Enabled retained flag MQTT #86
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Retained messages help newly-subscribed clients get a status update immediately after they subscribe to a topic. The retained message eliminates the wait for the publishing clients to send the next update.
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True, but it also means that they may get stale data if MX is not currently running or updating MQTT for some reason. |
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As I've said on the forum... It depends on the type of application in which MQTT is used. In my case, using MQTT in a * application turns out to be convenient to have last available data immediately showed to client and eventually check the time of the last data received throught a script. Surely it could be implemented with a checkbox. |
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Hi, I have implemented the retained flag in the next release, but I have done it via the configuration settings and it is optional. |
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That's great! Thank you for the work. |
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Retained messages help newly-subscribed clients get a status update immediately after they subscribe to a topic. The retained message eliminates the wait for the publishing clients to send the next update.
More info:
https://www.hivemq.com/blog/mqtt-essentials-part-8-retained-messages/
Forum topic:
https://cumulus.hosiene.co.uk/viewtopic.php?f=36&t=18488