On Feb 16 2019 i posted in the rpi forums a link to Google Drive, where you could
get all the C source code to WSD.
For some strange reason it was removed from the forums.
Any way here is the link to google drive.
https://drive.google.com/open?id=1Gcjof ... lJL6o_9L8M
There are 3 directories, Execs, Dynlibs, Scripts. They have clear documentation.
Dynlibs includes source code for xpigpio, the modified Pigpio library, which probably
is the most important dynamic library for Rpi microcontroller apps.