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MQTT Broker: Difference between revisions
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Messages are just strings of text like "hello world" or "12.3". | Messages are just strings of text like "hello world" or "12.3". | ||
Messages are sent to arbitrary topics like <code> | Messages are sent to arbitrary topics like <code>pets/dogs/charlie</code>. By convention slashes separate levels of category that we all agree on. | ||
When a message is sent to a topic, all devices that are subscribed to that topic receive the message. | When a message is sent to a topic, all devices that are subscribed to that topic receive the message. | ||
Topics aren't really created, they just exist as soon as a message is sent to them. | Topics aren't really created, they just exist as soon as a message is sent to them. | ||
Normally messages aren't stored anywhere. They just get sent out and received by whoever happens to be listening to the same topic. However, we automatically log messages to the <code>sensors/</code> topics using [https://github.com/influxdata/telegraf/tree/master/plugins/inputs/mqtt_consumer Telegraf] + [https://github.com/influxdata/influxdb#influxdb- InfluxDB]. | |||
===Access=== | ===Access=== | ||
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====Reading==== | ====Reading==== | ||
Anyone can read any topic. Don't send anything private | Anyone can read any topic. Don't send anything private to the broker. | ||
*username: reader | *username: reader | ||
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The MQTT Broker is hosted on the [[Webhost VPS]] managed by Tanner. The same one that's running the main [[Website]] and the [[Wiki]]. | The MQTT Broker is hosted on the [[Webhost VPS]] managed by Tanner. The same one that's running the main [[Website]] and the [[Wiki]]. | ||
=== References === | ===References=== | ||
<references /> | <references /> | ||