How to configure one wifi interface to opportunistically connect to multiple SSIDs?

[jmomo]

Thanks slh! Travelmate looks perfect. If it's features list is to believed, this does everything I want to.

https://github.com/openwrt/packages/blob/master/net/travelmate/files/README.md

Travelmate support thread

Hi, in the OpenWrt stable & snapshot package repo you'll find the travelmate package, a wlan connection manager for travel router. Main Features STA interfaces operating in an "always off" mode, to make sure that the AP is always accessible Easy setup within normal OpenWrt environment Strong LuCI-Support with builtin interface wizard and wireless connection manager Fast uplink connections Support all kinds of uplinks, incl. hidden and enterprise uplinks WPA3 support includes a vpn hook with …