[English]
Warning: Only Support RJ45, not support WIFI/GPRS/4G, if you want to read tag actively, you must use ReaderSoft to set interface to RJ45, and set WorkMode in ActiveMode. The IP and port is Reader's localIP and Port.

please copy libSWNetApi.so to system lib first
sudo  cp ~/libSWNetApi.so /lib/libSWNetApi.so


[Chinese]
提示：该代码仅适用于网口，不适用于WIFI/GPRS/4G。如果想要主动读卡，请用读卡器软件设置上传接口为RJ45，同时设置工作模式为 主动模式。代码中的IP 及 Port 是读卡器的本地IP及端口号。

请先拷贝 libSWNetApi.so 到 系统库中 
sudo  cp ~/libSWNetApi.so /lib/libSWNetApi.so