2017-05-09 0:46 GMT+02:00 Peter Robinson <pbrobinson@gmail.com>:

What disk image are you using? I believe all the images, definitely the minimal, as I use it regularly, have the required plugins and you can use the client to configure it. 


Thanks for your reply.
So, maybe it is the Fedora-Server-armhfp-26 image that doesn't include NetworkManager-wifi plugin, that lead me to "Error: No Wi-Fi device found." issuing the "nmcli device wifi rescan" command.
In fact:

[root@localhost ~]# rpm -qa |grep Network

Even if

[root@localhost ~]# iwconfig 
wlan0     IEEE 802.11  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Encryption key:off
          Power Management:on

I will try minimal image.
Anyway my question is still valid. Is it a simple task to add packages before inserting the SD card in the raspberry? Or it requires a lot of work and skills I don't have?