International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 13 Issue: 08 | Aug 2026
p-ISSN: 2395-0072
www.irjet.net
IoT-Based Smart Tourist Safety Monitoring System 1
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K. Chiranjeevi , P.Dowl Basha , N.Pushparaj , N. Siddhu Naik , Ch. Abhiram
1Assistant Professor, 2,3,4,5Student, Dept. of Information Technology, Vidya Jyothi Institute of Technology,
Hyderabad, Telangana, India -------------------------------------------------------------------------***----------------------------------------------------------------------the situation worse. Abstract - Tourism keeps growing every year, and with it grows the number of people travelling into places they don't know well - forests, hill routes, pilgrimage circuits, and stretches of coastline with little to no infrastructure around them. When something goes wrong in one of these places, be it an accident, a medical emergency, theft, harassment, or a sudden natural event, help is often slow to arrive simply because the person in trouble cannot say exactly where they are, or cannot reach anyone at all. This paper describes a small, battery-powered device we built to close that gap: an IoT-based tourist safety system that watches a few basic environmental signals, tracks GPS location continuously, and fires off an emergency alert the moment something is wrong. At the core sits an Arduino Uno (ATmega328P) wired to a DHT11 temperature sensor, a sound sensor, a NEO-6M GPS module, a SIM800L GSM module, an SOS push button, an LED, a buzzer, and a rechargeable 3.7 V Li-ion cell charged through a TP4056 board. Pressing the SOS button, or the sensors crossing an unusual threshold, makes the controller pull the latest GPS fix and push it out as an SMS to a saved contact number. At almost the same time, a small Python script sitting on a connected computer picks up the same event over serial and fires off a Gmail alert with a ready-to-tap Google Maps link. In our bench tests the whole chain - button press to SMS - usually finished in under ten seconds. Because the design leans on GSM rather than mobile data, it keeps working in places where a typical safety app would simply stop functioning, which is exactly the situation it was built for.
We've all read the news stories - tourists cut off by landslides, caught in flash floods, or stuck after a road accident somewhere with barely any signal. These stories point to a real gap between what safety technology promises on paper and what actually works once someone steps outside city limits. Most touristsafety apps today assume a smartphone with a live data connection. That works fine in a city, but the moment a tourist walks out of 4G/5G range - which happens a lot on trekking routes and pilgrimage circuits - the whole system stops being useful. This is where the Internet of Things starts to help. Cheap sensors, small microcontrollers, and wireless radios can now be packed into a device small enough to carry, and that device doesn't need to depend on a smartphone's battery or its data plan [2]. It can run on its own small battery and talk over plain GSM voice/SMS, a network that reaches areas mobile internet often doesn't. Carried separately from a phone, such a device gives a tourist a safety net that isn't tied to whether their phone is charged, in their pocket, or even switched on. In this paper we describe a prototype built around exactly that idea: an Arduino Uno paired with a few sensors, an SOS button, a GPS receiver, and a GSM module, all working together to send out a locationtagged alert the moment something goes wrong. We also added a second channel - a small Python program that listens to the same event over a serial link and emails a Google Maps link through Gmail - so the alert isn't riding on a single point of failure. Broadly, this paper contributes four things: a hardware design built entirely from cheap, easy-to-source parts; alert logic that reacts to both a manual button press and abnormal sensor readings; a two-channel notification setup (SMS plus email) that improves the odds of someone actually seeing the alert; and a round of bench testing that looks at how fast the system responds, how the GPS behaves on cold start, and how reliably the whole pipeline holds up.
Key Words: Internet of Things, Arduino Uno, GPS Tracking, GSM Communication, Tourist Safety, Emergency Alert System, SOS Button, Embedded Systems
1. INTRODUCTION Tourism brings in a huge share of jobs and revenue across the world, and every year more people head out to cities, hill towns, forests, and religious sites they have never visited before. That comes with a trade-off, though. Someone unfamiliar with a place is more exposed - to accidents, medical trouble, theft, harassment, or a natural disaster - and in a lot of these locations, the usual ways of calling for help just don't hold up [1]. Picture a tourist hurt on a forest trail or a pilgrimage path: they often can't describe where they are, and every extra minute before help arrives makes
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1.1 Problem Statement Most tourist-safety approaches today fall into one of three buckets: calling someone manually, using a smartphone app, or relying on a cloud/AI platform run
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