How to interface MQ-2 Gas Sensor with Arduino Uno (with Code and Library)

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#Arduino #Smoke #Detector
What is a Gas Sensor?
They are electronic devices that detect and identify different types of gasses. They are commonly used to detect toxic or explosive gasses and measure gas concentration.
In this project, I have interfaced a Gas Sensor with Arduino that displays the contents of various gases in the atmosphere. The MQ-2 Gas Sensor can detect a list of Gases along with Smoke.
So incase you are looking out for a smoke detector, you can modify the same program for smoke detection.
Components List:
Arduino Uno : amzn.to/3eAvyJl
MQ-2 Gas Sensor : amzn.to/3nbnKl8
LCD 16x2 with I2C Module : amzn.to/3sByuKE
Jumper Cables : amzn.to/3v3juGM
MQ-2 Sensor Code and Libraries :
github.com/rol...
Library
www.electronic...
Code : www.electronic...
LCD tutorial : • LCD 16x2 interfaced wi...
Read the Post at : www.electronicssimplified.in
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#GasSensor #Arduino#SmokeDetector#Gases

Опубликовано:

7 сен 2024

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Комментарии : 178

@shramiksalgaonkar8635 3 года назад

One of the most detailed video on youtube. Great work sir...

@denzilpillay7986 3 года назад

I am using this video as part of my project and when you listed all the materials I bought them , you mentioned that we should but Male to Female but went on to use Male to Male.

@rolanpereira7643 3 года назад

Female to male is preferably. But a jumper cable set is what is mentioned in the video.

@ElectronicsSimplified7 3 года назад

Jumper cable set is listed in the components. Please use the links below. If you have existing jumper cables then male to female are preferred as they would replace the use of even a breadboard.

@bhaskarg8438 2 года назад

Better if you also explain the code logic with respective to the components assembled to Arduino, Thank you

@ElectronicsSimplified7 Год назад

I have started doing this in my newer videos. Considering your suggestion.

@satishmohitsatish1730 2 года назад

Sir how to connect alarm in this project if lpg or another harmful gas leakage happened

@trinican2 3 года назад

I enjoyed your tutorial but I have two questions. 1. Does the MQ2 library automatically includes the calibration in gas type and ppm ? 2. I would like to do the same with an MQ9 to measure natural gas in ppm. Is there an equivalent MQ9 library and would the command syntax be the same ? Thanks very much.

@ElectronicsSimplified7 3 года назад

1.The library of MQ2 includes the calibration for all the gases MQ2 sensor can detect. 2. github.com/mdsiraj1992/Gassensors visit this link and access all the libraries for MQ gas sensors. Thank you!

@AnshumanAtrey Год назад

will it work directly with a laptop and no battery? my LCD only shows blue light I am using 400 point breadboard The I2C module is already connected to LCD please help sir

@2JSinc Год назад

Thanks for this, would it be possible for you to add a LPG tank weight monitoring with low level alert, thanks

@ElectronicsSimplified7 Год назад

U need to use fuel level meter ...

@prashadnaik1208 3 года назад

Well explained Sir

@ElectronicsSimplified7 3 года назад

Well more will keep coming ... ❤️

@sagarnarote1045 Год назад

Sir I really need your help can I get your contact number

@ElectronicsSimplified7 Год назад

electronicsengineering3@gmail.com

@ayushtiwari46 2 года назад

Bro I want to add gsm module in it also how may I do that ????????........plz reply

@TheIQ127 11 месяцев назад

can you please give me the vision of liquidi2c library please

@ElectronicsSimplified7 11 месяцев назад

www.electronicssimplified.in/wp-content/uploads/2023/06/LiquidCrystal_I2C.zip

@joycechong8907 2 года назад

Well explanation!! Nice! I have a little question. Since most of the tutorials are used to test for smoke and gas, is that possible to test the human breathing? Thanks!

@ElectronicsSimplified7 2 года назад

No. This is not mean for human breathing.

@joycechong8907 2 года назад

@@ElectronicsSimplified7 Is there any sensor to test for?

@ElectronicsSimplified7 2 года назад

Wearable Humidity sensors.

@muhammadnawzad1680 7 месяцев назад

Hi i have some question 1- for the measurement how to calibrate it ? 2- what is the range that read for LPG in PPM ? Maximum & Minimum?

@shashanktg08 Год назад

i did the same way as shown it turned on as it was to be but there is no reading on the lcd what is the problem

@akshaypatil8467 Год назад

Can we used multiple gas detector sensor

@DavidDavis-se8ns Год назад

His "MQ-2" sensor looks like an MQ-135. I know because I bought the same. Only in the Fritzing schematic, an MQ-2 is depicted. MQ-2 is not even suited for carbon dioxide but MQ-135, which he handles at the beginning (I quit watching) does.

@ElectronicsSimplified7 Год назад

As an example, a methane (molecular) concentration of 2% means that 2 out of every 100 air molecules is methane. Similarly, a methane concentration of 2 ppm means that 2 out of every 1 million air molecules is methane. Can MQ-2 detect CO2? A short and simple answer to this question is yes, it can detect CO2. You can refer to how smoke is mostly a combination of carbon monoxide and carbon dioxide. Mq-2 sensor has the ability to detect. But the measurements are derived from other gas concentration values.

@DavidDavis-se8ns Год назад

@@ElectronicsSimplified7 You are quite right that there is a mathematical correlation between the two. It's just that we do not exhale methane. I believe cows do produce a lot of methane. So there could be one useful application for it 🙂. If you don't want to spend some 30 bucks on a real CO2 sensor you could get the SGP30 from Ali.... for a few dollars. It does a pretty good job in indirectly calculating the CO2 value in the air. Some smart folks on RU-vid already found out. I probably will get one too, later on. ...

@rampagegaming5645 Год назад

Is this working by using MQ135 sensor?

@carson5702 2 года назад

loved the vid but where can you find the MQ2 sensor library normally because I can't find it.

@ElectronicsSimplified7 2 года назад

www.amazon.com/Butane-Hydrogen-Sensor-Detector-Module/dp/B0786DH3BW/ref=mp_s_a_1_2?keywords=mq2%2Bsensor&qid=1638064300&sr=8-2&th=1&psc=1

@ElectronicsSimplified7 2 года назад

github.com/rolan37/MQ-2-Sensor-Interfaced-with-Arduino

@dr.mithilfaldesai3561 2 года назад

What is the output unit from A0? resistance in milliohms? current in mA?

@ElectronicsSimplified7 2 года назад

It's neither. It will always be voltage levels. That would be ranging from 0V to Vcc (in this case its 0V to 5V)

@erasaniswaroopkumar9124 10 месяцев назад

can u explain the mq7,and mq8 gas sensors interface with arduino uno output data displays in 20*4 display with code

@manojmodapalli1635 Год назад

sir i did the same connection shown in the viedo , lcd display was working but it didnt show the detection percentage as shown in the viedo how can i fix this problem , thank you

@ElectronicsSimplified7 Год назад

You can check for your wires and connections

@Cdswjp Год назад

Great work bro

@nsagrawal5444 Год назад

Can you siplyfy the wire connection

@sriyakanuri4453 8 месяцев назад

Hi, i've the lcd but do not have the i2c coverter, so how do i interface it?

@sriyakanuri4453 8 месяцев назад

Can I still use an lcd shield instead?

@kushals2538 7 месяцев назад

i have given the correct commands and connections but the lcd is not powering up

@johnpatrickabsalon2221 Год назад

what type of Arduino is this? can i use arduino uno r3 DIP?

@azuraaishah61 3 месяца назад

lcd.print((smoke*100)/1000000); what is the purpose of this formula?

@Drxxx 3 года назад

Great channel!!

@ElectronicsSimplified7 3 года назад

Thank you!

@sanjaykhatri6093 3 месяца назад

My code is loaded sucessfully but all the values are showing 0 then what to does we have to wait for 5 minutes for heating and even after bringing the smoke near the mq2 sensor there is no reading on LCD

@ElectronicsSimplified7 3 месяца назад

Sensor is not connected correctly

@kagisopilane1000 Год назад

Hi, this is great. My LCd displays lpg: 0 CO:0 Smoke: 0%. Is the problem with the calibration maybe

@deadlyvenom5804 10 месяцев назад

Dude smoke ppml is not calculating any solution??

@dilj1439 9 месяцев назад

Where is the code .?.???

@khessclarksereno6327 9 месяцев назад

Is it possible to measure the level of methane gas only in the mq2 library?

@user-be3jx1xd1w 3 года назад

Broh! At 3:25 uh said to connect A0 to Analog Pin 0 on Arduino, but uh connected GND to A0 .Can uh plzz tell me which is correct??

@rolanpereira7643 3 года назад

Connect A0 to Analog Pin 0 on Arduino, that's correct.

@rolanpereira7643 3 года назад

Don't go by the wire colors. They are a little similar. And i see why you are confused.

@ElectronicsSimplified7 3 года назад

Please see that A0 on the MQ will be connected to A0 pin on the Arduino. Don't refer the wire colors. See the circuit diagrams. Bingo.

@user-be3jx1xd1w 3 года назад

@@ElectronicsSimplified7 Ok broh.. Thanks for helping. Im confused by colours.

@user-be3jx1xd1w 3 года назад

@@rolanpereira7643 Thanks broh!

@RitheshMoolya 2 года назад

I need ammonia sensor with display...

@MuhammadSyamil-me8vw 6 месяцев назад

bro in the library there is only lpg,co,and smoke, how do i detect the ch4 then?

@razzheenshyrickadelacruz5233 2 года назад

I tried doing this project. However, the smoke cannot be detected. The value displayed for smoke is at 0% only. Only the values of LPG and CO are read. How can I fix this?

@thatwasparticia6671 Год назад

Help, what did you do

@ElectronicsSimplified7 Год назад

You probably have changed the code and failed to display it.

@bryanlanchimba4740 9 месяцев назад

@@thatwasparticia6671 I think it is because we transformed the smoke reading into a percentage. The value is very small and could not be read. I removed this 100/1000000 part and started reading the smoke.

@mariyamansari5526 Год назад

Sir i am getting the output on serial monitor but not on LCD

@ElectronicsSimplified7 Год назад

Can you check your connections?

@ElectronicsSimplified7 Год назад

Make sure your libraries for LCD are added correctly. Please add the libraries from the description.

@NBAK-jx5ud 3 года назад

where's the link for the LCD not display.

@ElectronicsSimplified7 3 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-UezoCbBSavQ.html

@NBAK-jx5ud 3 года назад

oh wow! very responsive thank you!. hoping you gain million of subscribers! ❤️

@user-rv8vg1dq7k Год назад

Why it is taking too long to upload the program into Arduino Uno?

@ElectronicsSimplified7 Год назад

Sometimes the compilation can take longer than expected. It's completely normal.

@imransaeed5536 2 года назад

I am looking to someone to make me whole unit with my logo on it, with packing and detail instructions, how to install it . I need big production of it. Thanks

@ElectronicsSimplified7 2 года назад

For which place

@boraicho6276 Год назад

Does this sensor (MQ-2) detect Carbon Dioxide concentration ? I only see Carbon Monoxide reading in the video.

@ElectronicsSimplified7 Год назад

Yes

@ShiwonPrecious 5 месяцев назад

Is it possible to detect the gas and actually direct it in a particular place

@ElectronicsSimplified7 5 месяцев назад

Could you please elaborate?

@AmanKumar-es4wp 2 года назад

If any one u have and you know how to program them plzz help

@ujjwalsinha7385 Год назад

the output is not displayed on the LCD what to do?

@user-tc9dv7hi2y 6 месяцев назад

bro can we use c2h4 gas sensor fof same steps behalf of using gas sensor

@ElectronicsSimplified7 6 месяцев назад

@Crazy_22119 Год назад

lcd.begin();//Defining 16 columns and 2 rows of lcd display . Bro in this line i am getting error. Pls help me .its an emergency pls . I have school project

@the_hyper_here3236 Год назад

sir can you send me working of block diagram

@ShiwonPrecious 5 месяцев назад

Sir please which code did you use for the gas detector

@ElectronicsSimplified7 4 месяца назад

Code : www.electronicssimplified.in/feed/code-for-gas-sensor/

@advance-maths Год назад

Yesir

@AmanKumar-es4wp 2 года назад

Sir I have urgent need of this program

@gourabhaldar6627 Год назад

If I use MQ135 instead of MQ2 will the code change?

@ElectronicsSimplified7 Год назад

Yes it will change

@gourabhaldar6627 Год назад

@@ElectronicsSimplified7 ok sir, thanks for the reply. Actually I'm doing this with MQ135 sensor. So can you please tell what changes I need to do in order to run this successfully. Thanks in advance.

@user-ot3er7ph7q Год назад

Sir i am getting the output displayed on serial monitor but not on lcd .There are no errors and connections are also proper

@ElectronicsSimplified7 Год назад

Why is the LCD working with other programs? Just check if the LCD can receive data and display some data on it. You might have to adjust your potentiometer at the back of your I2C module.

@shamilsalman9175 2 года назад

add buzzer and gsm module to it

@ElectronicsSimplified7 2 года назад

Possible. You can mail me at electronicsengineering3@gmail.com.

@NotGreig 9 месяцев назад

hello sir, i am receiving a compiling error with my lcd screen. It say's no matching function

@ElectronicsSimplified7 9 месяцев назад

Install the required libraries

@kaushikmistry3438 Год назад

Bro mq2 library is not installing

@ElectronicsSimplified7 Год назад

You have to remove it from your Arduino/library folder And then reinstall it.

@wanfiq3191 Год назад

can i get example the coding?

@ElectronicsSimplified7 Год назад

Its in the description

@manmangy Год назад

Can we use this to test Chlorine

@karthik3889 Год назад

Please give mq 4 library

@rsiinvestor450 3 года назад

*Recomemd by Emanul Perreira*

@loveislikedream 2 года назад

bro i we do this project without 12 c module

@ElectronicsSimplified7 2 года назад

Possible

@diabolsensei 2 года назад

hi can i get ckt diagram for this project.

@ElectronicsSimplified7 2 года назад

github.com/rolan37/MQ-2-Sensor-Interfaced-with-Arduino

@fakegamer8336 Год назад

does mq-2 measure co2 or co?

@ElectronicsSimplified7 Год назад

Yes

@edscelavancena2133 Год назад

how to connect alarm in this project if lpg or another harmful gas leakage happened

@ElectronicsSimplified7 Год назад

Use a threshold value for detection and digital write the buzzer High...

@edscelavancena2133 Год назад

@@ElectronicsSimplified7 thanks

@edscelavancena2133 Год назад

@@ElectronicsSimplified7 can u teach me how? please

@sakshisuvarna3902 Год назад

hello, is it okay to add MQ9 sensor instead of MQ2 and how about library ? thanks in advance

@ElectronicsSimplified7 Год назад

No it's not okay ... They are two different sensors. They do almost the same job but have been built different over the years.

@ElectronicsSimplified7 Год назад

You could download the MQ9 Sensor library from the internet

@flemyjose4036 2 года назад

why the analog output of sensor is being used instead of digital output

@ElectronicsSimplified7 2 года назад

Digital will just tell us if any particle is sensed or not sensed (0 and 1 - digital).

@ElectronicsSimplified7 2 года назад

We need to figure out what particle is sensed so we take the analog reading to decided what type of particle is being sensed.

@ElectronicsSimplified7 2 года назад

Particle ----> Gas (Thats the simplification). Thank you for your question!

@nirajkalamkar3107 5 месяцев назад

I did the same process which you did but it didn't work the code failed in uploading i didn't changed the code even but still it failed i asked my uncle who is engineer he said this cannot be worked i tried for 4-5 times but it failed

@ElectronicsSimplified7 5 месяцев назад

Check your USB cable. If it's faulty.

@ElectronicsSimplified7 5 месяцев назад

Check your USB cable. If it's faulty.

@user-be3jx1xd1w 3 года назад

Broh! Can uh plzz give MQ5 library

@ElectronicsSimplified7 3 года назад

github.com/mdsiraj1992/Gassensors

@nandagustiawan6237 2 года назад

please library MQ4

@user-ku3rs5yx5i Год назад

How i code into the laptop

@157vaibhavibhalerao5 Год назад

overall price ?

@venkateshakula7373 2 года назад

Bro can I have algorithm of this project tonight same project I have doing in my clg.if u interest to help comment your any social media accounts

@Amazon_offers2 Год назад

bro can you make this without i2c

@AmanKumar-es4wp 2 года назад

Sir I am new student I don't know how to program so plzzz help

@ElectronicsSimplified7 2 года назад

The program is in the GitHub link please check

@lydianandaputri1582 Год назад

mq-6??

@novestkuvimba1469 2 года назад

Hie sir, can you sent us the code for the Arduino.

@ElectronicsSimplified7 2 года назад

github.com/rolan37/MQ-2-Sensor-Interfaced-with-Arduino

@nagakowshik578 2 года назад

sir can u plz help me connection of mu project sir my project is fire and gas detection system with IOT sir

@ElectronicsSimplified7 2 года назад

Sure ... Dm on Instagram electronics simplified

@awiawi117 Год назад

i didn t understand the last step in in 9:18 how do it?

@ElectronicsSimplified7 Год назад

You can just upload the code. By selecting your board.

@awiawi117 Год назад

@@ElectronicsSimplified7 what board sorry i am a beginner can you explain a bit more i did everything like the vid i am just stuck at the last part and i need it for tomrow

@ElectronicsSimplified7 Год назад

You can check some basic videos on how to upload code to Arduino Uno.

@karthik-gz3oz 9 месяцев назад

bro i want zip files

@dextrond.5557 4 месяца назад

Mq2 sensor can’t differentiate gasses,

@ElectronicsSimplified7 4 месяца назад

It can detect all those gases. But it can't find out which gas was detected particularly. But by concentration. It can be predicted. So in a LPG prone leakage zone. You can set the value. That's the whole purpose.

@vidhyakoranga9067 4 месяца назад

Sir please provide the ges sensor code.

@ElectronicsSimplified7 4 месяца назад

Code : www.electronicssimplified.in/feed/code-for-gas-sensor/

@vidhyakoranga9067 4 месяца назад

TQ sir

@ElectronicsSimplified7 4 месяца назад

The code was always available in the GitHub repo

@user-sb4sv4hk9w 4 месяца назад

Sir kindly code and library send kr dy

@ElectronicsSimplified7 4 месяца назад

Link to the code in the description

@patiencemtonhodza2477 2 года назад

can l get the code for this project bro

@ElectronicsSimplified7 2 года назад

It's in the description

@ElectronicsSimplified7 2 года назад

github.com/rolan37/MQ-2-Sensor-Interfaced-with-Arduino

@patiencemtonhodza2477 2 года назад

@@ElectronicsSimplified7 i want to connect a buzzer or speaker and two LED

@patiencemtonhodza2477 2 года назад

@@ElectronicsSimplified7 CAN YOU HELP

@ElectronicsSimplified7 2 года назад

Can you email me at electronicsengineering3@gmail.com

@venkateshakula7373 3 года назад

Vision of arduino pls bro it's an urgent

@ElectronicsSimplified7 3 года назад

ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-CrVo-iCeZ4k.html

@satishmohitsatish1730 2 года назад

Led have no lights

@ElectronicsSimplified7 2 года назад

Can you please elaborate?

@lil_tesla_69 2 года назад

@@ElectronicsSimplified7 hello sir I don't have an Uno board can swap it with nano

@ElectronicsSimplified7 2 года назад

Yes you can

@Crazy_22119 Год назад

Not working bro 😭

@ElectronicsSimplified7 Год назад

Please explain what is not working in detail. Happy New Year!

@Crazy_22119 Год назад

@@ElectronicsSimplified7 i have given all connections everything as per u said when uploading code i uploaded library and i have upload that time problem occurs "16 columns and 2 rows of lcd display" this code is wrong showing i removed that code and uploaded lcd display not show reading

@Crazy_22119 Год назад

Pls tell bro very urgent project bro pls 🙏🙏🙏