# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=277

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

**Page:** 278

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## [How to set context variables containing spaces?](https://discourse.nodered.org/t/how-to-set-context-variables-containing-spaces/14576)

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**Author:** [@higbyk](https://discourse.nodered.org/u/higbyk)\
**Replies:** 22\
**Last updated:** [15 December 2022 10:49 UTC](https://discourse.nodered.org/t/how-to-set-context-variables-containing-spaces/14576 "2022-12-15T10:49:25Z")

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I know this isn't a huge deal and I could just use underscores, except that I'm positive I did this literally yesterday and now I've no idea how I accomplished it. I'm trying to create the property "heat index" in the g…

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## [Using flow variables in an mqtt topic](https://discourse.nodered.org/t/using-flow-variables-in-an-mqtt-topic/72238)

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**Author:** [@nelgin](https://discourse.nodered.org/u/nelgin)\
**Replies:** 7\
**Last updated:** [15 December 2022 10:03 UTC](https://discourse.nodered.org/t/using-flow-variables-in-an-mqtt-topic/72238 "2022-12-15T10:03:09Z")

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Hi all, I have a number of mqtt topic subscriptions in my flow that I push to a dashboard. Now, I want to replace ${QWKID} and ${BBSHOST} with flow variables. I setup a function to configure two flow variables, QWK…

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## [After upgrading to version 3 on Linux, Inject nodes disabled](https://discourse.nodered.org/t/after-upgrading-to-version-3-on-linux-inject-nodes-disabled/72177)

<div class="topic-metadata">

**Author:** [@Yusseiin](https://discourse.nodered.org/u/Yusseiin)\
**Replies:** 18\
**Last updated:** [15 December 2022 09:54 UTC](https://discourse.nodered.org/t/after-upgrading-to-version-3-on-linux-inject-nodes-disabled/72177 "2022-12-15T09:54:28Z")

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I have the same problem all inject and debug are greyed out. No start or stop button and no error on the log. I have tryed to write the timestamp on the dashboard and the value are changing so teh flow is working. n…

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## [Reformat json and remove array structure](https://discourse.nodered.org/t/reformat-json-and-remove-array-structure/72237)

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**Author:** [@th0maz](https://discourse.nodered.org/u/th0maz)\
**Replies:** 2\
**Last updated:** [15 December 2022 08:33 UTC](https://discourse.nodered.org/t/reformat-json-and-remove-array-structure/72237 "2022-12-15T08:33:23Z")

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Hi, I need some help with this. My Shelly 3EM with Tasmota sends status messages like this: { "Time": "2022-12-14T17:40:07", "ENERGY": { "Value1": 11, "Value2": 12, "Value3": 13, "Power": \[ 1693, 168, …

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## [Restart flow with button from dashboard](https://discourse.nodered.org/t/restart-flow-with-button-from-dashboard/70567)

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**Author:** [@Giacomo23](https://discourse.nodered.org/u/Giacomo23)\
**Replies:** 6\
**Last updated:** [15 December 2022 08:26 UTC](https://discourse.nodered.org/t/restart-flow-with-button-from-dashboard/70567 "2022-12-15T08:26:09Z")

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Hi everyone, I have a question how can I restart a flow through a button in the dashboard? thank you all

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## [Dashboard ui list switch enable](https://discourse.nodered.org/t/dashboard-ui-list-switch-enable/72196)

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**Author:** [@novski](https://discourse.nodered.org/u/novski)\
**Replies:** 1\
**Last updated:** [15 December 2022 01:26 UTC](https://discourse.nodered.org/t/dashboard-ui-list-switch-enable/72196 "2022-12-15T01:26:49Z")

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Can i disable the ui-list switch somehow?

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## [Rf remote with 4 buttons connected to a sonoff rfbridge flashed with tasmota](https://discourse.nodered.org/t/rf-remote-with-4-buttons-connected-to-a-sonoff-rfbridge-flashed-with-tasmota/72173)

<div class="topic-metadata">

**Author:** [@Reinier](https://discourse.nodered.org/u/Reinier)\
**Replies:** 3\
**Last updated:** [15 December 2022 01:23 UTC](https://discourse.nodered.org/t/rf-remote-with-4-buttons-connected-to-a-sonoff-rfbridge-flashed-with-tasmota/72173 "2022-12-15T01:23:53Z")

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Hi I am new to node-red, I made a flow to my 4-button remote and I want to switch a light on and off with button A, the flow works but it also works when I press button BCD, so it does not listen to the data message it l…

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## [How can i stop the delay Timer](https://discourse.nodered.org/t/how-can-i-stop-the-delay-timer/72213)

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**Author:** [@Marccore](https://discourse.nodered.org/u/Marccore)\
**Replies:** 4\
**Last updated:** [14 December 2022 23:50 UTC](https://discourse.nodered.org/t/how-can-i-stop-the-delay-timer/72213 "2022-12-14T23:50:29Z")

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Hello i have a Problem. How can i Stop a runnig Timer?

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## [Ethernet Ip communication protocol master / slave?](https://discourse.nodered.org/t/ethernet-ip-communication-protocol-master-slave/72201)

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**Author:** [@znetsixe](https://discourse.nodered.org/u/znetsixe)\
**Replies:** 10\
**Last updated:** [14 December 2022 22:32 UTC](https://discourse.nodered.org/t/ethernet-ip-communication-protocol-master-slave/72201 "2022-12-14T22:32:47Z")

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Let me start by saying : I am a very big fan of node-red and love its capabilities. I have started an R&D lab for functionality tests and am activally spreading the good word. Concerning my problem : For our R&D lab I …

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## [Serial out node - how to send break and idle instruction?](https://discourse.nodered.org/t/serial-out-node-how-to-send-break-and-idle-instruction/72075)

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**Author:** [@pablodaw](https://discourse.nodered.org/u/pablodaw)\
**Replies:** 9\
**Last updated:** [14 December 2022 22:16 UTC](https://discourse.nodered.org/t/serial-out-node-how-to-send-break-and-idle-instruction/72075 "2022-12-14T22:16:51Z")

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Hi. How can I send 88 usec break and 8 usec idle state before the main data frame, using node (e.g. Serial Out)?

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## [LAN devices and node-red in cloud](https://discourse.nodered.org/t/lan-devices-and-node-red-in-cloud/72218)

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**Author:** [@sirdnamai](https://discourse.nodered.org/u/sirdnamai)\
**Replies:** 3\
**Last updated:** [14 December 2022 21:07 UTC](https://discourse.nodered.org/t/lan-devices-and-node-red-in-cloud/72218 "2022-12-14T21:07:26Z")

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I have two instances of node-red running on: Webserver accessible on the Internet Raspberry Pi at home in LAN I would like to control my IoT devices I am currently doing from the local node-red instance from the onlin…

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## [Disable all - enable some - possible bug?](https://discourse.nodered.org/t/disable-all-enable-some-possible-bug/72105)

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**Author:** [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Replies:** 8\
**Last updated:** [14 December 2022 20:42 UTC](https://discourse.nodered.org/t/disable-all-enable-some-possible-bug/72105 "2022-12-14T20:42:22Z")

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I installed node-red-contrib-chatbot There are many nodes in this package. No nodes were added to flows at this stage yet. I disabled them all, they disappear from palette as expected. Enabled a couple of them - they…

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## [Change a $tring of letters to have a full stop and a space](https://discourse.nodered.org/t/change-a-tring-of-letters-to-have-a-full-stop-and-a-space/72191)

<div class="topic-metadata">

**Author:** [@Linhey](https://discourse.nodered.org/u/Linhey)\
**Replies:** 14\
**Last updated:** [14 December 2022 20:01 UTC](https://discourse.nodered.org/t/change-a-tring-of-letters-to-have-a-full-stop-and-a-space/72191 "2022-12-14T20:01:03Z")

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I am collecting some flight server data in Node Red and sending the data as a text string to Home Assistant to use with Google TTS speech. The issue I have is that the Callsign part is a string of letters such as RYR1234…

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## [Creating arrays in a function](https://discourse.nodered.org/t/creating-arrays-in-a-function/72212)

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**Author:** [@Nickdb](https://discourse.nodered.org/u/Nickdb)\
**Replies:** 3\
**Last updated:** [14 December 2022 17:57 UTC](https://discourse.nodered.org/t/creating-arrays-in-a-function/72212 "2022-12-14T17:57:48Z")

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Hi I’m newish so be gentle. I am struggling with a function that creates an array with msg.payload, having been initiated by injecting a random value (doesn’t matter what). Using the following: msg.payload\[0\] = 1; m…

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## [Bash command get stuck when trying to install node red in raspberrypi](https://discourse.nodered.org/t/bash-command-get-stuck-when-trying-to-install-node-red-in-raspberrypi/72003)

<div class="topic-metadata">

**Author:** [@AdilSultan](https://discourse.nodered.org/u/AdilSultan)\
**Replies:** 21\
**Last updated:** [14 December 2022 17:10 UTC](https://discourse.nodered.org/t/bash-command-get-stuck-when-trying-to-install-node-red-in-raspberrypi/72003 "2022-12-14T17:10:45Z")

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Hi, Using bash script to install node red in raspberrypi but script gets stuck and does nothing. bash \<(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodered) Used a…

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## [Where to post jobs](https://discourse.nodered.org/t/where-to-post-jobs/72205)

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**Author:** [@tpbillund](https://discourse.nodered.org/u/tpbillund)\
**Replies:** 1\
**Last updated:** [14 December 2022 16:46 UTC](https://discourse.nodered.org/t/where-to-post-jobs/72205 "2022-12-14T16:46:03Z")

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Hi All Can see the job section, but if it's a small flow job, that I want to pay fore, where do I then post it? Still in the job section, or do I just do it in general?

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## [Cannot start node-red after updating!](https://discourse.nodered.org/t/cannot-start-node-red-after-updating/72200)

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**Author:** [@Zorgo](https://discourse.nodered.org/u/Zorgo)\
**Replies:** 4\
**Last updated:** [14 December 2022 16:15 UTC](https://discourse.nodered.org/t/cannot-start-node-red-after-updating/72200 "2022-12-14T16:15:19Z")

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After updating node-red 3.01 to 3.02 and NodeJS V14 to V16 can't start node-red any more. nodered.service: Failed with result 'exit-code' Please help with troubleshooting. pi@raspberrypi:~ $ node-red-start Start Node…

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## [\[update\]Need help with CRC16](https://discourse.nodered.org/t/update-need-help-with-crc16/71891)

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**Author:** [@json\_lame](https://discourse.nodered.org/u/json_lame)\
**Replies:** 3\
**Last updated:** [9 December 2022 09:41 UTC](https://discourse.nodered.org/t/update-need-help-with-crc16/71891 "2022-12-09T09:41:56Z")

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Hi all Again I need your help :crazy\_face: I need to establish communication with some strange device, all I know that is communicating by TCP protocol. I already know that device react on this string: "GET 02210100F10…

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## [Getting error when adding modules to the Nodered flow](https://discourse.nodered.org/t/getting-error-when-adding-modules-to-the-nodered-flow/72164)

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**Author:** [@Vikas-Konaparthi](https://discourse.nodered.org/u/Vikas-Konaparthi)\
**Replies:** 1\
**Last updated:** [14 December 2022 10:53 UTC](https://discourse.nodered.org/t/getting-error-when-adding-modules-to-the-nodered-flow/72164 "2022-12-14T10:53:16Z")

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I am using nginx as reverse proxy for nodered flow but without nginx it is working fine but coming to the use of nginx in nodered docker logs when I add new plugins from palette it is showing TypeError: Cannot read prop…

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## [Node-Red contrib modbus messages after redeploy](https://discourse.nodered.org/t/node-red-contrib-modbus-messages-after-redeploy/72179)

<div class="topic-metadata">

**Author:** [@BVviktor](https://discourse.nodered.org/u/BVviktor)\
**Replies:** 0\
**Last updated:** [14 December 2022 10:13 UTC](https://discourse.nodered.org/t/node-red-contrib-modbus-messages-after-redeploy/72179 "2022-12-14T10:13:04Z")

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Hi everyone! I deployed my modbus read, write, response nodes and got the following messages: Do you have any idea what can be the problem? The modbus properties: Everything works fine afterwards. Thank you in…

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## [Upgrading to version 3 on windows, Inject nodes disabled](https://discourse.nodered.org/t/upgrading-to-version-3-on-windows-inject-nodes-disabled/68659)

<div class="topic-metadata">

**Author:** [@Nicky](https://discourse.nodered.org/u/Nicky)\
**Replies:** 10\
**Last updated:** [6 November 2022 16:45 UTC](https://discourse.nodered.org/t/upgrading-to-version-3-on-windows-inject-nodes-disabled/68659 "2022-11-06T16:45:49Z")

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Hi all, Since upgrading my node-red installation to version 3 my inject nodes all seem to be disabled and I cant enable them. They do inject if I set them to inject once after deployment. Any ideas or help would be …

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## [Transpose the Object/Array](https://discourse.nodered.org/t/transpose-the-object-array/72170)

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**Author:** [@smanjunath211](https://discourse.nodered.org/u/smanjunath211)\
**Replies:** 8\
**Last updated:** [14 December 2022 09:52 UTC](https://discourse.nodered.org/t/transpose-the-object-array/72170 "2022-12-14T09:52:17Z")

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Hi, I have an output from mysql query in this format, \[{"R":"Batch Preparation Delay","D":281},{"R":"Tea - Lunch Break","D":109},{"R":"Laminate Loading","D":58}\] i want the output to be changed to this format \[{"Batc…

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## [RBE/Filter node: definition of "last input value"](https://discourse.nodered.org/t/rbe-filter-node-definition-of-last-input-value/72115)

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**Author:** [@binderth](https://discourse.nodered.org/u/binderth)\
**Replies:** 6\
**Last updated:** [14 December 2022 09:18 UTC](https://discourse.nodered.org/t/rbe-filter-node-definition-of-last-input-value/72115 "2022-12-14T09:18:36Z")

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as described here I used the RBE/filter node to ignore values that have changed by \>25% since last input value. So question: "last input value" corresponding to the last accepted input value? or the very last input va…

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## [Simulate speeding in node red](https://discourse.nodered.org/t/simulate-speeding-in-node-red/72151)

<div class="topic-metadata">

**Author:** [@mai](https://discourse.nodered.org/u/mai)\
**Replies:** 4\
**Last updated:** [14 December 2022 09:40 UTC](https://discourse.nodered.org/t/simulate-speeding-in-node-red/72151 "2022-12-14T09:40:36Z")

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Hello, I was wondering if anyone has any idea how I can simulate speeding in node-red, like the data that can be collected through a laser speed gun or a radar... To put you in the situation, I need to generate this ki…

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## [Shelly 1PM Gen2 has no "mqtt\_update\_periode"?](https://discourse.nodered.org/t/shelly-1pm-gen2-has-no-mqtt-update-periode/72146)

<div class="topic-metadata">

**Author:** [@escapist3734](https://discourse.nodered.org/u/escapist3734)\
**Replies:** 10\
**Last updated:** [14 December 2022 09:10 UTC](https://discourse.nodered.org/t/shelly-1pm-gen2-has-no-mqtt-update-periode/72146 "2022-12-14T09:10:54Z")

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Hello! Question: Can I set the update interval for status message in shelly 1pm Gen2 like in Gen1? Additional infos: I've managed to implement my shelly 1pm into node-red. With the xx/status/switch:0 I get nearly ev…

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## [Soap contrig WSDL Config Error: Error: self signed certificate](https://discourse.nodered.org/t/soap-contrig-wsdl-config-error-error-self-signed-certificate/72136)

<div class="topic-metadata">

**Author:** [@stzue](https://discourse.nodered.org/u/stzue)\
**Replies:** 3\
**Last updated:** [14 December 2022 09:37 UTC](https://discourse.nodered.org/t/soap-contrig-wsdl-config-error-error-self-signed-certificate/72136 "2022-12-14T09:37:39Z")

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Hello Together i'm a newbie and working around with a soap request no i got a problem when i ask the server some informations then is a WSDL Config Error: Error: self signed certificate error could anyone direct mi to …

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## [Where did the junction nodes go?](https://discourse.nodered.org/t/where-did-the-junction-nodes-go/72153)

<div class="topic-metadata">

**Author:** [@Frida](https://discourse.nodered.org/u/Frida)\
**Replies:** 5\
**Last updated:** [14 December 2022 08:47 UTC](https://discourse.nodered.org/t/where-did-the-junction-nodes-go/72153 "2022-12-14T08:47:32Z")

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On a mac with safari and 2 rpi's. When I copy a flow from one rpi to another. When I copy a flow with cmd e, current flow, my junction nodes are not included. When I use cmd a e, selected nodes, my junction nodes ar…

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## [Change Color in a text out node](https://discourse.nodered.org/t/change-color-in-a-text-out-node/72166)

<div class="topic-metadata">

**Author:** [@Damrak2022](https://discourse.nodered.org/u/Damrak2022)\
**Replies:** 1\
**Last updated:** [14 December 2022 06:54 UTC](https://discourse.nodered.org/t/change-color-in-a-text-out-node/72166 "2022-12-14T06:54:35Z")

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Hello, everyone, Since my English is unfortunately not so good anymore, I prefer to use Google Translator to formulate my question here. I'm looking for a simple way to change either the background color or the font co…

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## [Sending data from UI Template (Tabulator Table) to Chart](https://discourse.nodered.org/t/sending-data-from-ui-template-tabulator-table-to-chart/72162)

<div class="topic-metadata">

**Author:** [@interscope101](https://discourse.nodered.org/u/interscope101)\
**Replies:** 0\
**Last updated:** [14 December 2022 05:12 UTC](https://discourse.nodered.org/t/sending-data-from-ui-template-tabulator-table-to-chart/72162 "2022-12-14T05:12:03Z")

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Hi, I have Tabulator Table in a UI Template and need to send data out to render a bar chart. Right now I am just trying to get the data flow working. I have a button in the column header that pops up a menu with a "ch…

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## [JSONata: $replace & /regex/](https://discourse.nodered.org/t/jsonata-replace-regex/72076)

<div class="topic-metadata">

**Author:** [@danielbrunt57](https://discourse.nodered.org/u/danielbrunt57)\
**Replies:** 1\
**Last updated:** [14 December 2022 01:45 UTC](https://discourse.nodered.org/t/jsonata-replace-regex/72076 "2022-12-14T01:45:27Z")

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I have this regex in Home Assistant that I want to replicate in NR via JSONata: regex\_replace(find="^\[0:\]\*",replace="") It replaces leading 0's or :'s until no match, with null. I have this so far which doesn't comple…

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