- The ssid i.e. TP-Link
- The router password
To get the ssid run :
iwlist wlan0 scan
Then find the ssid out of the data it gives you.
Now we need to login to the Pi.
Once your logged in open up the file /etc/network/interfaces, you will need to be root.
Find the line that says
Add the following lines below it
iface wlan0 inet dhcp wpa-ssid "YOURSSID" wpa-psk "YOURPASSWORD"
Now reboot your Pi and you should be connected to the wifi.