IoT hardware is limited in terms of available resources and uses lightweight application layer protocols for communication. Some of the popular choices include MQTT or XMPP. Michał Podwórny takes a look at something quite different: Constrained Application Protocol (CoAP).

http://codetunes.com/2016/iot-with-elixir-and-coap-part-1-example-on-how-to-easily-prototype-and-build-an-iot-platform/