WifiMulti support

[Bolukan]

Basic Infos

I would like to register multiple Wifi stations (SSID's). If the device enters the configportal it should be an option to keep (max 2) existing SSID's (show SSID's).

Hardware

WiFimanager Branch/Release:

• [ ] Master
• [x] Development

Esp8266/Esp32:

• [x] ESP8266
• [x] ESP32

Description

My use case is I move these devices between my main network and my "mancave" network, or towards a friend. I want to keep multiple SSID's present on the device. As is known esp devices support up to max 3 SSID's.

I would like to register multiple Wifi stations (SSID's). If the device enters the configportal it should be an option to keep (max 2) existing SSID's (show SSID's).

The library should support some kind of WiFiMulti. This could be implemented as a fallback scenario if the primary SSID is not available and the scan identifies SSID-2 or SSID-3. It should try to connect to them before opening an AP.