# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=612

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**Page:** 613

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## [This is another error I am seeing on a different machine](https://discourse.nodered.org/t/this-is-another-error-i-am-seeing-on-a-different-machine/39988)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 20\
**Last updated:** [30 January 2021 21:56 UTC](https://discourse.nodered.org/t/this-is-another-error-i-am-seeing-on-a-different-machine/39988 "2021-01-30T21:56:43Z")

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This is an interesting error I am seeing. Where 89c38d55.164f48 What Key in object structure must evaluate to a string; got: undefined Ok, the node mentioned: This is the node's code: \[{"id":"89c38d55.164f48","type…

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## [Worldmap ui - Remember Icons](https://discourse.nodered.org/t/worldmap-ui-remember-icons/40070)

<div class="topic-metadata">

**Author:** [@ScheepersJohan](https://discourse.nodered.org/u/ScheepersJohan)\
**Replies:** 2\
**Last updated:** [30 January 2021 21:43 UTC](https://discourse.nodered.org/t/worldmap-ui-remember-icons/40070 "2021-01-30T21:43:33Z")

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Hi, I have a word Map with several icons plotted on it, when I navigated to another tab and back the icons disappear. Are their a way to "remember" them? Thanks

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## [If a value is false for x time](https://discourse.nodered.org/t/if-a-value-is-false-for-x-time/40020)

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**Author:** [@calberts](https://discourse.nodered.org/u/calberts)\
**Replies:** 6\
**Last updated:** [30 January 2021 21:16 UTC](https://discourse.nodered.org/t/if-a-value-is-false-for-x-time/40020 "2021-01-30T21:16:32Z")

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Gents i need some help i tried thorthel (count and Time) and trigger but i dd get it done. i need de following i measure the internet with ping. when the internet is not there a false is send. the ping is every 60sec. …

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## [Query WEB pages from PoE switch](https://discourse.nodered.org/t/query-web-pages-from-poe-switch/40014)

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**Author:** [@myWa](https://discourse.nodered.org/u/myWa)\
**Replies:** 8\
**Last updated:** [30 January 2021 20:46 UTC](https://discourse.nodered.org/t/query-web-pages-from-poe-switch/40014 "2021-01-30T20:46:12Z")

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Hello forum, good evening. I'm new here and have a question about "querying" web pages from IOT devices. I use a PoE switch from Microsens (MS450), which shows me the performance of the respective PoE ports. I would li…

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## [Splitting msg.payload from serial device](https://discourse.nodered.org/t/splitting-msg-payload-from-serial-device/40049)

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**Author:** [@nick](https://discourse.nodered.org/u/nick)\
**Replies:** 2\
**Last updated:** [30 January 2021 20:41 UTC](https://discourse.nodered.org/t/splitting-msg-payload-from-serial-device/40049 "2021-01-30T20:41:42Z")

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Dear all, i was able to set up serial communication between my arduino (Wemos D1) and my RBP that runs node red. sow i am able to read out the values that are sent by the arduino into my node red. but i dont know how …

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## [Hello, Two sliders to one payload (clock time)](https://discourse.nodered.org/t/hello-two-sliders-to-one-payload-clock-time/40063)

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**Author:** [@lassiv](https://discourse.nodered.org/u/lassiv)\
**Replies:** 6\
**Last updated:** [30 January 2021 19:37 UTC](https://discourse.nodered.org/t/hello-two-sliders-to-one-payload-clock-time/40063 "2021-01-30T19:37:43Z")

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Hi all Here ony question. I try to get my sliders to work with my node red flow, but not get that working perfectly. Here is my flow: Blockquote \[{"id":"bfff0ca.6ef8bf","type":"tab","label":"Autolämmitys","disabled"…

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## [Add global options dynamically to ui-dropdown](https://discourse.nodered.org/t/add-global-options-dynamically-to-ui-dropdown/7923)

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**Author:** [@hathemi](https://discourse.nodered.org/u/hathemi)\
**Replies:** 8\
**Last updated:** [30 January 2021 19:23 UTC](https://discourse.nodered.org/t/add-global-options-dynamically-to-ui-dropdown/7923 "2021-01-30T19:23:16Z")

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i have a button in case i want to add other option to dropdown in my dashboard. is there a possible way to add global options dynamically to ui-dropdown ??? thanks in advance.

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## [\[solved\] Set property value from flow variable using jsonata](https://discourse.nodered.org/t/solved-set-property-value-from-flow-variable-using-jsonata/40064)

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**Author:** [@danielo515](https://discourse.nodered.org/u/danielo515)\
**Replies:** 5\
**Last updated:** [30 January 2021 19:16 UTC](https://discourse.nodered.org/t/solved-set-property-value-from-flow-variable-using-jsonata/40064 "2021-01-30T19:16:37Z")

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Hello. I'm trying to use the node change to set a property of the payload to a calculation using a flow context variable. I don't get any error, but I don't get any value either. Is this not supported or what? Didn't f…

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## [Set delay with slider](https://discourse.nodered.org/t/set-delay-with-slider/40021)

<div class="topic-metadata">

**Author:** [@goebelino](https://discourse.nodered.org/u/goebelino)\
**Replies:** 7\
**Last updated:** [30 January 2021 17:39 UTC](https://discourse.nodered.org/t/set-delay-with-slider/40021 "2021-01-30T17:39:47Z")

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Hello everyone, I tried multiple nodes to get this idea done, but nothing works (delay, eztimer, timer switch...). I need something like a loop with a start/stop function. One button start and stop, or a toggle switch t…

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## [Updating dependency of an installed node](https://discourse.nodered.org/t/updating-dependency-of-an-installed-node/40046)

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**Author:** [@AleksCee](https://discourse.nodered.org/u/AleksCee)\
**Replies:** 5\
**Last updated:** [30 January 2021 16:15 UTC](https://discourse.nodered.org/t/updating-dependency-of-an-installed-node/40046 "2021-01-30T16:15:22Z")

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Hello, is there a way to change only the dependency of one package without fork, reinstall, reconfigure the complete node? Reason: https://github.com/586837r/node-red-contrib-alexa-remote2/issues/191#issuecomment-770102…

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## [Trying to refer to parts in an array without undefined error?](https://discourse.nodered.org/t/trying-to-refer-to-parts-in-an-array-without-undefined-error/40051)

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**Author:** [@edwardr](https://discourse.nodered.org/u/edwardr)\
**Replies:** 3\
**Last updated:** [30 January 2021 15:52 UTC](https://discourse.nodered.org/t/trying-to-refer-to-parts-in-an-array-without-undefined-error/40051 "2021-01-30T15:52:15Z")

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Hello folks, Coming across a problem I can\`t get around, I thought to address the point in a payload it would be msg.payload.data\[ "Number of which you want"\] But it doesnt work ? If I was wanting to address each va…

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## [EADDRINUSE error](https://discourse.nodered.org/t/eaddrinuse-error/5192)

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**Author:** [@salas81](https://discourse.nodered.org/u/salas81)\
**Replies:** 19\
**Last updated:** [30 January 2021 15:44 UTC](https://discourse.nodered.org/t/eaddrinuse-error/5192 "2021-01-30T15:44:02Z")

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Hi, I'm trying to launch wore-red from terminal but this is the error I get 25 Nov 17:24:18 - \[info\] Welcome to Node-RED 25 Nov 17:24:18 - \[info\] Node-RED version: v0.19.4 25 Nov 17:24:18 - \[info\] Node.js version: v8…

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## [Telegram add Chart](https://discourse.nodered.org/t/telegram-add-chart/40037)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 4\
**Last updated:** [30 January 2021 15:08 UTC](https://discourse.nodered.org/t/telegram-add-chart/40037 "2021-01-30T15:08:09Z")

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Hello i have this working Telegram sending! all Fine! But i have crated this Graph/Chart too and would like to add it too to my telegram Message! Is something like that possible? i do use the node-red-contrib-tele…

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## [The use of JSONata](https://discourse.nodered.org/t/the-use-of-jsonata/37692)

<div class="topic-metadata">

**Author:** [@nileio](https://discourse.nodered.org/u/nileio)\
**Replies:** 14\
**Last updated:** [30 January 2021 14:49 UTC](https://discourse.nodered.org/t/the-use-of-jsonata/37692 "2021-01-30T14:49:30Z")

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Hi everyone, I am keen to know about your experience using Jsonata with Node-RED. I read the documentation back to front many times and since JSON manipulations is a must, I learned it only to use with Node-RED.. it is…

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## [Splitting msg payload fields](https://discourse.nodered.org/t/splitting-msg-payload-fields/40042)

<div class="topic-metadata">

**Author:** [@ScheepersJohan](https://discourse.nodered.org/u/ScheepersJohan)\
**Replies:** 2\
**Last updated:** [30 January 2021 12:30 UTC](https://discourse.nodered.org/t/splitting-msg-payload-fields/40042 "2021-01-30T12:30:25Z")

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I have a incoming message of Now I need two messages out and they need to look like this First one msg.payload.app\_id: "s\*\*\*\*1" msg.payload.payload\_fields.temperature: "27.9" msg.payload.metadata.time: "2021-01-30…

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## [Compare inside temp to outside](https://discourse.nodered.org/t/compare-inside-temp-to-outside/936)

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**Author:** [@nmatt25](https://discourse.nodered.org/u/nmatt25)\
**Replies:** 24\
**Last updated:** [30 January 2021 10:43 UTC](https://discourse.nodered.org/t/compare-inside-temp-to-outside/936 "2021-01-30T10:43:22Z")

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Let me start by saying that I am very new to node red but not to home automation. I have been using smartthings for the past 2 years but have recently started build my new system (home assistant) for the sole reason of w…

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## [Setting up a secure connection](https://discourse.nodered.org/t/setting-up-a-secure-connection/40026)

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**Author:** [@prf](https://discourse.nodered.org/u/prf)\
**Replies:** 6\
**Last updated:** [30 January 2021 09:32 UTC](https://discourse.nodered.org/t/setting-up-a-secure-connection/40026 "2021-01-30T09:32:43Z")

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I've only been experimenting with Node-red for a couple of days. I'm warned that my connection is unsecured and so I've read the documentation that deals with enabling HTTPS access. Quoting from the documentation: As a …

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## [Matches Regex SwitchNode](https://discourse.nodered.org/t/matches-regex-switchnode/40035)

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**Author:** [@nicedevil](https://discourse.nodered.org/u/nicedevil)\
**Replies:** 6\
**Last updated:** [30 January 2021 09:09 UTC](https://discourse.nodered.org/t/matches-regex-switchnode/40035 "2021-01-30T09:09:06Z")

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Heya, found this great snipped here in Node-RED Forum There was explained on how to get a message checked for its string. But in this case it must be exactly the right string, what do I have to do if I have to check if …

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## [Is there a universal update script/command?](https://discourse.nodered.org/t/is-there-a-universal-update-script-command/39985)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 5\
**Last updated:** [29 January 2021 22:35 UTC](https://discourse.nodered.org/t/is-there-a-universal-update-script-command/39985 "2021-01-29T22:35:13Z")

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If I want to update NR on my RasPi, I use this command: bash \<(curl -sL https://raw.githubusercontent.com/node-red/raspbian-deb-package/master/resources/update-nodejs-and-nodered) and it works. But it doesn't work for…

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## [InfluxDB | Delete measurement information between to times](https://discourse.nodered.org/t/influxdb-delete-measurement-information-between-to-times/40010)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 4\
**Last updated:** [29 January 2021 22:03 UTC](https://discourse.nodered.org/t/influxdb-delete-measurement-information-between-to-times/40010 "2021-01-29T22:03:51Z")

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Hello I need to delet some datas in a measurement I know the measurement is in Egolzwil need to delete all information in Egolzwil from the 2021-01-28 23:36:30 till 2021-01-29 16:56:30 how to do this correct way? h…

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## [Sensor Data much to high](https://discourse.nodered.org/t/sensor-data-much-to-high/39984)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 5\
**Last updated:** [29 January 2021 20:44 UTC](https://discourse.nodered.org/t/sensor-data-much-to-high/39984 "2021-01-29T20:44:37Z")

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Hello i grab some temperature sensor from a weather station. Now something is wrong there and i got temperature over 8000C it musst be like a sun this Station. Is there a way to ignore this wrong Data befor added to t…

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## [Noob JSON issues](https://discourse.nodered.org/t/noob-json-issues/39771)

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**Author:** [@lorenjz](https://discourse.nodered.org/u/lorenjz)\
**Replies:** 3\
**Last updated:** [29 January 2021 19:34 UTC](https://discourse.nodered.org/t/noob-json-issues/39771 "2021-01-29T19:34:58Z")

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The following JSON is passed to Node-RED from a traccar server: {"event":{"id":683,"attributes":{},"deviceId":1,"type":"deviceUnknown","serverTime":"2021-01-26T03:31:58.515+0000","positionId":0,"geofenceId":0,"maintenan…

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## [How do you DELETE a subflow?](https://discourse.nodered.org/t/how-do-you-delete-a-subflow/3542)

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**Author:** [@SteveMann](https://discourse.nodered.org/u/SteveMann)\
**Replies:** 3\
**Last updated:** [29 January 2021 14:44 UTC](https://discourse.nodered.org/t/how-do-you-delete-a-subflow/3542 "2021-01-29T14:44:45Z")

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I have some flows that are getting pretty crowded. (I didn't know there was a height limit to the flow screen). So, I decided it's time to use subflows to clean up the various tabs. But, now I have a couple of test su…

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## [Trigger periodically a value to database](https://discourse.nodered.org/t/trigger-periodically-a-value-to-database/39798)

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**Author:** [@Becker](https://discourse.nodered.org/u/Becker)\
**Replies:** 6\
**Last updated:** [29 January 2021 13:53 UTC](https://discourse.nodered.org/t/trigger-periodically-a-value-to-database/39798 "2021-01-29T13:53:10Z")

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Hi ! is it possible to trigger a value every day at 0:00h and write it to influxdb ? this are the values from the integrated heat meter of my heat pump. I would like to build the consumption of every month / year. J…

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## [Activate a gpio using siri's voice commands remotely (via shortcut)](https://discourse.nodered.org/t/activate-a-gpio-using-siris-voice-commands-remotely-via-shortcut/39904)

<div class="topic-metadata">

**Author:** [@fzr91](https://discourse.nodered.org/u/fzr91)\
**Replies:** 9\
**Last updated:** [29 January 2021 10:09 UTC](https://discourse.nodered.org/t/activate-a-gpio-using-siris-voice-commands-remotely-via-shortcut/39904 "2021-01-29T10:09:56Z")

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Hi, After removing the account on apple tv 3 I can no longer use it as a hub (i tried to reinstall the account several times) so i can't remotely use the siri shortcuts to give voice commands to the raspberry, there is a…

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## [Delete in-use subflow doesn't warn, and how to find subflow uses](https://discourse.nodered.org/t/delete-in-use-subflow-doesnt-warn-and-how-to-find-subflow-uses/39793)

<div class="topic-metadata">

**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\
**Replies:** 8\
**Last updated:** [29 January 2021 10:09 UTC](https://discourse.nodered.org/t/delete-in-use-subflow-doesnt-warn-and-how-to-find-subflow-uses/39793 "2021-01-29T10:09:12Z")

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Two related issues: If I delete a subflow that is currently in use there is no warning, all instances of it just disappear. Is that expected? Is there a way of finding all instances of a subflow? Searching for th…

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## [Node-red-contrib-simple-thermostat](https://discourse.nodered.org/t/node-red-contrib-simple-thermostat/39902)

<div class="topic-metadata">

**Author:** [@gnulp](https://discourse.nodered.org/u/gnulp)\
**Replies:** 5\
**Last updated:** [29 January 2021 10:06 UTC](https://discourse.nodered.org/t/node-red-contrib-simple-thermostat/39902 "2021-01-29T10:06:44Z")

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Trying to set up a simple temperature control using teh node-red-contrib-simple-thermostat. Problem: I'm unable to set the target temp by a message. Messages with topic "target" have been ignored. Has someone a hint?

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## [Looking for some insights](https://discourse.nodered.org/t/looking-for-some-insights/39942)

<div class="topic-metadata">

**Author:** [@DGRAY325](https://discourse.nodered.org/u/DGRAY325)\
**Replies:** 3\
**Last updated:** [29 January 2021 09:47 UTC](https://discourse.nodered.org/t/looking-for-some-insights/39942 "2021-01-29T09:47:39Z")

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So I am still relatively new to Node-Red but the more I dive in the more the wheels start spinning. I have a daily problem that I have been looking to create a some sort of solution to for some time now and think node-re…

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## [Generate pdf of mysql data](https://discourse.nodered.org/t/generate-pdf-of-mysql-data/39979)

<div class="topic-metadata">

**Author:** [@Yiez](https://discourse.nodered.org/u/Yiez)\
**Replies:** 1\
**Last updated:** [29 January 2021 09:14 UTC](https://discourse.nodered.org/t/generate-pdf-of-mysql-data/39979 "2021-01-29T09:14:25Z")

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Hi all, How can i generate a pdf file of mysql data in table format? I have installed the pdfmake node but not really sure how to continue with that...

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## [I am seeing this error when I use the \`q-gate\` node and am told to ask here](https://discourse.nodered.org/t/i-am-seeing-this-error-when-i-use-the-q-gate-node-and-am-told-to-ask-here/39968)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 9\
**Last updated:** [29 January 2021 09:12 UTC](https://discourse.nodered.org/t/i-am-seeing-this-error-when-i-use-the-q-gate-node-and-am-told-to-ask-here/39968 "2021-01-29T09:12:05Z")

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I have this node installed: node-red-contrib-queue-gate I am seeing errors in my flows - I think at boot - and when raised with the writer they say it is a problem outside the node's scope. The error message you've b…

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