Hello, I'm quite confident programmer, but as well quite new to node-red so I can solve my issue in other programming languages, but in nodered i need bit of help. I have let's say two different MQTT topics, which I need to have synced when CMND is received (they are 2way switches with tasmota - i…

does the device send anything when it receives a CMND? I would put a debug on both of the mqtt-in nodes and to the leg of the switch nodes going to the mqtt-out nodes. You might want to look at the QOS and retain options on the mqtt-out nodes.

when cmnd is received devices broadcast /state/POWER which should be ignored by node-red not really sure if qos would help, as rapid switching means both switches receiving commands for sure :wink:

You could add an RBE or similar node to effectively debounce the signals?

Should it be fully symetrical? So if either one goes off or on then the other should follow it? If so then you might like to try this flow which is rather simpler and does not use the context so maybe is less likely to suffer from subtle edge case timing issues. [image] The inject buttons allow …

Yes, it takes some playing with some of the core nodes to get the hang of them. However, the flows site (link at the top of the forum) will help. [image] node-red-node-rbe A Node-RED node that provides report-by-exception (RBE) and deadband capability. There ar…

yes, it have to be fully symetrical. Will try this one, thanks! [image] TotallyInformation: Yes, it takes some playing with some of the core nodes to get the hang of them. yeah, I still indeed find my programming languages more friendly as I clearly can see what my code is doing, nodered is…

[image] krizniq: I still indeed find my programming languages more friendly as I clearly can see what my code is doing, nodered is bit different approach, but for applications like this I really like it. Like anything else, Node-RED is a tool. You don't reach for a hammer when you need to uns…

[image] krizniq: Will try this one, thanks! Just a thought, in order that it works immediately on node-red restart the two stat topics should be Retained topics in MQTT.

all my switches are retaining their states, so it should. will report back when in production :wink: edit: it works indeed, let's see if there will be some weird rapid switching after some time of using this

Node-RED

Node-RED Forum

Mqtt monitoring / syncing states, need bit of help

General

krizniq 24 October 2019 20:18 5

that's why I'm here asking for hand ...

not really familiar with all nodered nodes yet

Topic		Replies	Views
Repost State of Mqtt Topic if other Topic's state is 1 General	21	1361	11 April 2020
How to send an initial MQTT message to get the status of a tasmota switch? General	49	5441	6 December 2021
Two way switch infinite loop General function-node , mqtt	23	1379	3 September 2022
Problem with MQTT and switch update General	27	5465	26 November 2020
MQTT is driving me crazy with inconsistent doings General	77	2653	29 July 2020

Copyright OpenJS Foundation and Node-RED contributors. All rights reserved. The OpenJS Foundation has registered trademarks and uses trademarks. For a list of trademarks of the OpenJS Foundation, please see our Trademark Policy and Trademark List. Trademarks and logos not indicated on the list of OpenJS Foundation trademarks are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.

Mqtt monitoring / syncing states, need bit of help

Related topics