Can I disable the Wi-Fi function of the Wi-Fi module so that it works as a simple Powerline?
Yes, it is possible to disable the Wi-Fi. To do so, please follow the steps bellow.
2 Browse to the Web UI IP Address
3 Enter the credentials
Once on the home page enter the password: admin
4.

4 WLAN Settings
Click WLAN settings and then select Basic settings.

5 Wi-Fi Deactivation
Unselect the Enable checkbox on the Wireless line, according to your needs and click Save.
