Maikel wrote: ↑
Tue Oct 09, 2018 6:01 pm
...I create the WAN with a mobile phone,...
... but if I try to create the same WAL with the same SSID with the same password it's so difficult for the raspberry to connect there...
...I checked it with a LAN scanner...
...one time it worked with the different phone....
Well, that's difficult to respond. WAN, WAL, LAN... First of all, I assume:
- you are using both phones, old and new for creating a W-LAN (WIFI) acces point, an AP. From now I will use the term AP phone
you connect some client phones plus the Pi to that AP phones
the AP phones have a somehow mobile WAN connection, so you use them as wireless access point router for other phones and your Pi to access internet
What did you scan with the LAN scanner? Somehow you'd better post results of that scan. I suspect, you'll rather need a W-LAN scanner. Or was a W-LAN scanner meant?
If your Pi still connects to the old AP phone and not to the new, plus, if all other W-LAN clients connect to both, check for the W-LAN channel, both the AP phones use. There is a chance, your Pi cannot connect to the upper W-LAN channels 11,12,13 but your second AP phone establishes an access point with these channels. For android, there is an app WIFI analyzer available at no cost, that will show you all the AP's channels.
Do the following test, since your Pi might not change access point when running.
Try to connect all your client phones and the Pi to the old AP phone. Make sure, no other access point is running, especially not the new AP phone. With the WIFI analyzer, it is quite easy to check for other access points running.
Now switch off all your devices. Not w-Lan off, shut them down.
Switch on new WAN phone. Wait for the access point to establish.
Try to connect all your client phones and the Pi to the new WAN phone. MAKE SURE, no other access point is running, your Pi knows of. In other words, keep your Pi from connecting to any other access point.