Epson SX 425W Printer Wi-Fi Connection

I will explain from the beginning
For everyone
First, you need to install the drivers using the CD, then you can enter the key that the printer requires, which is the security key for your router; it can be between 5 or 13 characters or between 10 or 26. (I don't know why it asks for 8.)
Normally, after installing, the Epson drivers explain clearly.
(Too bad it's in English, but we manage)
Normally, everyone who has installed with the CD can see this page

file:///C:/Program%20Files/EPSON/TpManual/EPSON%20SX420W%20Series/fr/Netg/panel/g_html/manual_01.htm

Normally, you should be able to print from your computer but not scan. My problem was mainly with this, and I solved it by going to (for XP)

Start - All Programs - Epson - Epson Network Configuration -

The EpsonNet setup opens; you click once on "Next," and you note your IP address, which will be 4 digits separated by a dot, between 0 and 255. You continue on to Next to make sure everything is fine and return to

Start - All Programs - Epson - Epson Scan - Epson Scan Configuration
You click on "Stop," then on "Add," "Enter Address," and there you put your IP address - OK and again OK
And there you go
I hope I was clear and that you will all succeed on the first try
Good luck
And let me know if everything works.