Synopsis on Gsm Based Street Light Automatio1

8/10/2019 Synopsis on Gsm Based Street Light Automatio1

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GSM BASED STREET LIGHT AUTOMATION

INTRODUCTION

The advances in the technologies related to wireless communication has led to the emergence

of several engineering designs to aid the human requirements. As we all know Agriculture play a significant role in developing country like India and implementing mobile

communication for facilitating farmers is the basic idea of our project. Thus with the creeping

interests in the wireless and GSM based projects, we came up with this idea of developing a

simpler, multipurpose, cost-effective design to control the on-off street lights via short

message service (sms).

Motor Starter for irrigation in Agricultural Applications encompasses lighting, security,

telecommunications, access and safety, information and entertainment systems and thermal

comfort systems. Besides self monitoring and regulation the Motor Starter for irrigation in

Agricultural Applications system will also give auxiliary control to the user to enable him/her

to control any application from a remote place. Such a facility would require a tool thatextends access to Motor Starter for irrigation in Agricultural Applications base station

controller from his/her premises to anywhere the user might be. This is done through a

mobile device making this system truly global.

Commands are sent to street light for night lighting Applications system through user’ mobileas data through SMS (Short Service Messages) providing a cost effective, reliable far

reaching access to the user. The coded SMS is sent to the light relay system to base station

controller that receives the messages, decodes the messages, initiates required automation

operations and responds to the successful initiations by a reply to the user.

WORKING PRINCIPLE

The device consists of GSM modem, microcontroller, relays, memory and display. If the user

wants to control light he has to send the SMS indicating the operation of the device and then

the system password, while the MODEM embedded with the system microcontroller receives

SMS. The microcontroller will read SMS and check for the password the user had sent with

the SMS.

If the password is correct then it will check whether the message is for switch ON or OFF the

light, According to the received message the controller will switch on / off the relays. The

device is password controlled, therefore only the people who know the device password iscapable to control the device.

Relay and buzzer is controlled by the microcontroller using single pins, i.e. giving high

means device will switch on and vice versa. Sometimes it may be interchange according to

the transistor used to drive the device.

GSM based street light monitoring & control system is an automated system designed to

increase the efficiency and accuracy of an industry by automatically timed controlled

switching of street lights. GSM based street light monitoring & control system consists of an

89C51 microcontroller [1] which on setting of time delays switches ON/OFF the street lights

and sends the update through a phone to the specified phone number.





BLOCK DIAGRAM



CIRCUIT DIAGRAM

AT-Command set

The following section describes the AT-Command set. The commands can be tried out by connecting

a GSM modem to one of the PC’s COM ports. Type in the test-command, adding CR + LF (Carriage

return + Line feed = \r\n) before executing. Table gives an overview of the implemented AT-

Commands in this application. The use of the commands is described in the later sections.

Command Description

ATCheck if serial interface and GSM modem isworking.

ATE0 Turn echo off, less traffic on serial line.

AT+CNMI Display of new incoming SMS.

AT+CPMS Selection of SMS memory.

AT+CMGF SMS string format, how they are compressed.

AT+CMGR Read new message from a given memory



location.

AT+CMGS Send message to a given recipient.

AT+CMGD Delete message.

A BRIEF INTRODUCTION TO 8051 MICROCONTROLLER:

When we have to learn about a new computer we have to familiarize about the machine

capability we are using, and we can do it by studying the internal hardware design (devices

architecture), and also to know about the size, number and the size of the registers.

A microcontroller is a single chip that contains the processor (the CPU), non-volatile memory

for the program (ROM or flash), volatile memory for input and output (RAM), a clock and an I/O

control unit. Also called a "computer on a chip," billions of microcontroller units (MCUs) are

embedded each year in a myriad of products from toys to appliances to automobiles. For example, a

single vehicle can use 70 or more microcontrollers. The following picture describes a general block

diagram of microcontroller.

89s52: The AT89S52 is a low-power, high-performance CMOS 8-bit microcontroller with 8K bytes

of in-system programmable Flash memory. The device is manufactured using Atmel’s high -density

nonvolatile memory technology and is compatible with the industry-standard 80C51 instruction set

and pinout. The on-chip Flash allows the program memory to be reprogrammed in-system or by aconventional nonvolatile memory pro-grammer. By combining a versatile 8-bit CPU with in-system

programmable Flash on a monolithic chip, the Atmel AT89S52 is a powerful microcontroller, which

provides a highly flexible and cost-effective solution to many, embedded control applications. The

AT89S52 provides the following standard features: 8K bytes of Flash, 256 bytes of RAM, 32 I/O lines,

Watchdog timer, two data pointers, three 16-bit timer/counters, a six-vector two-level interrupt

architecture, a full duplex serial port, on-chip oscillator, and clock circuitry. In addition, the AT89S52

is designed with static logic for operation down to zero frequency and supports two software

selectable power saving modes. The Idle Mode stops the CPU while allowing the RAM,

timer/counters, serial port, and interrupt system to continue functioning. The Power-down mode

saves the RAM con-tents but freezes the oscillator, disabling all other chip functions until the next

interrupt

The following are some of the capabilities of 8051 microcontroller.

Internal ROM and RAM

I/O ports with programmable pins

Timers and counters

Serial data communication



The 8051 architecture consists of these specific features:

16 bit PC &data pointer (DPTR)

8 bit program status word (PSW)

8 bit stack pointer (SP)

Internal ROM 4k

Internal RAM of 128 bytes.

4 register banks, each containing 8 registers

80 bits of general purpose data memory

32 input/output pins arranged as four 8 bit ports: P0-P3

Two 16 bit timer/counters: T0-T1

Two external and three internal interrupt sources Oscillator and clock

circuits.

1. Transmitter: We are going to implement the Person counter module using 2 transmitters and 2

receivers. We are going to use InfraRed transmitters because infrared beams are not visible to

human eyes. Transmitter used is IR LEDs

2. Receiver: We are going to use an Infrared receiver. It is an active low device which means it gives

low output when it receives the Infrared rays.

3. Microcontroller: This is the CPU (central processing unit) of our project. We are going to use a

microcontroller of 8051 family. The various functions of microcontroller are like I. Reading the digital

input from two infrared receivers and calculate the number of persons from them. II. Sending this

data to LCD so that the person operating this project should read the number of persons inside the

room. III. Sensing the password using keypad and to check whether it is a correct password or awrong password and rotate the stepper motor if the password entered is a correct password. IV.

Sending the data to the GSM modem using serial port. This data consist of number of persons inside

the room and the status of entered password (Correct/wrong)

4. LCD: We are going to use 16x2 alphanumeric Liquid Crystal Display (LCD) which means it can

display alphabets along with numbers on 2 lines each containing 16 characters.

5. GSM Modem: We are going to use sim300 as a GSM modem. The values of number of persons

inside the room, LPG Gas leakage status and the status of entered password (Correct/wrong) will be

sent to GSM modem.

Application and Advantage: 1. Can be used in various rooms like seminar hall, conference room, and study rooms in college

where the capacity of room is limited and should not be exceeded. So the project will display the

actual number of persons inside the room.

2. The other part of the project (password detector) can be used to automate the door locking

process, so the user need not to carry the door lock keys along with him, he can just remember the

password and use it later to open the door.

3. Cost effective.

4. Fast and efficient

Future Development:

1. We can monitor and control more parameters and devices.2. Voice announcement system can be added to indicate device conditions.



3. We can implement other related modules like fire sensor, wind sensor.

4. We can add the module of voice alarm system to indicate that the room is full and persons cannot

enter inside.

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Synopsis on Gsm Based Street Light Automatio1