Hi guys, I have solved the problem. I thought I had the function "only allow known devices in the Wi-Fi" disabled and set to "allow all devices". Unfortunately, my router has not adopted the setting. After I changed it, everything worked

Hi Leute, ich habe das Problem lösen können. Der Fehler lag bei mir. Ich dachte ich hätte die Funktion "nur bekannte Geräte im WLAN zulassen" deaktiviert und auf "alle Geräte zulassen" gestellt. Leider hat mein Router die Einstellung nicht übernommen. Nachdem ich es umgestellt habe, hat alles funktioniert

@Scavy what do you mean with encryption?

No there are no special security settings on my router. My password is only numbers. All devices are allowed to connect to the router.

Hi, I used the latest stable version for the 3B and the Christmas-beta for the 3B+. I've set up the systems by myself, no pre-made images from the internet.
The connection was testet by trying to get access through the manager.
I've already changed the wifi channel to 8 but that didn't work too.

Ich habe den Thread übrigens auch im internationalen Forumsbereich nochmal auf Englisch gepostet um mehr Leute zu erreichen. Wenn hier allerdings jemand eine Idee hat gerne her damit
Ich werde die beiden Beiträge dann bei ein Lösung des Problems ergänzen.

Do you need more information?

No I'm using the internal chip.
As I described in my opening post I already set the country code to DE.

Sorry I don't understand your question. Is it possible that I have a different chip on my pi3 than on yours?

Hi,
I posted the same thread at the german forum two days ago. Since there was no response until today I try to reach more people at the international board. Sorry for double posting and for my bad english.

Here is my problem:
I can connect to the Internet via LAN but not via Wi-Fi. I've tried several ways on Pi3 and 3+.
Here is what I've tested already :

-SSID without special characters, once with spaces, once without spaces.

-Password without special characters.

-Registration via UI (SSID is found, connection is not possible).

-Log in via Manager (saves the settings, but does not connect).

-Login over the .conf (saves the attitudes, but does not connect) the semicolons before the SSID and the key removed thereby also, the Country code I put on DE, wifi enabled I set to 1.

-The SSID on the router is visible, the security key is WPA2, the channel I have set to 8 testwise (normal would be auto, but that's not working too)

So I hope I did not forget anything.
After each change of settings, I rebooted the Pi, to no avail.

I tested all settings with both Pi's (3b and 3b +).
I do not know what else I can test. I hope you can help me.
Btw, the WLAN chip works on both Pi's, because with other operating system everything works perfectly.