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Ryan Downing offers another variant called PersWiFiManager. Luckily Ken Taylor forked the WifiManager library and addressed these issues and this is the library I am using below. It does not confirm when a connection has been made and it does not give you the new IP address the ESP8266 is using on the local network and of course, we need the IP address if we want to connect to it. The WifiManager library was originally released by Tzapu and while this is very good it does have a couple of short comings. It uses AP mode for the connection page which is available under the ESP8266’s own network and at a known IP address (192.168.4.1) and then uses STA mode to connect to the local network. WifiManager uses both Access Point mode and Station Mode together. If it cannot connect, it uses AP mode to display the connection page again. When a successful connection is made, the ESP8266 remembers the credentials and tries to connect to the same network next time. This means once you have connected to a network, you do not need to keep entering the details unless the network changes. If the connection fails an error message is displayed. If successful it will show the local network IP address. After the user has made a selection the ESP8266 will start Station Mode and try to connect to the selected network. On first use, when using the library, the ESP8266 will start in AP mode and display a small connection/admin page that allows the user to select and connect to a local network. This allows the ESP8266 to connect to any local network without the need to hard code the network credentials in to the sketch. WifiManager is a library that adds a connection page or connection portal to the ESP8266 sketch. Part 3: Control an LED from a web page using Access Station Mode (ST) Part 2: Control an LED from a web page using Access Point Mode (AP) Part 1: The Esp8266 and setting up the Arduino IDE

It would be better if we could pick the network to use at run time.

What happens if you want to move the ESP8266 to another network or if you buy a new router? You need to change the sketch and re-upload. It is fine for messing around with examples and when developing sketches but not very convenient or practicle for final projects. In the previous guides we connected the ESP8266 to a local network using hard coded credentials.