DTMF Controlled Security systems

Published on 20 May 2022. Written by Tej Kumar

Today, the most aspiring and interesting research is happening in the field of advancements in Security systems. Right now we have the door lock based on the keyboard (by pressing the password door will be opened), Door lock based on SMS (by sending an SMS, the door will be opened), door lock based on fingerprint (when you scan a proper fingerprint, then only the door will be unlocked) etc.

But if we use the door lock based on the keyboard, there is a chance of finding the password with the impressions on the buttons created when we had pressed the keys of the keyboard. Through this project, you are going to create a unique project where the door lock will be opened only when you type the password in your mobile using DTMF module.

You will need an Arduino to interface the microcontroller with the Servo motors, DTMF module, and Wi-Fi module. You will programme the microcontroller in such a way that as soon as you press the password in the mobile app (DTMF tone generator) , immediately the servo motors will start rotating which in turn the door lock will be opened. You can also innovate the system where the door lock present status can be updated to the remote server for further analysis using a Wi-Fi module.

Project Description:

Arduino/Genuino Uno: The digital and analog input/output pins equipped in this board can be interfaced to various expansion boards and other circuits. Serial communication interface is a feature in this board, including USB which will be used to load the programs from computer.
Motor Driver: Generally the Arduino board is not capable of providing required amount of current for running the motors. So we use a device called Motor Driver which will provide sufficient current for driving the motors.
Servo Motors: A servomotor is a closed-loop servomechanism that uses position feedback to control its motion and final position. The input to its control is a signal (either analogue or digital) representing the position.
DTMF Module: The DTMF module decodes the audio signal generated using DTMF technology into digital values which can be understandable by compiler
Wi-Fi Module : ESP8266 Wi-Fi module is generally used to establish the wireless communication between the devices. But this module is not capable of 5-3V logic shifting and will require an external logic level converter.

Project Implementation:

Interface the DTMF module, motor driver and Wi-Fi module to the Arduino
Power the components and upload the code
Now connect your Smart phone with DTMF decoder using android app called DTMF Tone Generator which is available in play store
Now press the password which was mentioned while programming
Immediately you can see the door lock opening
The data about present status of the door will be sent to the cloud for storage and analysis

Software requirements:

Arduino IDE : You will be needing Arduino IDE software to write and upload the programming logic onto the Arduino Uno board
Thingspeak : Also, you need to create an account in the ThinkSpeak IoT platform to integrate the system onto the cloud and store the data online

Programming language: Arduino Programming (C++)

Kit required to develop DTMF Controlled Security systems:

Technologies you will learn by working on DTMF Controlled Security systems:

DTMF Controlled Security systems

Project Description:

Project Implementation:

Software requirements:

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