With the development of sensor technology, wireless senor network has been applied in the medical, military,
entertainment field and our daily life. But the existing available wireless senor networks applied in human monitoring
system still have some problems, such as big power consumption, low security and so on. To improve senor network
applied in health monitoring system, the paper introduces a star wireless senor networks based on msp430 and DSP. We
design a low-cost heart-rate monitor senor node. The communication between senor node and sink node is realized
according to the newest protocol proposed by the IEEE 802.15.6 Task Group. This wireless senor network will be more
energy-efficient and faster compared to traditional senor networks.