activating external WlanDongle?

[Alexus]

Try turning off the integrated WiFi adapter first (System Config), then shutdown, plug in the USB WiFi adapter and power up.

Just be aware if there is no Linux driver in the kernel for the particular USB WiFi adapter you are trying it won't work and you will have to connect an Ethernet cable in order to be able to access moode and turn back on the integrated WiFi adapter.

Thanks, I tried it, afterwards there was no wifi anymore. If I type iwconfig, I can see under wlan1: IEEE 802.11  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=20 dBm   
          Retry short limit:7   RTS thr=2347 B   Fragment thr:off
          Power Management:off

So I think, there must be a driver in the operating system otherwise under wlan1 there is nothing written, but Moodeaudio only wants the internal....

Using Raspberry 3B+