Just to summarise where I'm at with these Halo S3 units.
While on the Halo SSID, I've tried the mwlogin.net and 192.168.0.1 (plus other IPs that seemed logical from snooping around the Plusnet hub setup page). Done this all on my phone, old phone, Window 11 laptop.
The Mercusys app on my phone takes me through a setup to make the Halo my main WiFi router, which doesn't work. I don't think this applies to the old S3 units. In the paperwork and data sheets for the S3 units there's no mention of the LED ever being BLUE, which the app is telling me to look for.
With Halo on an ethernet cable, my PC didn't find the unit, due to no valid IP config.
With the Halo back in my workshop, wired through powerline adaptors, it's just radiating its own SSID and there's no Plusnet WiFi to speak of. Barely showing on my WiFi analyser and often disappearing all together.
Somehow, I think it's time to give up and find another device, which I can definitely configure in AP mode for WiFi from my wired setup in workshop / garden area.
