The general idea behind the (commonly accepted) vision of IoT consists in the extension of Internet protocols to Wireless Sensors Networks (WSNs), composed of sensors as well as actuators
Per approfondire le WSN
https://www.electronicshub.org/wireless-sensor-networks-wsn/
According to technologists and researchers, Wireless Sensor Networks as an entity is an important technology for the twenty first century. Recent developments in MEMS Sensors (Micro Electro Mechanical System) and Wireless Communication has enabled cheap, low power, tiny and smart sensors, which can be deployed in a wide area and can be interconnected through wireless links and internet for various civilian and military applications.
A Wireless Sensor Network consists of Sensor Nodes (we will see about this later) that are deployed in high density and often in large quantities and support sensing, data processing, embedded computing and connectivity.