Generally, when the electrical equipment is plugged
in but it is not in use, there still has the flow of
electricity. That means we will lose the electrical energy
about five to ten percent of regularly usage, so that wastes
money for no reason. Moreover, that may also be cause of
many accident such as the conflagration from electrical short
circuit. Therefore, many people who always forget to unplug
the electrical device have to remind themselves every time
they go out. On the other hand, if they go out with forgetting
to unplug, they must go home to pull the plug out to avoid the
dangerous situations, so it is a waste of so much time. In
order to solve these problems, smart home technology will be
required. With the advance of technology, many research
projects about smart home have been developed in order to
facilitate human and improve their quality of living. A home,
which is smart, is the technology used to make all electronic
equipment around the home act “smart” or “intelligenat” or
more smart, is the technology used to make all electronic
around the home act “smart” or “intelligent” or more
automated that is to say smart home has highly advanced
automatic systems for lighting, temperature control, security
and many other functions

Smart home network technology can be classified into two
main types, which are wiring system and wireless system.
In wiring system, the equipment will be connected into the
main power supply directly, so the data will be sent to the
devices to activate or deactivate them. There are many types
of wires that people may want to install in-wall. Many homeautomations are connected through wiring system such as new
wire (twisted pair, optical fiber), Powerline, Busline, etc. An
example of outstanding technology is X10, which is open
standard for home automation. X10 transmits binary data
using the Amplitude Modulation (AM) technique.And X10
controllers send signals over existing AC wiring to receiver
modules. Other technologies are HomePlug, Consumer
Electronics Bus (CEBus), European Installation Bus, etc.
In the wireless system, there must have two main elements
that are sender and receiver. Many new appliances use
wireless technology to communicate with other devices. The
example of wireless communication system are microwaves,
Infrared (IR), radio frequency (RF), Wi-Fi, Bluetooth, IEEE
802.11, and so on. Furthermore, some of smart home network
standard can work using both wiring system and wireless
system. An example of wireless communication system for
smart home is Z-wave, which is a reliable and affordable
wireless home automation solution. Z-wave is a wireless RFbased method for instant remote control of appliances.

Smart home controlling devices are used for managing the
systems by sending data or signal to control the actuators. The
examples of the controllers are not only the remote control,
but they can also be smartphones, tablets (iPad, Galaxy tab),
web browsers and Short Message Service (SMS). Moreover,
some of systems may have computer which works as center of
the environment perception or the evaluation unit

The most heard about smart technologies are that of the
kitchen. An example appliances which are smart are
refrigerators, microwaves, coffee makers, and dishwashers.
The Internet Refrigerator applies the technology of smart
home to make many works much easier. There is Internet
enabled and allows for users to communicate with it via the
Internet, so it is able to download recipes and then display
them on its LCD screen. Moreover, the refrigerator also takes
an automatic inventory of items inside of it and it can alert the
users to what is there. What’s more, microwaves are also
smart. Microwaves can communicate with smart refrigerators
and suggest recipes based on the food items available in the
refrigerator. The microwave can even be set to start at certain
times while users are away from home.


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