USAGE OF NGINX and websocket in IoT

The use of standard HTTP protocol, within complex systems, may lead to system-wide high latency. The increased number of periodically sent request containing information for updating a client´s state on the server can cause a system choke. Websocket protocol acts as an upgrade to the HTTP protocol and functions in a two-way duplex regime, thus the number of request is greatly reduced when compared to standard HTTP. This paper evaluates and measures the performance of a client-server configuration that meets the modern security requirements, whilst providing two-way communication and scalability regarding the number of client and server instances.