\ncline[linestyle=dotted]{res}{idle}
\ncarc[arcangle=30]{idle}{zeile}\ncput*[npos=.50]{\shortstack{rx\_new$\uparrow$
-\&\&\\rx\_data='\textbackslash 0'}}
+\emph{\textbf{and}}\\rx\_data='\textbackslash 0'}}
\ncarc[arcangle=0]{idle}{zeile}\ncput*[npos=.50]{btn$\uparrow$}
\ncarc[arcangle=40]{zeile}{idle}\ncput*[npos=.50]{$z>50$}