MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol designed for use in IoT (Internet of Things) and other machine-to-machine (M2M) communication scenarios.
IT uses a binary protocol that is designed to minimize the amount of data transmitted over the network. It supports three levels of quality of service (QoS), which determine the level of reliability of message delivery. QoS level 0 provides the lowest level of reliability, while QoS level 2 provides the highest level of reliability.
It is often used in scenarios where network bandwidth is limited, such as in IoT devices with low power and processing capabilities. It is also popular in applications that require real-time communication, such as in home automation systems, remote sensing, and telemetry.