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22 lines
1.3 KiB
Markdown
22 lines
1.3 KiB
Markdown
# Broker
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The broker will act as an intermediary between OpenMQTTGateway and your [controller](/prerequisites/controller), it can be seen as a centralized hub at the heart of your automation system. It carry on messages following a publish / subscribe mechanism.
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All the events or commands could pass by the broker.
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There are many choices of brokers, here are some of the most popular:
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* [Mosquitto](https://mosquitto.org/) (Open source)
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* [Moquette](https://moquette-io.github.io/moquette/) (Open source)
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* [EMQX](https://www.emqx.io/) (Open Source)
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* [HiveMQ](https://www.hivemq.com/hivemq/features/)
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* Embedded MQTT brokers (Home Assistant and OpenHAB)
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This [wikipedia list](https://en.wikipedia.org/wiki/Comparison_of_MQTT_implementations) gives you more details about the different choices you have.
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This [github list](https://github.com/mqtt/mqtt.github.io/wiki/libraries) seems to be the most exhaustive ones.
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Here is also some [ideas of criteria](https://www.hivemq.com/blog/top-10-mqtt-broker-criteria/) from HiveMQ.
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Once your broker is installed it can be interesting to see the traffic passing to it and to publish data, so as to do that there are several tools available:
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* [MQTT Explorer](http://mqtt-explorer.com/)
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* [HIVE MQ Web client](https://github.com/hivemq/hivemq-mqtt-web-client)
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* [MQTT FX](https://mqttfx.jensd.de/)
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