Used as an PacketSniffer, using CC2540USBDongle with PacketSniffer to capture the wireless Bluetooth 4 packets. Can be used PC of the Bluetooth 4 device. Use CC-Debugger to write HostTestRelease program, with PC on the BTool software, to the PC end of the BLE host. Debugging four wire interface: GND/RST/DC/DD (simulation debugging requires only the four signal). CC2540-USBDongle for 8 GPIO, 2 user keys and 2 user LED, can be used as a CC2540 Bluetooth 4.0 development board