SMS BASED REMOTE CONTROLLING OF HOME

APPLIANCESMay 2012

Presented by:Phuntsho Gayenden

ECE2009064

Phuntsho Gayenden ECE2009064

OUTLINE

• Overview• Aims and Objectives• Research Methodology• Literature Review• Implementation• Critical Analysis• Conclusion• Acknowledgement© Copy Right Reserved

Phuntsho Gayenden ECE2009064

OVERVIEW

Home Appliance

Control System

SMS

SMS based Remote

Controlling of Home

Appliances

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Phuntsho Gayenden ECE2009064

AIM AND OBJECTIVES

• Aim:– Investigating a method for remotely controlling of

home appliances to make life easier.• Objectives:– To know concepts of Home Appliance Control

System– To know concepts of Short Message Service– Investigating the combination of HACS and SMS– Investigation of security

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Phuntsho Gayenden ECE2009064

RESEARCH METHODOLOGY

• Investigation of related paper works• Study of components involved– Home Appliance Control System– SMS– GSM Modem

• Simulating the combination• Investigation of its feasibility

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Phuntsho Gayenden ECE2009064

LITERATURE REVIEW

1) Home Appliance Control System (HACS)

2) Short Message Service (SMS)

3) Global System for Mobile communication(GSM) Modem

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Phuntsho Gayenden ECE2009064

LITERATURE REVIEW

• Home Appliance Control System– One central computer– Physically connected appliances– Software based– Offers security

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Phuntsho Gayenden ECE2009064

LITERATURE REVIEW

• Short Message Service– Used to send text from one capable device to

another one.– Limited character length• 160 characters in Latin alphabet• 70 characters for other alphabets such as Chinese

– Very convenient– Uses GSM

Step 1: The SMS message is submitted to the service provider's SMS center (SMSC).

Step 2: The SMSC sends a request to the Home Location Register (HLR) and receives the routing information for the recipient.

Step 3: The message is forwarded to Mobile Switching Center (MSC).

Step 4: MSC collects recipients’ information from Visitor Location Register (VLR).

Step 5: MSC forwards the message to a Mobile Server.

Step 6: MSC returns the outcome of the operation to SMSC.

Step 7: SMSC reports the delivery status to the sender.

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Phuntsho Gayenden ECE2009064

LITERATURE REVIEW

• GSM Modem:– Allows the computer to use GSM services.– Connected to RS232 port• Serial to USB converter

can be used.

– Controlled by AT commands• AT stands for Attention

AT Commands Meaning

AT+CSCA="num" Set message centre number to "num"

AT+CGMI Get the name of manufacturer

AT+GMI Get the ID of manufacturer

AT+GMM Get the Model Information

AT+CPAS Get mobile phone activity status

AT+CSQ Get radio signal strength

AT+CMGS Send SMS messagesAT+CMGR Read SMS messages

AT+CMGD Delete SMS messages

AT+CMGF Operate in text mode

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Phuntsho Gayenden ECE2009064

IMPLEMENTATION

• Working:– User defined SMS syntax

• Example: Kinley abc123 Heater on– SMS is received by HACS from the GSM Modem– SMS is decoded to understand the command

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Phuntsho Gayenden ECE2009064

IMPLEMENTATION

• Simulation:

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Phuntsho Gayenden ECE2009064

CRITICAL ANALYSIS

• Simple• Secured• Easy Controls• Location Independent– Works as long as there is a mobile network

• Vulnerable to power failure• Setting up is time consuming

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Phuntsho Gayenden ECE2009064

CONCLUSION

• The methods are not hard to achieve.• It is a step to make our home smarter.

Wouldn’t it be convenient to turn on the AC and water geyser on the way back home from work?

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Phuntsho Gayenden ECE2009064

ACKNOWLEDGEMENT

• I would like to extend my deepest thanks to– Mr. Tashi• For guiding me in the completion of this seminar.

– CST IT Department and Library• For providing the research materials

– Mr. Rajen Biswa– Mr. Gopal Chandra Nepal

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Phuntsho Gayenden ECE2009064

THANK YOU

Any Questions?

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