The wireless interface card is the low power wireless sensor networks. The Xbee modems are one of the easiest ways to create a wireless point to point or mesh network. It has on board 3.3V low drop voltage regulator and LED indicators for reception, transmission status and activity of RSSI and power indication. It is compatible to work as the modem for Embedded and FPGA development boards. It is the basic wireless sensor module for implementing the wireless control projects.