I want to make an RPI 3 model b wifi repeater/bridge. I want to make it work without ethernet cable. I've found a few topics and guides but most of them are eth0 -> wlan0 or outdated or simply never worked. The first problem I faced that the PI says I can not put the adapter to master/ap mode but I am SURE about the dongles support it. I tried with 3 different adapters on Windows, all of them worked but none of them on the PI but the "AP" mode is supported as shown by the "iw list" command. So I am totally disappointed.
Also tried bridge-utils without any success:
brctl addbr bridge0; brctl addif bridge0 wlan0
can't add wlan0 to bridge bridge0: Operation not supported
So I'm looking for a detailed UP TO DATE guide to set up a wifi repeater on the pi.