create this file
# touch /etc/wpa_supplicant.conf
insert the following lines
######################################
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
eapol_version=1 # 2 works for me too
ap_scan=1
fast_reauth=1
network={
ssid="hacktheplanet" # this should be your ESSID
key_mgmt=WPA-PSK
proto=RSN
pairwise=CCMP TKIP
group=CCMP TKIP
scan_ssid=0
#psk="YourPassphrase" # use 'wpa_passphrase yourEssid' and enter your passphrase up to 64 chars
psk=**********
}
######################################