I interpreted that page as though it isn't, but I haven't installed the current stable release to check.
I have the stock firmware on the primary, is there good reason to use Gnuton's current non-experimental version on it instead? I know very little about routers, mostly I just want them to...
@ColinTaylor Solved it!
I just rebooted the secondary and now it's working, as your comment
... was the clue.
After all the networks came back up, the discovery tool gave me the 62.x IP of the secondary (no longer any sign of 192.168.1.1), and I can now get to the login page.
The secondary...
@ColinTaylor Thanks for the reply.
I'm going by what the discovery tool is reporting. It finds two devices:
There's 192.168.62.1, as I expected (showing the SSID of the 2.4G network from the primary), and 192.168.1.1, showing the SSID (with _RPT appended) of the 5G network from the repeater...
I'm also struggling to connect to the router's login page after switching it to Repeater mode, using Gnuton's repeater firmware from here,
I can successfully connect devices to the secondary WiFi network and access the internet from them, so the router does seem to be acting as a repeater...