Brother dcp 7055W network key wrong?

I would like to be able to print via the app (Brother) but unfortunately we have a new Wi-Fi. I just can't get the printer to connect to the new Wi-Fi. Go to network then there's SSID search And select our Wi-Fi then I should enter the network key. I have the serial no. The Wi-Fi and password and everything else tries everything wrong. As far as I know it must be the last 5 numbers right? Still wrong? Must the cable from the printer be connected to the laptop or something? The printer and the Wi-Fi are less than 1 meter away. I need urgent help 😂😂 no time for correct spelling! 😭😂

I have the serial no. The Wi-Fi and password and everything else tries everything wrong. As far as I know it must be the last 5 numbers or

You should not try anything but enter your correct WLAN key, if it has not been changed it is on the router or you can also look in the menu of the router…

Is none of your devices, for example lappi, connected to the WLAN?

But we have had the Wi-Fi for half a year and we can't print on the cell phone. We can only print on the laptop when the cable is connected. And the whole Wi-Fi key doesn't fit in because only 5 numbers fit in.

Then you are in the wrong menu of the printer… The Wi-Fi key is at least 8 characters long…

And if you know the Wi-Fi key anyway, why try something, there's only ONE key for ALL devices

https://www.brother.de/support/dcp-7055w/faqs/setup-settings

Here you will find all the instructions for your printer to connect to Wi-Fi