A tool shows a particular feature of the Calimero library, and aims to help in getting familiar with the library and interact with the offered library API. Nevertheless, while hopefully allowing some insight in the APIs, every tool tries to implement ready-to-use functionality on its own.
In general, the tool implementations are console based, i.e., they are intended to run in a terminal or command line window.

Every tool keeps all its required code in the same file to avoid additional file dependencies, which should help when examining the code of a tool in the first place. On the other hand, copies of some source code utility functionality might therefore appear in several tool files. To check out the implementation and control flow of a tool, a good point to start is the main-method of that tool.

Access to the KNX network can be done with KNXnet/IP, using an IP network connection, or with FT1.2, using a serial port connection.

KNXnet/IP address considerations:
On more than one IP address assigned to the local host, and possibly several local network interfaces available (also known as multi-homed hosts), the default chosen local host might not be the one expected by the user. In that situation, the local IP address has to be supplied manually, using command line options.
The KNXnet/IP protocol expects IPv4 addresses by default.
Network Address Translation (NAT) aware communication can only be used, if the remote KNXnet/IP server supports it. Otherwise, connection timeouts will occur. With NAT enabled, KNXnet/IP also works with IPv6 addresses.