Vol.4 Issue 1
International Engineering Journal For Research & Development
Impact factor : 3.35
E-ISSN NO:-2349-0721
WIRELESS BROADCAST SYSTEM FOR INSTITUTIONS Pratik Dhomane, Prasad Jarulkar, Rohitkumar Lonkar, Amit Chambhare U.G. Student, Prof. Ms. V.G.Nasre, Department of Electronics & Telecommunication ,Priyadarshini College of Engineering, Nagpur,
Maharashtra, _______________________________________________________________________________________ ABSTRACT
INTRODUCTION
In this paper, we describe a wireless
The time table ,the schedule , notice and
broadcast system for institutions that we have
news of has to be given to the students or staff.
developed using open-source hardware platforms,
This will be done by writing the details on the
Raspberry Pi and zigbee. The system is low-cost,
notice boa rds. But this process consumes a lot time
low power consuming and highly scalable.This
to update the news on all the notice boards and
system is well suited for displaying immediate
there may be chances that the person responsible
notices immediately in less time for institutions. It
may commit some mistakes or he may be absent
has wide range of applications ,for example in
sometimes. So, this may create disturbances and
hospitals, railway stations, airports to display
the entire schedule may be disturbed. To avoid all
notices. Raspberry Pi is cheap, flexible, fully
these, Wireless Communication system have been
customisable and programmable small computer
designed which completely eliminates the manual
embedded linux board. Message to be send is
work.
transmitted from the computer. Then this massage
communication, RF. The RF modules used here are
is send in zigbee transmitter, from where it gets
2.4 GHz UART. The RF transmitter will be present
transmitted serially towards zigbee receiver.
at the Principal or the person related to the issues to
Transmitted massage gets collected by zigbee
be displayed news either on staff or college. PC
receiver and then it sends it to raspberry pi. Notice
keyboard is used as the input device here in this
board (lcd screen, monitor) will then display the
project. Whenever the user wants to send the news
massage which is interfaced to the raspberry pi.
updated to the notice board, he types that particular
We are using processing tool software in
message using keyboard and the same data will be
raspberry pi for the processing of incoming
transmitted
massage.
receiving end, the RF receiver and will be fixed to
This
project
through
RF
uses
the
transmitter.
wireless
At
the
the display panel. The receiver receives the data coming from the transmitter and the same data will Keywords— Raspberry Pi; Zigbee; lcd screen; Processing tool.
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be received by the microcontroller at the receiver end. The microcontroller sends this data to the
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International Engineering Journal For Research & Development
Vol.4 Issue 1
display unit and thus the message given by the user
XBEE can understand. Serial driver supports serial
at the transmitter end will be displayed.
communication. Raspberry Pi is the brain of the system it read, store and display message on LCD. We are using LCD monitor to display message
OBJECTIVE
which is stored.
To design the electronic notice board using wireless technology. So that wireless broadcasting
Raspberry Pi
can be possible in the replacement of traditional notice boards. Wireless communication between
The raspberry pi is a low cost, low power credit
HOD and faculty.
size single board computer which has recently
between
HOD
Wireless communication and
students.
Wireless
communication between faculty and students.
become very popular [4] [5]. The raspberry pi is the cheapest ARM11 powered Linux operating system capable single board computer board. This
PROPOSED WORK
board runs an ARM11 microcontroller @700MHz and comes with a 512 Mega Bytes of RAM
Software used in pc will communicate serially with ZigBee. Serial driver module is used to support serial communication between Xbee and PC. It is used to convert logic level that can both understand. All the data is received from PC can be sending wirelessly through Xbee module. It can send all the character in ASCII format. We can transmit image and complete sentence directly.
memory [12] [13]. In this paper, raspberry pi B+ model [5] is used as shown in figure 2, as this model has better specifications as compared to other raspberry pi models. Itsupports a number of operating systems including a Debian-based Linux distro, Raspbian which is recommended by raspberry pi foundation, which is used in our design [4] [5]. Raspberry Pi can be connected to a local area network through Ethernet cable or USB Wi-Fi adapter, and then it can be accessed by more than one client from anywhere in the world through SSH remote login or by putty software by just putting raspberry pi ip address in it. The raspberry pi is booted by external SD or micro SD card.
Fig. 1. The Overall System Architecture ZigBee module at receiver receives data wireless and sends data to Raspberry Pi through serial driver which is display on LCD monitor. Serial Driver is used to convert logical level that controller and
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Fig. 2. Raspberry Pi 2
Vol.4 Issue 1
International Engineering Journal For Research & Development
mesh network topology which is a type of network
Zigbee Standard
topology in which a device (node) transmits its ZigBee is a specification for a suite of high-level
own data aswell as serves as a relay for other
communication protocols used to create wireless
nodes. In the event of a hardware failure, many
networks built from small, low-power digital
routes are available to continue the network
radios. ZigBee is based on an IEEE 802.15.4
communication
standard. It is a simple, efficient, reliable, and low
regularly distributed networks that generally allow
cost, low-power standard of wireless technology.
transmission only to a node’s nearest neighbors.
Though
limits
The XBee module supports both transparent (AT)
transmission distances to 10–100 meters line-of-
and application programming interface (API) serial
sight,
and
interfaces. With the AT mode, the XBee module
environmental characteristics, ZigBee devices can
behaves as a serial line replacement. With the API
transmit data over long distances by passing data
mode, all data entering and leaving the module is
through a mesh network of intermediate devices to
contained in frames that define operations or events
reach more distant ones. ZigBee is typically used in
within the module. The API mode is required when
low data rate applications that require long battery
the network needs to be formed into a multi-node
life and secure networking (ZigBee networks are
mesh or tree topology [15].
its
low
depending
power
on
consumption
power
output
process.
Mesh
networks
are
secured by 128 bit symmetric encryption keys.) ZigBee has a defined rate of 250 Kbit/s, best suited for intermittent data transmissions from a sensor or
APPLICATION
input device [8]. The technology defined by the ZigBee specification is intended to be simpler and
Some important applications for which wireless
less expensive than other wireless personal area
broadcast system have been developed are:
networks (WPANs), such as Bluetooth or Wi-Fi [14]. For example DigiXbee series modules S1 and S2 implement the IEEE 802.15.4 radio and ZigBee networking protocol [9]. Here we used XBee series
1.
Wireless emergency notification.
2.
Wireless emergency call stations.
3.
It can be used for office automation, To display notices.
module S2 from Digi international which fully implement Zigbee protocol. XBee series S2 module
4.
numbers in the examination hall for
also covers more area than XBee S1 module.
seating arrangement.
XBee functions can be divided by network topology
in
different
ways
including
the
5.
network of ZigBee, it will consist of at least two
6.
device)
to
be
able
Used in bus stations, railway stations, parks, etc. to display the messages
nodes including coordinator node and sensor node (Router/End
It can be used in college, institutions and organizations to display notice boards.
coordinator, router and end device. For wireless
types
It can be used for the display of seat
wirelessly
to
communicate and work in PAN (Personal Area network). Wireless sensor network topology is
CONCLUSION
divided into 3 topologies: star topology, cluster tree
When user enters the message on PC the data is
topology, and mesh Topology [14]. We workedon
send
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trough
ZigBee
transmitter
by
serial
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International Engineering Journal For Research & Development
Vol.4 Issue 1
communication at transmitter. Data is received at receiver through ZigBee receiver and display on LCD
either
on
Staff
or
college
class
as
preselection.
FUTURE SCOPE In future, the range of ZigBee is increases to 2 to 5KM so that this project is implemented at bus station, railway station and also in industries. Also we used at examination centres to give notification for the students.
REFERENCES [1] Dharmendra Kumar Sharma, “Small
and medium range wireless electronic notice board using Bluetooth and ZigBee”2015 Annual IEEE India Conference [2] Yash Teckchandani, “Large screen wireless notice display system” 2015 IEEE International Conference on Computational Intelligence and Computing Research.
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