I have a function node that is receiving input from several nodes, each of which transmits on its own topic. The function checks if any of the payloads are true and then outputs true. Unfortunately it's also passing through all of those input messages. How can I block those? Is there a way to send …

You can use a function like: const incoming_mac = msg.payload.flat().map(x=>x.mac) const people = { "presence/Phone1": "12:74:67:94:37:36", "presence/Phone2": "64:c2:f9:91:2b:36", "presence/Phone3": "19:0e:59:18:66:a0", "presence/Phone4": "d9:46:07:f8:42:e8", "presence/Phone5":…

In that case don't split it, keep it together.

[image] daxliniere: You've made an assumption that the data arrives asynchronously. :slight_smile: It's actually from a Unifi node which is queried whenever a door is opened, so the data does come all at once. Looking at this snippet of code: if ( (msg.payload == false)&&(msg.topic="phon…

You seem to be assigning 5 different values to msg.topic, one after another. Why? My thought was that it would check for 'false' on the topic 'phone 1' and 'false' on the topic 'phone 2', etc. Though I am good with logic, I'm absolutely not a programmer.

[image] daxliniere: My thought was that it would check for 'false' on the topic 'phone 1' and 'false' on the topic 'phone 2', etc. OK. This is not the way Node-red (and other flow based programming languages that I know of) works. It's not easy to give a simple and clear explanation but you …

But perhaps there is a completely different way to do this. I already have a function node which checks the MAC addresses which are reported by the Unifi node: Argh! While writing this, my (remote) raspberry pi just went down and I can't access my flows. I'll have to paste the code Monday or hopef…

The RPi rebooted, I'm back in. This is the function node that is fed from the Unifi node and has multiple outputs: const lastSeenSeconds = 20; let presenceCutoff = (Date.now() - (lastSeenSeconds * 1000)) / 1000; const people = { "presence/Phone1" : "xx:xx:xx:xx:xx:xx", "presence/Phone2"…

OK - Lets do this methodically. Can you post the EXACT payload you're receiving (please format it) - redact/replace where necessary. What payload output you want as a result of this input payload. I think this will help in trying to solution your quest I still think its important to understan…

Thanks Marcus, I could do that, but a single 'packet' from the Unifi node is 13.5kb, so it'll take me a while to redact. Is it not obvious to see the pertinent details in here?: How to drop msg.payload from specific topics? - #16 by daxliniere I am currently getting the required information from t…

[image] daxliniere: Is it not obvious to see the pertinent details in here? Not to me it isn't. I'd need someone to explain line by line what that code is doing. In fact "Explain this code" is a very powerful tool in tech support. When you have to explain it you are more likely to understan…

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How to drop msg.payload from specific topics?

General

daxliniere 23 June 2024 13:05 17

I was hoping to turn it into something like this, but I'm pretty lost to be honest:

Topic		Replies	Views
Topic filter and block General	8	299	23 October 2023
Merge different messages with same TOPIC General	25	2066	12 March 2022
If function returns duplicate msg General function-node	11	452	16 July 2022
Filter incoming data based on payload General	5	11506	9 January 2019
Logical And Function General	65	1895	6 February 2023

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How to drop msg.payload from specific topics?

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