MQTT

MQTT (Message Queuing 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. MQTT (Message Queuing 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. Andy Stanford-Clark of IBM and Arlen Nipper of Cirrus Link authored the first version of the protocol in 1999. In 2013, IBM submitted MQTT v3.1 to the OASIS specification body with a charter that ensured only minor changes to the specification could be accepted. MQTT-SN is a variation of the main protocol aimed at embedded devices on non-TCP/IP networks, such as Zigbee. Historically, the 'MQ' in 'MQTT' came from the IBM MQ (then 'MQSeries') message queuing product line. However, queuing itself is not required to be supported as a standard feature in all situations. Alternative message-oriented middleware includes the Advanced Message Queuing Protocol (AMQP), Streaming Text Oriented Messaging Protocol (STOMP), the IETF Constrained Application Protocol, XMPP, DDS, OPC UA, and Web Application Messaging Protocol (WAMP).