The configuration of ENS is done via a web interface.

At startup the device indicates the IP address or connect. It can operate in AP or client mode.

Changing the number is done via the web interface very easily. There is no login and/or password, but this option can easily be added. 

I used a Nextion screen to make this device. I find them very easy to use and the design software is well done. 

The background image can be modified from the interface as well as the text color. 

The screen size is variable. I opted for a 2.4", but it is possible to make it bigger. 

I made this object to help my wife during her live sales on Facebook. 

Feel free to contact me if you need more information.