Resolved.
Situation was as described above: new green box installation, box boots, is on the network, but connection refused on both mobile setup and web (port 8123). Console accessible.
Two apparent issues:
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Potential DNS block. pi-hole may have fubared name resolution. The fix: set a static IP with different DNS (e.g. 8.8.8.8) in the DHCP settings in your router. Unsure if this was the root cause but flagging it here to cover all bases.
-
No battery: my green box shipped without a 2032 cell, producing ‘low voltage detected, date/time is not reliable’ msg, and potentially messing with certs. The fix: install a battery (or check it; others have reported poorly-seated batteries in the green box) and confirm the date/time (e.g. date -u) in the console.
Solution:
- Ensure names can be resolved (1 above)
- Ensure certs can certify (2 above)
- Reset the device (Step 2, here)
Resetting with an operating DNS and accurate clock allows the latest version of Home Assistant Supervisor and Home Assistant Core to be downloaded.