Wireless sensor networks (WSNs) consist of distributed sensor nodes that self-organize to monitor environmental conditions over a wide area. They have many potential applications including health monitoring, infrastructure monitoring, and environmental monitoring. Each sensor node contains a radio, battery, microcontroller, and sensor interface. The network architecture uses gateways to connect the wireless sensor nodes to wired networks. Key challenges are minimizing energy usage to extend battery life since many applications require years of unattended operation.

1. NETWORKS OF
WIRELESS SENSORS

2. INDEX:
 1. INTRODUCTION
 2. OBJETIVES
 3. NETWORKS OF WIRELESS SENSORS
 4. GENERAL VISION
 5. POTENCIAL APPLICATIONS
 6. ARCHITECTURE OF SYSTEM WSN:
 7. COMPONENTS OF A NODE WSN:
 8. CONCLUTIONS
 9. BIBLIOGRAPHY

3. INTRODUCTION
 The creation of smart environments, created from simple devices
incorporating the objects around us, is the goal of ubiquitous
computing. Within this field include Wireless Sensor Networks WSN
or (Wireless Sensor Networks).
• These networks consist of hundreds or thousands of small nodes
intelligent but simple and very low cost, forming an autonomous
network that is where they themselves self-organize and manage
and, in turn, collaborate and cooperate to measure a physical
parameter the environment.
 This article presents the characteristics of these networks, their
potential uses and accused design constraints that make the
challenges are great research interest.

4. OBJECTIVES
 Implement a database with the information provided by nicknames
that are taking a census.
 Create a PHP based program to transfer the information from the
database to the Internet.
 Make a Web interface that allows a user to access to both the state
of the sensors in real time, as information collected and stored by the
nicknames
TelosB.
 Evaluate the effective functioning of both the interface real-time
information and the database.
MONITORING.

5. NETWORKS OF WIRELESS SENSORS
 These are
minicomputers
oriented to a task
specific, easy to
install and able to
realize processes
in very just a short
time.

6. GENERAL VISION:
 A network of wireless sensors (WSN) is a network that
consists of distributed devices spaced and independent
using sensorial to monitor physical training conditions or
environmental. A system WSN incorporates gateway that
provides wireless connectivity with return to the world of
cables and distributed nodes (it sees Figure 1). The
wireless protocol that is selected depends in the
requirements of the application. Some of the standards
available include 2, 4 radios of GHz based on the
standards 802.15.4 IEEE or IEEE 802, 11 (Wi-Fi) or
proprietary radios, which are regularly of 900 MHz.

7. Components of WSN Distributed
Gateway and Nodes

8. POTENTIAL APPLICATIONS:
 Their fields of application are in different areas including
the care of the basic health, services and remote
monitoring. In the health case, the wireless devices make
the monitoring to the patients less invasive and to do
possible the care of the health of efficient way. For basic
services like electricity, public lighting system and water
city councils, the wireless sensors offer a method of low
cost for a system of healthful data collection that helps to
reduce to the use of energy and better handling of
resources.

9. POTENTIAL APPLICATIONS:
The remote monitoring covers an ample rank with
applications where the wireless systems can
complement cable systems reducing wiring costs and
allowing new types of applications of measurement. The
applications of remote monitoring include:
 Environmental monitoring of air, water and ground
 Structural monitoring for buildings and bridges
 Industrial monitoring of machines
 Monitoring of processes
 Pursuit of assets

10. ARCHITECTURE OF SYSTEM WSN:

11. The system architecture WSN
combines wire and wireless
 The wireless technology offers  The wireless technology offers
several advantages for those several advantages for those
who they require to construct to who require to construct to
systems wireless wirings and systems wireless wirings and
are useful the best technology are useful the best technology
for his application. An for his application. An
architecture flexible software architecture flexible software
like NOR Lab VIEW, a like NOR Lab VIEW, a
graphical platform of design of graphical platform of design of
systems is important. Lab systems is needed. Lab VIEW
VIEW offers the required offers the required flexibility to
flexibility to connect an ample connect an ample rank of
rank of wireless devices with wireless devices with cable.
cable and. (look at Figure 2). (Look at Figure 3).

12. (Look at Figure 3).

13. COMPONENTS OF A NODE WSN:
 A node WSN contains some technical components. These
include the radius, battery, microcontroller, analogical
circuit and an interface to sensor. When you use
technology of radio WSN, you must make compensations
important. In systems fed with battery, discharges rates of
data and frequent use of radio consume major energy.
Often, it is a requirement three years of life of a battery, so
nowadays many of systems WSN are based on Zig Bee due
to the low consumption of power; because the technology
of life of the battery and handling of power are in constant
development and due to the bandwidth IEEE 802,11
available, Wi-Fi is an interesting technology.

14. Components of a sensor of
node WSN

15. CONCLUSIONS
 Wireless networks can be very boom in our country due to the need
for movement is required in the industry, this technology can be used
in conjunction with optical scanners in the area of footwear in our
town, to control the production of footwear, to determine exactly
where there have been delays and thus able to attack immediately
and do not stop production.
 Optical technology can be considered to be the most practical and
easy to implement because for radio technology must order licenses
for use of space to the SCT or you can break the law with respect to
this the SCT must have a lot of work because in big cities like Mexico
City, where space is very saturated radio frequencies am
radio, fm, business communication, and so on.,. We must be careful
if you want to buy the hardware for a wireless radio
technology, because we must be sure and have the approval of the
SCT

16. BIBLIOGRAPHY
 http://html.rincondelvago.com/redes-
inalambricas_1.html
 http://www.euroresidentes.com/futuro/avances_previ
sibles.htm
 http://library.abb.com/GLOBAL/SCOT/scot271.nsf/Ve
rityDisplay/A019E9833DCF2819C1257199004E5DD2/$F
ile/39-42%202M631_SPA72dpi.pdf