Study On Wireless Sensor Networks Node Design And Application Based On TinyOS

As a new generation of information technology, Internet of Things (IOT) attracts widespread attention at home and abroad. As an important branch of IOT, wireless sensor network (WSN) is one of the focus of today's research on wireless communication. Wireless sensor networks are widely used in military forces and equipment monitoring, agro-ecological environment monitoring, environmental monitoring, medical care and other fields.Firstly, the paper summarizes the research status on wireless sensor network technology and indoor environment monitoring system, designs an indoor environment monitoring system solution with the ability of nodes location and gives the system's hardware and software design index and system architecture.Secondly, the paper studies the hardware design of sensor nodes based on ultra low-power processor MSP430F1611, wireless communications chip CC2420 and the temperature and humidity sensors SHT11, and the software design of each driving modular and tree routing based on the embedded operating systems TinyOS (TinyMicro Threading Operating System).Again, in order to realize the function of node location, the paper studies the node location based on the received signal strength (Received Signal Strength Indication, RSSI) under the self-designed sensor node platform. The research on the location of node mainly includes RSSI-based ranging and location algorithms simulation.Finally, the paper builds a tree-based routing wireless sensor network using the self-designed sensor nodes, gathers the indoor environmental information of sensor nodes and passes the information to the sink node through the tree routing. Sink node passes the collected environmental information to the host computer through the serial port in order to achieve the display of collected information and the routing status between different nodes. Through the spoken experiment, it verifies the reasonable and effective of the design.