1. Student Name USN NO Guide Name H.O.D Name Name Of The College & Dept

2.  CONTENTS 1.Abstract 2.Objectives 3.Block diagram 4.Methodology 5.Advantages & disadvantages 6.Applications 7.Conclusion

3. 1. ABSTRACT It often happens that we forget to switch off some electric devices while leaving home for a journey. This will result in wastage of energy and even the device may get damaged due to overheating. Even if we remember that we have not switched off some devices, it may be difficult for us to come back and switch them off. Also, if we are away from home we may have to turn on the lights at night. These are normally not possible in present condition. Our project offers a novel solution for this problem by using a mobile phone, a common electronic gadget. This device is build around controller, a powerful system-on-chip. This uses DTMF (Dual Tone Multi Frequency) signals from mobile phone keypad to attain its functionality. For decoding the DTMF tones, we are using MT8870, CMOS Integrated DTMF Receiver.

4. 2. OBJECTIVES 1. To design low cost intelligent embedded system based remote monitoring system using mobile / cell phone. 2. To provide flexibility to use any cell phone model for remote monitoring. 3. To incorporate alternative mechanism for communication when messaging fails. 4. To implement a simple embedded system as a proof of concept

5. 3. BLOCK DIAGRAM

6. 4. METHODOLOGY: In this paper a remote control system is developed to perform controlling actions using a mobile phone. The proposed system can receive DTMF signals and sends them via decoder to a ARM controller then to a driving system that in turns will control the target device. The DTMF signal is generated when the keypad button is pushed by the user – mobile phone, then this signal is decoded to Binary Decimal Digits (BCD) by the DTMF decoder, after that the BCD is sent to ARM controller.

7. 5. ADVANTAGES & DISADVANTAGES:  ADVANTAGES: 1.Less human effort 2. User friendly. 3. Time Effective. 4. Security.  DISADVANTAGES: 1. One time investment is costly.

8. 6.APPLICATIONS: 1) Combination Lock 2) Home Security System 3) Mobile / Wireless Robot control 4) Wireless Radio Control 5) Continuous monitoring of system status 6) Remote Switches 7) Reporting during car accidents

9. 7. CONCLUSION: This paper presents a method to control a domestic system using the DTMF tone generated by transmitting telephone instrument when the user pushes the keypad buttons of the mobile phone connected to the remote domestic system. This control method uses commercial mobile communication networks as the path of data transmission. This enables the user to control the system continuously by sending the mobile phone DTMF tone. This system is implemented in the 2G mobile communication network, so video data cannot be obtained. Future work includes research on the robot control system in the 3G mobile communication networks. This will facilitate controlling the remote robot, using the DTMF of mobile phone with video data from the remote mobile robot’s camera.

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