Features of our smart devices

Smart-bulbs

Smart Switches

System

Introduction

Smart-Home is meant for convinence and efficecy. Controlling and monitoring your home by your smart-phone make things easier. Smart-bulbs,smart-switches and smart-bliends make your home more smarter.

Problem

In the Non-smart-Homes or the traditional homes, so much energy waste is due to improper management. Monitoring the full home appliances is insane. When the peak of the electric bill, we don't know what eats the power so much. It is so inconvenient some time for example, when you forgot to turn off the light before sleeping or going far away and forgot to turn off your bulbs or switches..

Solution

Solution is simple. Using concepts like IOT, HCI and AI(future plan) we can implement smart devices for the homes. They can be control using our mobiles and they can semi-automated. And also you can monitor your home power consumption details by using and smart-switch embeded with voltage and current sensor. For this project we going build smart bulbs and the switches.

Solution Architecture

Our solution Architecture contains two types of devices, they are Smart-Bulbs & the Smart-Switchs. They both devices, sensors like motion sensor, AC current sensor, AC voltage sensor and the Rellay are directly connected with the Central Unit. Our mobile application and the central unit connectedto the cloud via internet. So they can communicate with them-self. The central unit will use the MQTT protocol to communicate with the server.

The energy consumption monitoring, this is a feature embeded with all the switches to calculate the energy consumption and update it to the cloud. This is can be implemented using Two sensor AC Current sensor and AC voltage sensor.

Motion Sensing, Motion sensing is another feature built-in with the bulbs, The motion sensors are connected to the central unit. When a motion detected or the central unit wil turn on the bulb and if no motion/human detected the CU will turn off the bulb.

Mobile applications communicate with the central unit through the cloud or diretly using wifi router. The User settings, user data, and the reports will be stored in the cloud/server.

UI DESIGN

ER Diagram

Hardware Model

This our Hardware model of our project. These are the hardware componets we planned to use:

NodeMCU32S

NodeMCU32S is development board which is embeded with the esp32 micro controller which so small but powerfull. It's the perfect controller for our project because it's cheap, it already comes with the wifi module and it has many features.

Feature of the ESP32:

18 Analog to DC converter
3 SPI interfaces
3 UART interfaces
2 I2C interfaces
16 PWM output channels
2 DAC
2 I2S interfaces
10 Capacitive sensing GPIOs

Referense Link
Hardware Model

PIR Sensor

Passive Infrared Sensor commanly known as Proximity motion sensor. PIR sensors are used to detect the movements. It functioning by absorbing the IR rays emits from the objects. Humans and animals emit the IR radiation other than that the hot objects also emits the IR rays so IR sensor detect the movements of the objects. Many variety of sensors in the market they vary with price, sensitivity and range. For this project we HC-SR501. Because it mid range wide, angle, good sensitivity and cheap

Referense Link
Hardware Model

Current Sensor

ACS 712 Current sensor used to measure the current using the Hall-Effect princile. Many current sensors are in the market but we selected this because of it's size and accuraccy. it's so small but it can measure up to 30A and the energy wastage is negligible.

30 A module
5V Operating Voltage
Scale factor 100 mV per Amp

Referense Link

Hardware Model

Voltage Sensor

ZMPT101b is a voltage sensor which accurate and small in size and best suited for the IoT developments.

Measure up to 250 V
Operating Voltage: DC 5V-30V
Output Signal: Analog 0-5V

Referense Link

Hardware Model

3-3.3V Relay

Relay is an electrically operated switch. It consists of a set of input terminals for a signal or multiple control signals, and a set of operating contact terminals. The switch may have any number of contacts or multiple contact forms, such as make contacts, break contacts, or combinations thereof.
Relay are used where it is necessary to control a circuit by an independent low-power signal, or where several circuits must be controlled by one signal.

Referense Link
Hardware Model

AC Dimmer

The AC Dimmer is designed to control the alternating current voltage, which can transfer current up to 400V/8А. In most cases, Dimmer is used to turning the power ON/OFF for lamps or heating elements, it can also be used in fans, pumps, air cleaners, e.t.c. Lately, Dimmer has become an often-used decision for smart home systems. For example, when you need to smoothly change the light brightness.