# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=480

[Latest](https://discourse.nodered.org/latest.md) · [Categories](https://discourse.nodered.org/categories.md) · [Tags](https://discourse.nodered.org/tags.md)

**Page:** 481

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## [Changing Light RGB Color using a variable](https://discourse.nodered.org/t/changing-light-rgb-color-using-a-variable/52522)

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**Author:** [@PapaZ](https://discourse.nodered.org/u/PapaZ)\
**Replies:** 6\
**Last updated:** [21 October 2021 20:44 UTC](https://discourse.nodered.org/t/changing-light-rgb-color-using-a-variable/52522 "2021-10-21T20:44:21Z")

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Hello everyone, I'm new to Node-RED but I've played around with programming for a while. What I'm looking to do seems easy but I can't figure out how to make it work. I query a Weather site to get Weather information. I'…

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## [Web scrape and validation](https://discourse.nodered.org/t/web-scrape-and-validation/52519)

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**Author:** [@Marty1982](https://discourse.nodered.org/u/Marty1982)\
**Replies:** 15\
**Last updated:** [21 October 2021 20:34 UTC](https://discourse.nodered.org/t/web-scrape-and-validation/52519 "2021-10-21T20:34:45Z")

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Hi all !. A few months back i was working on a project were i scrap some part of this web site: Tasmota ESP8266 Binaries specially on the "version" element. Then, I validate the Tasmota version via http API and finally…

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## [Node Red security password](https://discourse.nodered.org/t/node-red-security-password/10774)

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**Author:** [@raghavendraawad](https://discourse.nodered.org/u/raghavendraawad)\
**Replies:** 29\
**Last updated:** [21 October 2021 18:21 UTC](https://discourse.nodered.org/t/node-red-security-password/10774 "2021-10-21T18:21:25Z")

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Hello, I have securely created Username/password based authentication from Node red documentation. I am a beginner in node red same like this in settings.js file adminAuth: { type: "credentials", users: \[{ usernam…

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## [Use Bluetooth to scan for devices as a presence detector?](https://discourse.nodered.org/t/use-bluetooth-to-scan-for-devices-as-a-presence-detector/52379)

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**Author:** [@WhiteLion](https://discourse.nodered.org/u/WhiteLion)\
**Replies:** 24\
**Last updated:** [21 October 2021 17:12 UTC](https://discourse.nodered.org/t/use-bluetooth-to-scan-for-devices-as-a-presence-detector/52379 "2021-10-21T17:12:22Z")

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Hiho, currently I am scanning the MAC addresses of my WiFi for devices (mobile phone) as a presence detection. This does not work fast enough and I wanted to try the kind of same thing with the Bluetooth scan. I ve NR …

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## [Nodered Smartmeter Node "half installed"](https://discourse.nodered.org/t/nodered-smartmeter-node-half-installed/52513)

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**Author:** [@mode](https://discourse.nodered.org/u/mode)\
**Replies:** 6\
**Last updated:** [21 October 2021 15:17 UTC](https://discourse.nodered.org/t/nodered-smartmeter-node-half-installed/52513 "2021-10-21T15:17:38Z")

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Hi, i was using the NodeRed 1.3.2 with the "node-red-contrib-smartmeter" Node but after updating my system (npm and node) my flows can not found the node-red-contrib-smartmeter node. In the webinterface it is shown as i…

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## [How to store data in back4app parse server?](https://discourse.nodered.org/t/how-to-store-data-in-back4app-parse-server/52351)

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**Author:** [@azha1983](https://discourse.nodered.org/u/azha1983)\
**Replies:** 1\
**Last updated:** [21 October 2021 13:03 UTC](https://discourse.nodered.org/t/how-to-store-data-in-back4app-parse-server/52351 "2021-10-21T13:03:48Z")

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hi, I'm having ready react native mobile application which is the the backend database is using back4app parse server. Currently i want to integrate my iot device that i develop using node-red into the same backend data…

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## [Integrating Node-RED with the Helium Network](https://discourse.nodered.org/t/integrating-node-red-with-the-helium-network/52504)

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**Author:** [@vongomben](https://discourse.nodered.org/u/vongomben)\
**Replies:** 1\
**Last updated:** [21 October 2021 11:34 UTC](https://discourse.nodered.org/t/integrating-node-red-with-the-helium-network/52504 "2021-10-21T11:34:49Z")

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Hi. I am witnessing a huge enthusiasm in the spread of Helium. Their coverage is increasing, and I've started studying the whole process. I've noticed in their Ecosystem section some tools / integrations that allow us…

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## [Can I use Firebase Javascript SDK inside Node-red flows?](https://discourse.nodered.org/t/can-i-use-firebase-javascript-sdk-inside-node-red-flows/52378)

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**Author:** [@Sulomus](https://discourse.nodered.org/u/Sulomus)\
**Replies:** 8\
**Last updated:** [21 October 2021 11:19 UTC](https://discourse.nodered.org/t/can-i-use-firebase-javascript-sdk-inside-node-red-flows/52378 "2021-10-21T11:19:09Z")

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Hi, I am completely new in Node-red and would be grateful for some guidance. As I understand Node-red runs on NODE.js. I want to use Firebase Javascript SDK's in flows. In their docs it is specified that I can …

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## [Citing Node-RED in a scientific publication](https://discourse.nodered.org/t/citing-node-red-in-a-scientific-publication/52412)

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**Author:** [@FiloCara](https://discourse.nodered.org/u/FiloCara)\
**Replies:** 5\
**Last updated:** [21 October 2021 11:06 UTC](https://discourse.nodered.org/t/citing-node-red-in-a-scientific-publication/52412 "2021-10-21T11:06:47Z")

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Hello, I'm wondering if there is a standard format for citing Node-RED in a scientific publication. I would like to cite Node-RED in my PhD dissertation. I think it should be interesting to provide this information in …

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## [Adding Firebase JavaScript SDK's to Node-red results in error 'ERR PACKAGE PATH NOT EXPORTED'](https://discourse.nodered.org/t/adding-firebase-javascript-sdks-to-node-red-results-in-error-err-package-path-not-exported/52496)

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**Author:** [@Sulomus](https://discourse.nodered.org/u/Sulomus)\
**Replies:** 7\
**Last updated:** [21 October 2021 10:44 UTC](https://discourse.nodered.org/t/adding-firebase-javascript-sdks-to-node-red-results-in-error-err-package-path-not-exported/52496 "2021-10-21T10:44:06Z")

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Hi everyone, earlier this week I created this post asking if it is possible to add JavaScript Firebase SDK's to Node-red. I got redirected to official Node-red docs and also to this example. I got the example working a…

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## [Can someone test node-red-contrib-curve](https://discourse.nodered.org/t/can-someone-test-node-red-contrib-curve/17385)

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**Author:** [@burner](https://discourse.nodered.org/u/burner)\
**Replies:** 14\
**Last updated:** [21 October 2021 09:30 UTC](https://discourse.nodered.org/t/can-someone-test-node-red-contrib-curve/17385 "2021-10-21T09:30:03Z")

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I have problem with node-red-contrib-curve that it does not show function textbox at all. Can someone test that is that problem at my enviroment or is that node just broken? Here is screenshot https://github.com/sbarwe/n…

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## [On Deploy - FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory](https://discourse.nodered.org/t/on-deploy-fatal-error-ineffective-mark-compacts-near-heap-limit-allocation-failed-javascript-heap-out-of-memory/52490)

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**Author:** [@usherwdp](https://discourse.nodered.org/u/usherwdp)\
**Replies:** 3\
**Last updated:** [21 October 2021 09:16 UTC](https://discourse.nodered.org/t/on-deploy-fatal-error-ineffective-mark-compacts-near-heap-limit-allocation-failed-javascript-heap-out-of-memory/52490 "2021-10-21T09:16:45Z")

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Every time I deploy I get.... \[15:12:09\] INFO: Starting NGinx... 20 Oct 15:12:09 - \[info\] Starting flows 20 Oct 15:12:50 - \[info\] Started flows \<--- Last few GCs ---\> \[481:0x7f9f46c2a0\] 116359 ms: Mark-sweep (reduce…

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## [Custom \<div\> banner above the Editor](https://discourse.nodered.org/t/custom-div-banner-above-the-editor/52284)

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**Author:** [@sambarlas](https://discourse.nodered.org/u/sambarlas)\
**Replies:** 3\
**Last updated:** [21 October 2021 02:03 UTC](https://discourse.nodered.org/t/custom-div-banner-above-the-editor/52284 "2021-10-21T02:03:26Z")

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I am working on a project in which I need a banner header at the top of the screen. I have added my custom css in settings.js editorTheme section. I can't seem to figure out the correct positioning for #red-ui-editor or …

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## [Memory issue processing large csv file](https://discourse.nodered.org/t/memory-issue-processing-large-csv-file/52427)

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**Author:** [@HarryPottar](https://discourse.nodered.org/u/HarryPottar)\
**Replies:** 2\
**Last updated:** [21 October 2021 00:07 UTC](https://discourse.nodered.org/t/memory-issue-processing-large-csv-file/52427 "2021-10-21T00:07:13Z")

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Hi, From what I have googled looks like garbage collection issue. I have multiple csv processing flows, one process 780k rows. It get through around 375959 and then crashes node red node-red\_1 | 19 Oct 11:56:48 - \[w…

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## [How to use node-red-contrib-machine-learning-v2 (NEED HELP AND GUIDANCE FOR UNI PROJECTS)](https://discourse.nodered.org/t/how-to-use-node-red-contrib-machine-learning-v2-need-help-and-guidance-for-uni-projects/52275)

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**Author:** [@puteramelaka](https://discourse.nodered.org/u/puteramelaka)\
**Replies:** 10\
**Last updated:** [20 October 2021 23:25 UTC](https://discourse.nodered.org/t/how-to-use-node-red-contrib-machine-learning-v2-need-help-and-guidance-for-uni-projects/52275 "2021-10-20T23:25:21Z")

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Hello dear friends, im currently collecting accelerometer data for vibration analysis for rotating machinery...the data is send from MQTT to node-red, after asking in this forum i found out there is machine learning in n…

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## [Basic Auth Memory Storage](https://discourse.nodered.org/t/basic-auth-memory-storage/52476)

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**Author:** [@Hannahisme2533](https://discourse.nodered.org/u/Hannahisme2533)\
**Replies:** 4\
**Last updated:** [20 October 2021 20:07 UTC](https://discourse.nodered.org/t/basic-auth-memory-storage/52476 "2021-10-20T20:07:04Z")

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Hello! I'm not really sure where exactly to ask this, but I've been trying to learn more about the security around http-request nodes. Right now, I use a username and password in the http request node for basic auth. I …

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## [My Node Red just died](https://discourse.nodered.org/t/my-node-red-just-died/52425)

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**Author:** [@CarloJongen](https://discourse.nodered.org/u/CarloJongen)\
**Replies:** 24\
**Last updated:** [20 October 2021 19:29 UTC](https://discourse.nodered.org/t/my-node-red-just-died/52425 "2021-10-20T19:29:20Z")

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My Node red has been working fine for quite some time now. But after installing an MQTT broker in NR and trying to do something with it Node Red crashed and I can't get it to start again. https://flows.nodered.org/node/…

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## [When enabled projects node-red wont start and there is problems with the settings.js file](https://discourse.nodered.org/t/when-enabled-projects-node-red-wont-start-and-there-is-problems-with-the-settings-js-file/52481)

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**Author:** [@Macka323](https://discourse.nodered.org/u/Macka323)\
**Replies:** 9\
**Last updated:** [20 October 2021 18:02 UTC](https://discourse.nodered.org/t/when-enabled-projects-node-red-wont-start-and-there-is-problems-with-the-settings-js-file/52481 "2021-10-20T18:02:14Z")

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When enabled projects node-red wont start and there is problems with the settings.js file pi@raspberrypi:~ $ node-red-start …

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## [Html node: Maximum call stack size exceeded](https://discourse.nodered.org/t/html-node-maximum-call-stack-size-exceeded/52356)

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**Author:** [@Ashfaak](https://discourse.nodered.org/u/Ashfaak)\
**Replies:** 10\
**Last updated:** [20 October 2021 15:24 UTC](https://discourse.nodered.org/t/html-node-maximum-call-stack-size-exceeded/52356 "2021-10-20T15:24:59Z")

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Hi I've been successfully using the html node to filter a table. The file grows over time. I'm not sure when it stopped working, but it seems the amount of tags is too high for the node (currently 130900). Is there any…

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## [Need help with uibuilder, Vuex, and Map Helpers](https://discourse.nodered.org/t/need-help-with-uibuilder-vuex-and-map-helpers/52445)

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**Author:** [@tmichaeltx](https://discourse.nodered.org/u/tmichaeltx)\
**Replies:** 7\
**Last updated:** [20 October 2021 14:53 UTC](https://discourse.nodered.org/t/need-help-with-uibuilder-vuex-and-map-helpers/52445 "2021-10-20T14:53:32Z")

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I have run into a roadblock or maybe just confusion on my part when it comes to Vuex coming from uibuilder. Within my index.js file, I have a store. Then I have the app section that (partially) looks like this: const a…

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## [Node-red editor stuck on launch despite --safe flag](https://discourse.nodered.org/t/node-red-editor-stuck-on-launch-despite-safe-flag/52458)

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**Author:** [@pytneri](https://discourse.nodered.org/u/pytneri)\
**Replies:** 10\
**Last updated:** [20 October 2021 14:19 UTC](https://discourse.nodered.org/t/node-red-editor-stuck-on-launch-despite-safe-flag/52458 "2021-10-20T14:19:01Z")

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I've been running node-red successfully for years despite not knowing a thing about linux. After updating a palette yesterday (don't remember which one) the editor won't load anymore. It's eternally stuck at "Loading Nod…

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## [Ip advanced loop msg.host](https://discourse.nodered.org/t/ip-advanced-loop-msg-host/52459)

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**Author:** [@ketpa](https://discourse.nodered.org/u/ketpa)\
**Replies:** 1\
**Last updated:** [20 October 2021 12:37 UTC](https://discourse.nodered.org/t/ip-advanced-loop-msg-host/52459 "2021-10-20T12:37:37Z")

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I have array with ip \[{"nazwa":"T1","ip":"10.0.0.71","opis\_ip\_alarm":"ip alarm 1"},{"nazwa":"T2","ip":"10.0.0.72","opis\_ip\_alarm":null}\] how loop msg.host by ip I try this \[ { "id": "4f61a7737e17d8d3", …

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## [Node red shuts down after 1 minute at windows start up](https://discourse.nodered.org/t/node-red-shuts-down-after-1-minute-at-windows-start-up/52451)

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**Author:** [@hartl](https://discourse.nodered.org/u/hartl)\
**Replies:** 0\
**Last updated:** [20 October 2021 09:16 UTC](https://discourse.nodered.org/t/node-red-shuts-down-after-1-minute-at-windows-start-up/52451 "2021-10-20T09:16:32Z")

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Good morning: When I start Node-red in the start menu of windwos(Boots when windows starts), a minute later it closes, but if I start it manually, this does not happen. Any ideas? Thanks a lot

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## [Multiple instance problem Node-RED](https://discourse.nodered.org/t/multiple-instance-problem-node-red/52409)

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**Author:** [@castigliano](https://discourse.nodered.org/u/castigliano)\
**Replies:** 3\
**Last updated:** [20 October 2021 08:54 UTC](https://discourse.nodered.org/t/multiple-instance-problem-node-red/52409 "2021-10-20T08:54:05Z")

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Hi everyone, I installed recently several Node-RED in my computer, however the first instance intalled some time ago is working different than the previous ones. The dashboard is not working well for instances installed…

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## [Error in installing node-red-contrib-tf-model](https://discourse.nodered.org/t/error-in-installing-node-red-contrib-tf-model/52268)

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**Author:** [@norahb](https://discourse.nodered.org/u/norahb)\
**Replies:** 12\
**Last updated:** [20 October 2021 08:51 UTC](https://discourse.nodered.org/t/error-in-installing-node-red-contrib-tf-model/52268 "2021-10-20T08:51:52Z")

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Hello Whenever I try to install node-red-contrib-tf-model I get this error npm ERR! code ERESOLVE npm ERR! ERESOLVE unable to resolve dependency tree npm ERR! npm ERR! While resolving: node-red-project@0.0.1 npm ERR…

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## [Nodered Text-to-Speech in Windows](https://discourse.nodered.org/t/nodered-text-to-speech-in-windows/51395)

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**Author:** [@sergiobaiao](https://discourse.nodered.org/u/sergiobaiao)\
**Replies:** 13\
**Last updated:** [20 October 2021 01:12 UTC](https://discourse.nodered.org/t/nodered-text-to-speech-in-windows/51395 "2021-10-20T01:12:19Z")

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Hi there guys, I'm trying to setup a simple text-to-speech function in Windows using powershell, but i'm somehow failing miserably. I've managed to create a flow that works: \[ { "id": "8fc0ac7099b7175f", …

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## [Template node send data from function](https://discourse.nodered.org/t/template-node-send-data-from-function/52438)

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**Author:** [@RogierQ](https://discourse.nodered.org/u/RogierQ)\
**Replies:** 10\
**Last updated:** [19 October 2021 22:02 UTC](https://discourse.nodered.org/t/template-node-send-data-from-function/52438 "2021-10-19T22:02:26Z")

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Using template node i created a html page there are image that switch when i click them at a click it sends a payload. What i want to do now is when i click it first time i want to send x if i click it again i want to…

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## [How to move a node between flows without deleting it and losing its unique ID](https://discourse.nodered.org/t/how-to-move-a-node-between-flows-without-deleting-it-and-losing-its-unique-id/52408)

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**Author:** [@bwims](https://discourse.nodered.org/u/bwims)\
**Replies:** 7\
**Last updated:** [19 October 2021 21:14 UTC](https://discourse.nodered.org/t/how-to-move-a-node-between-flows-without-deleting-it-and-losing-its-unique-id/52408 "2021-10-19T21:14:09Z")

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I am using an Alexa skill / node red contrib that provides virtual Alexa devices to Node Red. It works wonderfully, but since it uses the node red node ID to create the virtual device in Alexa, if you need to move the n…

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## [For loop iteration for arrays](https://discourse.nodered.org/t/for-loop-iteration-for-arrays/52436)

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**Author:** [@ecymb1](https://discourse.nodered.org/u/ecymb1)\
**Replies:** 2\
**Last updated:** [19 October 2021 19:47 UTC](https://discourse.nodered.org/t/for-loop-iteration-for-arrays/52436 "2021-10-19T19:47:36Z")

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I am trying to browse through an array of arrays through a FOR loop, but each time it gives me an unjustified error. When I remove the loop, the code works perfectly. The large array basically has these small arrays that…

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## [Tunnel to Internal IP's connect to an external IP](https://discourse.nodered.org/t/tunnel-to-internal-ips-connect-to-an-external-ip/52433)

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**Author:** [@mafify](https://discourse.nodered.org/u/mafify)\
**Replies:** 1\
**Last updated:** [19 October 2021 18:59 UTC](https://discourse.nodered.org/t/tunnel-to-internal-ips-connect-to-an-external-ip/52433 "2021-10-19T18:59:33Z")

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Hello, I have a networking question that you guys might have faced and have an answer for it I have 4 raspberry PI's. One Pi is connected to internet and act as Adhoc, so the other three connect to it and have internet …

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