SOLAR PV CONTROL SYSTEM.pdf

When we use these two technologies we can get better and battiest result of any
project. Wi-Fi enabled you to connect with internet without any wires but when you
are exist in the range of hotspot, because Wi-Fi works only in its specific range while
Bluetooth offering quick exchanging of data and sharing opportunity of printer,
laptop etc. In short the use of both technologies increasing day by day and both has
something to looking forward.
IEEE 802.15.4 and Zigbee
Introduction
IEEE 802.15.4 or Zigbee is a wireless personal area network (PAN) which can be
used in several areas. Some basic areas where it can be utilize are building
automation, control devices, personal healthcare, PC peripherals and consumer
electronics.
The main technology used to develop the wireless network for IEEE 802.15.4 and
Zigbee is based on the same layers which are physical (PHY) and medium access
control (MAC). The huge different between IEEE 802.15.4 and Zigbee is the ability of
which kind of topology can be provided by the network. More over the security level
in Zigbee is higher compare to IEEE 802.15.4. The IEEE 802.15.4 can provide point-
to-point and point-to-multipoint topology, called star topology, while Zigbee can be
used for the one’s mentioned above plus cluster tree and mesh topology. To achieve
the functionalities which Zigbee can provide two more layers from the Open System
Interconnection (OSI) is added and those are Network and Application layers.
Zigbee is a technology of data transfer in wireless networks. It has low energy
consumption and is designed for multi-channel control system, alarm systems and
lighting control. It has also other various home and industry applications. Zigbee is
more economical than WIFI while Bluetooth protocol also consumes more energy,
and has the greatest scattering of parameters of conventional like compatible units.
This is caused by the fact that Bluetooth does NOT have a unified data transfer
Email: david.irungu@stu.kuct.ac.ke
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2012