root@rpi:/etc/wpa_supplicant# vi wpa_supplicant.conf

ctrl_interface=/var/run/wpa_supplicant

update_config=1

eapol_version=1

ap_scan=1

fast_reauth=1

network={

mode=0

proto=RSN

key_mgmt=WPA-PSK

psk="12345678"

ssid="Router"

}