Emergency Notification System

Introduction: Emergency notification systems play a crucial role in ensuring the safety and security of individuals in various environments. These systems are designed to quickly and efficiently alert people about potential emergencies, allowing them to take appropriate actions. In this article, we will explore the concept of an Emergency Notification System and provide examples of Arduino-based projects that demonstrate its functionality.

Project: The project we will create as an example is an Arduino-based Emergency Notification System. The objective of this system is to send emergency alerts to a predefined list of recipients via SMS or email. The system will be equipped with various sensors to detect emergencies such as fire, gas leaks, or intrusions. Upon detection, the system will trigger the appropriate notification method to inform the recipients about the emergency.

Components Required: To build the Emergency Notification System, the following components are required:

1. Arduino Uno
2. GSM/GPRS Module (SIM800L)
3. PIR Motion Sensor
4. Gas Sensor (MQ-2)
5. Fire Sensor (Flame Sensor)
6. Buzzer
7. LED
8. Jumper Wires
9. Breadboard

Note: Links for purchasing the components can be found at the end of the article.

Examples: Example 1: Sending SMS Notifications

#include <SoftwareSerial.h>

SoftwareSerial sim800l(10, 11); // RX, TX

void setup() {
  sim800l.begin(9600);
  Serial.begin(9600);
}

void loop() {
  if (emergencyDetected()) {
    sendSMS("Emergency Alert: Fire detected!");
    delay(10000); // Wait for 10 seconds before sending another SMS
  }
}

bool emergencyDetected() {
  // Code to check if fire is detected using the flame sensor
}

void sendSMS(String message) {
  sim800l.println("AT+CMGF=1"); // Set SMS mode to text
  delay(1000);
  sim800l.println("AT+CMGS=\"+1234567890\""); // Replace with recipient's phone number
  delay(1000);
  sim800l.println(message);
  delay(1000);
  sim800l.println((char)26); // End of message character
  delay(1000);
}

Example 2: Sending Email Notifications

#include <SoftwareSerial.h>

SoftwareSerial sim800l(10, 11); // RX, TX

void setup() {
  sim800l.begin(9600);
  Serial.begin(9600);
}

void loop() {
  if (emergencyDetected()) {
    sendEmail("Emergency Alert", "Fire detected!");
    delay(10000); // Wait for 10 seconds before sending another email
  }
}

bool emergencyDetected() {
  // Code to check if fire is detected using the flame sensor
}

void sendEmail(String subject, String message) {
  sim800l.println("AT+SMTPAUTH=1"); // Enable SMTP authentication
  delay(1000);
  sim800l.println("AT+SMTPFROM=\"your-email@example.com\""); // Replace with your email address
  delay(1000);
  sim800l.println("AT+SMTPRCPT=0,0,\"recipient-email@example.com\""); // Replace with recipient's email address
  delay(1000);
  sim800l.println("AT+SMTPSUB=\"" + subject + "\"");
  delay(1000);
  sim800l.println(message);
  delay(1000);
  sim800l.println((char)26); // End of message character
  delay(1000);
}

Note: The example codes provided are simplified and may require additional configuration and error handling for proper functionality. Please refer to the respective component datasheets and Arduino libraries for more detailed implementation guidance.

By building an Emergency Notification System using Arduino, we can enhance the safety and security of various environments, including homes, offices, and public spaces. The system can be customized and expanded to incorporate additional sensors and notification methods, depending on specific requirements.