Fire, Gas and Smoke Detector

This project can detect gas leaks, fire and smoke and when powered by a nine volt adapter can act as a gas leak detector for kitchens.

Oct 26, 2019

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88962 views

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4 respects

environmental sensing

home automation

monitoring

Devices & Components

Arduino Mega 2560 Rev3

Buzzer, Piezo

Jumper wires (generic)

9V battery (generic)

5 mm LED: Green

Breadboard (generic)

Flame Sensor

9V Battery Clip

5 mm LED: Red

MQ2 gas and smoke sensor

Hardware & Tools

Multitool, Screwdriver

Software & Tools

Arduino IDE

Arduino Web Editor

Project description

Code

FIre and gas detection sensor

arduino

1#include<SoftwareSerial.h>
2int redLed = 12;
3int greenLed = 11;
4int   buzzer = 10;
5int smokeA0 = A0;
6int sensorPin = A1;
7int sensorThres = 500;
8
9void   setup() {
10  pinMode(redLed, OUTPUT);
11  pinMode(greenLed, OUTPUT);
12  pinMode(buzzer,   OUTPUT);
13  pinMode(smokeA0, INPUT);
14  pinMode(sensorPin,INPUT);
15  
16   Serial.begin(9600);
17}
18
19void loop() {
20  int analogSensor = analogRead(smokeA0);
21
22   Serial.print("Pin A0: ");
23  Serial.println(analogSensor);
24  if (analogSensor   > sensorThres)
25  {
26    digitalWrite(redLed, HIGH);
27    digitalWrite(greenLed,   LOW);
28    tone(buzzer, 1000, 200);
29  }
30  else
31  {
32    digitalWrite(redLed,   LOW);
33    digitalWrite(greenLed, HIGH);
34    noTone(buzzer);
35  }
36  delay(100);
37
38Serial.println("Flame   Sensor");
39
40int sensorValue = analogRead(sensorPin);
41
42Serial.println(sensorValue);
43
44if   (sensorValue < 100)
45
46{
47
48Serial.println("Fire Detected");
49
50Serial.println("LED   on");
51
52digitalWrite(redLed,HIGH);
53digitalWrite(greenLed,LOW);
54tone(buzzer,1000,200);
55
56}
57else
58{
59digitalWrite(redLed,LOW);
60digitalWrite(greenLed,HIGH);
61noTone(buzzer);
62}
63delay(100);
64
65}

#include<SoftwareSerial.h>
int redLed = 12;
int greenLed = 11;
int   buzzer = 10;
int smokeA0 = A0;
int sensorPin = A1;
int sensorThres = 500;

void   setup() {
  pinMode(redLed, OUTPUT);
  pinMode(greenLed, OUTPUT);
  pinMode(buzzer,   OUTPUT);
  pinMode(smokeA0, INPUT);
  pinMode(sensorPin,INPUT);
  
   Serial.begin(9600);
}

void loop() {
  int analogSensor = analogRead(smokeA0);

   Serial.print("Pin A0: ");
  Serial.println(analogSensor);
  if (analogSensor   > sensorThres)
  {
    digitalWrite(redLed, HIGH);
    digitalWrite(greenLed,   LOW);
    tone(buzzer, 1000, 200);
  }
  else
  {
    digitalWrite(redLed,   LOW);
    digitalWrite(greenLed, HIGH);
    noTone(buzzer);
  }
  delay(100);

Serial.println("Flame   Sensor");

int sensorValue = analogRead(sensorPin);

Serial.println(sensorValue);

if   (sensorValue < 100)

{

Serial.println("Fire Detected");

Serial.println("LED   on");

digitalWrite(redLed,HIGH);
digitalWrite(greenLed,LOW);
tone(buzzer,1000,200);

}
else
{
digitalWrite(redLed,LOW);
digitalWrite(greenLed,HIGH);
noTone(buzzer);
}
delay(100);

}

FIre and gas detection sensor

arduino

1#include<SoftwareSerial.h>
2int redLed = 12;
3int greenLed = 11;
4int  buzzer = 10;
5int smokeA0 = A0;
6int sensorPin = A1;
7int sensorThres = 500;
8
9void  setup() {
10  pinMode(redLed, OUTPUT);
11  pinMode(greenLed, OUTPUT);
12  pinMode(buzzer,  OUTPUT);
13  pinMode(smokeA0, INPUT);
14  pinMode(sensorPin,INPUT);
15  
16  Serial.begin(9600);
17}
18
19void loop() {
20  int analogSensor = analogRead(smokeA0);
21
22  Serial.print("Pin A0: ");
23  Serial.println(analogSensor);
24  if (analogSensor  > sensorThres)
25  {
26    digitalWrite(redLed, HIGH);
27    digitalWrite(greenLed,  LOW);
28    tone(buzzer, 1000, 200);
29  }
30  else
31  {
32    digitalWrite(redLed,  LOW);
33    digitalWrite(greenLed, HIGH);
34    noTone(buzzer);
35  }
36  delay(100);
37
38Serial.println("Flame  Sensor");
39
40int sensorValue = analogRead(sensorPin);
41
42Serial.println(sensorValue);
43
44if  (sensorValue < 100)
45
46{
47
48Serial.println("Fire Detected");
49
50Serial.println("LED  on");
51
52digitalWrite(redLed,HIGH);
53digitalWrite(greenLed,LOW);
54tone(buzzer,1000,200);
55
56}
57else
58{
59digitalWrite(redLed,LOW);
60digitalWrite(greenLed,HIGH);
61noTone(buzzer);
62}
63delay(100);
64
65}

#include<SoftwareSerial.h>
int redLed = 12;
int greenLed = 11;
int  buzzer = 10;
int smokeA0 = A0;
int sensorPin = A1;
int sensorThres = 500;

void  setup() {
  pinMode(redLed, OUTPUT);
  pinMode(greenLed, OUTPUT);
  pinMode(buzzer,  OUTPUT);
  pinMode(smokeA0, INPUT);
  pinMode(sensorPin,INPUT);
  
  Serial.begin(9600);
}

void loop() {
  int analogSensor = analogRead(smokeA0);

  Serial.print("Pin A0: ");
  Serial.println(analogSensor);
  if (analogSensor  > sensorThres)
  {
    digitalWrite(redLed, HIGH);
    digitalWrite(greenLed,  LOW);
    tone(buzzer, 1000, 200);
  }
  else
  {
    digitalWrite(redLed,  LOW);
    digitalWrite(greenLed, HIGH);
    noTone(buzzer);
  }
  delay(100);

Serial.println("Flame  Sensor");

int sensorValue = analogRead(sensorPin);

Serial.println(sensorValue);

if  (sensorValue < 100)

{

Serial.println("Fire Detected");

Serial.println("LED  on");

digitalWrite(redLed,HIGH);
digitalWrite(greenLed,LOW);
tone(buzzer,1000,200);

}
else
{
digitalWrite(redLed,LOW);
digitalWrite(greenLed,HIGH);
noTone(buzzer);
}
delay(100);

}

Downloadable files

Schematic

THE pins are to be connected as such MQ2 sensor A0-A0 gnd -gnd vcc-5 v flame sensor analog -A1 vcc-5 v gnd-gnd green led -digital pin 11 red led-digital pin 12 buzzer- ditital pin 10 buzzer and led gnd to arduino's gnd The mq 4 sensor in the fritzing file has the safe config as the mq 2 sensor. The flame sensor also is the one which i found on fritzing but the one which i have used can be bought from the following link https://www.flipkart.com/rotobotix-fire-flame-sensor-module/p/itmefvrkaevfwpee?gclid=CjwKCAjwo9rtBRAdEiwA_WXcFqBWJgasifZo2X3zWz6o8nJwQT2OZ3zHCLg2yew_anP1qPaYZznAKRoCHgwQAvD_BwE&pid=ETYEFVRKR4F7ZBDH&lid=LSTETYEFVRKR4F7ZBDHQFGCGR&marketplace=FLIPKART&cmpid=content_learning-toy_8965229628_gmc_pla&tgi=sem,1,G,11214002,g,search,,301302884581,1o1,,,c,,,,,,,&ef_id=CjwKCAjwo9rtBRAdEiwA_WXcFqBWJgasifZo2X3zWz6o8nJwQT2OZ3zHCLg2yew_anP1qPaYZznAKRoCHgwQAvD_BwE:G:s&s_kwcid=AL!739!3!301302884581!!!g!297659526198!

Schematic

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