Architecture:Protocols:MQTT: Difference between revisions

Latest revision as of 23:06, 7 April 2026

Part of Architecture:Protocols:Main_Page

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MQTT (Message Queuing Telemetry Transport)

MQTT stands for Message Queuing Telemetry Transport. It is a lightweight messaging protocol designed for low-bandwidth, high-latency, or unreliable networks, and is often used in Internet of Things (IoT) applications. It allows devices to communicate efficiently.

How MQTT Works

MQTT uses a publish/subscribe model, unlike traditional request/response networking. There is a central broker (server) that routes messages between devices:

Publishers: devices that send messages on a topic.
Subscribers: devices that receive messages from topics they are interested in.
Broker: manages message delivery, ensuring subscribers get messages they have subscribed to.

Key Features

Lightweight: Minimal overhead, ideal for small sensors and embedded devices.
Efficient: Designed for low network bandwidth.
Reliable: Supports different levels of message delivery:
- QoS 0: At most once (fire-and-forget)
- QoS 1: At least once (may duplicate)
- QoS 2: Exactly once (guaranteed delivery)

Typical Use Cases

Smart home devices (lights, thermostats)
Industrial sensors and machinery
Vehicle telemetry
Remote monitoring systems

Ports and Transport

MQTT usually runs over TCP, default port 1883.
MQTT over TLS/SSL uses port 8883 for secure communication.

Summary

In simple terms, MQTT is like a tiny, super-efficient postal service for devices, letting them send and receive messages without overwhelming the network.

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-= MQTT =
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-MQTT is a lightweight, publish–subscribe messaging protocol designed for devices that need to communicate efficiently over unreliable or low‑bandwidth networks. It has become one of the core standards of the Internet of Things (IoT).
+== MQTT (Message Queuing Telemetry Transport) ==
+'''MQTT''' stands for ''Message Queuing Telemetry Transport''. It is a lightweight messaging protocol designed for low-bandwidth, high-latency, or unreliable networks, and is often used in [[Internet of Things]] (IoT) applications. It allows devices to communicate efficiently.
+== How MQTT Works ==
+MQTT uses a '''publish/subscribe model''', unlike traditional request/response networking. There is a central '''broker''' (server) that routes messages between devices:
+* '''Publishers''': devices that send messages on a topic.
+* '''Subscribers''': devices that receive messages from topics they are interested in.
+* '''Broker''': manages message delivery, ensuring subscribers get messages they have subscribed to.
+== Key Features ==
+* '''Lightweight''': Minimal overhead, ideal for small sensors and embedded devices.
+* '''Efficient''': Designed for low network bandwidth.
+* '''Reliable''': Supports different levels of message delivery:
+** QoS 0: At most once (fire-and-forget)
+** QoS 1: At least once (may duplicate)
+** QoS 2: Exactly once (guaranteed delivery)
+== Typical Use Cases ==
+* Smart home devices (lights, thermostats)
+* Industrial sensors and machinery
+* Vehicle telemetry
+* Remote monitoring systems
+== Ports and Transport ==
+* MQTT usually runs over TCP, default port 1883.
+* MQTT over TLS/SSL uses port 8883 for secure communication.
+== Summary ==
+In simple terms, MQTT is like a tiny, super-efficient postal service for devices, letting them send and receive messages without overwhelming the network.