Cannot connect to HA Web interface via WiFi

Configuration Frontend
1

I’ve been using HA for about two years, mostly without any issues. Recently, I retired my RP3+ in favor of a Lenovo ThinkCentre running the Generic x86-64 emulation. Everything works great, except for this one wrinkle:

  • If I open a browser window – MS Edge or Google Chrome – on a PC that is wired-connected (CAT5) to my home network as homeassistant:8123, I get the expected interface to HA.

  • If I try to do the same thing on a tablet or phone, I get a “Connection Error” message. I’ve tried Chrome, the HA ‘official’ app, and Wallpanel. All three seem to attempt to connect, but don’t complete the link. The error messages are similar.

  • The HA ThinkCentre sits at a pseudo-static (MAC-reserved) IP on the network. I’ve tried calling it as homeassistant:8123, homeassistant.local:8123, and by directly calling out the URL (ex: 192.168.1.13:8123). All fail in the same manner.

This problem came up because I wanted to add a tablet on the wall near the back door, to check the lights, locks, and thermostat before leaving the house. 95-99% of the time, I use other means (PCs, dedicated Z-Wave remotes) to make changes, or let HA run things through Automations. So, I really don’t know when things stopped working through WiFi. It used to work.

Does anyone have any ideas about what I need to change, or where to look? I’m assuming that the problem is related to using x86-64, but I could be wrong. I haven’t tried the wireless connection for at least 3-4 months.

Thanks for your help.

Regards,
-BW

2

Did you connect the tablet to “normal” wifi or did you maybe use a guest network that runs clients in isolation from the local network? Because it is strange that wired works as expected and this doesn’t.

3

It’s normal WiFi, not the guest network. It’s really strange, because it’s not just the new tablet. I have two tablets that serve as TV remotes in the family room; both have Wallpanel installed on them, in case I need to turn off a light or something. Both used to connect to HA, but not anymore. Same thing with my phone.

Unfortunately, a lot has changed since the last time I saw things work: new HA host, several Core and OS updates, etc.

I may just bite the bullet and break out another Z-Wave remote …