The Internet of Things (IoT) refers to the network of physical devices, sensors, and everyday objects embedded with computing capabilities and internet connectivity that let them collect, exchange, and act on data. Smart thermostats, wearable fitness trackers, industrial machinery, and agricultural sensors are all examples of IoT in action, extending digital intelligence into the physical world.
IoT architectures typically have four layers: the device layer (sensors and actuators), the connectivity layer (protocols like MQTT, Bluetooth, and LoRaWAN), the data processing layer (edge computing and cloud platforms), and the application layer (dashboards, automation rules, and analytics). Platforms such as AWS IoT Core, Azure IoT Hub, and Google Cloud IoT provide managed services that simplify device registration, data ingestion, and fleet management.
Developing for IoT comes with its own engineering challenges: power management for battery-operated devices, intermittent network connectivity, firmware updates across thousands of endpoints, and tight security requirements. With connected devices projected to surpass 30 billion worldwide, IoT continues to push growth in embedded systems, real-time data processing, and edge computing.