Hi all I am using ESPs and pubsubclient to publish to and subscribe from node-red MQTT. I have a fairly extensive device network now running that listens for the published heartbeat and then responds by publishing local sensor data as a consequence of the callback. These devices save their config…

Honestly - no MQTT broker is installed as part of the default installation - are you running docker or something? [image] skybadger: "MQTT broker. Because this MQTT broker is implemented by Node.js, you can use MQTT-in and MQTT-out nodes without an external broker like Mosquitto." Where are …

Not at all running docker or any containerisation - the quote is taken from the dashboard node : node-red-contrib-mqtt-broker which is mosca v0.2.5. I see that it needs to be replaced with Aedes but that slightly beside the point. The quote is taken from the node description field. Node-red is vers…

Could you provide link to url please? :slight_smile: FYI That is a quite an old version of Node-RED - when did you install it?

[image] skybadger: Aedes I think that does not support retained messages. Use mosquitto instead.

If I do that do I also need to find a different set of dashboard nodes to publish and subscribe ?

@skybadger Just to clarify - although the problem is quite likely to be that you are using the deprecated mosca broker provided by the contrib node node-red-contrib-broker, and that broker doesn't support retained messages as @colin has said (without a lot of other things being installed/configured)…

[image] skybadger: If I do that do I also need to find a different set of dashboard nodes No you do not.

I'm thinking that what @skybadger is calling "dashboard nodes" isn't what we call a dashboard ?

Th worst case would be that I have installed it from the node-red catalogue using the node-red-contrib-mqtt-broker node set. The broker installed is mosca, which is compliant with node.js up to current versions but seemingly recently not well supported, hence the recommendation to move to Aedes. I'd…

@cymplecy I agree, I think I am mis-labelling it here when I call them dashboard-nodes - I mean palette nodes.

Using MQTT retained messages to store state between reboots

General

skybadger 25 May 2021 21:28 18

Is the recommendation then to use Mosquito as a stand-alone broker rather than Aedes as a hosted node.js broker ? Is there a guide to setting up a quality MQTT broker to interact with from node-red and third-party IOT devices ?

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Using MQTT retained messages to store state between reboots

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