I have installed the HC12 library - https://github.com/honzakucera/HC-12 - and it says it is successfully installed. After restarting the IDE the library is not visible in the 'include library' list nor is any example visible in the 'examples' list.
The folder is visible in the 'libraries' folder and it has an 'examples' sub-folder.
AlbertHall:
the library is not visible in the 'include library' list
It is for me. Note that the Sketch > Include Library menu has the libraries broken up into several categories. The HC-12 library is under the "Contributed Libraries" category.
AlbertHall:
nor is any example visible in the 'examples' list.
The reason for this is that the folder structure of the example sketch is incorrect. The folder structure:
HC-12
|_examples
|_simpletest.ino
The Arduino IDE requires that sketches be in a folder that matches the file name of the primary .ino file. So the correct folder structure would be: