IoT as the use of network-connected devices, embedded in the physical environment, to improve some existing process or to enable a new scenario not previously possible.
These devices, or things, connect to the network to provide information they gather from the environment through sensors, or to allow other systems to reach out and act on the world through actuators.
Devices, Gateways and Clouds
A device includes hardware and software that directly interact with the world. Devices connect to a network to communicate with each other, or to centralized applications. These are the Sensors/
A gateway enables devices that are not directly connected to the Internet to reach cloud services. Although the term gateway has a specific function in networking, it is also used to describe a class of device that processes data on behalf of a group or cluster of devices. The data from each device is sent to Cloud Platform, where it is processed and combined with data from other devices, and potentially with other business-transactional data. Gateways aggregate the data from sensors and feed it to the cloud.
Telemetry
Data collected by the device is called telemetry. This is the eyes-and-ears data that IoT devices provide to applications. Telemetry is read-only data about the environment, usually collected through sensors.
Commands
Commands are actions performed by a device. like turning on a light, taking a photo, providing an audible or visual indicator. or operate a mechanical actuator.
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