TRB140 MQTT: Difference between revisions

'''MQTT (MQ Telemetry Transport or Message Queue Telemetry Transport)''' is an ISO standard (ISO/IEC PRF 20922) publish-subscribe-based "lightweight" messaging protocol for use on top of the TCP/IP protocol. It is designed to send short messages from one client ('''publisher''') to another ('''subscriber''') through '''brokers''', which are responsible for message delivery to the end point. RUT routers support this functionality via an open source Mosquitto broker. The messages are sent this way: a client ('''subscriber''') subscribes to a topic(s); a publisher posts a message to that specific topic(s). The '''broker''' then checks who is subscribed to that particular topic(s) and transmits data from the publisher to the subscriber. This chapter is a summary of the MQTT function in RUT routers.