This document describes a touch screen and Zigbee based control system for apartments using an embedded system. The system uses a microcontroller, touch screen, Zigbee modules, and other components to allow users to control home appliances in their apartment wirelessly via the touch screen or voice commands. The microcontroller interfaces with the touch screen, Zigbee modules, and other devices. It receives input from the touch screen or other inputs and sends wireless signals via Zigbee to control appliances like lights and fans. The system aims to provide a compact, user-friendly, and low-cost way to remotely control home appliances within an apartment.

1. TOUCH SCREEN AND ZIGBEE BASED CONTROL SYSTEM
FOR APARTMENTS BASED ON EMBEDDED SYSTEM
R.shanmuga vadivu, M.Sc., Electronics, Seethalakshmi ramaswami college, Trichy, Tamil nadu.
Abstract:Embedded Technology is now in its prime and the wealth of knowledge available is mind blowing. A system
is a way of working, organizing or doing one or many tasks according to a fixed plan, program, or set of rules. An
embedded system is a one that has computer hardware with software embedded in it as one of its most important
components, with a dedicated function within a larger mechanical or electrical system, often with real-time computing
constraints. It is embedded as part of a complete device often including hardware and mechanical parts. By contrast, a
general-purpose computer, such as a personal computer, is designed to be flexible and to meet a wide range of end-user
needs. Embedded systems control many devices in common use today.
Modern embedded systems are often based on microcontrollers but ordinary microprocessors are also still
common, especially in more complex systems. In either case, the processor used may be types ranging from rather general
purpose to very specialised in certain class of computations, or even custom designed for the application at hand. An
Embedded System: It is a combination of hardware and software to perform a specific task. It has five main components:
a)Real Time Operating System (RTOS) b) microcontroller
c) Integrated chips d) Industry e)Printed circuit board
assembly which supervises the application software and provides a mechanism to control various processes. Embedded
system is now explained with specific task which contains hardware and software controls various processes. Since the
embedded system is dedicated to specific tasks, design engineers can optimize it to reduce the size and cost of the product
and increase the reliability and performance.
In this paper we are using primary data dealing with touch screen and zigbee based control system for
apartments. By touching and voice replaying we can control the home appliances using zigbee.
Introduction:Embedded systems have become an integral part of daily life. An embedded system is
a combination of computer hardware, software, and additional mechanical or other technical
components, designed to perform a dedicated function. Be it a cell phone, a smartcard, a

2. music player, a router, or the electronics in an automobile - these systems have been touching
and changing modern lives like never before. Most of the embedded systems need to meet
real time computing requirements. a)Real time operating system (RTOS) b)hardware c)
software. In this paper the home appliances are used in apartment is controlled using
zigbee and touch screen.
Key words:- Microcontroller PIC and ATMEL, zigbee, touch screen, APR
9600.
Functions:
The uppermost layer is the application layer. In-between, there are other layers
which
may comprise components like device drivers and communication protocols. A
special genre of operating systems known as the real-time operating system (RTOS) is
usually required to cater to the deadline-driven requirements of an embedded system. The
lowermost layer comprises the printed circuit board that accommodates all the semiconductor
devices, buses and related electronics.
With increasing functionality, the selection of a particular technology, standard and
functionality for the next product release is at times a tough call for product managers and
architects. While a focus on innovation, upcoming standards and enriched user experience is
required, it is a challenge to decide which technology and idea to pursue and nurture.
Embedded systems are deployed in various applications and span all aspects of modern life.

3. Touch screen:
The touch screen panel consists of an insulator. The different values of
variable are used to as the input of touch screen. The analog output is given to
microcontroller.
Keypad:
The keypad is generally used for typewriting. In
this block diagram
keypad is used instead of toggle switch. Is the input of keypad. The output is given to
controller.
LCD:
The liquid crystal display is a thin flat electronic visual display. The
analog signal from microcontroller is the input of LCD. The value will be display is
the output of LCD.

4. ZIGBEE:
The zigbee is the main part of block diagram. The output of
microcontroller is a input of zigbee(1). The output is given to another zigbee(2).
The data transmitted
from zigbee(1)’s output as a input of zigbee(2). The data is
received and the output is given to microcontroller.
Microcontroller:-
8-bit controllers were widespread for quite a long time and are still powering a multitude of
embedded applications, for instance, in home appliances, smartcards and automotive body
electronics. To cater to the need for higher performance, these controllers advanced
towards16-bit to 32-bit, as used in routers, cell phones and media players.
New applications in the areas of imaging,
rendering, compression, multimedia and recognition demand higher bandwidth, enhanced
processing capabilities, quicker response times and more efficient algorithms. There is a
definite requirement of processors with multiple cores that would improve the throughput of
the application while reducing power consumption, cost of operation and increasing
reliability. Thus, semiconductor companies have introduced a single chip comprising multiple
cores. Microcontroller: The microcontroller that has been used for this project is from
PIC series. The analog signal which is got from touch screen is the input. The output is
fed into the ZIGBEE.
Many of the gaming consoles and network processors use multicore processors.The output
of zigbee (2) and keypad is the input of microcontroller. The output is given to
APR9600 and the driver circuit.

5. APR9600:
The APR9600 is used as voice recording and replaying. The output
of keypad and microcontroller is the input of APR9600. The ouput is given to the
speaker.
WIRELESS:
For a long time, embedded devices were mostly operating as stand-alone systems. However,
with the advent of wireless connectivity, the scenario has changed. Both, short-range wireless
protocols like Bluetooth, Zigbee, RFID, near field communications (NFC) and long-range
protocols such as, wireless local area network (WLAN), WiMAX, long term evolution (LTE)
and cellular communications are bound to witness more widespread applications in the
near future. The recent trends in wireless for use in embedded systems are in the areas of
system-on-chip (SoC) architecture, reduced power consumption and application of short
range protocols.
Short range protocol:
Zigbee is a consortium of more than 200 major players seeking to tap into the
potential billion-dollar market of wireless sensor networks. The fundamental concept behind
this consortium is interoperability between the devices manufactured by different vendors. To
certify a device as Zigbee -enabled, one needs to comply with certain standards other than the
routine RF regulatory tests. For all such cases, the MAC protocol is the standard defined
by IEEE as 802.15.4. It is possible to define a better algorithm (like an energy-efficient
routing protocol for very large networks) without using either IEEE MAC or the Zigbee
stack.

6. Software:
KEIL:-
Keil development tools for the 8051 Microcontroller Architecture support every
level of software developer from the professional applications engineer to the student just
learning about embedded software development. The industry-standard Keil C Compilers,
Macro Assemblers, Debuggers, Real-time Kernels, Single-board Computers, and Emulators
support all 8051 derivatives and help you get your projects completed on schedule.
Simulator:
The Keil hardware simulator for the popular 8051 microcontroller is on the CD-ROM
so that readers can try out examples from the book - and create new ones - without requiring
additional hardware. All code is written in C, so no assembly language is required. Industrystandard C compiler from Keil software is included on the CD-ROM, along with copies of
code examples from the book to get you up and running very quickly. Key techniques
required in all embedded systems are covered in detail, including the control of port pins and
the reading of switches. A complete embedded operating system is presented, with full source
code on the CD-ROM.
Result and Discussion:
The progress in science & technology is a non-stop process. New things and new
technology are being invented. As the technology grows day by day, we can imagine about
the future in which thing we may occupy every place.
The proposed system based on
Atmel microcontroller is found to be more compact, user friendly and less complex, which
can readily be used in order to perform. Several tedious and repetitive tasks. Though it is

7. designed keeping in mind about the need for industry, it can extended for other purposes such
as commercial & research applications. Due to the probability of high technology (Atmel
microcontroller) used this “TOUCH SCREEN AND ZIGBEE BASED CONTROL
SYSTEM FOR APPARTMENTS” system is fully software controlled with less hardware
circuit. The feature makes this system is the base for future systems.
It is also likely that embedded systems will embrace the cloud computing paradigms, as is
happening in the non-embedded world. So, it might be possible for instance, to have the
RTOS, storage areas or other special software in the cloud and have the embedded
applications access them through internet connectivity. Changes in the embedded world are
occurring even as this paper is being published. It is always going to be smaller, faster, and
superior in the embedded world!
The principle of the development of science is that “nothing is impossible”. So we shall look
forward to a bright & sophisticated world.
REFERENCES:
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2. “Giving NFC a smarter and brighter future, Wireless Asia, October 2008
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5. http://www.eetimes.com/news/semi/showArticle.jhtml?articleID=211800286
6. http://www.vdcresearch.com/_documents/pressrelease/press-attachment-1394.pdf