MQTT: Difference between revisions

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MQTT is a ''really'' simple protocol that connected devices can use to publish and receive messages. Messages have a topic and may contain an arbitrary payload. Devices never talk to each other directly. A MQTT brokers receives published messages and distributes them to subscribers by matching message topics with subscribed-to topics.
MQTT is a ''really'' simple protocol that connected devices can use to publish and receive messages. Messages have a topic and may contain an arbitrary payload. Devices never talk to each other directly. A MQTT brokers receives published messages and distributes them to subscribers by matching message topics with subscribed-to topics.


* [[MQTT FSM|Handshaking]] - a FSM (Finite State Machine) of the protocol
* [[MQTT FSM|Handshaking]] - a FSM (Finite State Machine) of the protocol at QoS 0, 1, 2
* most simple application (QoS 0)
* [[MQTT Encoding and Decoding]]
* encoding and decoding
* Limits of the Arduino environment (like, conversational state)
* more sophistication (QoS 1, 2), limits of the Arduino environment (like, conversational state)
 


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Revision as of 15:29, 3 July 2017

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MQTT - A Protocol for Connecting IoT Devices

MQTT is a really simple protocol that connected devices can use to publish and receive messages. Messages have a topic and may contain an arbitrary payload. Devices never talk to each other directly. A MQTT brokers receives published messages and distributes them to subscribers by matching message topics with subscribed-to topics.

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