Connecting End Clients Using the Lightweight Protocol CoAP over the Internet of Things

Abstract

Objectives: Communication between the clients over the internet poses the main challenge i.e., to build a secured network that keeps up with the demand, by simultaneously reducing the energy consumption. This communication can be achieved by installing certain add-ons in the client and server sides. Methods: In the existing methods, the communication between the end clients using CoAP protocol is a difficult task. In the proposed architecture, the main task is to achieve the communication between the end clients without gateways or intermediate proxies. In this method, the ports used for the HTTP (8000) and CoAP (5683) protocols are to be opened simultaneously for achieving communication. With the help of this protocol, the end clients can be connected over the internet. Findings: CoAP uses Universal Datagram Packets (UDP) since it uses its own DTLS security for the embedded devices. The system makes use of the Web IOPi and the txThings, a framework to communicate with the CoAP. Applications: In this work, txThings and WebIOPi are used in the Raspberry Pi and add-ons are installed along with the txThings and WebIOPi in the Web Browser using the command line interface. Since the Raspberry Pi used which is embedded device, the energy is saved. The implemented system can be used in diverse real time applications. The implementation is done in the frontend so that it can be controlled over the internet with the help of the CoAP protocol.