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The sensor node consist of a
1. sensing unit
2. processing unit
3. memory unit
4. self power unit
5. wireless transreceiver
* Sensing unit: it
consists of a sensor and analog to digital converter [ADC]. the
analog signal produced by sensor
is converted to digital and is fed into processing
unit. The sensing unit is
responsible for collecting the data externally and interacts
with central processor
* Processing and memory unit: the
processing unit is responsible for performing
some computations it executes
some instructions which is responsible for setting up the connection with
another node. The memory unit is used for storing the data.
* Self power unit: it is
responsible for powering the node and keeping it alive. The
main task of the sensor node is
to identify events , to process data , and then to transmit the data. The power
of a node is consumed mainly in the transmitter and receiver unit. The sensor
node can be supplied by a self-power unit, self-power unit battery, or solar
cells.
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