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Getting Started with IoT

 IoT Beginner Guide

Getting Started with IoT

From a blinking LED to a connected smart system — a beginner's guide for engineering students.

The Internet of Things (IoT) is one of the most accessible areas for students to start building real projects. If you've seen our Smart Light project using ESP32, this guide shows you the bigger picture and how to level up.


The 3 Layers of Every IoT System

Layer 1 — Sensing

Sensors collect real-world data: temperature, motion, light, humidity, gas levels. The physical world enters your system here.

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Layer 2 — Processing

A microcontroller (Arduino, ESP32, Raspberry Pi) reads the sensor data and decides what action to take based on your code logic.

Layer 3 — Actuation / Communication

The system triggers a physical action (relay, motor, buzzer) or sends data to the cloud, a mobile app, or a dashboard.

Beginner Kit Under ₹1,500

ESP32 Board

₹350–450

Better than Arduino for IoT — has built-in Wi-Fi and Bluetooth

DHT11 / DHT22

₹80

Measures temperature and humidity — perfect first sensor project

PIR Motion Sensor

₹80

Detects movement — used in the Thirai Smart Light project

Relay Module

₹80

Controls AC appliances safely from your microcontroller

Wires + Breadboard

₹150

Jumper wires, breadboard, USB cable — essential for prototyping

Smart Light Code (ESP32)

// smart_light.ino — Thirai Project
#define PIR   14
#define RELAY 26

void setup() {
  pinMode(PIR, INPUT);
  pinMode(RELAY, OUTPUT);
}

void loop() {
  int motion = digitalRead(PIR);
  digitalWrite(RELAY, motion); // ON when motion detected
}

8-Week Learning Roadmap

Week 1–2

LED blink, button input, serial monitor output — get familiar with the Arduino IDE and ESP32 board

Week 3–4

Temperature & humidity sensor display, relay control — read data and trigger physical output

Week 5–6

Connect to Wi-Fi, send sensor data to the cloud using ThingSpeak or Blynk — your first connected device

Week 7–8

Build a complete project: smart home automation, weather station, or smart attendance system

 More project guides on Thirai

Check the Technology section for more Arduino and IoT tutorials for Indian engineering students.