# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=449

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

**Page:** 450

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## [Christmas lights to music](https://discourse.nodered.org/t/christmas-lights-to-music/55444)

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**Author:** [@Lights1971](https://discourse.nodered.org/u/Lights1971)\
**Replies:** 3\
**Last updated:** [22 December 2021 10:15 UTC](https://discourse.nodered.org/t/christmas-lights-to-music/55444 "2021-12-22T10:15:33Z")

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I have connected some LED christmas lights to GPIO outputs on a RPi with the intention of synchronizing them to music. In the past I have used lightshowpi which did the job perfectly, however I was hoping to use nodered…

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## [How to Install node from GitHub](https://discourse.nodered.org/t/how-to-install-node-from-github/55549)

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**Author:** [@borpin](https://discourse.nodered.org/u/borpin)\
**Replies:** 5\
**Last updated:** [22 December 2021 09:39 UTC](https://discourse.nodered.org/t/how-to-install-node-from-github/55549 "2021-12-22T09:39:27Z")

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I'm sure this should be in the documentation somewhere but I have failed to find it. I want to install a node from GitHub (it is a fork of a node in NPM - not installed via pallette). How can I do that - system is a ba…

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## [A way to disable the deploy toast notification](https://discourse.nodered.org/t/a-way-to-disable-the-deploy-toast-notification/55479)

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**Author:** [@nileio](https://discourse.nodered.org/u/nileio)\
**Replies:** 9\
**Last updated:** [22 December 2021 09:21 UTC](https://discourse.nodered.org/t/a-way-to-disable-the-deploy-toast-notification/55479 "2021-12-22T09:21:25Z")

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Hi all, I wonder if there is a way that I can disable the toast notification that shows up when deploying a flow, or reduce the delay. I build lots of flows and I find that notification eye straining and intrusive. I am…

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## [NodeRed Backup Node](https://discourse.nodered.org/t/nodered-backup-node/55543)

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**Author:** [@Flixm](https://discourse.nodered.org/u/Flixm)\
**Replies:** 4\
**Last updated:** [22 December 2021 09:16 UTC](https://discourse.nodered.org/t/nodered-backup-node/55543 "2021-12-22T09:16:29Z")

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Hi there, last week i lost my working node red working at my Pi. I had an Backup which is much to old ... old story. So i setup a new system with a "part" of my way too old Backup. The weekend was gone. My qustion is: …

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## [Where is the root directory of node-red in the docker image?](https://discourse.nodered.org/t/where-is-the-root-directory-of-node-red-in-the-docker-image/55541)

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**Author:** [@TheYolo](https://discourse.nodered.org/u/TheYolo)\
**Replies:** 7\
**Last updated:** [22 December 2021 08:05 UTC](https://discourse.nodered.org/t/where-is-the-root-directory-of-node-red-in-the-docker-image/55541 "2021-12-22T08:05:48Z")

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Hello, I'm trying to install a package to my image I'm building. I've been searching around on the base image (nodered/node-red) and it seems to be /usr/src/node-red/? When installing extensions they state I have to be…

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## [Exec Node - How to](https://discourse.nodered.org/t/exec-node-how-to/55530)

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**Author:** [@JoseGodinho](https://discourse.nodered.org/u/JoseGodinho)\
**Replies:** 4\
**Last updated:** [21 December 2021 22:26 UTC](https://discourse.nodered.org/t/exec-node-how-to/55530 "2021-12-21T22:26:10Z")

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hello I would apreciate the support how to run this sett of linux/raspbian commands. ( using exec node?) if so how? # Stop Zigbee2MQTT and go to directory sudo systemctl stop zigbee2mqtt cd /opt/zigbee2mqtt # Backup…

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## [Prepare array of JSON-Objects with jsonata through change-node for node-red-dashboard multiline-chart](https://discourse.nodered.org/t/prepare-array-of-json-objects-with-jsonata-through-change-node-for-node-red-dashboard-multiline-chart/55495)

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**Author:** [@hwr](https://discourse.nodered.org/u/hwr)\
**Replies:** 6\
**Last updated:** [21 December 2021 20:59 UTC](https://discourse.nodered.org/t/prepare-array-of-json-objects-with-jsonata-through-change-node-for-node-red-dashboard-multiline-chart/55495 "2021-12-21T20:59:43Z")

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Hi, trying to transform an array of JSON-objects for dashboard-chart-node, I have problems with jsonata-code. Probably it's not hard to solve, thank you for helping! The third graph ('CALC') is already prepared prope…

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## [Having problem with svg node](https://discourse.nodered.org/t/having-problem-with-svg-node/54097)

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**Author:** [@d0d04m3](https://discourse.nodered.org/u/d0d04m3)\
**Replies:** 8\
**Last updated:** [21 December 2021 20:31 UTC](https://discourse.nodered.org/t/having-problem-with-svg-node/54097 "2021-12-21T20:31:45Z")

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hi I cant work with event or binding I dont known what this issus \[ { "id": "b546d85c72cb1a50", "type": "ui\_svg\_graphics", "z": "70370e82972416b2", "group": "9bcb92fcaf773f25", …

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## [Problems converting webhook to JSON object](https://discourse.nodered.org/t/problems-converting-webhook-to-json-object/55532)

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**Author:** [@HaltHammerzeit](https://discourse.nodered.org/u/HaltHammerzeit)\
**Replies:** 1\
**Last updated:** [21 December 2021 17:41 UTC](https://discourse.nodered.org/t/problems-converting-webhook-to-json-object/55532 "2021-12-21T17:41:19Z")

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Hello all. I suppose I should mention that I am quite new to Node-RED. :slight\_smile: I have a webhook from Plex being sent to Node-RED via http://webhookrelay.com. I have the connector node working, and RED is receivi…

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## [Payload is set to false](https://discourse.nodered.org/t/payload-is-set-to-false/55490)

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**Author:** [@hanine](https://discourse.nodered.org/u/hanine)\
**Replies:** 10\
**Last updated:** [21 December 2021 16:56 UTC](https://discourse.nodered.org/t/payload-is-set-to-false/55490 "2021-12-21T16:56:41Z")

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Hello can someone help i don't understand why payload is set to false here when iam setting it to this its the body of the request Thank you in advance

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## [Upload file to Synology Filestation over API](https://discourse.nodered.org/t/upload-file-to-synology-filestation-over-api/55529)

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**Author:** [@UweG](https://discourse.nodered.org/u/UweG)\
**Replies:** 1\
**Last updated:** [21 December 2021 16:51 UTC](https://discourse.nodered.org/t/upload-file-to-synology-filestation-over-api/55529 "2021-12-21T16:51:27Z")

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Has anyone managed to upload a file to the filestation via synology api using nodered? I manage to download files via the api from the synology. I can't figure it out from Synology's FileStation API documentation. Her…

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## [Sending an email to a microsoft exchange server](https://discourse.nodered.org/t/sending-an-email-to-a-microsoft-exchange-server/55342)

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**Author:** [@bigunwhistle](https://discourse.nodered.org/u/bigunwhistle)\
**Replies:** 10\
**Last updated:** [21 December 2021 15:42 UTC](https://discourse.nodered.org/t/sending-an-email-to-a-microsoft-exchange-server/55342 "2021-12-21T15:42:11Z")

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I'm playing around with trying to get node-red to send me an email through my exchange server. I do this all the time with other applications. Ive tried the mail node on here but it isn't letting me inject the email. I…

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## [What is causing object in context to change?](https://discourse.nodered.org/t/what-is-causing-object-in-context-to-change/55524)

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**Author:** [@hazymat](https://discourse.nodered.org/u/hazymat)\
**Replies:** 7\
**Last updated:** [21 December 2021 14:44 UTC](https://discourse.nodered.org/t/what-is-causing-object-in-context-to-change/55524 "2021-12-21T14:44:10Z")

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Hi all Is there a way to somehow see what is updating an object in global context? I am pretty sure there is not. But is there another way to monitor IF and WHEN an object is changing? Any kind of dirty hack is fine. R…

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## [Modbus RTU Sniffer](https://discourse.nodered.org/t/modbus-rtu-sniffer/55174)

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**Author:** [@inGo](https://discourse.nodered.org/u/inGo)\
**Replies:** 10\
**Last updated:** [21 December 2021 14:02 UTC](https://discourse.nodered.org/t/modbus-rtu-sniffer/55174 "2021-12-21T14:02:45Z")

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Hello, I have an existing Modbus RTU network with a master and a slave. The slave is an energy meter, slave adress is 30: datasheet It is not possible to use the known node-red-contrib-modbus because the network is al…

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## [Installing Node-Red on Linux](https://discourse.nodered.org/t/installing-node-red-on-linux/54957)

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**Author:** [@binyameenaslam342](https://discourse.nodered.org/u/binyameenaslam342)\
**Replies:** 13\
**Last updated:** [21 December 2021 13:48 UTC](https://discourse.nodered.org/t/installing-node-red-on-linux/54957 "2021-12-21T13:48:13Z")

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I am also facing a similar Nodejs issue on ubuntu. Here is the error. Running Node-RED install for user dem at /home/dem on ubuntu Nodejs 10 is no longer supported. You can update to the latest Node-RED 1.x version b…

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## [Node-red-node-email, Severity: moderate with npm audit](https://discourse.nodered.org/t/node-red-node-email-severity-moderate-with-npm-audit/55508)

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**Author:** [@sahsha](https://discourse.nodered.org/u/sahsha)\
**Replies:** 2\
**Last updated:** [21 December 2021 10:53 UTC](https://discourse.nodered.org/t/node-red-node-email-severity-moderate-with-npm-audit/55508 "2021-12-21T10:53:38Z")

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it not like I'm getting any error yet. thought to share and understand why its happening. 4 moderate severity vulnerabilities is shown when I install a node using npm command line and when entered 'npm audit', below is…

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## [Sum up values from different text nodes](https://discourse.nodered.org/t/sum-up-values-from-different-text-nodes/55513)

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**Author:** [@MR76](https://discourse.nodered.org/u/MR76)\
**Replies:** 3\
**Last updated:** [21 December 2021 10:00 UTC](https://discourse.nodered.org/t/sum-up-values-from-different-text-nodes/55513 "2021-12-21T10:00:31Z")

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Hey guys, I have 3 text nodes that have certain values written to them once a day. I now want to sum them up once a day and have them in another text node. I would also like to save the values until they are overwritten…

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## [Add dependencies to docker image](https://discourse.nodered.org/t/add-dependencies-to-docker-image/55516)

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**Author:** [@TheYolo](https://discourse.nodered.org/u/TheYolo)\
**Replies:** 0\
**Last updated:** [21 December 2021 09:35 UTC](https://discourse.nodered.org/t/add-dependencies-to-docker-image/55516 "2021-12-21T09:35:23Z")

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I've been following the documentation (Running under Docker : Node-RED) but can't figure it out. It builds but when I try to open 127.0.0.1:1880 I get ERR\_CONNECTION\_REFUSED in Chrome, so the web service is not running? …

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## [What is wrong with my function. Please](https://discourse.nodered.org/t/what-is-wrong-with-my-function-please/55211)

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**Author:** [@bogi](https://discourse.nodered.org/u/bogi)\
**Replies:** 7\
**Last updated:** [21 December 2021 00:37 UTC](https://discourse.nodered.org/t/what-is-wrong-with-my-function-please/55211 "2021-12-21T00:37:45Z")

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Guys, i'm fighting with my Flow. I'm receiving mqqt messages from ESP01 which reads BME280 and 32 ADC channels (NTC resistors for temprature readings). Additionally i hooked up PZEM-004 for power monitoring. All of that…

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## [Best practice to avoid using Change node at every junction for topic matching?](https://discourse.nodered.org/t/best-practice-to-avoid-using-change-node-at-every-junction-for-topic-matching/55334)

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**Author:** [@kakyoism](https://discourse.nodered.org/u/kakyoism)\
**Replies:** 26\
**Last updated:** [20 December 2021 23:58 UTC](https://discourse.nodered.org/t/best-practice-to-avoid-using-change-node-at-every-junction-for-topic-matching/55334 "2021-12-20T23:58:36Z")

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If Node X 's output is used as the input of Node Y, the output message topic of Node X must match the input message topic of Node Y, the easiest solution I found is to insert a Change node between them for explicit topic…

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## [New sensor add problem](https://discourse.nodered.org/t/new-sensor-add-problem/55488)

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**Author:** [@AD2TM](https://discourse.nodered.org/u/AD2TM)\
**Replies:** 3\
**Last updated:** [20 December 2021 21:53 UTC](https://discourse.nodered.org/t/new-sensor-add-problem/55488 "2021-12-20T21:53:23Z")

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I have several of the Sonoff TH series of devices. When I want to deploy a new devices, Node Red wants to keep the former settings for the last sensor I added. It is very frustrating to fight Node Red to accept just t…

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## [NodeRed 2.x Guided Tour Lib or Tool was used to showcase new features?](https://discourse.nodered.org/t/nodered-2-x-guided-tour-lib-or-tool-was-used-to-showcase-new-features/54708)

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**Author:** [@karlyboy](https://discourse.nodered.org/u/karlyboy)\
**Replies:** 6\
**Last updated:** [20 December 2021 21:29 UTC](https://discourse.nodered.org/t/nodered-2-x-guided-tour-lib-or-tool-was-used-to-showcase-new-features/54708 "2021-12-20T21:29:53Z")

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Hi, Anyone know what tool or library was used on the intro of Note Red 2, that tags elements, and provides a spot light on them with information on what is new - sort of guided tour. I really liked this bit of polish on…

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## [Installing Windows Build Tools](https://discourse.nodered.org/t/installing-windows-build-tools/54584)

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**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\
**Replies:** 33\
**Last updated:** [20 December 2021 19:36 UTC](https://discourse.nodered.org/t/installing-windows-build-tools/54584 "2021-12-20T19:36:53Z")

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In the instructions for installing on Windows, under " Installing Node.js Windows Build Tools" it gives two options. It says to use the second one "If you wish to have the built-in Python v2.7 install exposed for use". …

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## [Join two messages with the same topic](https://discourse.nodered.org/t/join-two-messages-with-the-same-topic/55441)

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**Author:** [@JobbeDeluxe](https://discourse.nodered.org/u/JobbeDeluxe)\
**Replies:** 3\
**Last updated:** [20 December 2021 17:20 UTC](https://discourse.nodered.org/t/join-two-messages-with-the-same-topic/55441 "2021-12-20T17:20:44Z")

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Hello Guys, 9 devices get at the same time the command to tell the IP adress, than they get another Command to tell the Devie name. I get 9 answers, all with the own device topic, nice. But now i would like to join the…

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## [Dynamic function call - eval alternative](https://discourse.nodered.org/t/dynamic-function-call-eval-alternative/55492)

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**Author:** [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Replies:** 3\
**Last updated:** [20 December 2021 17:18 UTC](https://discourse.nodered.org/t/dynamic-function-call-eval-alternative/55492 "2021-12-20T17:18:48Z")

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Lets say i have function node that implements various api functions and I want to dynamically call those functions based on a msg property. In the browser one would call the windows\[fn\] but that is not available in nodej…

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## [Condition based http response](https://discourse.nodered.org/t/condition-based-http-response/55481)

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**Author:** [@jinesh](https://discourse.nodered.org/u/jinesh)\
**Replies:** 4\
**Last updated:** [20 December 2021 17:05 UTC](https://discourse.nodered.org/t/condition-based-http-response/55481 "2021-12-20T17:05:09Z")

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On http in node we are sending a request to the MQTT broker using mqtt out node and on MQTT in node response we need to trigger the HTTP response. we tried with below but doesnt seem to work, can anyone please help m…

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## [Note-Red dont work like i want it to](https://discourse.nodered.org/t/note-red-dont-work-like-i-want-it-to/55489)

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**Author:** [@bluescreentt](https://discourse.nodered.org/u/bluescreentt)\
**Replies:** 0\
**Last updated:** [20 December 2021 16:52 UTC](https://discourse.nodered.org/t/note-red-dont-work-like-i-want-it-to/55489 "2021-12-20T16:52:17Z")

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Hi so after my last post I have tried many different approaches but i keedp getting stuck. I am struggling with the Sonoff motion sensor and a light automation. I have made this and it works. yes i know it might not…

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## [Influx DB delete some measurments](https://discourse.nodered.org/t/influx-db-delete-some-measurments/55452)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 8\
**Last updated:** [20 December 2021 16:12 UTC](https://discourse.nodered.org/t/influx-db-delete-some-measurments/55452 "2021-12-20T16:12:54Z")

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Hello i know not a Node Red Problem. but the better Forum to get help! i still use Influx DB 1.8x a Sensor send wrong data Temperatur over 7000 Degree. i would like to delete them i find the wrong entry and delete th…

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## [Can reconstruct node red？](https://discourse.nodered.org/t/can-reconstruct-node-red/55484)

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**Author:** [@lele](https://discourse.nodered.org/u/lele)\
**Replies:** 4\
**Last updated:** [20 December 2021 15:39 UTC](https://discourse.nodered.org/t/can-reconstruct-node-red/55484 "2021-12-20T15:39:58Z")

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I'm a front-end newcomer. I am currently developing a project based on node red, but as the project becomes more and more complex, I think the maintainability is getting worse and worse, because a lot of jQuery is used …

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## [MQTT to node-red-node-ui-vega - Any working examples available?](https://discourse.nodered.org/t/mqtt-to-node-red-node-ui-vega-any-working-examples-available/55486)

<div class="topic-metadata">

**Author:** [@pentala](https://discourse.nodered.org/u/pentala)\
**Replies:** 1\
**Last updated:** [20 December 2021 15:29 UTC](https://discourse.nodered.org/t/mqtt-to-node-red-node-ui-vega-any-working-examples-available/55486 "2021-12-20T15:29:44Z")

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Hi, I am just getting started with a Node-RED implementation and can see how flexible and powerful the system is. I have already configured several flows (MQTT Inputs) to switch and then display using various formats on…

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