Literature Review 212t4q

LITERATURE REVIEW 2.1 Introduction This chapter gives a description of the various elements that have relations with home automation such as Android and its operation system as well as its development tools, the technology of Bluetooth and its module, and Arduino. Also, the chapter will give some examples of projects d with home automation systems. 2.2 Home automation system Home automation refers to the use of a computer to control home functions and other features of the home remotely and is also sometimes known as smart home. The home automation system can be utilized in the controlling of various process in the home such as turning lights on and off, programming appliances such fridge among others remotely. Currently installing a home automation system is still expensive, but it is believed that there may be a decrease with as the home media devices continue to become cheaper and therefore more people will opt for the system. Home automation is very much important in many broad areas, and to a greater extent, it can be used to improve the quality of life in people. One importance of home automation system involves its application in security aspects. Security cameras and sensors can be connected to home automation system and used to monitor activities around the house remotely. Another use of home automation system is in the elderly who have been impaired with physical mobility. Simple tasks may seem harder for people who are less mobile. The automation system can link up the tasks performed on a simple control thereby easing work for the elderly. For instance, opening and closing of curtains can be eased through using a motor that is controlled remotely using a phone line or a computer [1].

Home automation system example 1 [2]

Home automation system 2 [3]

2.3 Arduino Arduino is a physical processing device based on a microcontroller board and an integrated development environment for the programming of the board. Arduino is an open source hardware technology one of the best platforms out there that can be used to build home automation system. This technology can be used to control such applications as lights and sensors through reading them as inputs and turning them as outputs like activating a motor, switching on lights or online publishing of something. It is possible to tell the board what needs to be done through sending s eat of instructions to the microcontroller . to effectively achieve this the programming language of Arduino which is based on wiring and the Arduino software (IDE) which is based on processing must be used. The program forming Arduino can run on various operating systems such as Windows, Macintosh, and Linux [4].

An example of Arduino board with Arduino logo [4] 2.3.1 Reasons for choosing Arduino The program is simple and accessible; thus, it has been used in numerous projects. Arduino is easy to use for novice and also flexible enough to cater for advanced s. So anyone

can use it including children, programmers among others by just following the step by step instructions of the kit. Teachers and students sometimes use it to develop low-cost scientific instruments so as to prove the principles of chemistry and physics or at times to get started with the programming involved in robotics. There are several microcontrollers and microcontroller platforms used for physical computing such as Netmedia’s BX-24, Parallax Basic Stamp, Phidgets, and so forth. Arduino makes the process of working with microcontrollers much easier and provides several advantages for all the individuals interested over other systems such as:  Cheap compared to other microcontrollers with some modules costing as low as $50.  Uses various platforms of making a cross-platform. For instance, it can work in various operating systems, unlike other microcontrollers which only work with windows.  Simple to use with a clear programming environment making it suitable for any person who would wish to become well acquainted with it.  The program is an open source whose language can be expanded through C++ libraries so as to suit ’s preferences.  Easy to improve as it is an open source and extensible hardware and therefore, experienced circuit designers can easily their own versions of the module and improve it as deemed fit [4].

2.4 Bluetooth 2.4.1 Bluetooth Technology Bluetooth refers to the foundation for transformative connectivity that uses wireless feature. A Bluetooth device uses radio waves to connect to the computer or a phone. Most devices contain like headsets or watches contain a tiny computer chip with a Bluetooth radio that enhances connectivity. Bluetooth technology can be used in various places such as homes, schools, cars, and so forth. Despite all these uses, one major interest for focusing on Bluetooth is

its application on home automation systems. There are advantages that come along with using Bluetooth such as beings secure, strength, low consumption of energy, low cost, and ease of use [5].

Image credit: Bluetooth 2.4.2 How Bluetooth functions Like Wi-Fi, Bluetooth uses the FHSS technique which involves the splitting of the frequency band of 2.4 GHzinto 79 channels referred to as hops, and each one of them has 1MHz. Bluetooth has the ability to switch channels at 1,600 times a second thereby making it avoid interferences with other signals of the radio [6]. 2.4.3 Uses of Bluetooth As already mentioned, Bluetooth can be used in many appliances ranging from cars to cell phones all the way to headsets. With the Bluetooth innovation, it is possible to text, listen to music and even control data between gadgets remotely.

Uses of Bluetooth 2.4.4 Importance of Bluetooth in creating home automation system Bluetooth has turned out to be an ideal solution for home automation. It is easy to control temperature and other electronic devices using Bluetooth although to a greater extent a computer may be involved. It is possible to use a remote mobile with a host controller to communicate to several home appliances using Bluetooth as a wireless device. This involves use of a wireless network. Client module and the host controller communicate through enabled Bluetooth in a smartphone [7].

Home automation using Bluetooth [7]. 2.4.5 Bluetooth Module Bluetooth module is important in connecting the Arduino-UNO board and an Android device. The hc-05 module of Bluetooth is more compatible as it consists of a serial interface and a Bluetooth adapter. The module is -friendly as it does not require any setting after purchase apart its AT mode which is used to switch between master and slave mode. In this project, however, the slave mode was used [8].

Bluetooth module [8] 2.5 Android 2.5.1 Introduction to Android Most of the contemporary phones, TVs, tablets, and set boxes use Android. Android has been in business since 2008, and there is a likelihood that it will soon penetrate the motor vehicle industry and other industries that use entertainment. Andy Rubin developed the Android system

for phones, and he was later made the director of mobile platforms when Google acquired the Android Inc [9]. All Android phones come with an application known as play store (initially known as Android market) and it is used to Android applications. Play store contains numerous Android applications which can be used to execute various functions as required by a . Android comprises various layers where the applications need to follow to get to the hardware. There is a few accessible libraries and ARM architecture which forms the principle equipment platform for Android.

Android design [10] 2.6 Examples of Home automation in the real world.

Loxone does most of the house automation systems as part of their project. For instance: The Bluegrass Smart Home This was the first Loxone Smart home opened to the public. All that is required is to book an appointment and get to know the kind of comfort this house offers right away from security to energy saving [11].

The Victorian Townhouse This house is nestled in a quiet street some distance away from Richmond-upon-Thames. The exterior may look traditional, but the inside is modernized, sleek and stylish smart home that has all the controls d with home automation system [11].

References [1] J. Griggs, P. McKenna and M. Koerth-Baker, "Top tech for a cooler planet", New Scientist, vol. 204, no. 2728, pp. 36-39, 2009. [2]"Home Automation System", Mtechengineer.com. [Online]. Available: http://www.mtechengineer.com/products/home-automation-system.html. [Accessed: 11Dec- 2016]. [3]"Understanding Android Based Home Automation Systems", ElProCus - Electronic Projects for Engineering Students. [Online]. Available: https://www.elprocus.com/understandingandroid-based-home-automation-systems/. [Accessed: 11- Dec- 2016]. [4]"Arduino - Introduction", Arduino.cc. [Online]. Available: https://www.arduino.cc/en/Guide/Introduction. [Accessed: 11- Dec- 2016]. [5]"How it works | Bluetooth Technology Website", Bluetooth.com. [Online]. Available: https://www.bluetooth.com/what-is-bluetooth-technology/how-it-works. [Accessed: 11Dec- 2016]. [6]"Bluetooth - How it works", CCM. [Online]. Available: http://ccm.net/contents/69-bluetoothhow-it-works. [Accessed: 11- Dec- 2016]. [7] B. Malik, "Bluetooth based home automation system using android phone", Microcontrollers Lab, 2016. [Online]. Available: http://microcontrollerslab.com/bluetooth-homeautomation-system-android/. [Accessed: 11- Dec- 2016]. [8]"Bluetooth Controlled Home Automation System Using 8051 Microcontroller", Circuitdigest.com, 2016. [Online]. Available: http://circuitdigest.com/microcontroller-projects/bluetooth-controlled-home-automationusing-8051. [Accessed: 11- Dec- 2016].

[9] A. Goransson and D. Cuartielles Ruiz, Professional Android Open Accessory with Android ADK and Arduino, 1st ed. Hoboken, N.J.: Wiley, 2013. [10] D. Han, "Android, at a glance | CUBRID Blog", Cubrid.org. [Online]. Available: http://www.cubrid.org/blog/dev-platform/android-at-a-glance/. [Accessed: 11- Dec2016]. [11]"Loxone Smart Home - Media, PA, US 19063", Houzz, 2016. [Online]. Available: http://www.houzz.com/pro/loxoneus/loxone-smart-home. [Accessed: 11- Dec- 2016].