc/network/interfaces
auto wlan0
iface lo inet loopback
iface eth0 inet dhcp
allow-hotplug wlan0
iface wlan0 inet static
address 192.168.1.155
netmask 255.255.255.0
gateway 192.168.1.1
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
iface default inet dhcp
sudo apt-get install lirc
sudo vim /etc/modules
lirc_dev
lirc_rpi gpio_in_pin=23 gpio_out_pin=22