The secret header (see FieldInfo.cs) contains data of an undefined type, serving an undefined goal (for now:))
: The file "c_com.h" from the
EV3 source code
contains the description of the protocol used.
Watch it: look into the code, not into the comments/documentation. The comments in "c_com.h" are not in line with the code in the file (actually, this reminds me of a code smell :))