Abstract
An increase in the internet speed and bandwidth has enabled researchers to go beyond Machine-to-Machine(M2M) communication to the Internet of Things(IoT). IoT has now found its application in healthcare, agriculture, industry, the military, and many more. With the expansion in the number of IoT devices, these applications can be enhanced much more. However, with an increase in the number of IoT devices, the data from these devices also increases, and a proper data protocol is required to achieve smooth communication between devices. Typical HTTP or HTTPS is not enough for the data transmission in IoT. This paper compares different IoT data protocols - MQTT, AMQP, CoAP, XMPP; also, it is compared with the standard method of sending data, i.e., Websockets and DDS. Packet creation time, Transmission time, and Packet size are taken as the performance matrices for comparison of these protocols. This comparison helps the user conclude which protocol is best for the application of smart home or home automation.
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