MQTT (Message Queuing Telemetry Transport) is a lightweight, publish-subscribe messaging protocol that is designed for use in low-bandwidth, high-latency or unreliable network environments. It was invented by Dr. Andy Stanford-Clark of IBM and Arlen Nipper of Eurotech in 1999.
The MQTT protocol is designed to enable efficient and reliable communication between devices, even in networks with limited resources. It uses a client-server architecture where MQTT clients connect to an MQTT broker, which acts as a message hub. The clients can then subscribe to one or more topics on the broker, or publish messages to one or more topics.
The publish-subscribe model means that the sender of a message (the publisher) does not need to know the specific receivers (subscribers) of the message. Instead, the publisher simply publishes the message to a topic, and any subscribed clients that are interested in that topic receive the message.
MQTT messages are lightweight, meaning they contain minimal overhead and can be transmitted efficiently over networks with limited bandwidth or high latency. They can also be sent with varying levels of Quality of Service (QoS) to ensure reliable delivery, even in unstable network conditions.
Overall, MQTT is a versatile and efficient messaging protocol that is well-suited for IoT (Internet of Things) and other applications where reliable communication is essential, even in networks with limited resources.