WIRELESS BROADCAST SYSTEM FOR INSTITUTIONS

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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