Q.How are IoT and WoT related?

The Internet of Things — From Intuition to Definition

Imagine a world where your alarm clock talks to your coffee maker. The alarm knows your schedule, so when it rings, it silently tells the coffee maker to start brewing. By the time you reach the kitchen, your coffee is ready — no button pressed, no timer set. Your refrigerator notices you're out of milk and adds it to your shopping list. Your car, sensing traffic ahead, reroutes you before you even see the jam.

This is not science fiction. This is the Internet of Things.

The core intuition

The ordinary "Internet" connects people — you, me, websites, emails, social media. The Internet of Things (IoT) extends that same connectivity to physical objects: sensors, machines, appliances, vehicles, even clothing. These objects become "smart" because they can sense their environment, process that information, and act — often without human intervention.

Think of it as giving a voice and a brain to everyday things. A temperature sensor in a warehouse "speaks" to the central cooling system. A soil moisture sensor in a farm "tells" the irrigation pump when to water the crops. A wearable band on your wrist "talks" to your phone and your doctor's server.

The precise definition

Internet of Things (IoT) is a network of physical objects — each embedded with sensors, software, and connectivity — that collect and exchange data over the internet, enabling remote monitoring, control, and automation.

Break this down into four essential parts:

1. Physical objects — the "things" (a bulb, a car, a heart monitor)
2. Sensors/actuators — sensors detect (temperature, motion, light); actuators act (switch on a motor, lock a door)
3. Connectivity — the object sends data over the internet (via Wi-Fi, Bluetooth, cellular, or even satellite)
4. Data processing & action — the data is analysed (locally or in the cloud) and a decision is made

How it works — a simple flow

Consider a smart streetlight:

• A sensor detects that it is daytime and no vehicle is nearby.
• The microcontroller processes this input.
• The actuator (a relay) switches the light off.
• At night, when the sensor detects a car approaching, the light turns on automatically.
• The system may also report energy usage to a central server over the internet.

Why it matters for exams …