Tutorial Example
This examples in the HomeDing library contains the source codes and snippets explained in detail in the documentation about How to create and extend a new Element.
To setup the development environment and using a ESP8266 board in general please look into the description of the Standard Example. Here the add-on featured for supporting development are described.
Template Element
This is an Element implementation that only contains the empty functions and some additional information as comments that help implementing new Elements.
The 2 files (TemplateElement.*) can be copied / renamed and the class name should be adjusted as well.
Then implement the inner part of the set, loop and other functions as required.