官网：http://www.hw-group.com/products/hercules/index_en.html 不要再自己傻傻的写socket测试客户端了
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 (Network virtual Terminal) parser for remote I/O pins control.