# Latest

**URL:** https://discourse.nodered.org/latest.md?page=922

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

**Page:** 923

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## [Node-RED to OctoPrint Integration](https://discourse.nodered.org/t/node-red-to-octoprint-integration/38264)

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**Author:** [@devittobk](https://discourse.nodered.org/u/devittobk)\
**Replies:** 2\
**Last updated:** [30 December 2020 09:52 UTC](https://discourse.nodered.org/t/node-red-to-octoprint-integration/38264 "2020-12-30T09:52:17Z")

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Hi, I have a plan on building a 3D Printing Farm, using an ERP software, OctoPrint and Node-RED. My main focus right now is to integrate Node-RED with OctoPrint, more specifically using Node-RED to trigger/click the 'S…

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## [HTTP response autorefresh?](https://discourse.nodered.org/t/http-response-autorefresh/38247)

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**Author:** [@nicedevil](https://discourse.nodered.org/u/nicedevil)\
**Replies:** 5\
**Last updated:** [30 December 2020 09:47 UTC](https://discourse.nodered.org/t/http-response-autorefresh/38247 "2020-12-30T09:47:00Z")

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Hey guys, I'm about to create a small webpage for my 3D printer in node-red. Right now it is looking like this: It is just a test right now and I'm struggling with the part where the temps/progress would be automati…

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## [Issue with config node](https://discourse.nodered.org/t/issue-with-config-node/38191)

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**Author:** [@brainbugfix](https://discourse.nodered.org/u/brainbugfix)\
**Replies:** 3\
**Last updated:** [30 December 2020 09:39 UTC](https://discourse.nodered.org/t/issue-with-config-node/38191 "2020-12-30T09:39:49Z")

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Hi, I have an issue with a config node. I created a custom node having two config nodes. This was working fine until I changed some input fields of one of the config nodes. When I run this on my development instance eve…

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## [Triggering OctoPrint using Node-RED](https://discourse.nodered.org/t/triggering-octoprint-using-node-red/38265)

<div class="topic-metadata">

**Author:** [@devittobk](https://discourse.nodered.org/u/devittobk)\
**Replies:** 1\
**Last updated:** [30 December 2020 09:00 UTC](https://discourse.nodered.org/t/triggering-octoprint-using-node-red/38265 "2020-12-30T09:00:03Z")

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Hi, I have a plan on building a 3D Printing Farm, using an ERP software, OctoPrint and Node-RED. Is it possible to use Node-RED to trigger/click the 'Start Print' button on OctoPrint? I was thinking of using the 'http…

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## [I need help to find closest match from DB](https://discourse.nodered.org/t/i-need-help-to-find-closest-match-from-db/38176)

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**Author:** [@ajbuk21](https://discourse.nodered.org/u/ajbuk21)\
**Replies:** 29\
**Last updated:** [30 December 2020 08:47 UTC](https://discourse.nodered.org/t/i-need-help-to-find-closest-match-from-db/38176 "2020-12-30T08:47:33Z")

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hi evryone, i have been tiring for a few days now to create a flow that will use a light sensor to check a color and i need it too find closest color match to none samples stored in mysql so fare i have most of it work…

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## [Node-RED Contrib Browser Utils](https://discourse.nodered.org/t/node-red-contrib-browser-utils/37955)

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**Author:** [@NodeC](https://discourse.nodered.org/u/NodeC)\
**Replies:** 2\
**Last updated:** [30 December 2020 06:42 UTC](https://discourse.nodered.org/t/node-red-contrib-browser-utils/37955 "2020-12-30T06:42:22Z")

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Node-RED Contrib Browser Utils This pallet has some very useful nodes. But, there are not accessible using the dashboard button. Any possible way to modify the js or html file where a button from dashboard can activate …

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## [Global JSON variable](https://discourse.nodered.org/t/global-json-variable/36084)

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**Author:** [@lolimpol](https://discourse.nodered.org/u/lolimpol)\
**Replies:** 7\
**Last updated:** [30 December 2020 01:36 UTC](https://discourse.nodered.org/t/global-json-variable/36084 "2020-12-30T01:36:51Z")

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Hi, I'm pretty new to Node-red, I've been using it for about 2 years, but only to set things up. Im doing a mayor overhaull on my MQTT based smarthome, which has lights with many ways of controlling them, and I want my d…

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## [Referrencing msg.payload in JSON](https://discourse.nodered.org/t/referrencing-msg-payload-in-json/986)

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**Author:** [@liambroughton500](https://discourse.nodered.org/u/liambroughton500)\
**Replies:** 31\
**Last updated:** [30 December 2020 01:28 UTC](https://discourse.nodered.org/t/referrencing-msg-payload-in-json/986 "2020-12-30T01:28:28Z")

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Hi all, I have been trying to send text messages through Node-RED, I know there are numerous ways to do this, but the way I have settled on at the moment is using Click Send. I have followed the example on the tutorial,…

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## [Contrib-counter to ui-table](https://discourse.nodered.org/t/contrib-counter-to-ui-table/38234)

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**Author:** [@dvyjns](https://discourse.nodered.org/u/dvyjns)\
**Replies:** 1\
**Last updated:** [30 December 2020 00:38 UTC](https://discourse.nodered.org/t/contrib-counter-to-ui-table/38234 "2020-12-30T00:38:18Z")

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I have contrib-counter set up to count jars going past an industrial photoelectric sensor on a conveyor line. I'd like to integrate ui-table to display how many jars per day. I'd like it to look something like the image …

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## [How to implement a sensor enable/disable node?](https://discourse.nodered.org/t/how-to-implement-a-sensor-enable-disable-node/38228)

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**Author:** [@jabss](https://discourse.nodered.org/u/jabss)\
**Replies:** 4\
**Last updated:** [29 December 2020 23:28 UTC](https://discourse.nodered.org/t/how-to-implement-a-sensor-enable-disable-node/38228 "2020-12-29T23:28:02Z")

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Hi, I admit I'm not 100% aware of node red concepts, and I've been struggling in the last few days to have some basic flows working. At the moment I have a sonoff PIR connected to zigbee2MQTT --\> MQTT --\> NodeRed --\> I…

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## [Fan control with condition](https://discourse.nodered.org/t/fan-control-with-condition/38141)

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**Author:** [@Deathsoul](https://discourse.nodered.org/u/Deathsoul)\
**Replies:** 24\
**Last updated:** [29 December 2020 22:27 UTC](https://discourse.nodered.org/t/fan-control-with-condition/38141 "2020-12-29T22:27:49Z")

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I try to create a node with 7 condition if all condition it activate my blower, if it not it turn off... The blower take hot air in my basement fire place(sensor1), and transfer it in my living-room(sensor2) My others …

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## [Explicit userMenu theme property](https://discourse.nodered.org/t/explicit-usermenu-theme-property/38196)

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**Author:** [@tfmf](https://discourse.nodered.org/u/tfmf)\
**Replies:** 2\
**Last updated:** [29 December 2020 22:11 UTC](https://discourse.nodered.org/t/explicit-usermenu-theme-property/38196 "2020-12-29T22:11:53Z")

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Hi all, I have been testing the theme editor by following this article, and one thing I noticed is once you set the userMenu in in the editorTheme section you can't explicit set true. By taking a look into the code, it …

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## [Subflow Question](https://discourse.nodered.org/t/subflow-question/38242)

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**Author:** [@tvan0076](https://discourse.nodered.org/u/tvan0076)\
**Replies:** 2\
**Last updated:** [29 December 2020 21:43 UTC](https://discourse.nodered.org/t/subflow-question/38242 "2020-12-29T21:43:22Z")

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I am building many subflows to share with other flows in Node-Red. What will happen if 2 or more flows call the same subflow at almost the same time? Will the flow data stay separate from the other flows calling the su…

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## [System $ environmental variables empty result](https://discourse.nodered.org/t/system-environmental-variables-empty-result/38212)

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**Author:** [@coen17st](https://discourse.nodered.org/u/coen17st)\
**Replies:** 10\
**Last updated:** [29 December 2020 21:04 UTC](https://discourse.nodered.org/t/system-environmental-variables-empty-result/38212 "2020-12-29T21:04:26Z")

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Hi, i am running Node-RED on Ubuntu. In a bash script i export a variable like this: export TEST=TEST or export TEST=TEST \>\> ~/.bashrc when i typ printenv in de commandline i can see the variable is set JOURNAL\_STRE…

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## [Looking for help to find an icon for a task](https://discourse.nodered.org/t/looking-for-help-to-find-an-icon-for-a-task/38236)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 1\
**Last updated:** [29 December 2020 20:46 UTC](https://discourse.nodered.org/t/looking-for-help-to-find-an-icon-for-a-task/38236 "2020-12-29T20:46:29Z")

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I have a schedule and I want to add a button that allows a skip today to happen. I guess - push coming to shove - I could just make a button with SKIP on it. But..... I was wondering if there is an icon that relays t…

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## [Http Request not responding correctly](https://discourse.nodered.org/t/http-request-not-responding-correctly/38199)

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**Author:** [@Oymyakon](https://discourse.nodered.org/u/Oymyakon)\
**Replies:** 4\
**Last updated:** [29 December 2020 20:31 UTC](https://discourse.nodered.org/t/http-request-not-responding-correctly/38199 "2020-12-29T20:31:10Z")

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Hi, i am new to Node red but i am having trouble getting a HTTP request to work. I am trying to access the river level from the government web site. It looks like the response from the web page is being truncated. any …

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## [How do I filter and examine only 1 data set?](https://discourse.nodered.org/t/how-do-i-filter-and-examine-only-1-data-set/38231)

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**Author:** [@traderjoe](https://discourse.nodered.org/u/traderjoe)\
**Replies:** 0\
**Last updated:** [29 December 2020 19:28 UTC](https://discourse.nodered.org/t/how-do-i-filter-and-examine-only-1-data-set/38231 "2020-12-29T19:28:16Z")

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Let's say I have 10 devices, each device produces 5 different data points. They are all being fed back to node-red. Each screen will show the 5 different data. But I'm envisioning a drop down selecting the different d…

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## [Why is the time in the NR log not local time?](https://discourse.nodered.org/t/why-is-the-time-in-the-nr-log-not-local-time/4162)

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**Author:** [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Replies:** 34\
**Last updated:** [29 December 2020 18:10 UTC](https://discourse.nodered.org/t/why-is-the-time-in-the-nr-log-not-local-time/4162 "2020-12-29T18:10:41Z")

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OSX: 10.13.6 When I start NR I notice that the time in the log looks to be UTC and not my local time. Is there a way to change it to show local time? Here is a example: Pauls-mini:~ Paul$ date Sun Oct 21 06:38:35 EDT …

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## [Need help thinking about my project](https://discourse.nodered.org/t/need-help-thinking-about-my-project/38203)

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**Author:** [@brendonhatcher](https://discourse.nodered.org/u/brendonhatcher)\
**Replies:** 6\
**Last updated:** [29 December 2020 17:43 UTC](https://discourse.nodered.org/t/need-help-thinking-about-my-project/38203 "2020-12-29T17:43:58Z")

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Hi I am quite new to Node-RED. I am a Code Club volunteer, with an interest in Making and Computational Thinking. I am working on a project to introduce Node-RED to Code Club audiences (9 - 13 years old). I have crea…

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## [Convert Text to hex](https://discourse.nodered.org/t/convert-text-to-hex/38214)

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**Author:** [@Mattia.88](https://discourse.nodered.org/u/Mattia.88)\
**Replies:** 4\
**Last updated:** [29 December 2020 17:06 UTC](https://discourse.nodered.org/t/convert-text-to-hex/38214 "2020-12-29T17:06:15Z")

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Hi, I must convert a text to hex. I wrote this: var art = 'A'; var arr = ; arr\[0\] =art.toString(16); but the result is always "A". Is correct this sintax? thanks

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## [Custom Authentication And Replacing Application Tokens](https://discourse.nodered.org/t/custom-authentication-and-replacing-application-tokens/37508)

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**Author:** [@shaounak](https://discourse.nodered.org/u/shaounak)\
**Replies:** 8\
**Last updated:** [29 December 2020 16:37 UTC](https://discourse.nodered.org/t/custom-authentication-and-replacing-application-tokens/37508 "2020-12-29T16:37:47Z")

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We are using node-red as our job orchestration tool. We want to perform the custom authentication to API and reuse the JWT tokens generated after the API authentication in the node-red front end to perform some API calls…

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## [Electron with node red existing project errors](https://discourse.nodered.org/t/electron-with-node-red-existing-project-errors/38093)

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**Author:** [@Verina](https://discourse.nodered.org/u/Verina)\
**Replies:** 8\
**Last updated:** [29 December 2020 16:33 UTC](https://discourse.nodered.org/t/electron-with-node-red-existing-project-errors/38093 "2020-12-29T16:33:30Z")

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I'm trying to wrap a project(with uibuilder) with electron. I managed to get it as desktop app with my first page runing, but it threw some errors. Some were about the locations of script files, I tried to solve those …

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## [Payload Object read out](https://discourse.nodered.org/t/payload-object-read-out/38211)

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**Author:** [@luci812](https://discourse.nodered.org/u/luci812)\
**Replies:** 4\
**Last updated:** [29 December 2020 16:29 UTC](https://discourse.nodered.org/t/payload-object-read-out/38211 "2020-12-29T16:29:54Z")

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Hi there I'm new here and also new to NodeRed. I have a question and you can help me to read out the following data: I would like to read out the individual data here in order to then display them. Unfortunately, I…

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## [Display on chart data collected by serial Port](https://discourse.nodered.org/t/display-on-chart-data-collected-by-serial-port/38171)

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**Author:** [@298christian](https://discourse.nodered.org/u/298christian)\
**Replies:** 2\
**Last updated:** [29 December 2020 15:54 UTC](https://discourse.nodered.org/t/display-on-chart-data-collected-by-serial-port/38171 "2020-12-29T15:54:48Z")

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Hi expert, I'm using a raspberry for collecting data over serial Port. What kind of nodes can I use to correctly manage the values ​​to be displayed in the dashboard as a graph? I need add only 1 or 2 temperatures for …

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## [Get item from Array dynamically](https://discourse.nodered.org/t/get-item-from-array-dynamically/38195)

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**Author:** [@MarcoVg](https://discourse.nodered.org/u/MarcoVg)\
**Replies:** 7\
**Last updated:** [29 December 2020 15:20 UTC](https://discourse.nodered.org/t/get-item-from-array-dynamically/38195 "2020-12-29T15:20:28Z")

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Hello, I nedd to read from an array of object the row that in my example is (20). I would like to select the row with an external numeric variable from 0 to 237. Thanks for the help,

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## [How to solve space in linux path](https://discourse.nodered.org/t/how-to-solve-space-in-linux-path/37946)

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**Author:** [@coen17st](https://discourse.nodered.org/u/coen17st)\
**Replies:** 12\
**Last updated:** [29 December 2020 14:37 UTC](https://discourse.nodered.org/t/how-to-solve-space-in-linux-path/37946 "2020-12-29T14:37:01Z")

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Hi, ik want to execute a rsync command but it doesn't work because there is a space in the path. this is source path /media/mediacenter/CANON XF2 this is the command. i have put this line in a template node rsync -vrh…

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## [How get a complete bool values from DB with Double Words?](https://discourse.nodered.org/t/how-get-a-complete-bool-values-from-db-with-double-words/38202)

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**Author:** [@Jotarod](https://discourse.nodered.org/u/Jotarod)\
**Replies:** 2\
**Last updated:** [29 December 2020 13:53 UTC](https://discourse.nodered.org/t/how-get-a-complete-bool-values-from-db-with-double-words/38202 "2020-12-29T13:53:29Z")

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Dear colleagues, I a have a DB with alarms that looks something more or less like this : Imagine that would like to get the values until the direction 99.7 . Of course, introduce one to one the dbx directions in the…

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## [Embedded - Functions for direct access to editor and runtime nodes](https://discourse.nodered.org/t/embedded-functions-for-direct-access-to-editor-and-runtime-nodes/38204)

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**Author:** [@scottpageindysoft](https://discourse.nodered.org/u/scottpageindysoft)\
**Replies:** 0\
**Last updated:** [29 December 2020 13:05 UTC](https://discourse.nodered.org/t/embedded-functions-for-direct-access-to-editor-and-runtime-nodes/38204 "2020-12-29T13:05:13Z")

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Having to use a callback function to access nodes doesn't make logical sense, especially in an embedded environment. I propose having two functions that I've been using for several years to overcome this shortfall. Dep…

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## [How does Node-RED compare to n8n.io?](https://discourse.nodered.org/t/how-does-node-red-compare-to-n8n-io/37297)

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**Author:** [@abitrolly](https://discourse.nodered.org/u/abitrolly)\
**Replies:** 8\
**Last updated:** [29 December 2020 11:40 UTC](https://discourse.nodered.org/t/how-does-node-red-compare-to-n8n-io/37297 "2020-12-29T11:40:55Z")

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I am a bit familiar with node graph editors for graphics and design, but have a little experience with such tools for automation. I found Node-RED and n8n that seem to be designed for this purpose and share a lot in comm…

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## [Elements won\`t hide/show by class name: oneditprepare](https://discourse.nodered.org/t/elements-won-t-hide-show-by-class-name-oneditprepare/38197)

<div class="topic-metadata">

**Author:** [@lizzardguki](https://discourse.nodered.org/u/lizzardguki)\
**Replies:** 2\
**Last updated:** [29 December 2020 11:30 UTC](https://discourse.nodered.org/t/elements-won-t-hide-show-by-class-name-oneditprepare/38197 "2020-12-29T11:30:40Z")

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So i started building some nodes after a couple of months, and with my small experience with it, I already came on an error. I have some elements in the node config (a couple of dropboxes/ and textboxes) that should sho…

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