Feature Request: Add Disconnected Topic about octoprint-mqtt HOT 2 CLOSED

I just realized that I read this wrong and you are actually talking about the printer connection here, not the MQTT connection. Well, 0.7 will have LWT support anyhow ;)

However what you are asking for here should actually already work and in my test also does, see the highlighted message here:

The events aren't retained though (that wouldn't make a lot of sense considering that events are not a status), so you must be connected to the broker and subscribed to those messages to actually receive them. Also note that the list of events in the README isn't exhaustive, for a full list of all available events consult OctoPrint's docs.

I honestly don't want to mirror each and every status available on the REST API, if you need that kind of control I suggest to use that API instead, or alternatively implement another plugin utilizing the helper functions provided by this one.

from octoprint-mqtt.

The MQTT way of doing this is to set a "last will and testament" (LWT) message with the broker. The broker then publishes the message as specified when the broker detects the client is no longer connected.

Random google link: https://www.hivemq.com/blog/mqtt-essentials-part-9-last-will-and-testament

This is actually mentioned in the readme as a TODO.

from octoprint-mqtt.