Hhow can I add a device to CC2000?

Before a device can communicate with the CC2000, its ANMS settings have to specify the CC2000's IP address and device management port number. 

You can just enable the "CC Management" feature without CC server IP and service port setting, perform the feature "Broadcast IP address and port number to the device" of the CC2000, it will cause the CC2000 to broadcast its IP address and device management port number to the devices connected to it on its network, which automatically sets them on the devices