International Journal of Research in Engineering, Science and Management 301

Volume-3, Issue-6, June-2020

www.ijresm.com | ISSN (Online): 2581-5792

IoT Based Smart Gadget for Child Safety and

Tracking
N. Manjunatha1, H. M. Jayashree2, N. Komal3*, K. Nayana4
1
Assistant Professor, Department of Electronics and Communication Engineering, East West Institute of
Technology, Bengaluru, India
2,3,4
Student, Department of Electronics and Communication Engineering, East West Institute of Technology,
Bengaluru, India
*Corresponding author: nkomaljain12@gmail.com

Abstract: This paper is mainly streamed towards child safety Heart-beats, temperature is monitored and the values are
solutions by developing a gadget which can be tracked via its GPS updated to cloud continuously for parent app monitoring.
locations and also a panic button on gadget is provided to alert the Boundary monitoring system is implemented on safety gadget
parent via GSM module calling for help. Parental android app is
developed to manage and track the device anytime. Smart gadget with the help of BEACON technology, as soon as the safety
device is always connected to parental phone which can receive gadget moves far away from the binding gadget an alert is
and make phone calls and also receive SMS on gadget via GSM provided to parent on binding gadget. the system is used to
module, also a wireless technology is implemented on device which monitor the health parameters and also used for location
is useful to bound the device within a region of monitoring range, tracking during necessary situations in safety concern.
if device is moving out of monitoring range then an alert will be
triggered on binding gadget, this helps you keep a virtual eye on
child. Health monitoring system on gadget checking for 2. Literature Survey
parameters like heart beat/pulse rate and temperature is included [1] Authors: M Nandini Priyanka, S Murugan, K. N. H.
which can be monitored on parental app. Gadget also monitors Srinivas, T. D. S. Sarveswararao, E. Kusuma Kumari.
whether it is plugged on hand or not using contact switch and alert Title: Smart IoT Device for Child Safety and Tracking.
the parent as soon as it is unplugged.
Published in: 2019 IEEE.
Keywords: IoT, Children safety, Arduino mega [ATMEGA The system is developed using Link-It ONE board
2560]; GPS, GSM, Sensor, Mobile communications, Smart phone. programmed in embedded C and interfaced with temperature,
heartbeat, touch sensors and also GPS, GSM & digital camera
1. Introduction modules. The novelty of the work is that the system
The internet of things (IoT) refers to the set of devices and automatically alerts the parent/caretaker by sending SMS, when
system that stay interconnected with real-world sensor and to immediate attention is required for the child during emergency.
the internet. During years’ Child safety is under threat and it is Merits: The parameters such as touch, temperature &
very important to provide a technology-based solution which heartbeat of the child are used for parametric analysis and
will help them under panic situations and monitor them using a results are plotted for the same.
smart gadget. The proposed system is equipped with GSM and Demerits: To implement the IoT device which ensures the
GPS modules for sending and receiving call and SMS between complete solution for child safety problems.
safety gadget and parental phone, the proposed system also [2] Authors: Akash Moodbidri, Hamid Shahnasser
consists of Wi-Fi module used to implement IoT and send all Title: Child safety wearable device.
the monitoring parameters to the cloud for android app Published in: 2017 IEEE.
monitoring on parental phone. Android application can be used The purpose of this device is to help the parents to locate their
to track the current location of safety gadget using its location children with ease. At the moment there are many wearable’s
coordinates on parental phone android app and also via SMS in the market which helps to track the daily activity of children
request from parent phone to safety gadget. Panic alert system and also helps to find the child using Wi-Fi and Bluetooth
is used during panic situations and automatic SMS alert and services present on the device.
phone call is triggered from safety gadget to the parental phone Merits: This wearable over other wearable is that it can be
seeking for help and also monitored for plug and unplug from used in any phone and it is not necessary that an expensive
hand, as soon the gadget is unplugged from hand a SMS is smartphone is required and doesn’t want to be very tech savvy
triggered to parental phone and the alert parameter is also individual to operate.
updated to the cloud. Demerits: As, this device’s battery gives short life-time. High
power efficient model will have to be used which can be
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Volume-3, Issue-6, June-2020
www.ijresm.com | ISSN (Online): 2581-5792

capable of giving the battery life for a longer time. frequency. GSM network consists of mobile station, base
[3] Authors: Aditi Gupta, Vibhor Harit. station subsystem network and operation subsystem. The GPS
Published in: 2016 IEEE. module is provided for identifying the location of the child.
Title: Child Safety & Tracking Management System by using GPS module receives the signals from satellites. The latitude
GPS. and longitude of the location can be identified by the GPS
This paper proposed a model for child safety through smart module. The device sends the monitored parameters data such
phones that provides the option to track the location of their as temperature and pulse rate to cloud. If any abnormalities
children as well as in case of emergency children is able to send occurs in temperature or pulse rate readings, a SMS and call
a quick message and its current location via Short Message triggers to the parent/caretaker mobile phone immediately and
services. also updated to the mobile app only for the registries mobile no.
Merits: The advantages of smart phones which offers rich We can use mobile application, cloud and database as the back
features like Google maps, GPS, SMS etc. end of storing and retrieving information and also a device for
Demerits: This system is unable to sense human behavior of monitoring.
child.
[4] Authors: Dheeraj Sunehera, Pottabhatini Laxmi Priya.
Title: Children Location Monitoring on Google Maps Using
GPS and GSM.
Published in: 2016 IEEE.
This paper provides an Android based solution for the
parents to track their children in real time. Different devices are
connected with a single device through channels of internet.
The concerned device is connected to server via internet. The
device can be used by parents to track their children in real time
or for women safety. The proposed solution takes the location
services provided by GSM module. It allows the parents to get
their child’s current-location via SMS.
Merits: A child tracking system using android terminal and
hoc networks.
Demerits: This device cannot be used in rural areas.

3. Proposed System
A. Safety Gadget
Figure 1 shows the block diagram of the proposed child Fig. 1. Block diagram of smart gadget
safety device. It consists of inbuilt Wi-Fi, GSM, GPS and B. BLE Listener device
Bluetooth modules. The link it one board is similar to the
Arduino board and it is termed as all-in-one prototyping board Figure 2 shows the BLE Listener device is the device which
for safety and IoT devices. The link it one is a robust is used to satisfy this feature along with safety gadget and
parental phone. This gadget is also used to monitor safety
development board for the hardware and also used for industrial
applications. Different components such as temperature sensor, gadget within a bounded area using wireless technology as
follows, this feature of binding gadget is designed to work
heartbeat sensor, panic button, contact switch are connected to
the link it ONE board along with built in GSM, GPS modules. independently without phone network signal/internet so that
Safety gadget consists of BEACON and BLE packet is safety gadget can even be under monitoring when it reaches
remote areas where communication signals is not reachable like
transmitted through it, this packet is received by binding gadget
which has BLE receiver module, the packet usually contains forest. Safety gadget consists of BEACON and BLE packet is
transmitted through it, this packet is received by binding gadget
information such as identification number, signal strength etc.
which has BLE (Bluetooth Low Energy) receiver module, the
Temperature is one of the most commonly measured variables.
For measuring body temperature of the child DS18B20 packet usually contains information such as identification
temperature sensor is used. The heartbeat sensor is used in the number, signal strength etc. Whenever the packet is received it
proposed system for measuring the pulse rate. There is a checks for all the above information in the receiver device.
heartbeat/pulse sensor which is combined to simple optical As the distance between safety gadget and binding gadget
heart rate sensor with amplification and nullification circuitry increases, the signal strength decreases. Once the safety gadget
is moving out of threshold distance from the binding gadget
making it is fast and easy to get reliable pulse reading. The
then an alert is provided on binding gadget which will be used
GSM/GPRS block is activated with a SIM card on the board.
They mainly differ based on bandwidth and RF carrier by parent/guardian.
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www.ijresm.com | ISSN (Online): 2581-5792

connected to cloud via Wi-Fi technology and hence the GPS

location is updated to the cloud at regular intervals or on
request, whenever parent want to monitor the location of safety
device then parental app can be used which fetches all the data
from the updated cloud and also display the current/live
location of the safety gadget.
2) Panic Alert System: The gadget is equipped with panic
alert system feature which mainly consist of a button that is
triggered only during certain abnormal/panic situations, this
button is programmed in such a way that, once it is triggered
then multiple alerts in various forms occurs within few seconds
of time, SMS and also phone call is triggered to the parental
phone from the safety gadget GSM module to the parental
Fig. 2. Block diagram of BLE listener device phone, which consists of current location of gadget fetched
C. Tools Used from its GPS and a pre-installed panic message seeking for
Hardware Requirements: help. An alert notification on parental app is triggered via Wi-
• Arduino Mega [ATMEGA 2560]. Fi on safety gadget communicating to cloud where parental app
• GSM SIM 800C. receives the information.
• GPS Neo 6m. 3) Stay Connected Feature: This feature is to communicate
• 20X4 LCD. between safety gadget (GSM module) and parental phone
• I2C LCD Driver always connected irrespective of the situation, safety gadget can
• 7805 Voltage Regulator. make a phone call anytime to parental phone and vice-versa.
• Heart Beat Sensor. Safety gadget which will be displayed on its screen.
• DS18B20 Temperature Sensor. 4) Health Monitoring System: The gadget consists of heart
• 1x4 Switch. beat and temperature sensor which is used to monitor the
• ESP8266-12E general health condition of child. Any abnormalities being
• Push Button detected in the health monitoring parameters by the safety
• Logic Level Convertor gadget then an immediate alert is sent on the parental app via
• Buzzer Wi-Fi. Also, displays on parental app.
• LED 5) Gadget Plug and Unplug Monitoring: This feature is to
• ESP32 keep monitoring if the safety gadget is plugged or not by
• OLED monitoring the contact switch, necessary alerts are provided on
• Jumper Cables parental app whenever the device is unplugged.
6) Boundary Monitoring System: Binding gadget is the
Software Requirements: device which is used to satisfy this feature along with safety
• Arduino IDE gadget and parental phone. This gadget is used to monitor safety
• Android Studio gadget within a bounded area using wireless technology. Once
the safety gadget is moving out of the threshold distance from
Languages Used: the BLE listener device then an alert is provided on device
• Embedded C itself, which will be used by parent/guardian. This feature of
• Java binding gadget is designed to work independently without
phone network signal/internet so that safety gadget can even be
4. Methodology under monitoring when it reaches remote areas where
communication signals are not reachable like forest.
This paper mainly focuses on child safety solutions which
contain two major devices namely Smart gadget and BLE A. Software Specification
Listener device. The system also includes an Android app The Arduino Software (IDE) which is an open-source and
namely Parental App which will be developed and installed on makes it easy to write the code as well as to upload in to the
parental phone. board. It runs on the Linux, Mac, IOS and Windows. The
This paper consists of 6 modules as follows: programs are written in Java, based on the Processing and other
1) Live Location Tracking: Safety gadget contains a GPS open-source software. This software makes the interfacing with
module which will fetch the current location and sends it to the Arduino-Uno much more reliable. The primary reason for using
microcontroller for required processing, the safety gadget is the GS shield as the mode of communication over Wi-Fi and
also installed with the GSM module to respond for location Bluetooth was that this gadget was aimed at being accessible to
request sent via SMS from parental phone. The system is any smartphone user. Also, to make the user- friendly as
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www.ijresm.com | ISSN (Online): 2581-5792

possible.
Applications for the Android operating system are
programmed using the SDK Android software development kit
and Java programming language that also may be used with C
or C++. The Android Studio is the official programming
environment that allows developers to build Android apps. The
idea behind the Android app has been derived from having an
automated bot to respond to text message responses from the
user. It will provide the user with pre-defined response options
at just the click of a button. The user doesn't need to memorize Fig. 5. Outputs of health monitoring system
the specific keywords to send. Also, the both will be pre-
programmed to present the user with a set of pre-defined 5) Gadget Plugged or Unplugged Monitoring: Gadget plug
keyword options such as “DEVICE_LOCATION”. or unplugged is monitored using contact switch installed on
smart gadget, as soon as the device is unplugged, an alert is
5. Results provided to parent phone via SMS and it is also updated to cloud
1) Live Location Tracking: GPS is installed on gadget to for app monitoring.
track its current location can be tracked on android app and via 6) Boundary monitoring system: This is used to track the
SMS request sent from parent phone to safety gadget. safety gadget using the binding gadget by implementing signal
strength concept as soon as the safety gadget moves far away
from the BLE listener gadget then an alert is provided to itself.

Fig. 3. Outputs of live location tracking

2) Panic Alert Systems: Panic alert system on gadget is

triggered during panic situation, automatic call and SMS are Fig. 6. Listener device and broad cast device
triggered to parental phone. The alert is also updated to the
cloud for purpose of app monitoring.

Fig. 4. Outputs of panic alert system

Fig. 7. Overview of safety gadget
3) Stay Connected Feature: Stay connected feature is used to
trigger call and pre-defined SMS anytime from gadget to Figure 7 shows the circuit connection with sensors. The
parental phone by just pressing a button and also parent can temperature sensor, pulse sensor, BLE module, GSM module
make SMS and call to the gadget anytime. and GPS module are shown.
4) Health Monitoring System: Health monitoring system is
implemented using heart beat sensor, temperature sensor which 6. Limitation
is updated to the cloud and also can be monitored via app. The The system is dependent on communication signal/network
current value of sensors can be obtained using SMS request sent signal for the smart gadget to trigger automatic phone call/SMS
to gadget from parent phone. during panic situation. It can be difficult to detect when network
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Volume-3, Issue-6, June-2020
www.ijresm.com | ISSN (Online): 2581-5792

signal is not reachable/weak/when the smart gadget moves Prof., for his precious guidance and for East West Institute of
outside the boundary range. Hence, it can be improved by Technology, Bengaluru, Karnataka, India for providing this
increasing the range. opportunity.

7. Conclusion References
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We would like to thank our guide Mr. Manjunatha N, Asst. 8th IEEE GCC Conference and Exhibition, Muscat, Oman, 1-4 February
2015.