Mosquitto

Lightweight open-source MQTT message broker implementing MQTT 5.0, 3.1.1 and 3.1.

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Mosquitto is an open-source MQTT message broker that implements MQTT 5.0, 3.1.1 and 3.1 and includes client libraries, command-line tools, and an official test server. It provides a lightweight central broker for routing messages and managing connections on constrained hardware while supporting secure transports (TLS, WebSockets) and MQTT QoS, suited to IoT and embedded developers, home automation integrators, and industrial or automotive IoT teams.

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