BASED ON RASPBERRY PI AND ARDUINO UNO R3

INTRODUCTION

  • Home Automation System using Internet of Things a means to control the appliances at home via a device with access to the Internet.

 

  • The key components of this system are a system on chip- Raspberry Pi and a microcontroller-Arduino Uno.

COMPONENTS USED AND THEIR WORKING

Arduino UNO R3
Arduino UNO R3

The Arduino Uno R3 is a microcontroller board based on a removable, dual-inline-package (DIP) ATmega328 AVR microcontroller. It has 20 digital input/output pins (6 can be used as analog inputs). Programs can be loaded on to it from the easy-to-use Arduino computer program.

Raspberry Pi 2B+
Raspberry Pi 2B+

The Raspberry Pi acts as the brain of this system, processing the requests, responding to the requests made by the Android application, communicating with the Arduino and also acts as a server to store the data given by the sensors

BLOCK DIAGRAM

Block Diagram
Block Diagram

SENSORS

LIGHT DEPENDENT RESISTOR

LDR
Light Dependent Resistor

Photo resistors, also known as light dependent resistors (LDR), are light sensitive devices most often used to indicate the presence or absence of light, or to measure the light intensity. In the dark, their resistance is very high, sometimes up to 1MΩ, but when the LDR sensor is exposed to light, the resistance drops dramatically, even down to a few ohms, depending on the light intensity

PASSIVE INFRARED MOTION SENSOR (PIR)

PIR Sensor
PIR Sensor

The PIR sensor is used to detect any changes in the infrared signal it monitors, gives out a HIGH output signal when motion is detected. Options like delay timer and sensitivity can be adjusted using the controls on the sensor. It has a range of 20 feet or 6 meters and a field view of 110°±15. almost always used to detect whether a human has moved in or out of the sensors range

MAGNETIC REED SENSOR

Magnetic sensor
Magnetic Reed Sensor

Nagnetic sensor

The magnetic reed and motion sensors also act as security by checking the integrity of the doors and windows and detecting any unwanted motion in the house

GAS SENSOR (MQ5)

Gas sensor
Gas Sensor

The MQ5 is an LPG and Propane gas detection sensor which gives a HIGH signal on detection of gases in the environment.

SYSTEM ARCHITECTURE :

System Architecture
System Architecture

APPLICATIONS :

  • This system is used in home appliances and offices.

ADVANTAGES :

  • low cost system which can provide the user: power to do anything by doing almost nothing.
  • The use of Android as the base platform makes sure this system can be available to wide range of users.
  • Helps to improve the living standards and also provide a safe environment

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