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The Internet of Things (IoT) is a concept that connects everyday objects to the Internet, making them smart and allowing them to communicate with us and with each other. One important aspect of IoT is the use of sensors.
What are sensors?
How IoT sensors connect and communicate
Imagine if you wanted to know everything that was happening around you without even being there. That’s what sensors do — they are like little detectives that can sense and collect information about the world.
Sensors are small devices with unique abilities to detect things like temperature, light, movement, or even how close objects are to them. They have tiny electronic eyes, ears, and noses that help them perceive the world just like we do, but using their own special technology.
When connected to the internet, these sensors become part of the IoT network. They can send the information they collect to other devices, like computers or smartphones, giving us all sorts of valuable data without us needing to be anywhere near the sensor.
How does it work in everyday life?
Let’s say we have a smart home with IoT sensors. These sensors can tell us if a room is too hot or cold, so we can adjust the temperature to be just right. They can also detect if someone enters or leaves a room so that lights turn on or off automatically.
But IoT isn’t just limited to homes. It can be used in many areas:
Smart Homes
Sensors monitor temperature, detect movement, and control lights and appliances automatically.
Smart Cities
Sensors monitor traffic flow, help drivers find parking spaces, and manage street lighting.
Factories
Sensors check if machines are working correctly, preventing problems before they happen.
Nature & Environment
Sensors monitor weather, air quality, soil conditions, and wildlife habitats.
Schools
Sensors in classrooms monitor CO₂, temperature, humidity and light to improve learning environments.
In a nutshell, IoT is all about connecting objects and sensors to the internet so they can share information and make our lives easier and more efficient. It’s like giving things the power to talk to each other and to us — making the world a smarter place!
Watch a short BBC News explanation of how the Internet of Things works in the real world.
Watch on BBC News →Published 15 July 2025 | Contact us