"Failed to connect to network"

I have a Pi 3 that can see wireless networks, but can't connect to them.

This happens with multiple networks (5G and 2G), running the latest PiOS Bullseye.

I suspect that something has failed in the hardware - when I first got it, it used to connect.

Is there some way to ascertain what's actually failing?

Thanks,

Daniele

Sounds unlikely, but it could mean your Pi can receive but not transmit, if you setup an ad-hoc network on it, can other devices see the Pi?

There may be a mix-up of what is a wireless network.

The wireless in Pi3 is a WiFi wireless Ethernet, needing a WiFi base station pretty near (within about 100 m).

The 2G and 5G networks are mobile phone networks completely separate from WiFi.

.....

I imagine he means the 2.4GHz and 5GHz wi-fi bands. Abbreviating abbreviations can confuse.

I'm sure that was it, yes. Not leaving a space between value and unit is also confusing. "2G" and "5G" are indeed single word terms but 2.4 GHz and 5 GHz need spaces.

Having come from physics to electronics, this EE custom of no-space-between-value-and-unit irks me no end.

I once had a phone where the 5 GHz wifi transmitter failed or actually it was working but very weak. So the phone could see my 5 GHz AP but couldn't connect to it, unless it was right next to the AP. Kind of useless wireless, that.

So you could maybe try getting closer to the AP. You might also consider what kind of case you have, if any.

Sorry, I'm being sloppy - 2.5 GHz and 5 GHz WLANs, nothing to do with mobile telelophony.

Daniele