GPS-based Child Tracker with Emergency Text Alerts IoT Project

The hectic life of parents makes it very difficult to personally look after the kids. To overcome the problem of personal monitoring of children, we have come up with the idea of a GPS-based tracker with text alerts when the child is not present in the specified region.

Problem Statement:

To solve the problem of difficulty in keeping a check on children while they are playing in open areas while letting the children have their freedom to play from constantly being mocked by parents and to monitor the whereabouts of children by working parents. There is a similar project on Women Security System that can be seen here

Project Working Process:

Hardware Components

  • Arduino UNO
  • GPS Module
  • GSM/GPRS Module 

Software’s Used

  • Arduino IDE
  • Android (MIT App Inventor)

In this context, the solution we propose is a GPS-based Child Tracker with Emergency Text Alerts android application that can help parents in tracking the presence of their children. This application works with the help of android mobile-enabled with the ‘SMS’ feature and ‘Global-Positioning System (GPS)’ on the GSM network.

This Child Tracker with Emergency Notifier application works in two ways, the first is GPS-based is related to Location services, and the second is SMS-based which is related to Network services. In case when the Location-based services not working then the application alternatively use Network-based services that can send and receive messages.

Block Diagram:


The GSM and GPS module is connected to Arduino Uno. The GSM module has a sim (data) through which we can receive message alerts and the GPS helps to track the location.

The data is sent to the cloud from GSM using AT commands and HTTP. The cloud is connected to the mobile app and the data is displayed in the app installed on the parent’s mobile.

Useful Projects on Self Security in Emergency Situations:

Self Security through GPS based Protection System

Stay Safe Women Security Android App Project Report

The GPS-based Child Tracker with Emergency Text Alerts app is integrated with maps and geo-fence.

The GPS is connected to Arduino using a VCC pin, GND pin, RX pin, and TX pin. Connections: VCC to 3V3, GND to GND, RX to TX, and TX to RX respectively. GSM is connected to Arduino using VCC, GND, RX, and TX pins. Connections: VCC to 5V, GND to GND, pin 3 to TX, pin 4 to RX respectively.

A tiny GPS++ library is included. Using IBM cloud (node-red flow editor) the data is sent to a mobile app developed using MIT app inventor.

Cloud-enabled Vehicle Theft and Accident Detection System Project

For vehicle theft, in this project for the opening of the door we first click on the button, after a few seconds we get an OTP (random number) generated by Arduino through the GSM module to the phone number stored in the Arduino, we again text back the same random number.

After some time the OTP will be checked, if it’s correct the door will be opened, in our Vehicle Theft and Accident Detection System project the servo motor rotates, if it’s wrong the buzzer will ring indicating someone is opening or stealing the vehicle

A mobile phone is also used for the owner’s interaction with the device installed in the vehicle, so that, when the owner wants to track the vehicle, only he/she can do it.


In this Cloud-enabled Vehicle Theft and Accident Detection System Project work, we use the accelerometer to detect the position on different axis (to detect the toppling condition) of the vehicle during an accident. The output of the accelerometer acts as an input to the microcontroller present on the board. The GSM & GPS module fitted onto the device computes the latitude and longitude value for the vehicle. The time, latitude, and longitude values are recorded periodically. The sensor value is transmitted to the cloud in the event of an occurrence of an accident.

A continuous application runs in the background and recursively compares each vehicle’s sensor field to some standard value. A deviation from the standard value retrieves the address of the location from the last updated longitude and latitude via the API.

The occurrence of an accident is promptly reported to nearby hospitals and the police through the messaging service. With the GSM and GPS module installed in the device, the location of the car can be tracked in real-time, which helps the police to recover a stolen car.

Download the complete CLOUD-ENABLED-VEHICLE-THEFT-AND-ACCIDENT-DETECTION-SYSTEM source code, Project Report, PPT, and Output Video Files and Android apk.

Women Security Band – Smart and Handy Security Device for Women Project

Objective :

  • To design and develop a smart and handy security device for Women.
  • To alert people in its vicinity and relatives of the victim about the attack and also get help from emergency services.
  • To track the user using google maps under crucial situations.
  • The module developed should be capable to work automatically under crucial situations.

Introduction :

Women Security device is a device that will help women to walk freely in the streets anywhere and at any time. The goal of the women’s security device is to protect women from getting molested in different ways like rape, sexual harassment, abuse, etc. There are existing apps or devices to provide security to women but there are drawbacks to these existing apps or devices. So to overcome such drawbacks and provide security in an enhanced way we are going to propose the women’s security device.

Technical Details :

Following modules/sensors to detect the crucial situation:

1. Pulse rate sensor:

Pulse rate will be the major parameter for the security device because
whenever the person is in danger person’s heartbeat gets increased. So using this parameter we can consider that person can be in danger.

2. Temperature sensor:

This is the second parameter that can be considered when the person is in
danger its temperature starts decreasing so this can be considered as one of the parameters to detect that the person is in danger.

3. Motion sensor:

This is the third parameter we can consider as when the person is in danger due to
fear or anxiety person’s body starts shaking or shivering. So this can be considered as another parameter to send alarm message or call to relatives.

4. Voice Recognition.

We will be using this parameter as well to detect dangerous situations. We will be recording the “HELP” word and when the person shouts when is in danger then by detecting and comparing it with the already recorded word and if it crosses a certain limit of intensity range then we can consider it as a dangerous situation to send alarm message or call to the relatives of the person.

Using the above sensors will provide input to our device
Also to track the user and send emergency messages to listed
contacts and to the nearest police station two modules are used

Problem Statement

To develop an easy-to-carry system that will work automatically without any manual inputs to provide security for women.
Importance of the project.

The expected outcome of the project

A wearable security device that will be user-friendly and feature train the device according to different users. Module to add and remove authorized people for sending alerts to them. Location will be considered while sending alerts.

Functional Requirements:

The user of the Bracelet:-

1. System would Identify the critical situation and normal situation automatically.
2. System would get emergency help automatically when the victim is under attack.
3. System would Blink the LED for 10 secs when a critical situation is detected.
4. Track the nearby victim/friend/relative in an emergency using Google Maps.
5. System would alert the vicinity people.
6. System would get emergency help when the SOS button is pressed manually.
7. Add the contact numbers of friends/relatives on the application to ask help for in an emergency.
8. Login with the already provided unique number using the mobile application.
9. Save the button on the System to write those numbers into GSM.
10. Reset button on the System to reset all previously saved numbers into GSM.

Other than the victim/ User of the Bracelet:-

1.Log in with a verified mobile number.

2. Track the nearby victim/friend/relative in an emergency using Google Maps.

External Interface Specifications:

1. User Interface:-

The user of the Band:-

1. Login.
2. Add the contact numbers of friends/relatives.
3. Tracking the victim using Google Maps.

Other than victim/ User of the Band:-

1. Login.
2. Tracking the victim using Google Maps.

2. Database:-

Firebase Cloud will be used for real-time database storage.

3. Google Maps API will be used for tracking the user.

Technical Specification: There will be one android app and a smart band.

Languages & Technologies:

Languages: C, C++, JAVA, Firebase database
IDE: Arduino, Android Studio