IoT Smoke Detector using MQ135 Gas Sensor, Nodemcu ESP8266, and Blynk Application

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Project Description:
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In today’s episode, you will learn how to make an IoT based Smoke Detector system using Nodemcu ESP8266 Wifi module, MQ135 Gas Sensor and Blynk application. The sensor value can be monitored in real-time from anywhere around the world. When the sensor value crosses a certain pre-defined value a notification message is sent to the concerned person.

The PCB board used in this project is sponsored by the PCBway Company which is one of the top leading companies throughout the world. The PCB board Gerber files can be downloaded from the PCBway official website. You can find a link in the description.

In this episode, I will cover

1. MQ135 Sensor Pinout explanation.
2. Complete circuit diagram explanation
3. PCB board layout explanation.
4. Soldering
5. Nodemcu ESP8266 Wifi Module Programming and finally
6. Testing.

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Amazon Purchase links:
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MQ135 Gas Sensor:

Nodemcu ESP8266 WiFi Module:

LM7805 Voltage Regulator:

470uf capacitor:

330-ohm resistor:

DC Female Power Jack:

Female Headers:

Male Headers:

LEDs:

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About the Electronic Clinic:
Electronic Clinic is the only channel on YouTube that covers all the engineering fields. Electronic Clinic helps the students and other professionals to learn electronics designing and programming. Electronic Clinic has tutorials on

Arduino
Raspberry PI
image processing
gsm based projects
Bluetooth based projects
esp8266 projects
Nodemcu projects
robotics
desktop application designing and programming

Project Related Tags:
IoT smoke detector
IoT smoke monitoring
internet of things based smoke monitoring system
the realtime smoke monitoring system
remote smoke monitoring
Smoke notification message

[markofficialvlog]

How to adjust the sensitivity please make a tutorial, Badly needed 😢

[tj]

When I verify the script - an error comes as Error compiling for board Generic ESP8266 Module. -- what board did you use for the arduino ide

[alvinoyoo]

Why connect mq 135 to 3v3 pin yet its typical operating voltage is 5V

[amanmishra-dvhw]

Sir can i use node mcu only cuz
I can not acess a pcb plz respond

[farismnrr]

could you make the program of mq135 input by digital pin, please?

[dablet]

can this MQ135 detect cigarettes being smoked within 10 feet?

[Airbag]

The mq135 uses 5 volts though am I missing something?

[krispy._kay]

Can you swap out the gas sensor with a pir sensor

[mohamadshahfiq]

I have a problem here.. i also have the voltage regulator same like but i did at pcb.. but after i upload the code then i unplug the usb suddenly its not connected.. FYI, i use 12v 1amp for my voltage power supply.. after i remove the sensor.. nodemcu start to connect back.. it’s only disconnected when i’am connect the sensor to the nodemcu.. can u help?

[Adi_k]

My blynkesp8266.h is not Found
I even downloaded the libraries

[muhdhanafi]

Sir, can u list all what to use this project.. thank you..

[raghavendrashekhawat]

My god a printed pcb for such a small circuit 👀👀👀

[maisarah]

can you combine the code in IDE for smoke detector and flame sensor ?

[luisdonaldo]

MQ135 not works with 3.3 volts, be careful if you supply with your esp32