A CoAP-Based Hypermedia Framework for Always-On and Sleepy Devices in Smart Home Environment

Lack of commonly accepted standards for the connected devices’ APIs caused the situation when each manufacturer or Smart Home enthusiast creates its own mobile application to control their devices. The authors propose a lightweight framework to the design of self-descriptive API on top of CoAP protocol using Hydra Core, Schema.org and Semantic Sensor Network vocabularies which allow to create a mobile application with an adaptive user interface to interact with any type of device. In this paper the authors enumerate the requirements, describe the framework, evaluate it on three exemplified devices built using ESP8266 Wi-Fi module and describe the architecture of the mobile application for interacting with such devices. KEywORDS Constrained Devices, Hypermedia API, Resource Directory, Sleepy Devices, Smart Home

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