@schillkroete 

Right. This sometimes happen with old firmware, instead of useful information it just says something like "Deco is functioning OK' and it'll keep saying that until you have device connected to it. Which you can't. :(

Sometimes, opening same page with Deco node, Dr in you case, again and again few times finally forces Deco app to show information. Perhaps, restart of smartphone could help. Please try few times and see if it works, meanwhile I'll write another reply telling what to check in WiFi analyzer.

@schillkroete 

Take your smartphone to where you M5 is, and stay close to M5. Turn off and on WiFi on smartphone or just restart it.

After that. In WiFi Analyzer, open "Wireless" screen from the icon on the bottom of main screen. You should see list of WiFi networks your smartphone sees, example:

If your M5 properly broadcasts signal, your network name will be on top as it is strongest signal, and with two channels listed. One will be for 2.4GHz and one for 5GHz. Please make screenshot of that screen and share it. If you can't find your WiFi SSID on it - something is wrong. If it is not on the top, it could mean M5 does not broadcast WiFi signal, and what you see is one of your P7 that are further away.

Touch that your network SSID and next screen will open, example:

It will list same "Pretty fly for a Wifi" SSID and very important, Security of that network. It should be WPA2-PSK, if you see something else that could be a problem. Please make screenshot of that and share it here, too.

@Alexandre. 

With the Results I get it seems like M5 does not work wirelessly.

@Alexandre. 

I tried to install Beta firmware before. Unfortunately did not work like all the other versions did not either. Thank you very much for your time and effort. 

I'm gonna return the M5.