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The most simple definition is a network of devices that have an IP address and can communicate with each other over the internet.
To understand the Internet of Things (IoT), we need to understand 4 things:
A network is a group of computers or other devices connected via cables, telephone lines, radio waves, or satellites and generally involves all devices to "speak" to each other using a standard, defined protocol.
An IP address is a unique string of numbers separated by periods that identifies each computer using the Internet Protocol to communicate over a network. This gives computers on a network a "name" or identity that will not be duplicated by any other computer.
The internet is a global network of public IP addresses that allows computers all over the world to have unique identities and names.
Wait!
but what protocol should we use?
WebSocket is the only transport that allows bidirectional communication over the same connection. As a result, WebSocket provides low latency delivery of text and binary application data in both directions.