In this tutorial, we explain how to change the WiFi password on a TP-LINK TL-MR3420 router. The WiFi configuration/setting on this router is very simple. The first thing is to have a network cable connected directly to the router. When you have it connected from the browser of your computer enter http://192.168.1.1/. You will be directed with a page that will ask for a username and password.
If you can not login with that user and password, they may have been changed. You can try resetting the router to its factory settings and try entering again.
Note: The router can be reset by a button located inside a hole in its back or side.
What you have to do there is to modify the first option that says “SSID” that corresponds to the name of the wireless network. You put the one you want and the other options we leave them just as they are in the image. When making changes click the button below that says “Save” to save the changes made.
Then in the same menu on the left in the section of Wireless click where it says “Wireless Security” and in the last section check the box that says “WPA-PSK / WPA2-PSK“.
Then the other options leave them as the time in the image except for the one that says “PSK Password” that corresponds to the password. You put the one that you want that it has to be of 8 to 63 characters. In other words, “PSK Password” is where you change your Wi-Fi password. When you make the changes, click the “Save” button at the bottom to save the changes.