Implementation of a Roco Z21 Server Simulator in Java Based on the excellent work of Philipp Gahtow's C++ XPressNetLib for Arduino Published with written permission as of 17th of Feb. 2015. This Z21 ...

so you are able to answer a request to the IP that ask. The UDP answer is generated by serial receive, the data always start with the identify code. The length of each packet is coded in the second ...