# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=503

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

**Page:** 504

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## [Failing installing node-mcp23017](https://discourse.nodered.org/t/failing-installing-node-mcp23017/20144)

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**Author:** [@Vittorio](https://discourse.nodered.org/u/Vittorio)\
**Replies:** 29\
**Last updated:** [26 August 2021 09:51 UTC](https://discourse.nodered.org/t/failing-installing-node-mcp23017/20144 "2021-08-26T09:51:13Z")

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Hello everyone !, I've been trying to install node-red-contrib-mcp23017 on a freshly installed instance of node red, via the suggested script for raspberry pi (3b+) running the latest raspbian. Node.js version is v12.1…

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## [Upgrading RPi-3B to latest version of Node-RED](https://discourse.nodered.org/t/upgrading-rpi-3b-to-latest-version-of-node-red/50150)

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**Author:** [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\
**Replies:** 9\
**Last updated:** [26 August 2021 09:25 UTC](https://discourse.nodered.org/t/upgrading-rpi-3b-to-latest-version-of-node-red/50150 "2021-08-26T09:25:13Z")

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I'm trying to grade a RPi-3B, running Buster, to Node-RED 2.0.5 After the upgrade Node-RED gives loads of error message, I suspect because nodejs is still v8.17.0 I used this bash script. This is a screen-shot of the u…

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## [Is it possible to run the Node MCP3008 & run spidev Script at the same time?](https://discourse.nodered.org/t/is-it-possible-to-run-the-node-mcp3008-run-spidev-script-at-the-same-time/50184)

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**Author:** [@Jeff1](https://discourse.nodered.org/u/Jeff1)\
**Replies:** 1\
**Last updated:** [26 August 2021 09:14 UTC](https://discourse.nodered.org/t/is-it-possible-to-run-the-node-mcp3008-run-spidev-script-at-the-same-time/50184 "2021-08-26T09:14:26Z")

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Hey everyone, I'm running a project on raspy using Node-Red & the externer ADC MCP3008. I used to get the digital values of the Sensors via ADC using the Node "node-red-node-pi-mcp3008". I tried to increase the samplin…

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## [Nexmo SMS Text Structure](https://discourse.nodered.org/t/nexmo-sms-text-structure/50191)

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**Author:** [@DrdP](https://discourse.nodered.org/u/DrdP)\
**Replies:** 0\
**Last updated:** [26 August 2021 02:33 UTC](https://discourse.nodered.org/t/nexmo-sms-text-structure/50191 "2021-08-26T02:33:36Z")

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Good Day, I am sending sms to various number with certain messages. Is it possible to have the text display in seperate lines so that i could send a topic with the message below? TIA

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## [How to use node-red for local development](https://discourse.nodered.org/t/how-to-use-node-red-for-local-development/50107)

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**Author:** [@Nathanli](https://discourse.nodered.org/u/Nathanli)\
**Replies:** 2\
**Last updated:** [26 August 2021 01:43 UTC](https://discourse.nodered.org/t/how-to-use-node-red-for-local-development/50107 "2021-08-26T01:43:09Z")

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I want to develop programs with node-red and run them with iss. Leaving aside ibm's bluemix. The node-red environment is configured and can be run, but it can only be saved as a json file. I think the node.js project s…

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## [Filter JSON Object to show only some messages](https://discourse.nodered.org/t/filter-json-object-to-show-only-some-messages/50182)

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**Author:** [@sergiobaiao](https://discourse.nodered.org/u/sergiobaiao)\
**Replies:** 4\
**Last updated:** [26 August 2021 01:37 UTC](https://discourse.nodered.org/t/filter-json-object-to-show-only-some-messages/50182 "2021-08-26T01:37:47Z")

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Hi there, I\`m trying to implement a notification system via Telegram to show notifications from my Ubiquiti Unifi Platform. I've already set the API query to Unifi Controller to query what i want, but it gives me all al…

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## [Interval node per flow vs. single "driver" interval node](https://discourse.nodered.org/t/interval-node-per-flow-vs-single-driver-interval-node/50190)

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**Author:** [@dennishvo](https://discourse.nodered.org/u/dennishvo)\
**Replies:** 1\
**Last updated:** [26 August 2021 00:37 UTC](https://discourse.nodered.org/t/interval-node-per-flow-vs-single-driver-interval-node/50190 "2021-08-26T00:37:49Z")

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I have an application with multiple flows, each driven by it's own interval node that is set to fire every second. Is there a difference between that approach vs linking out from a single interval node to each of the oth…

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## [UI Builder: How to extend an already included package?](https://discourse.nodered.org/t/ui-builder-how-to-extend-an-already-included-package/50188)

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**Author:** [@CreativeWarlock](https://discourse.nodered.org/u/CreativeWarlock)\
**Replies:** 4\
**Last updated:** [25 August 2021 22:50 UTC](https://discourse.nodered.org/t/ui-builder-how-to-extend-an-already-included-package/50188 "2021-08-25T22:50:41Z")

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Good evening, has anyone had the need to extend an already included package with an additional plugin? As an example, I'd like to use a plugin (utc.js) from the dayjs library. In plain JavaScript would be easy to exte…

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## [Home assistant custom integration](https://discourse.nodered.org/t/home-assistant-custom-integration/50189)

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**Author:** [@mrschwarz](https://discourse.nodered.org/u/mrschwarz)\
**Replies:** 0\
**Last updated:** [25 August 2021 22:10 UTC](https://discourse.nodered.org/t/home-assistant-custom-integration/50189 "2021-08-25T22:10:52Z")

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I am new to all of this and I have a very limited understanding. I have a number of devices that I turn on and off with a command line to another linux instance, which I have set up in NR. Status of the same items is det…

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## [Switch not working](https://discourse.nodered.org/t/switch-not-working/50034)

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**Author:** [@ndz](https://discourse.nodered.org/u/ndz)\
**Replies:** 14\
**Last updated:** [25 August 2021 19:46 UTC](https://discourse.nodered.org/t/switch-not-working/50034 "2021-08-25T19:46:51Z")

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Hello guys, can someone tell me whats wrong with this switch I am using to create a telegram chatbot? I would send you the nodes but i cant expose my telegram bot token so i will send some prints instead this is my …

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## [Drop down list does not work with latest Firefox browser, version 91.0.2, dated 2021-08-24](https://discourse.nodered.org/t/drop-down-list-does-not-work-with-latest-firefox-browser-version-91-0-2-dated-2021-08-24/50173)

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**Author:** [@FireWizard52](https://discourse.nodered.org/u/FireWizard52)\
**Replies:** 2\
**Last updated:** [25 August 2021 19:11 UTC](https://discourse.nodered.org/t/drop-down-list-does-not-work-with-latest-firefox-browser-version-91-0-2-dated-2021-08-24/50173 "2021-08-25T19:11:10Z")

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Hi, Normally I use Firefox in Linux OS to access Node Red. Since the last update to version 91.0.2, yesterday the drop down list, does not function anymore. In Google Chrome it functions okay. Running Node Red, versi…

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## [Neopixel and Audio out](https://discourse.nodered.org/t/neopixel-and-audio-out/11968)

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**Author:** [@Danieldz](https://discourse.nodered.org/u/Danieldz)\
**Replies:** 4\
**Last updated:** [25 August 2021 17:05 UTC](https://discourse.nodered.org/t/neopixel-and-audio-out/11968 "2021-08-25T17:05:12Z")

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Good Morning, I am very new to Node Red and Raspberry Pi. I started my first project. I want to control a neopixel strip and play audio files by clicking a button. With the help of Google I managed to setup the neopixel…

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## [Neopixel Apply gamma correction Not working](https://discourse.nodered.org/t/neopixel-apply-gamma-correction-not-working/50170)

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**Author:** [@LostiLama](https://discourse.nodered.org/u/LostiLama)\
**Replies:** 0\
**Last updated:** [25 August 2021 16:59 UTC](https://discourse.nodered.org/t/neopixel-apply-gamma-correction-not-working/50170 "2021-08-25T16:59:00Z")

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My problem is no longer that the wipe time is too long but that the note crashes when I try to switch off the Apply gamma correction i have no idea with this.

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## [Trying to understand - - TypeError: Cannot read property 'length' of undefined](https://discourse.nodered.org/t/trying-to-understand-typeerror-cannot-read-property-length-of-undefined/50168)

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**Author:** [@RaptorUK](https://discourse.nodered.org/u/RaptorUK)\
**Replies:** 2\
**Last updated:** [25 August 2021 16:44 UTC](https://discourse.nodered.org/t/trying-to-understand-typeerror-cannot-read-property-length-of-undefined/50168 "2021-08-25T16:44:06Z")

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I've ben trying to create a set of Yes/No type buttons which after a set timeout will default to "No" . . . I've managed to get it working but lost a lot of time to the following error: TypeError: Cannot read property …

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## [UIBuilder: Click button triggers data pulling and then downloading data](https://discourse.nodered.org/t/uibuilder-click-button-triggers-data-pulling-and-then-downloading-data/50116)

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**Author:** [@CreativeWarlock](https://discourse.nodered.org/u/CreativeWarlock)\
**Replies:** 3\
**Last updated:** [24 August 2021 23:14 UTC](https://discourse.nodered.org/t/uibuilder-click-button-triggers-data-pulling-and-then-downloading-data/50116 "2021-08-24T23:14:58Z")

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Hi there guys! in ui-builder I would like to download data (e.g. JSON data in Excel format via 'vue-json-excel' module). So what I've got is a download button which would send a command to the backend which in return s…

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## [MQTT - Single button press - multiple different actions (in order/sequence)](https://discourse.nodered.org/t/mqtt-single-button-press-multiple-different-actions-in-order-sequence/50125)

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**Author:** [@jmonline86](https://discourse.nodered.org/u/jmonline86)\
**Replies:** 3\
**Last updated:** [25 August 2021 14:49 UTC](https://discourse.nodered.org/t/mqtt-single-button-press-multiple-different-actions-in-order-sequence/50125 "2021-08-25T14:49:33Z")

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Hi all, I'm using Node-RED with HomeAssistant and have a few different automation's up and running (fairly new to it), however I am getting stuck with one requirement in particular and multiple Google searches over the …

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## [Dynamic number of returns in function](https://discourse.nodered.org/t/dynamic-number-of-returns-in-function/50122)

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**Author:** [@spacerabbit](https://discourse.nodered.org/u/spacerabbit)\
**Replies:** 5\
**Last updated:** [25 August 2021 13:11 UTC](https://discourse.nodered.org/t/dynamic-number-of-returns-in-function/50122 "2021-08-25T13:11:28Z")

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Hello, I'm trying to have a dynamic number of returns depending on a variable, I did this but it's only handling up to length 6, and sometimes there's up to 20. I'd like to know a proper way to do it ! Thanks /////////…

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## [Add labels to wires in editor](https://discourse.nodered.org/t/add-labels-to-wires-in-editor/50133)

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**Author:** [@rko](https://discourse.nodered.org/u/rko)\
**Replies:** 7\
**Last updated:** [25 August 2021 11:56 UTC](https://discourse.nodered.org/t/add-labels-to-wires-in-editor/50133 "2021-08-25T11:56:38Z")

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Is there a way to add labels (documentation) to wires in the editor? It would help to understand flows better, I think. Especially when you work in a team or have to change some old flows which you haven't looked at in a…

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## [Not Sure if it would work so im tossing it in here, DMX to Shelly RGBW](https://discourse.nodered.org/t/not-sure-if-it-would-work-so-im-tossing-it-in-here-dmx-to-shelly-rgbw/50146)

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**Author:** [@AppAttack](https://discourse.nodered.org/u/AppAttack)\
**Replies:** 6\
**Last updated:** [25 August 2021 11:44 UTC](https://discourse.nodered.org/t/not-sure-if-it-would-work-so-im-tossing-it-in-here-dmx-to-shelly-rgbw/50146 "2021-08-25T11:44:31Z")

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Hi everyone, im new here, my Name is Michael and im from Germany. I have a few question please dont be angry with me if they are stupid i have never used NodeRed before. I want to use Shelly RGBW in my Master Bedroom,…

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## [Operating time node issue](https://discourse.nodered.org/t/operating-time-node-issue/19528)

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**Author:** [@KELVINHAN95](https://discourse.nodered.org/u/KELVINHAN95)\
**Replies:** 4\
**Last updated:** [25 August 2021 11:33 UTC](https://discourse.nodered.org/t/operating-time-node-issue/19528 "2021-08-25T11:33:37Z")

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Hi I am having an issue with this current flow. I am using the flow from this website https://github.com/cflurin/node-red-contrib-dsm/wiki/Operating-time. As you can see in the image above, The first image shows whe…

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## [InfluxDB keed time formating](https://discourse.nodered.org/t/influxdb-keed-time-formating/50009)

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**Author:** [@Duser](https://discourse.nodered.org/u/Duser)\
**Replies:** 2\
**Last updated:** [25 August 2021 11:13 UTC](https://discourse.nodered.org/t/influxdb-keed-time-formating/50009 "2021-08-25T11:13:12Z")

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Hello. I use node-red-contrib-influxdb. After query it returns time as "2021-08-21T16:50:28.552Z" (if I set RAW it has microseconds). {"\_msgid":"2535bbc93736d80a","payload":\[ {"time":"2021-08-21T16:50:28.552Z","BME280…

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## [Failure to install Windows build tools](https://discourse.nodered.org/t/failure-to-install-windows-build-tools/50144)

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**Author:** [@kakyoism](https://discourse.nodered.org/u/kakyoism)\
**Replies:** 3\
**Last updated:** [25 August 2021 09:42 UTC](https://discourse.nodered.org/t/failure-to-install-windows-build-tools/50144 "2021-08-25T09:42:09Z")

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Being a newbie, by following the Windows setup instruction https://nodered.org/docs/getting-started/windows#2-install-node-red I'm trying to install windows-build-tools, but failed miserably. I've done a lot of intern…

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## [How to access AWS Aurora](https://discourse.nodered.org/t/how-to-access-aws-aurora/50151)

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**Author:** [@anguslou](https://discourse.nodered.org/u/anguslou)\
**Replies:** 0\
**Last updated:** [25 August 2021 09:27 UTC](https://discourse.nodered.org/t/how-to-access-aws-aurora/50151 "2021-08-25T09:27:22Z")

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I have been using Node-Red to read/ write AWS DynamoDB, either by cli or node-red-contrib-aws without any problems. Currently we are going to have a new client using AWS Aurora Cluster, which I have no concept of Aurora.…

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## [Work with rs485](https://discourse.nodered.org/t/work-with-rs485/50132)

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**Author:** [@lexeyfan](https://discourse.nodered.org/u/lexeyfan)\
**Replies:** 3\
**Last updated:** [25 August 2021 08:00 UTC](https://discourse.nodered.org/t/work-with-rs485/50132 "2021-08-25T08:00:27Z")

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friends tell me please, I work with rs485 via usb adapter ch340. node-red use serial in and serial out on dev / ttyUsb0 port. but when I send a request I don't get a response, not in win environment not in linux. the pro…

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## [Preventing timeout errors with the http request node](https://discourse.nodered.org/t/preventing-timeout-errors-with-the-http-request-node/50131)

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**Author:** [@chrisofCCL](https://discourse.nodered.org/u/chrisofCCL)\
**Replies:** 1\
**Last updated:** [25 August 2021 05:52 UTC](https://discourse.nodered.org/t/preventing-timeout-errors-with-the-http-request-node/50131 "2021-08-25T05:52:05Z")

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I have a flow that sometimes sends 'EVENTs' over http, using the http-request node. Events require no response, but of course the http-request node expects one. When one doesn't turn up within the timeout period, it gene…

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## [Regex Function Question](https://discourse.nodered.org/t/regex-function-question/50137)

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**Author:** [@Mick](https://discourse.nodered.org/u/Mick)\
**Replies:** 1\
**Last updated:** [25 August 2021 01:45 UTC](https://discourse.nodered.org/t/regex-function-question/50137 "2021-08-25T01:45:10Z")

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@Steve-Mcl Steve, I am trying to modify the regex func you gave me to do a multiple pass and look for the 1st key word ('client' and then set the 2nd regex pass to use that. That way I don't have to make multiple f…

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## [230V power metering on rpi](https://discourse.nodered.org/t/230v-power-metering-on-rpi/5082)

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**Author:** [@tarbax](https://discourse.nodered.org/u/tarbax)\
**Replies:** 16\
**Last updated:** [24 August 2021 23:54 UTC](https://discourse.nodered.org/t/230v-power-metering-on-rpi/5082 "2021-08-24T23:54:07Z")

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i am currently busy with pond demotics. (relays,temp sensors,buttons, water level, lights and flow meter etc) And i would like to add a current sensor so i can messure how mush power the whole pond uses. what sensor do…

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## [Best practices for Node-RED proxy endpoints?](https://discourse.nodered.org/t/best-practices-for-node-red-proxy-endpoints/50119)

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**Author:** [@johnwalicki](https://discourse.nodered.org/u/johnwalicki)\
**Replies:** 2\
**Last updated:** [24 August 2021 20:27 UTC](https://discourse.nodered.org/t/best-practices-for-node-red-proxy-endpoints/50119 "2021-08-24T20:27:12Z")

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I have a flow that implements a proxy for a secure API. It has a HTTP In, which takes a bunch of parameters. The flow modifies the inputs, adds an Auth Token and calls some other HTTP request node to perform the task. T…

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## [Module error node-red](https://discourse.nodered.org/t/module-error-node-red/50066)

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**Author:** [@owmath](https://discourse.nodered.org/u/owmath)\
**Replies:** 8\
**Last updated:** [24 August 2021 20:12 UTC](https://discourse.nodered.org/t/module-error-node-red/50066 "2021-08-24T20:12:11Z")

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how do I format my node-red and fix this error? i'm new to node-red, how do I format and reinstall again

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## [Mssql-plus - ECONNCLOSED - Connection is closed](https://discourse.nodered.org/t/mssql-plus-econnclosed-connection-is-closed/50083)

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**Author:** [@tusharacc](https://discourse.nodered.org/u/tusharacc)\
**Replies:** 2\
**Last updated:** [24 August 2021 19:29 UTC](https://discourse.nodered.org/t/mssql-plus-econnclosed-connection-is-closed/50083 "2021-08-24T19:29:51Z")

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I have a below flow - Inject -\> Query SQL Server A -\> Randomly Select 10 records -\> split (based on array length of 1) -\> Query SQL Server B -\> debug message object During this flow, I get connection is closed for the …

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