Performance Evaluation of IoT Application Protocols for Smart Agriculture In Smart Agriculture system, Multiple Internet of Things (IoT) protocols are used for data transmission. Protocols are such as DDS, MQTTSN, SMQTT, CoAP. DDS is an abbreviation for Data Distribution Service. OMG created this IoT protocol for M2M (Machine to Machine) communication (Object Management Group). It provides data interchange via the publish-subscribe model. Unlike the MQTT and CoAP protocols, DDS has a brokerless architecture. Whereas, CoAP is a common client-server IoT protocol. It enables clients to make online transfer requests based on the requirement of the hour. However, it also allows supporting servers to reply to incoming queries. To summarize, devices' nodes in the IoT ecosystem can only communicate via CoAP.
Another protocol, SMQTT - Secure Message Queue Telemetry Transport - is more secured MQTT protocol.The MQTT protocol is the de-facto standard for IoT messaging. Standardized by OASIS and ISO, MQTT publish/subscribe protocol provides a scalable and reliable way to connect devices over the Internet. Today, MQTT is used by many companies to connect millions of devices to the Internet. Related to MQTT protocol is MQTT-SN. MQTT-SN (MQTT for sensor networks) is an optimized version of the MQTT (Message Queuing Telemetry Transport) IoT communications protocol built primarily for efficient operation in massive low-power IoT sensor networks.
In comparison with default internet protocol, HTTP - in terms of file size, if we increase the the volume, then CoAP and DDS stood out from the rest where CoAP performed better.
Whereas, If we increase the client size - then, MQTT-SN, CoAP, SMQTT performed better.
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