Hello everyone, The other day I was looking for a simple round-robin node that could forward the received messages to different destinations based on a simple counter. An example usage of this could be (in a smarthome context) a button, which on first press turns on the light, then dims it, then fo…

[image] Semmu: const previous = (typeof context.get('localCounter') === 'undefined' ? -1 : context.get('localCounter')); Just a note that this can be simplified using the snappily named ' Nullish coalescing operator (??)' const previous = context.get('localCounter') ?? -1

If you are using MQTT you can also achieve this for free using shared topics. [image] Redundant node-red instances plugged on AWS IOT CORE General In pretty sure you can use mqtt shared subscriptions anywhere with v5 mqtt broker. Just give it a go. Node-red 1 Subscribe …

Hey @Colin thanks for the suggestion, I forgot about that operator! Makes it simpler indeed. @Steve-Mcl thanks for this link, I didn't know about this MQTT feature! But I also want to keep all my logic within NR itself, and I need this router for non-MQTT related stuff too, so that's why I chose to…

Glad you found a low-code solution! In the spirit of providing another (essentially) no-code way to route messages via a counter, I have also used this technique based on a switch node: [image] Of course, it doesn't provide the nice status message, but it's useful when you just need to send a mes…

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Super simple round-robin router implemented in a function node

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Steve-Mcl 24 July 2024 20:26 3

If you are using MQTT you can also achieve this for free using shared topics.

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Super simple round-robin router implemented in a function node

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