Full Project – Controlling home appliances remotely through voice command

Full Project – Controlling home appliances remotely through voice command

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1.1       Background to the Study

Home automation control system (HACS) is not a new concept a lot of work has done in this field and many solutions has proposed. Some of them have used internet and wireless technology to communicate and control the appliances(Tam et al, 2007; & Anamul, Kamruzzaman and Ashraful,2006 ).  Others have used Bluetooth or GSM technology to send the command for controlling the home appliances(Malik, Aihab & Erum,2009; Jia-Ren & Cheng-Chi, 2004).

Problem domain related to proposed technique is telecommunication remote automation of home appliances thorough telecom technology.  The proposed research provides the cost effective system that helps to satisfy their security concerns of home related to daily life such as controlling the home appliances and intrusion detection through voice message(Murthy,2008).  This system can be used in any environment. It is free from the geographical limitations and can be used every where being the GSM network available.

It is affordable to everyone as no expansive hardware is used in it. Cell phones are very common these days and almost everyone can make a call very easily. That’s why cell phone is used in this system that makes it real world application. It is free from the geographical boundaries and can be used from anywhere where GSM is available. The proposed solution is to implement the HACS through voice command that controls the home appliances by making a call from the preconfigured number to system and receive the voice message from the system to preconfigured number about the status of appliances bover the GSM network.

AT commands are used to automatically receive the call on system from the preconfigured number and system also sends the voice message to preconfigured number about the status of appliances and intrusion through AT commands. Microsoft speech SDK 5.1 is used to reorganization of speech. Hence it is a research based real world project and is useful for working people and for those who live alone or stay out of their homes most of the time.

The aim of this project is to develop a device which control home appliances via human voice. Google Voice search software will be used as voice capture device. The Graphical User Interface (GUI) will be created using Android Meets Robots software (AMR). For this project this system is called voice controlled electrical appliances. This is a project to produce a system that can control any electrical appliances by using user’s voice. User’s voice is an input to activate the electrical appliances through this system. This system can make the daily work at home easier for disable persons who use this system. Speech recognition software converts spoken words to machine readable input. The term voice recognition may also refer to speech recognition but more precisely refers to speaker recognition which attempts to identify person speaking as opposed to what is being said. With today’s computer technology human voice can be recorded and saved into computer memory for future references. This system needs a GUI (graphical user interface) which provided by Android Meets Robots software. This software is used to build a graphical user interface and programming that can recognize the voice of human. The recognized voice can activate the electrical appliances that user want to use. The system is portable and constructed in a way that is easy to install, configure, run, and maintain.

The perfect user interface still does not exist at present and to build a good interface requires knowledge of both sociology and technology fields. According to major companies that are involved in speech recognition researches, voice will be the primary interface between humans and machines in the near future(Conte & Scaradozzi,2003).  The problem lies with the situation of the elderly or disabled people, who cannot usually help themselves to move around, and might require external assistance. People who live alone might also need a helping hand at home. Therefore a voice controlled home automation system is designed, so that the users can perform certain tasks by just the use of their voices, moreover, the system is designed to have a hand-held device(mobile phone) as a remote so that the user can easily speak their commands, otherwise they would have to walk over to the microphone to speak. Having a mobile phone as a remote will make the system more user-friendly and portable.

Voice controlled home automation systems have drawn considerable attention in the recent years. Initially, home automation systems were designed for the people seeking luxury and sophisticated home. But, there was always a need to develop home automation system for the people with special needs like the elderly and the disabled. According to a report published by the World Health Organization (WHO) around 785 million people of 15 years and older live with disability (Obaid et al ,2014). Of these, the World Health Survey reports that 110 million people have significant difficulties in functioning. Another report published by the Population Division of United Nations show that about 10% of the World’s population is older than 60 years and it is estimated that this figure will reach up to 21% by 2050 (Obaid et al, 2014). In order to assist the old people and the people with disability home automation technologies are adopting voice control or voice recognition techniques. The main idea is to control and monitor home appliances by using voice command.


1.2       Statement of the Problem

The problem associated with the existing system is that, generally conventional home using simple latching switch that being connected to the power supply for controlling electrical appliances such as lighting. This switch usually located at wall in sight of the controlled appliances.

Nowadays new technologies create new solution for home system. This improvisation called home automation. There have been several commercial and research projects on smart homes. Many of the commercial products use remote control whether it has button or fully touch screen. Still, monitoring and controlling the appliances need some movement and physical contact. Thus, this will be a burden to disable person especially for the disabled and elderly people. As for this project, the proposed solution is to develop a wireless remote control for the home appliances which can be controlled using voice. This system include Graphical User Interface (GUI) features to guide the user which also using voice.


1.3       Aim and Objectives of the Project

1.3.1    Aim of the Study

The aim of the research work is to design and implement a Controlling Home Appliances Remotely through Voice Command.

1.3.2    Objectives of the Study

In order to achieve this aim, the following specific objectives are formulated:

  1. to review the existing Controlling Home Appliances
  2. to design and develop a new system based on the findings above.

iii.        to implement the new system based on remotely through voice command.




1.4       Research Methodology

This research work implements Hidden Markov models (HMMs), widely used in many systems. Language modeling is also used in many other natural language processing applications such as document classification or statistical machine translation.  Modern general-purpose speech recognition systems are based on Hidden Markov Models. These are statistical models that output a sequence of symbols or quantities. HMMs are used in speech recognition because a speech signal can be viewed as a piecewise stationary signal or a short-time stationary signal. In a short time-scale (e.g., 10 milliseconds), speech can be approximated as a stationary process. Speech can be thought of as a Markov model for many stochastic purposes.  Another reason why HMMs are popular is because they can be trained automatically and are simple and computationally feasible to use. In speech recognition, the hidden Markov model would output a sequence of n-dimensional real-valued vectors (with n being a small integer, such as 10), outputting one of these every 10 milliseconds. The vectors would consist of cepstral coefficients, which are obtained by taking a Fourier transform of a short time window of speech and decorrelating the spectrum using a cosine transform, then taking the first (most significant) coefficients. The hidden Markov model will tend to have in each state a statistical distribution that is a mixture of diagonal covariance Gaussians, which will give a likelihood for each observed vector. Each word, or (for more general speech recognition systems), each phoneme, will have a different output distribution; a hidden Markov model for a sequence of words or phonemes is made by concatenating the individual trained hidden Markov models for the separate words and phonemes.  User used visual basic 6.0 language for writing the codes on developed system and created two files with extension of .exe renaming them as ON and OFF. Setting the voice command on interfaces and embed the directory of the exe files. Ardunino-1.5.7-windows are the software for arduino need to be installed in laptop. User used ATMEGA2560 Arduino. There the codes are written in visual basic 6.0 it will pass 1 for On and 0 for Off. If the Arduino got “1” from the serial communication(led, HIGH) hence LED will be on else if the Arduino got “0” from the serial USB port of the laptop to the Arduino port via com port where it has been connected. User can program as many as code will want to control in our home just using a relay user can simply power it On and Off just by calling the filename user saved as.


1.5       Scope of the Project

This project is about the development and implementation of a GSM based password protected control system for electrical home appliances that enables to control remotely. GSM module is used for receiving voice command from user’s mobile phone that automatically enable the controller to take any further action such as to switch ON or OFF the home appliances such as lights, air-conditioners, fans, water pumps, door locks, TVs etc. Hardware of the system has been developed using an Arduino Uno board, a GSM modules, some switching relays and some other easily available electronic components. The driving software has been made using the Arduino IDE. The system is activated when only the user sends the voice to the controller at home with the exact password. Upon receiving the voice command, the microcontroller unit will decode the received voice automatically and controls the electrical home appliances by switching ON or OFF the device according to the user direction.


1.6       Significances of the Project

This project work is to centrally manage all the controlling home Appliances, remotely through voice command.  The significances of this project includes:

  1. Controlling appliances is a main part of automation.
  2. The main object of Home automation is to provide a wireless communication link of home appliances to the remote user.

iii.        The main objective of this work is to make such a system which controls the home            appliances remotely. This project discusses two methods of controlling home appliances        is via voice to text SMS and other is to use the mobile as a remote control, this system      will provide a benefit to the elderly and disable people and also to those who are unaware         of typing an SMS.


1.7       Limitation of the Project

The research project is limited to controlling home appliances remotely, through voice command. While other area will not be cover due to time constraints.




  • Definition of Terms

Capacitor: This component stores charge. It filters the output of bridge diode to eliminate the ripple in the output signal.

Computer:  a computer is advice like a machine that works under the control of stored programs, automatically accepting and storing, processing data to produce information that is the result of that processing.

Computer System Software: A set of written instruction, which the programs use to computer system.

Data: Bit and pieces of fact and figures representing an idea or event needed for processing to give out information.

Data Entry: This is the standard input device through which the system gets more of the instructions and commands

Database: It is an organized collection of data for one or more purpose usually in digital form.

Voice: search software will be used as voice capture device.

Field:  A unit of information containing a group of related data.

Hardware: This is the general term used to describe all the electronic and mechanical elements of the computer together with those devices used with the computer.

Information: When data undergoes certain manipulations like calculation, sorting, amending etc. they eventually become useful meaningful. In other words, they become information.

Online Processing: Also called transaction processing,. It is the collecting and processing of data as transaction occurs.

Project: A piece of planned work or an activity which is finished over a period of time and intended to achieve a particular aim.

Program: Set of instructions which are logically related in sequence and which describes actions to be taken by the digital computer in providing a solution on to a given problem.

Real Time Processing: Technique by which enter data for immediate processing.

System: – A system is any group of objective related or interacting so as to form a unit.

Software: Is the general term used to describe all the various programs that may be used on a computer system together with their associated documentation their with their associated documentation.


1.9       Project Layout

Chapter One: This chapter discusses the introduction about the topic, pointing out details of the topic in wider view. The background of the study is discussed, statement of the problem is emphasized, the aim and objectives of the project is also covered in this chapter, Research methodology is also employed, significances of the project is also discussed, the scope of the study is also discussed after which the limitation of the study is stated. Further in the chapter, the definition of terms is stated.

Chapter Two: This is the chapter in which various literatures are reviewed; this chapter requires the referencing of existing relevant literatures on the project topic. In this chapter, much explanation of the topic is made containing views and contributions of authors who have worked on the exact or related topic in time past.

Chapter Three: This chapter covers the methodology and system analysis, the methodology focuses mainly on the approaches employed in carrying out the research i.e. how, where and mode with which researches were made. All the tools and methods used in gathering facts about the project are discussed under the methodology.

Chapter Four: The chapter four deals with the design and implementation of the system, input and output design, program design, system testing, programming language used and system implementation.

Chapter Five: The chapter five is the concluding chapter of the project, it comprises of the summary of the project, conclusion on the project and recommendation to the project.

In this chapter, the student is expected to summarize the entire purpose of the project, give his/her conclusion about the project so far and lastly give constructive recommendations on the project after which the flowchart and program a controlling home appliances remotely through voice command are drawn.

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Full Project – Controlling home appliances remotely through voice command