MQTT
Message Queuing Telemetry Transport — Lightweight messaging protocol for industrial IoT and IIoT.
MQTT is a communication protocol based on the publisher/subscriber model, designed for connections with low bandwidth and high latency. It is essential in modern IIoT (Industrial Internet of Things) architectures.
Its main features are: extremely lightweight, supports quality of service (QoS 0, 1, 2), message retention and last will (LWT). It is ideal for connecting sensors, PLCs and SCADA systems with cloud platforms.