Hardware design of wireless sensor network nodes

IEEE802.15.4 is a latest international wireless sensor network communication protocol,while the core of the wireless sensor network,the microprocessor,must be compatible with the communication protocol.After describing the design requirements and function modules,the network node design idea and design methods were introduced.The hardware designs of wireless network based on JN5121 wireless sensor were expounded,including the designs of microprocessor structure,performance characteristics,external circuits and hardware platform.The software exploitation environment of JN5121,the constitution of radio part,the connection and control and the developed products were also presented.The design can meet the design requirements,and has low power consumption characteristics.