WiFi Home security system

Published on 19 Apr 2022. Written by Vardaan Raj Singh

Episodes like robberies, house invasions are normal nowadays. What is unprecedented, however, is an individuals' awareness about various frameworks like a security system, camera and buzzer frameworks and so forth. Installing all these various detectors so as to keep the house secure is additionally something that is hard to keep up. Here, we have planned a coordinated home security framework that would assist individuals with verifying their homes from such occurrences.

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SLNOTE


IoT and Arduino based Home Security System venture is intended to support an individual secure his/her home from burglary. This task utilizes some unique sensors, from which information is sent over a website through IoT.

Technology / Tools Required

The components that are used in the IoT and Arduino based Home Security System are:

• ARDUINO UNO/ARDUINO MINI/ARDUINO NANO or similar board (Tx)
• ARDUINO UNO /ARDUINO MINI/ARDUINO NANO or similar board (Rx)
• PIR sensor
• 9V battery and connectors
• Buzzer
• LED
• IR sensor
• Microcontroller – Arduino
• LCD Display
• ESP8266
• Buzzer
• Keypad
• DC Motor
• RF Transmitter and Receiver Module (433 MHZ)
• Resistor -220 ohm
• Bread Board
• Jumper Wires
• perforated Board
• Header connectors
• Switches
• Project Enclosure
• Black Paper
• Scotch Mounting Pad

SLLATEST
Project Implementation

Fundamentally the task will have the accompanying structure:

Four transmitter units with PIR sensors, encoders, and RF transmitters; and collector units with RF recipient, decoder, MCU and some various media circuits.

Transmitter unit

There are four transmitter squares, one each for the front, back, left and right sides. Each square comprises a PIR sensor, RF encoder chip, and an RF transmitter (Tx) module.

PIR sensor 

The PIR sensor recognizes motion by estimating any adjustment in IR levels transmitted by objects. Pyroelectric gadgets have components made of a crystalline material, which create an electric flow when presented to IR radiation. Changes in the measure of IR falling on such gadgets change the voltages that are produced. Sensor yield goes high when it recognizes motion. Sensor yield is given to the RF encoder chip.

RF Encoder

HT12E encoder chip encodes the PIR sensor yield into sequential bitstreams and offers it to the RF Tx module.

RF transmitter

ASK transmitter tweaks approaching computerized signals from the RF encoder utilizing a 434MHz transporter and transmits it through its receiving wire.

Collector unit 

This is the focal controlling area that gets signals from any of the four PIR sensors at the transmitter side. It gives sound and visual alerts and shows the side where the motion is identified on LCD1.

RF collector 

This module works on 434MHz recurrence and demodulates the got computerized signals before sending bitstreams to RF decoder chip.

RF decoder

HT12D RF decoder chip disentangles bitstreams and creates equal 4-bit advanced yield, which is given to the MCU.

AT89S52 MCU plays out the accompanying undertakings:

1. Identifies side where motion is distinguished from RF decoder advanced yield
2. Showcases different messages remembering side of identified motion for LCD1
3. Turns on speaker and flickers LED for various media caution when motion is recognized

Multivibrators

There are two multivibrators. One for squinting the LED at low recurrence (1Hz - 2Hz), and the other for creating the sound recurrence signal (1kHz) through the speaker for alarm.

IoT and Arduino Based Home Security System utilizes Temperature and IR sensors. Data is then sent to the Arduino, which has a signal converter. Arduino then sends this data to ESP8266 which is a chip utilized for associating micro-controllers to the Wi-Fi system and make TCP/IP associations and send data. Data, identified by the sensors, is then sent to the IoT.

To get the robbery location, we have associated a password module by which a client can enter the password. The entryway would open just if the password entered is right.

In the event that an individual enters the right password, the IR sensor is de-actuated for 10 seconds and the buzzer won't turn ON. In the event that someone attempts to go into the house without entering the password, when the individual will pass the IR sensor, the buzzer would be turned ON. The buzzer would be turned ON regardless of whether an off-base password is entered sequentially multiple times.

Data is thus sent to the website utilizing the IOT module. The Pre-imperative for this task is that the Wi-Fi module ought to be associated with a Wi-Fi zone or a hotspot.

SLDYK
Kit required to develop WiFi Home security system:

• Arduino
• PIR
• LED
• LCD

Technologies you will learn by working on WiFi Home security system:

• Arduino
• IoT
• Wireless

Any Questions?