Design and implementation of low-powerhierarchical wireless sensors network

In this paper a hierarchical wireless sensor network is designed and tested. Each node of the network is based on an ARM Cortex-M3 microcontroller from NXP and nRF24L01+wireless transceiver from Nordic operating in the 2.4GHz unlicensed band. The designed node is featured by high energy saving and large data rate capability. These features were obtained by proper time synchronization and transmit power adjustment. This network can be used for machinery monitoring and diagnostic analysis, environmental monitoring and many other applications.