Sensor network integrates sensor technology, MEMS (Micro-Electro-Mechanical system) technology, embedded
computing, wireless communication technology and distributed information management technology. It is of great value
to use it where human is quite difficult to reach. Power consumption and size are the most important consideration when
nodes are designed for distributed WSN (wireless sensor networks). Consequently, it is of great importance to decrease
the size of a node, reduce its power consumption and extend its life in network. WSN nodes have been designed using
JN5121-Z01-M01 module produced by jennic company and IEEE 802.15.4/ZigBee technology. Its new features include
support for CPU sleep modes and a long-term ultra low power sleep mode for the entire node. In low power
configuration the node resembles existing small low power nodes. An embedded temperature sensor node has been
developed to verify and explore our architecture. The experiment results indicate that the WSN has the characteristic of
high reliability, good stability and ultra low power consumption.
|