Page 70 - IJEEE-2022-Vol18-ISSUE-1

66 | Jumaa, Abd.ulkhaleq, Nadhim, & Abbas

Fig. 3: IoT-based gas leakage detector. V. METHODOLOGY

IV. PROPOSED SYSTEM COMPONENTS When a gas leak occurs, which is detected by a gas
sensor MQ-2, it will send data to the controller (ESP8266)
In this research, the hardware components (Gas Sensor via the controller analog port (A0) as illustrated in Fig. (4).
MQ-2, Wi-Fi Node MCU ESP8266, Fan, Power Supply 9V, Then the controller (ESP8266) will send a warning text
Buzzer, Relay, Buttery 3.3v to 5v, red LED and green LED, message alerting the occurrence of a gas leak via (Wi-Fi)
Transistor B514, Breadboard, 200 ohms resistors) were used technology in conjunction with Blynk Application which
along with Blynk Application. works on Android and IOS operating systems, the proposed
system used IOS Blynk App. At the same time, the buzzer
The following subsections describe the details of the will be on for an alarming, by connecting it to the
proposed system. Table (1) below review the components, microcontroller digital port (D5), and the fan will be
their quantity, and price in IQD. working to change the air of the place and get rid of leaking
gas. A transistor works in the form of a switch that turning
TABLE 1 on and off low loads, when the circuit is closed -while the
red LED is on- the relay is turning on and off the high loads,
List of required hardware opponents, quantity and price in where the high load performs the fan. The flowchart of the
proposed system is shown in Fig. (5).
IQD.
VI. WORKING PRINCIPLES
Component Quantity Price
Following subsections describe the working principles of
ESP8266 nodemcu 1 13000 the proposed system’s parts.

MQ2 gas sensor 1 5000 a) Blynk Platform
The Internet of Things (IoT) connects devices and
T09D060-2D1 power supply 1 8000
tools to the internet network to be controlled remotely
92*92*25mm fan 1 3000 through websites and smartphone applications, as well
as to control tools and instruments by means of codes
Buzzer 1 1000 and algorithms structures for artificial intelligence
issues. IoT is used for smart home controlling to operate
Normally-open relay 1 2000 lamps or other home-use devices, it can also be used as
a security system or as an industrial-use system. For
9 volts battery 1 3000 example, to open or close the main building gate, to
operate a fully automatic industrial machine, or even to
Bread board 1 3000 control internet and communication ports. More ideas
can be done using IoT technology. Huge industrial
LEDs 2 1000 facilities or governmental institutions have many lamps.
Employees sometimes forget to turn them off at the end
Transistor 1 2000 of the day. Energy could be saved by letting the security
control lighting of the building with IoT clouds or
Resistor 1 250 applications.

Wires 16 3000

Fig. 4: Circuit Diagram of the Proposed System.