The document describes the development of a low-cost smart gas detector designed to detect and alert users about hazardous gases found in manholes and sewage systems, utilizing an IoT-based sensor. Key components include an Arduino Uno, ESP8266 WiFi module, jumper wires, a buzzer, and an MQ5 gas sensor, with a four-step process outlined for hardware connection, cloud configuration, coding, and notification setup. This project aims to enhance safety by providing timely alerts about gas leaks.

1. ATOA Scientific Technologies | Multiphysics CAE | Engineering Apps | 3D printing
Smart Gas Detector
Low-cost smart sensor for detecting and warning
about dangerous manhole/sewage
Gases.
Gowtham Kumar V
Business Development Intern
05 July 2018
To: Any MSME or Individual
From: ATOAST JYOTHI FOUNDATION
ATOA Public

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What is Smart Gas Detector?
A gas detector is a device that detects the presence of gases in an area, often as part
of a safety system. It can sound an alarm to operators in the area where the leak is
occurring, giving them the opportunity to leave. This type of device is important
because there are many gases that can be harmful to organic life, such as humans or
animals. Low-cost smart sensor for detecting and warning about dangerous
manhole/sewage gases.
• IOT based gas sensor
• Gas Leakage Detection & Alert Using Arduino UNO
• Accurate detection of an emergency

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Hardware Required:
1. Arduino Uno
2. ESP8266 Wifi Module
3. Jumper Wires (30 pieces)
4. Buzzer
5. Gas sensor MQ5

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Arduino Uno
Arduino is an open source computer hardware
and software company, project, and user
community that designs and manufactures
single-board microcontrollers and
microcontroller kits for building digital devices
and interactive objects that can sense and
control objects in the physical and digital world.
Source: https://en.wikipedia.org/wiki/Arduino

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ESP8266 Wifi Module
• The ESP8266 is a low-cost Wifi microchip
with full TCP/IP stack and microcontroller
capability.
• This is used to connect our product
through wifi.
Source: https://en.wikipedia.org/wiki/ESP8266

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Jumper Wires (30 pieces)
• Jumper wire male to male, used in
connecting female header pin of any
development board (like arduino) to
other development board or breadboard
• Jumper Wire - 10 Male to Male + 10
Female to Female + 10 Male to Female
Source: https://www.amazon.in/

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Buzzer
A buzzer or beeper is an audio signalling
device,[1] which may be mechanical,
electromechanical, or piezoelectric (piezo for
short). Typical uses of buzzers and beepers
include alarm devices, timers, and confirmation
of user input such as a mouse click or
keystroke.
Source: https://potentiallabs.com/cart/buzzer

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Gas sensor MQ5
Gas Sensor(MQ5) module is useful for gas
leakage detection (in home and industry). It
is suitable for detecting H2, LPG, CH4, CO,
Alcohol. Due to its high sensitivity and fast
response time, measurements can be taken
as soon as possible. The sensitivity of the
sensor can be adjusted by using the
potentiometer.
Source: http://wiki.seeedstudio.com/Grove-Gas_Sensor-MQ5/

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Steps involved in Project:
STEP 1: Hardware Connection
STEP 2: Configuring ThingSpeak Cloud for uploading Sensor Values
STEP 3: Code & Upload
STEP 4: Posting to Pushbullet via ThingSpeak for getting Push Notification on
Android

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Step 1: Hardware Connection
Circuit Diagram:
ESP8266
RX
GND
VCC
CH_PD
TX
5V
3.3V
.
GND
AO
A1
.
.
.
.
.
A5
D0
D1
D2
D3
.
.
.
.
.
.
.
.
D13
GND
GND
ARDUINOUNO
+5V
Vcc
DO
AO
MQ5
Buzzer

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Step 2: Configuring Thingspeak Cloud
• Firstly, visit www.thingspeak.com and click on the "Get Started" button to make a
free account.
• Next click on the "New Channel" Give it a name and select two fields.
• Now click on the "Make Public?" check box option.
• Finally click on the "Save Channel" button.
• Click on your new channel and select the API keys tab (third image above). Copy
your "Write API Key" , you will need it in the next step.

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STEP 3: Code & Upload
SMART GAS DETECTOR - ARDUINO PROGRAMMING - Link
• Just edit these lines with your information in the code & upload it to Arduino :
• String apiKey = "5G0NEIEWV7FQWERTY"; -ThingSpeak key
• String ssid="ATOAST"; - Wifi Hotspot Name
• String password ="123456789"; - Wifi Password
• Monitor Thingspeak Channel Output.
• This code is written in a way that if there is gas leakage then a sensor value will
be pushed to ThingSpeak Channel.

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STEP 4: Posting to Pushbullet via ThingSpeak
• First step is to go to PushBullet and make a new free account. Activate your
account.
• Download PushBullet in your mobile.
• Create Access Token in settings.
• Setup the ThingSpeak Http, React App.
• Click New ThingHTTP button, NewReact and Fill Out the Form.