Gas Leakage Detection and Email-Notification

There are several different MQ sensors on the market that can detect different things including alcohol, ethanol, carbon monoxide, hydrogen gas, ammonia, smoke, butane, methane, LPG, and smoke. Systems for smoke detection, gas detection, and air quality monitoring frequently employ these sensors. The MQ4 gas sensor and the MQ135 air quality sensor were two that we previously employed.

Today, we’ll construct an LPG leakage detector utilising the ESP32 and the MQ-5 sensor. We will use the IFTTT platform and ESP32 HTTP GET REQUEST to send emails to any address. The email is automatically delivered when a gas/LPG leak is detected that exceeds a specified threshold value. Thus, this ESP32 Email Notifier system alerts users to promptly close the valve or take other action. This system can be used as a safety system in industry or at home

Hardware Required

1. ESP32 Board
2. Gas Sensor
3. Data Cable
4. USB Adapter
5. Breadboard

Software Required

1. Arduino IDE
2. IFTTT (Online Platform)

ESP32 Development Board

MQ5 Gas Sensor

Let’s Begin to Build

STEP 1 : First of all, Let’s Begin with the circuit. All you want to do is just connect the MQ5 sensor module with the ESP32 like in the circuit below.

Connect the sensor VCC pin to the 5v pin of the ESP32 and connect the Ground (GND) pin of the sensor with the GND pin of ESP32. Also, Connect the analog output pin (A0/AOUT) to PIN 34 of ESP32.

If your connected all connections properly, let’s move to the STEP 2.

STEP 2 :

Now Let’s Move to the software side:-
For getting E-mail notifications, you need a Gmail account. If your going to use your old Gmail account you can goto STEP 4. Otherwise if you dont have an Email, you need to create an acoount on Google to get a new Gmail , Follow the intsructions below.

To create a new Google account, Open the link given . https://accounts.google.com/signup/v2/webcreateaccount?flowName=GlifWebSignIn&flowEntry=SignUp

STEP 2 : Alright, so you have Gmail. Let’s Go to the IFTTT Website to set up our Account and start using the service. https://ifttt.com

Code

Here is your full code. Copy and Paste it into the Arduino IDE and Upload it to the ESP32.

#include <WiFi.h>

#include <HTTPClient.h>

**************************************************************************************************************

String serverName = "https://maker.ifttt.com/trigger/gas/with/key/{*********YOUR KEY*********}";

**************************************************************************************************************

const char* ssid = "***YOUR SSID***";

const char* password = "***YOUR PASSWORD***";

#define sensorPin 34
#define threshold 40

unsigned long lastTime = 0;
unsigned long timerDelay = 15000;

void setup() {
  Serial.begin(115200);

  WiFi.begin(ssid, password);
  Serial.println("Connecting");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP());

}

void loop() {

  unsigned int sensorValue = analogRead(sensorPin);
  unsigned int outputValue = map(sensorValue, 0, 1023, 0, 255);

  if (outputValue > threshold) {
    if ((millis() - lastTime) > timerDelay) {

      if (WiFi.status() == WL_CONNECTED) {

        HTTPClient http;

        http.begin(serverName.c_str());

        int httpResponseCode = http.GET();

        if (httpResponseCode > 0) {
          Serial.print("HTTP Response code: ");
          Serial.println(httpResponseCode);
          String payload = http.getString();
          Serial.println(payload);
        }
        else {
          Serial.print("Error code: ");
          Serial.println(httpResponseCode);
        }

        http.end();
      }
      else {
        Serial.println("WiFi Disconnected");
      }
      lastTime = millis();
    }
  }
  
}

Conclusion

Hope this blog helps you to understand how to design a Gas Leakage Detector with Email Alert Notification using ESP32. We, MATHA ELECTRONICS  will come back with more informative blogs.