Hey all, I'm a new Node-Red user and have had some guidance from a friend to get me going. I'm running the latest v8 version of Node-Red, Mosquitto Eclipse MQTT, and Homeseer (for my Z-wave devices). I've searched the web and this forum and I can't seem to find (or perhaps understand) the help I'm…

Node-RED is on version 0.19.5 see https://nodered.org Mosquito is on v1.5.4 or v.1.5.5 How have you configured your MQTT-IN node? What is the QoS set as? (read the Info panel on the Right Hand Side)

Thanks for the reply, ukmoose. I'm running Node Red 0.19.5 (V8) and Mosquitto 1.5.5. The QoS of most of my MQTT-in's are 2 but I noticed a couple of them are 0. I'm seeing that QoS 0 delivers at most once, 1 delivers at least once, and 2 delivers only once. I don't recall setting them to QoS 2, …

There’s a great intro to MQTT here https://www.hivemq.com/blog/mqtt-essentials-part-1-introducing-mqtt/ which is well worth a read

Thanks for the link. I'll certainly read the MQTT essentials. In the meantime, any other suggestions or pointers as to what might be causing this issue are appreciated.

Hey Colin, I just edited the flows so that only the MQTT in for each flow was active and had a debug (deleted the wire going to the rest of the flow) and pared down 30 debug results to one debug result per flow (3) when I click Deploy. Debug is showing that a 0 (off) is being sent to each flow. I’m…

[image] Inshakoor: Debug is showing that a 0 (off) is being sent to each flow. The most likely reason is that the topic for each of those was last written to with value 0 with the Retain flag set. The retain flag tells mosquitto to remember the latest value for the topic and when a client co…

I decided to backup my flows and then kill them all. I only added an MQTT in and a debug and it still received 0. At my wit's end, I decided to turn everything off and then on again (so I thought): Node Red, Home Assistant, and HomeSeer. I still got a 0 in NR. Then (duh), it occurred to me to s…

It is possible that you had at some point written the value 0 with the retain flag set, but in the broker you had not enabled persistent memory. So all the time the broker was running it remembered it, but once you restarted it forgot again.

Multiple Flows "Execute" After I Deploy

General

Colin 13 January 2019 20:11 6

Nothing will happen unless something triggers a message. Look at the debug node on the MQTT In node and see what appears there when you deploy. It should send messages for any retained topics.

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Multiple Flows "Execute" After I Deploy

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