Implementation of an Efficient Smart Home System using MQTT

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056
Volume: 04 Issue: 03 | Mar -2017 www.irjet.net p-ISSN: 2395-0072
© 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 1848
Implementation of an Efficient Smart Home System using MQTT
B.S.S.Tejesh1, S. Neeraja2
1B.S.S.Tejesh, P.G. Student, Dept. of ECSE, KL University, Guntur.
2S.Neeraja, P.G Student Dept. of ECSE, KL University, Guntur.
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Abstract - This paper aims to provide a smartsystemwhich
scales down the workload of working staff, contributing
additional services, integration withthehomeenvironmentby
employing a community broker. The home environment
consists of a smart home controller, sensors, devices that
transfer information for the purpose of enhancing security.
The community end consists of a central server, element like a
personal computer which has the ability of associating with
the devices that are in remote locations. The interface devices
are employed so as to avoid the confusion between the
functionality and user interface. The paper aims on both
MQTT as well as HTTP services. The MQTT desires to
implement services in smart home systems. The HTTPgoverns
the transferring of location based data.
Key Words: Community broker, MQTT, HTTP, cloud
services, Smart Systems.
1. INTRODUCTION
Day by day so many technologies are developing. In that the
smart home systems are having a tremendous growth of
normal network to home automation. Though the smart
home technologies are being used currently but they are
limited to individual houses. With the era of IoT, the
traditional controlling systems are transforming to smart
home systems. The smart home technologies areintegrating
with the IoT.
For best performance, to provide more services, effective
management the cloud based services are coordinating with
the smart home technology. The energy management
systems in the home environments are equippedbothinside
and outside environments of the home. There may be issues
regarding management. In real world approach the facilities
like data and service sharing schemesamongseveral entities
is only possible by the community broker system. The
community broker is a significant feature in this research.
The facilities like managing devices in the home
environment is possible with the aid of community broker.
The community broker provides many services like
electronic services, labor requirement is eliminated. The
location based services are implemented with the
combination of community services and cloud services
operating together. The MQTT protocol to provide control
features in the smart home system. The HTTP protocol
employed for transferring location based information.
2. RELATED WORK
In this paper the smart devices, multiple displays, cloud
based services are the three classifications which are
discussed below.
2.1 Smart devices
The Home energy management systems studies are being
transformed from energy management in simple electrical
appliances or devices to major or complex electrical
appliance energy management. The data from home devices
integrates withthecloudplatformfordeliberatelyincreasing
more services and security [1-3].TheRenewableenergylike
solar energy which is produced by the solar panels are
causing issues with community spaces and HEMS spaces. It
may also lead to overlap the operations andmaintenance [4-
6]. The smart home system provides thefeatureslikestoring
the data as well as access the information. The Safety in the
home environment is mostly needed. The safety can be
provided by integrating various sensors in the home
environment [7-12]. In the smart home the functionalities
like health care services can also be implemented with the
use of cloud servers [13-15]. The sensor technology can
facilitate more facilities like recognition of hand-gesture,
activities involving in the detection of photos, recognition of
emotion in the videos are some of the features enhanced in
the sensor technology [16-19].
2.2 Multiple displays
Many display devices are there in this modern world.
According to the convenience of the user, the user may
utilize devices like tablet, PC, Phones. The user can operate
or see the data of the devices with the display system [20],
[21]. In the conventional interfaces the Televisions serve as
home display devices. The integration of various sensors,
enhancing of additional services is the new approach for
multiple display [22], [23].
2.3 Cloud based services
For achieving high end automations in a home environment
the servers and smart home system are equipped for the
functionalities of authentication concern, multiple devices,
privacy in data [24]. The smart home systems are being
transferred into an intelligent system in the indoor and
outdoor environments [25]. The challenges that are faced
while employing both the cloud services and smart home
systems is with the user terminals, servers must be

integrated for data communication, software must betimely
updated so that additional featurescanbeprovided,security
must be enabled for data sharing between groups, local
servers are employed for the fault diagnosis [26-277].
3. Proposed system Architecture
3.1Architecture of the overall system
In the smart home systems, the system is integrated in a
single home with various sensors. The community
networking facilitates the integration of single smart homes
into a cloud server with the internet. The cloud platform
provides added services by theintegrationofglobal services.
The information can be transmitted by using wired or
wireless connection between the home controller and other
devices. The community management system provides all
the facilities that a mart home requires.
3.2 Proposed System architecture
The Figure 1 which describes the componentsthatproposed
architecture consists. The proposed architecture consists of
a home controller system, community management system,
cloud platforms. The conversion of sensors, to enable
security, reporting the energy consumption are done with
the Home controller system along with the digital input and
output lines, USB cable, RS 485 wiring system. The features
like home management,communicationwithcloudplatform,
central control system are managed in the community
management system. The cloud platform enablestheremote
control and analysis of data from the devices. The smart
services can be enhanced by integrating additional services
and third party modules.
Fig -1: Proposed System Architecture.
3.3 Setting of devices at home
The figure 2 Shows the common interface, device settings,
which are done in the home environment. Some common
interfaces like LAN, digital input,output,Universal serial bus,
RS 485 are equipped with the home controller system. By
Local Area Network the home Network can be employed
with the community network.
The physical devices such as magnetic reed switches, gas
sensor are interfaced with the digital input and output lines
of the controller systems. With the use of relays thelightand
curtain control mechanism is employed. The Rs-485 system
used for analog Input and output conversions for the power
meters, water meters, Temperature sensor, fire sensor, CO2
sensor. The Universal serial bus enables to extend the
wireless devices by implementing the Zigbee protocol.
Fig -2: Predefined Interfaces of the system.
3.4 Functions in the community system
The figure 1 describes the detailed functions in the
community management system. The community
management acts like a gateway for providing services and
also as a home management module. The security guards in
the home are provided with the administrative role for
managing residential affairs with a Graphical user interface.
The GUI is used for creating logs of all the operations, also
enabling security system, automating system.
3.5 Services and modules in the Cloud Platform
The figure 3 describes the services and modules that are
involved in the cloud platform. The cloud platform provides
a core management module and global service module. The
core management module enables management,
maintenance, remote control. The management,
maintenance module provides home monitoring activity.
Here the information from the devices is collected and some
analysis is done. The remote control facilitates an HTTP
based authenticationandauthorizationfor enablingsecurity.
The global service module integrates many value added
services and third party applications that mainly
concentrates on location based application, personal
application, health care, Government information.

Fig -3: Platform services and modules on a cloud.
4. Implementation results and discussion
The home controller system consists of a total of six digital
input devices, five digital output devices, RS-485, Universal
bus interface. An integrated cabinet is used to maintain the
overall performance of the home controller system, Water
meter, power meter, network devices, relays and the
required power supplies. The home controller system is the
main element in the developed system, water meter and
power meter are used to log the readings of power and
water consumed, The network devices are used to enable
communication with the outside world, the relays are used
for voltage conversions. A touch panel is arranged at the
entry of the door with all the functionalities of the devices.
The magnetic reed switches are arranged at the doors and
windows to enhance the security. The magnetic reed
switches are activated whenever the doors or windows are
opened. The activity of the magnetic reed switches is
uploaded into the web server so that users can manage
remotely. With the employment of PIR sensor more security
enhancements are done. The PIR sensor is activated
whenever there is a movement in the surroundings. The
Emergency buttons are equipped with all the rooms.
Whenever users, pressesthe emergency buttonsthesecurity
alerted. The details of buttons are also logged into the web
server. To prevent accidents due to any conditions in the
home environment, the sensorsliketemperaturesensor, fire
sensor, CO2 are used. The temperature sensor measures the
room temperature and logs all the measured data into the
web server. The fire sensor is activated wheneverthesensor
detects any fire flame in the surroundings. The CO2 sensor
measures are there any poisonous gases in the home
environment. The data of these sensors are logged into the
web server and also can send to the user via the mobile
phone. The context-aware homeautomationfacilitatesusers
with the remote ON/OFF of electrical appliances,
OPEN/CLOSE of curtains in the rooms.
Fig -4: Web Server Results.
The Figure 4 represents the data from the devices and
sensors into the web server. The 0’s represent the Magnetic
switch, IR, PIR, CO2 sensor is in off stateornotactivated.The
1’s represent that the IR, PIR CO2 sensors are in on state or
Activated. The temperature sensor logs the values on the
Web server. The Meter readings ofpowerandWaterarealso
logged in the web server. The lights, Curtains, emergency
button’s state are represented by either 0’s or 1’s. The 0’s
state results in OFF state and 1’s represents the ON state. All
the devices and sensor values are updated with the time
stamps.
Fig -5: MQTT status updating on the cloud server.
Fig -6: MQTT request and reply from the cloud
server.
The Figure 5 represent the Updation of device status on the
cloud server, Figure 6 represents the request andreplyfrom
the cloud server. The implemented architectures can use
conventional HTTP and MQTT protocol. The MQTT protocol
operates on consuming less energy. The HTTP protocol
operates on consuming more energy. On comparing the

latency between MQTT and HTTP, the MQTT servers has
lower latency and perform dynamically than the HTTP
servers. The MQTT servers operate on low data traffic, but
HTTP operates and consumes high data traffic. On the basis
of the above comparison, it can be concluded that the MQTT
architecture is more beneficiary. As the devices in the home
may be increased or decreased thismayreflectintheload on
the community broker. In comparison with the traditional
client-server architecture, the implemented client-server
architecture can be scaled. The bandwidth of the core
network and computational capacity of the cloud are
managed efficiently in the proposed architecture.
5. Conclusion
The proposed smart home system is veryefficient,itreduces
manual labor, provides electronic services to the users. The
system functionalities can further be enhanced by the
implementations of more services. The MQTT and HTTP
protocols are also compared based on the energy
consumption, latency, data traffic. This system has a simple
Graphical user interface where children, old people can
easily understand. The developed system is not only
confined to the experimental setup, but can also cope up in
real world applications.
ACKNOWLEDGEMENT
The Authors B. S. S. Tejesh, S. Neeraja are greatly thankful to
the KL University authorities for providing necessary
infrastructure facilities to carry out this project work.
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BIOGRAPHIES
B.S.S.Tejesh was born in
Vijayawada. He completed his
B.Tech ECE in Vignan University in
2015. He is currently doingM.Tech
on Embedded Systems, 2nd year in
KL university.
S.Neeraja was born in Guntur. She
completed her B.Tech ECE in
Nalanda College in 2015. She is
currently doing M.Tech on
Embedded Systems, 2nd year in KL
university.

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