Sure, I’m happy to try to help: I’ll recap things here as precisely as I can (because this one is rather complex to debunk and solve remotely), and keep this post updated as it may help others too.
Let’s first make sure we are talking about the exact same wifi issue:
with your Pi3 (or possibly PiZero W) running recent re-imaged 2.118 Volumio2 version (though issue also happened before), stock-Volumio can NOT connect to Home AP wifi IF Home AP wifi is NOT set on Channel#4.
(Please do re-read carefully, and check opposite is also true: Volumio2 connects OK if Home AP is on Channel #4)
That’s the specific issue discussed on this thread: do you confirm this is the particular issue you have?
If not, then please search for other threads about your different wifi issue, and create a specific one if you don’t find convincing results.
If that characterizes the problem you encounter, then the only interim workaround for now is to keep both your Home wifi AP and Volumio Hotspot setting on Channel#4. Eventually you may elect to keep them both on any fixed channel you may set within Volumio Hotspot preference: this should at least give some level of flexibility to find an acceptable match in order to accommodate your particular wifi neighborhood situation…
If you are willing to help resolve this so that it can be fixed for good (thanks!!), can you then please:
- remove any eventual USB-wifi dongle you may have connected to the Pi.
- hook an Ethernet cable between your Pi and your Home network gateway (so that we make sure you still get IP network if wifi fails).
- set your Home wifi AP on other channel than #4 (please check your Home wifi router doc for this: probably can’t help for this)
- with Volumio2 web interface, keep Volumio Hotspot on channel #4, save, and then turn OFF Volumio2 Hotspot feature & save again
- with Volumio2 web interface, make sure Wireless is set to ON
- under SSH, apply the changes mentioned here, just to avoid mixing some other potential issues
- with Volumio2 web interface, reboot Pi.
Is Pi still NOT connecting to the then-configured Home wifi AP?
Then you may try the suggestion from this post, and report here if it brings any benefit to successfully connect to the Home wifi AP.