I know my Pi’s IP address
My Sonoff devices talk to MQTT at 192.168.1.190 with no problem.
Other ESP8266 sensors running my code for well over a year are trying to talk to MQTT at hassio.local.
They have broken a couple of times before; once when I reloaded the system after the mDNS name changed to homeassistant.local, and twice (after OS updates) when the name on my network changed to “hassio-2.local”.
The change to hassio-2 was easily fixed by changing the name twice in Superisor->system, as in the link I provided.
When the name had the “-2” added you could open the UI with http://hassio-2.local:8123
After the OS update to 5.8:
I still can open the UI with http://hassio.local:8123/
Samba works at smb://hassio/config/ or smb://hassio/share/
So the mDNS hostname has not been changed this time.
But there’s something broken between hassio.local and MQTT in OS 5.8.
The code on the devices has not changed.
The router has not changed.
I don’t know where else to look.
-Mike