Volumio 4 - no way to enable AP

Which version do you have?

Hardware version Chipset
v1 / v2 Realtek RTL8188EU
v3 Realtek RTL8188EUS (minor variation of EU)
v4 (newer) Realtek RTL8188EU / RTL8188ETV (variant)

These RTL8188EU chips are known for:

  • messy Linux driver situation
  • weak AP support
  • poor concurrent AP+STA capability

Also check:

It’s reported as not working, as it has been dropped by the Debian kernel.

I would advise to get a different dongle.