So regarding to the WiFi, actually it is configured to connect to my home router, but if I go out it switch to be an AccessPoint with some defaults data? Thereis a way to change the wireless settings via a webpage?
I'm not sure what you want to achieve using the Arduino as access point. If you want to use it in the field, I would recommend one of these two options:
Use a WiFi access point in the field and connect all your devices including the Wemos to it. This way you simply span a local network without internet connection.
Connect your Wemos with the USB cable directly to the server (Raspberry or whatever you are using)