I have a client (panasonic digital camera) that can only wirelessly connect to wifi and SMB server (without the proprietary app that is now no more available) to unload the pictures. This only remaining way is open source, I use Samba/termux on my loved NP1, but unfortunately the camera SMB client cannot connect to the server with its name*. Although it reaches to connect with the IP address of the server, which is the same tether/gateway ip address. I just needed to allow the samba server to bind to interface wlan1 too, as well as tweak 2 dedicated iptables rules for wlan1 to redirect 139/445 privileged ports to high port numbers the server listens to. Unfortunately, the hotspot changes its IP on every start as per current Android standards. But it is by Android that OEM feature user custom settings for the hotspot (wlan1) : we can see oem dedicated chains in iptables outputs. Please Nothing Devs, include settings for the hotspot (at least ip/mask).
Best regards and thank for making such nice device.
*2 issues on my side here : nmbd fails to run (maybe termux issue) and the camera fails to connect to an IP that is not in the same network (I used e.g. ip address add 192.168.222.1 dev wlan1), maybe because of old firmware or poor implementation, when my laptop can connect to this 2nd IP for the smb server.
So please, make the hotspot network adjustable. Thanks again