@OyyoDams
Thanks for reply.
I have a "Netis WF2123" (don't know which chipset) and a USB-WLAN-Stick with Ralink 5370 chipset. The Ralink 5370 is working with the OGS - but not with the current version of RecalBox.
With other Operating-Systems my WLAN-Stick is working with the OGS. So it seems to be no Hardwareissue.