Submitted By:Anand Bapuraya Biradar

Mahesh Laxman Kulali

Sachin H Talakeri

Manjunath K S

SMS BASED CONTROL OF PUMP SET USING GSM

MODEM

Submitted To:Mr.Sankraiah.Associate professor EC departmentSJCE Mysore

CONTENTS• Objective• Introduction• Block Diagram• Working Principle• Advantages• Applications• Limitations• Future Scope of Work• Conclusion

OBJECTIVE

The objective of this project is to design and develop a wireless communication link to monitor and control the operation of the pump set by sending sms from remote area.

INTRODUCTION• The proposed system is based on

microcontroller application.• The transmitter is a mobile phone

which uses certain codes corresponding to which relay acts.

• At the receiver, the GSM modem receives the message from the mobile phone and gives it to the microcontroller which acts to control the operation of the pump set.

BLOCK DIAGRAM

GSM TRANSMITTER GSM RECEIVER

MICROCONTROLLER

(AT mega16L)

gsm modem max 232

PUMP SET(DC) relay 1

LCD Display

memory at24c04

Power supply(lm 7805)

WORKING PRINCIPLE• At the transmitter side, the user

sends an SMS to the GSM modem using AT commands indicating which operation to be done.

• At the receiver side, Microcontroller controls the devices through relay depending on the code received by the GSM modem.

POWER SUPPLY The microcontroller and other

devices get power supply from AC to Dc adapter through 7805, 5 volts regulator. The adapter output voltage will be 12V DC non regulated.

AC

SUPPLY

Step Down T/F

Bridge Rectifier

Filter Circuit

Regulator

GSM MODEM• GSM Modem is a multi-

functional, ready to use, rugged unit that can be embedded or plugged into any application.

• The Modem can be controlled and customized to various levels by using the standard AT commands.

GSM MODEM(CONT…)The modem comprises several

interfaces:-• LED Function including operating

Status• External antenna • Serial and control link • Power Supply • SIM card holder

COMMANDS FOR SMS OPERATIONS

Pump set ON • (PASSWORD) STARTPump set OFF• (PASSWORD) STOPPump set turns ON at particular time xy• (PASSWORD) STARTATxyPump set turns OFF at particular time xy• (PASSWORD) STOPATxy

MICROCONTROLLER-ATmega16L

• High performance, Low-power(4.5 to 5.5 V) 8 bit microcontroller .

• Advanced RISC architecture with 131 powerful instructions.

• 16K Bytes of In-System Self-programmable, Flash memory, 512 Bytes EEPROM and 1K Byte Internal SRAM.

• 32 Progammable I/O Lines and Byte-oriented Two-wire Serial interface with Programmable Serial USART.

MAX232• MAX232 was created for one

purpose, to interface between Data Terminal Equipment (DTE) and Data Communications Equipment (DCE) employing serial binary data interchange.

• So as stated the DTE is the terminal or computer and the DCE is the modem or other communications device.

EEPROM

• electrically erasable and programmable read only memory (EEPROM) is organized as words of 8 bits each.

Features:• 2-Wire Serial Interface • High Reliability Vital role of External EEPROM

memory : To store the status of the relay

switches.

RELAY• Relays use an electromagnetic coil to move

the poles of a switch when powered. There are three pairs of connections known as common, normally open and normally closed.

• The center terminal block is the common (CO) connection and is connected to either the upper or lower terminal block depending on the state of the relay.

• Vital role of RELAY: Switch on/off the device according to the

microcontroller commands.

ADVANTAGES• Reduces human effort.• Reduces transportation charge.• Effective use of water.• Effective use of power.• Time saving.

APPLICATIONS

• Home Automation• Office Automation• Industrial Automation• To control water pump sets in

agricultural fields.• The security system can be

employed in household or any organization.

LIMITATIONS• If the main module or the

handset is not in the cellular range ,we can’t control the devices.

FUTURE SCOPE OF WORK

• Connecting More Devices.• Provision To Store Several Mobile

Numbers

CONCLUSION• We presented an approach that

can be employed to improve the performance of various devices that are not in the close vicinity of the user.

• The usability of the design was verified by controlling a Pumpset.

• The user was informed about the action through a reply SMS sent by the modem at the receiver.