Hercules is great utility if you are working with the serial and Ethernet devices & interfaces. General useful parts : Serial port terminal (COM5 and higher support) TCP/IP Client terminal (similar to "Telnet") TCP/IP Server "terminal" UDP "terminal" For HW group devices only : UDP Config utility (IP, Port, MASK, GW setting) Test mode (TCP/IP terminal with TEA authorization support and NVT (Networ