# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=161

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

**Page:** 162

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## [Polling error on node-red-contrib-telegram-bot](https://discourse.nodered.org/t/polling-error-on-node-red-contrib-telegram-bot/82686)

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**Author:** [@mildly2late](https://discourse.nodered.org/u/mildly2late)\
**Replies:** 3\
**Last updated:** [8 November 2023 09:13 UTC](https://discourse.nodered.org/t/polling-error-on-node-red-contrib-telegram-bot/82686 "2023-11-08T09:13:46Z")

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Hi i'm encountering this strange polling error, ive used this package for many other projects but only encountering it now. its the only instance of node-red running in the network.

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## [Running script from exec node error](https://discourse.nodered.org/t/running-script-from-exec-node-error/82696)

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**Author:** [@rafterkai](https://discourse.nodered.org/u/rafterkai)\
**Replies:** 5\
**Last updated:** [7 November 2023 22:44 UTC](https://discourse.nodered.org/t/running-script-from-exec-node-error/82696 "2023-11-07T22:44:09Z")

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I have made a script to print pdf files to a network printer using pdf-to-printer. When I run the script directly in the command prompt, it works fine but when I try to run the same command from inside node red using the…

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## [Cronplus Sunset](https://discourse.nodered.org/t/cronplus-sunset/82621)

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**Author:** [@xytsrm](https://discourse.nodered.org/u/xytsrm)\
**Replies:** 61\
**Last updated:** [7 November 2023 21:27 UTC](https://discourse.nodered.org/t/cronplus-sunset/82621 "2023-11-07T21:27:10Z")

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I don't have experience with cronplus; however I've created a test flow that outputs at specific times that works without issue. The issue I'm seeing is "Sunset"; after setting my timezone I set a schedule for Sunset. Af…

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## [Persistent Context Set Previous Value](https://discourse.nodered.org/t/persistent-context-set-previous-value/82697)

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**Author:** [@PuckeyP](https://discourse.nodered.org/u/PuckeyP)\
**Replies:** 2\
**Last updated:** [7 November 2023 20:05 UTC](https://discourse.nodered.org/t/persistent-context-set-previous-value/82697 "2023-11-07T20:05:35Z")

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Hi All, Question: Is it possible to set previous value for a global value, or should I just send two values pushing the first one to the previous value state Thx PPee

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## [Node-red-contrib-pid components values](https://discourse.nodered.org/t/node-red-contrib-pid-components-values/82688)

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**Author:** [@avk999](https://discourse.nodered.org/u/avk999)\
**Replies:** 5\
**Last updated:** [7 November 2023 19:02 UTC](https://discourse.nodered.org/t/node-red-contrib-pid-components-values/82688 "2023-11-07T19:02:58Z")

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I use node-red-contrib-pid module by colinl and while the node itself works fine the output values of the P,I,D components do not make much sense. When the temperature (PV) is lower than the setpoint the P component is n…

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## [Multiple Line Chart](https://discourse.nodered.org/t/multiple-line-chart/82662)

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**Author:** [@Walder](https://discourse.nodered.org/u/Walder)\
**Replies:** 6\
**Last updated:** [7 November 2023 17:46 UTC](https://discourse.nodered.org/t/multiple-line-chart/82662 "2023-11-07T17:46:48Z")

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I am looking for a line chart for 4 different inputs does someone has a code that is already written ? It would save me lot of work

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## [Hold the signal ever for min. 5 seonds before changing](https://discourse.nodered.org/t/hold-the-signal-ever-for-min-5-seonds-before-changing/82689)

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**Author:** [@Herbert](https://discourse.nodered.org/u/Herbert)\
**Replies:** 2\
**Last updated:** [7 November 2023 15:54 UTC](https://discourse.nodered.org/t/hold-the-signal-ever-for-min-5-seonds-before-changing/82689 "2023-11-07T15:54:46Z")

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Hello, I have a problem with a signal, which aktivates a relay over a GPIO pin. In some cases the relay is ON for some month, in other cases there is a change from ON to OFF in 250ms. This quick changes destroy my devi…

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## [Changing a Comment-Node name via Function-Node code](https://discourse.nodered.org/t/changing-a-comment-node-name-via-function-node-code/82632)

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**Author:** [@xytsrm](https://discourse.nodered.org/u/xytsrm)\
**Replies:** 10\
**Last updated:** [7 November 2023 14:48 UTC](https://discourse.nodered.org/t/changing-a-comment-node-name-via-function-node-code/82632 "2023-11-07T14:48:12Z")

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Is there a way to address a specific Comment-node via a Function-Node code to alter it's name? X I think I know the the answer; and it's NO.; one can only change the "status".

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## [Change of variable name](https://discourse.nodered.org/t/change-of-variable-name/82654)

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**Author:** [@Wolfe](https://discourse.nodered.org/u/Wolfe)\
**Replies:** 3\
**Last updated:** [6 November 2023 16:30 UTC](https://discourse.nodered.org/t/change-of-variable-name/82654 "2023-11-06T16:30:46Z")

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I got stucked! I use a TopicJson payload: {"220":"0","XXX":"255","SOC":"98.8","SOH":"82","B-T":"18.14","M-T":"23","Tun":"","kWh":"4.9","Amp":"-0","RPM":"470","Nm ":"-1","FW ":"","C01":"4.11","C02":"4.11","C03":"4.11","…

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## [Ewelink? Dead in the water?](https://discourse.nodered.org/t/ewelink-dead-in-the-water/82680)

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**Author:** [@richiep](https://discourse.nodered.org/u/richiep)\
**Replies:** 3\
**Last updated:** [7 November 2023 12:47 UTC](https://discourse.nodered.org/t/ewelink-dead-in-the-water/82680 "2023-11-07T12:47:36Z")

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Hey All, Sonoff/ewelink changed their API a few months back and since then the ewelink node no longer works. As far as I know the project has been abandon by the developer. Is this dead in the water? Are my sonoff de…

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## [Determining Flow ID for the Editor to render flows in iframe](https://discourse.nodered.org/t/determining-flow-id-for-the-editor-to-render-flows-in-iframe/82677)

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**Author:** [@Shan](https://discourse.nodered.org/u/Shan)\
**Replies:** 5\
**Last updated:** [7 November 2023 11:34 UTC](https://discourse.nodered.org/t/determining-flow-id-for-the-editor-to-render-flows-in-iframe/82677 "2023-11-07T11:34:33Z")

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Hi, I have been able to embed the nodered editor in a react application using iframe and overcome the cross-origin problems by serving the UI behind a reverse proxy. In order to preserve the state of the flows to be ren…

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## [Very simple virtual keyboard](https://discourse.nodered.org/t/very-simple-virtual-keyboard/82412)

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**Author:** [@jttjtt](https://discourse.nodered.org/u/jttjtt)\
**Replies:** 7\
**Last updated:** [7 November 2023 11:31 UTC](https://discourse.nodered.org/t/very-simple-virtual-keyboard/82412 "2023-11-07T11:31:36Z")

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I am programming a simple aplication for parking lot, where I need the user to write car plate number. So i was searching for a very simple on-screen keyboard, where will be English Letters, Numbers, maybe space bar and…

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## [Nodered workspace freezes when placeholder node appears when only custom nodes are enabled](https://discourse.nodered.org/t/nodered-workspace-freezes-when-placeholder-node-appears-when-only-custom-nodes-are-enabled/82550)

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**Author:** [@chiru](https://discourse.nodered.org/u/chiru)\
**Replies:** 23\
**Last updated:** [7 November 2023 09:26 UTC](https://discourse.nodered.org/t/nodered-workspace-freezes-when-placeholder-node-appears-when-only-custom-nodes-are-enabled/82550 "2023-11-07T09:26:08Z")

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Hello, When I press on the output port of a node and drag and stop on the workspace, a placeholder node appears. Along with that a search bar and list of nodes appear as below. In the list my custom nodes names also app…

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## [Switch function node dont have add rule button](https://discourse.nodered.org/t/switch-function-node-dont-have-add-rule-button/82676)

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**Author:** [@JavaChiips](https://discourse.nodered.org/u/JavaChiips)\
**Replies:** 1\
**Last updated:** [7 November 2023 09:42 UTC](https://discourse.nodered.org/t/switch-function-node-dont-have-add-rule-button/82676 "2023-11-07T09:42:12Z")

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I currently working on the switch function node. But my switch node does not have add rule button which it should have. Below is the node edit window: Which it suppose to be like below:

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## [Problem to replace a JSON object in Array](https://discourse.nodered.org/t/problem-to-replace-a-json-object-in-array/82658)

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**Author:** [@JeromeVISUALS](https://discourse.nodered.org/u/JeromeVISUALS)\
**Replies:** 7\
**Last updated:** [7 November 2023 08:12 UTC](https://discourse.nodered.org/t/problem-to-replace-a-json-object-in-array/82658 "2023-11-07T08:12:51Z")

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Hi , I have a question which might be more related to JS than Node Red..... I'm trying to replace a JSON object in a Array but can't get it work. Each time the new data replaced in the array is a string, but not an obje…

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## [How many sensors can the Node-RED platform support for access?](https://discourse.nodered.org/t/how-many-sensors-can-the-node-red-platform-support-for-access/82638)

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**Author:** [@Tracy](https://discourse.nodered.org/u/Tracy)\
**Replies:** 8\
**Last updated:** [7 November 2023 00:55 UTC](https://discourse.nodered.org/t/how-many-sensors-can-the-node-red-platform-support-for-access/82638 "2023-11-07T00:55:20Z")

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Node-RED is useful.How many sensors can the Node-RED platform support for access?

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## [At node red Can you integrate it?](https://discourse.nodered.org/t/at-node-red-can-you-integrate-it/82564)

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**Author:** [@Tomi](https://discourse.nodered.org/u/Tomi)\
**Replies:** 5\
**Last updated:** [6 November 2023 23:35 UTC](https://discourse.nodered.org/t/at-node-red-can-you-integrate-it/82564 "2023-11-06T23:35:13Z")

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I want to install a switch in node red Because of the flow Can't install Can you integrate it?

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## [Uibuilder App Vue work fine in Firefox but not in Chrome](https://discourse.nodered.org/t/uibuilder-app-vue-work-fine-in-firefox-but-not-in-chrome/82578)

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**Author:** [@serinmo](https://discourse.nodered.org/u/serinmo)\
**Replies:** 7\
**Last updated:** [6 November 2023 19:48 UTC](https://discourse.nodered.org/t/uibuilder-app-vue-work-fine-in-firefox-but-not-in-chrome/82578 "2023-11-06T19:48:00Z")

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Hi, I've a app vue to dynamic change a svg fill colors that work fine in Firefox but in Chrome it doesn't work: websocket.js:121 WebSocket connection to 'ws://-----------------.es:1881/uibuilder/vendor/socket.io/?EIO=4&…

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## [Jira Node: Invalid JQL](https://discourse.nodered.org/t/jira-node-invalid-jql/82657)

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**Author:** [@Pinky](https://discourse.nodered.org/u/Pinky)\
**Replies:** 0\
**Last updated:** [6 November 2023 15:12 UTC](https://discourse.nodered.org/t/jira-node-invalid-jql/82657 "2023-11-06T15:12:16Z")

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Hi everyone, I installed red-contrib-jira-jql to request some amounts of Jira-Tickets in my board. My goal is, to receive the amount of Tickets that match a special JQL. After installing however I entered my credential…

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## [Appeal for aid Cut special characters](https://discourse.nodered.org/t/appeal-for-aid-cut-special-characters/82642)

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**Author:** [@suwan.a](https://discourse.nodered.org/u/suwan.a)\
**Replies:** 3\
**Last updated:** [6 November 2023 13:36 UTC](https://discourse.nodered.org/t/appeal-for-aid-cut-special-characters/82642 "2023-11-06T13:36:16Z")

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"\[\["M","O","2","3"\],\["1","2","3","4"\],\["5","6","7","8"\]\]" To MO2312345678 Must use function?

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## [Project management examples](https://discourse.nodered.org/t/project-management-examples/82627)

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**Author:** [@Safouene28](https://discourse.nodered.org/u/Safouene28)\
**Replies:** 4\
**Last updated:** [6 November 2023 10:48 UTC](https://discourse.nodered.org/t/project-management-examples/82627 "2023-11-06T10:48:14Z")

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Hi , Has anyone worked with node red to create a project management tool? I want to see some examples please and have an Idea. Thanks.:pray:

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## [Zwave program dashboard](https://discourse.nodered.org/t/zwave-program-dashboard/82583)

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**Author:** [@daak](https://discourse.nodered.org/u/daak)\
**Replies:** 4\
**Last updated:** [6 November 2023 10:08 UTC](https://discourse.nodered.org/t/zwave-program-dashboard/82583 "2023-11-06T10:08:13Z")

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Hello, I copied and pasted my z wave program to control air conditioners from one raspberry to another except that on the copied program I can no longer change the functions on the dashboard. they stay stuck on off …

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## [I'm after (I think anyway) a rate limited gate](https://discourse.nodered.org/t/im-after-i-think-anyway-a-rate-limited-gate/82615)

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**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 33\
**Last updated:** [6 November 2023 09:33 UTC](https://discourse.nodered.org/t/im-after-i-think-anyway-a-rate-limited-gate/82615 "2023-11-06T09:33:58Z")

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So end result required Messages arrive and I want them rate limited (at least 1/sec) to give upstream nodes a chance to deal with them But I want the messages to be gated, so that if upstream nodes take 2s - the next m…

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## [How to display data below the entity?](https://discourse.nodered.org/t/how-to-display-data-below-the-entity/82644)

<div class="topic-metadata">

**Author:** [@falci](https://discourse.nodered.org/u/falci)\
**Replies:** 3\
**Last updated:** [6 November 2023 09:43 UTC](https://discourse.nodered.org/t/how-to-display-data-below-the-entity/82644 "2023-11-06T09:43:37Z")

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Note this ":green\_square: sunny" under the weather node. Is it possible to add this kind of log/info below the function node?

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## [Pi bookworm experience](https://discourse.nodered.org/t/pi-bookworm-experience/82414)

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**Author:** [@gerry](https://discourse.nodered.org/u/gerry)\
**Replies:** 9\
**Last updated:** [6 November 2023 06:21 UTC](https://discourse.nodered.org/t/pi-bookworm-experience/82414 "2023-11-06T06:21:49Z")

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Anyone running the new pi bookworm OS with node red yet? Observations?

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## [JSON to XML correct syntax](https://discourse.nodered.org/t/json-to-xml-correct-syntax/82630)

<div class="topic-metadata">

**Author:** [@jttjtt](https://discourse.nodered.org/u/jttjtt)\
**Replies:** 7\
**Last updated:** [6 November 2023 08:48 UTC](https://discourse.nodered.org/t/json-to-xml-correct-syntax/82630 "2023-11-06T08:48:53Z")

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I am using XML node to make XML file from JSON input. If i make this JSON: { "Label": { "$": { "Key": "Unique1" }, "\_": "Test" } } I get this XML: \<?xml version="1.0" encod…

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## [Converting formats](https://discourse.nodered.org/t/converting-formats/82626)

<div class="topic-metadata">

**Author:** [@Xenos](https://discourse.nodered.org/u/Xenos)\
**Replies:** 5\
**Last updated:** [6 November 2023 02:14 UTC](https://discourse.nodered.org/t/converting-formats/82626 "2023-11-06T02:14:26Z")

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I'm not sure if I should be converting from a string to a number or just stripping out some characters. Any help would be greatly appreciated .

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## [Hello \*To function node Please tell me how to read 485 serial data\*](https://discourse.nodered.org/t/hello-to-function-node-please-tell-me-how-to-read-485-serial-data/82634)

<div class="topic-metadata">

**Author:** [@ShinDongHen](https://discourse.nodered.org/u/ShinDongHen)\
**Replies:** 0\
**Last updated:** [6 November 2023 01:24 UTC](https://discourse.nodered.org/t/hello-to-function-node-please-tell-me-how-to-read-485-serial-data/82634 "2023-11-06T01:24:31Z")

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hello id 3 as function node hex 03 03 00 01 00 10 I will attach a photo of the manual. Function JavaScript is msg.payload = { 'fc': 3, 'unitid': 3; 'address': 0x0001, 'quantity': 0x0010, }; return msg; What I …

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## [Data from nodes in a flow](https://discourse.nodered.org/t/data-from-nodes-in-a-flow/82633)

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**Author:** [@Tomi](https://discourse.nodered.org/u/Tomi)\
**Replies:** 2\
**Last updated:** [6 November 2023 00:59 UTC](https://discourse.nodered.org/t/data-from-nodes-in-a-flow/82633 "2023-11-06T00:59:06Z")

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Hello I am using a translator Can I receive data from a node in one flow from multiple flows?

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## [Problem with CSV import data parsing](https://discourse.nodered.org/t/problem-with-csv-import-data-parsing/82625)

<div class="topic-metadata">

**Author:** [@JeromeVISUALS](https://discourse.nodered.org/u/JeromeVISUALS)\
**Replies:** 12\
**Last updated:** [5 November 2023 23:36 UTC](https://discourse.nodered.org/t/problem-with-csv-import-data-parsing/82625 "2023-11-05T23:36:25Z")

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Hi there ! I have a small problem with CSV data in Node RED. The CSV imported includes some fields like : ;{};{"desc":"blabla","label":""};\[\]; When I import this and stores in a global Var, I get this : On of cou…

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