Monitoring via MQTT

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Summary

MQTT (MQ Telemetry Transport or Message Queue Telemetry Transport) is an ISO standard (ISO/IEC PRF 20922) publish-subscribe-based messaging protocol. It works on top of the TCP/IP protocol. It is designed for connections with remote locations where a "small code footprint" is required or the network bandwidth is limited. The publish-subscribe messaging pattern requires a message broker. This chapter is a guide on how to configure a basic MQTT setup on RUT routers.

How MQTT works

First lets look over how MQTT works on RUT routers. An MQTT connection takes place between two Clients and a Broker. A RUT router can be Broker, a Client or both. The MQTT Publisher (Client) present in RUT routers subscribes to two topics by default: router/get and get/<SERIAL>/command, where <SERIAL> is the router's serial number. A third party


Field name	Value	Description
Enable	yes \| no; Default: no	Toggles MQTT Broker ON or OFF
Local Port	integer [0..65535]; Default: " "	Specifies the local port that the MQTT broker will listen to
Enable Remote Access	yes \| no; Default: no	If enabled, MQTT Broker will be reachable by remote user (from WAN)