# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=170

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

**Page:** 171

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## [Tcp msg is reassigned to the next data before debug output](https://discourse.nodered.org/t/tcp-msg-is-reassigned-to-the-next-data-before-debug-output/81907)

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**Author:** [@fullmooooon](https://discourse.nodered.org/u/fullmooooon)\
**Replies:** 19\
**Last updated:** [12 October 2023 10:37 UTC](https://discourse.nodered.org/t/tcp-msg-is-reassigned-to-the-next-data-before-debug-output/81907 "2023-10-12T10:37:13Z")

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After my node-red connects to the tcp server, if there is a slight load in the function that gets the data. It seems that debug sometimes outputs the next set of buffer data. If I reuse msg objects. Testing function…

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## [Beginner: String(INT) global variable convert to number?](https://discourse.nodered.org/t/beginner-string-int-global-variable-convert-to-number/81959)

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**Author:** [@r4sby](https://discourse.nodered.org/u/r4sby)\
**Replies:** 2\
**Last updated:** [12 October 2023 10:24 UTC](https://discourse.nodered.org/t/beginner-string-int-global-variable-convert-to-number/81959 "2023-10-12T10:24:46Z")

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Hi! First time trying Node-Red with the Weidmuller program. I have a temperature sensor and I'm trying to get this to convert to $number but I don't understand at all how to go further. Checked forums, youtube etc. My…

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## [error: 'Subscription Object Is Malformed'](https://discourse.nodered.org/t/error-subscription-object-is-malformed/81939)

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**Author:** [@Parabellum123](https://discourse.nodered.org/u/Parabellum123)\
**Replies:** 3\
**Last updated:** [12 October 2023 09:54 UTC](https://discourse.nodered.org/t/error-subscription-object-is-malformed/81939 "2023-10-12T09:54:22Z")

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## [Problem with computer startup and sounds not being heard](https://discourse.nodered.org/t/problem-with-computer-startup-and-sounds-not-being-heard/81252)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 33\
**Last updated:** [12 October 2023 09:06 UTC](https://discourse.nodered.org/t/problem-with-computer-startup-and-sounds-not-being-heard/81252 "2023-10-12T09:06:54Z")

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With all the other questions I'm asking, I've just noticed a possible problem with inject nodes and inject on strat up. I have an inject node set to inject on startup to simply say "Hello there" for me. Yes, it uses WA…

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## [Dropbox Uncaught Exception](https://discourse.nodered.org/t/dropbox-uncaught-exception/81960)

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**Author:** [@Josov](https://discourse.nodered.org/u/Josov)\
**Replies:** 0\
**Last updated:** [12 October 2023 08:29 UTC](https://discourse.nodered.org/t/dropbox-uncaught-exception/81960 "2023-10-12T08:29:50Z")

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Since about a week Node-RED keeps on restarting due an uncaught exception in node-red-node-dropbox, before there were no issues. I created a new access code and a new refresh token but it does not help. Currently 4 Raspb…

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## [Interactive offline map with svg editor](https://discourse.nodered.org/t/interactive-offline-map-with-svg-editor/81911)

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**Author:** [@Stropwafle](https://discourse.nodered.org/u/Stropwafle)\
**Replies:** 2\
**Last updated:** [12 October 2023 07:48 UTC](https://discourse.nodered.org/t/interactive-offline-map-with-svg-editor/81911 "2023-10-12T07:48:09Z")

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Hi I'm doing a project and the program I'm writing needs to have an interactive interface with a map. Now I can't use the worldmap node because I need it to work offline. So what my idea was is to use the svg editor node…

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## [How to set up SvelteKit?](https://discourse.nodered.org/t/how-to-set-up-sveltekit/81925)

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**Author:** [@neves-io](https://discourse.nodered.org/u/neves-io)\
**Replies:** 3\
**Last updated:** [11 October 2023 19:31 UTC](https://discourse.nodered.org/t/how-to-set-up-sveltekit/81925 "2023-10-11T19:31:47Z")

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Firstly - thanks so much for a wonderful node-RED plugin. I got the example Svelte project up and running no problem. We will need SvelteKit in our case - what is the best method to get this up and running in UI builde…

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## [Problem receiving RF data on serial port](https://discourse.nodered.org/t/problem-receiving-rf-data-on-serial-port/81811)

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**Author:** [@Paul-Reed](https://discourse.nodered.org/u/Paul-Reed)\
**Replies:** 14\
**Last updated:** [11 October 2023 18:58 UTC](https://discourse.nodered.org/t/problem-receiving-rf-data-on-serial-port/81811 "2023-10-11T18:58:27Z")

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I have a Raspberry Pi v3b fitted with a RF Hat, to receive data from remote sensors which I then process in node-RED -\> Influx. This has worked reliably for several years, but for some reason a few weeks ago, in the mid…

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## [Philips Hue Tap Dial Node-Red](https://discourse.nodered.org/t/philips-hue-tap-dial-node-red/81894)

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**Author:** [@kievitje](https://discourse.nodered.org/u/kievitje)\
**Replies:** 1\
**Last updated:** [10 October 2023 06:22 UTC](https://discourse.nodered.org/t/philips-hue-tap-dial-node-red/81894 "2023-10-10T06:22:26Z")

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G'day all, I'm relatively new to programming with node-red and am learning a lot on here. I'm having trouble making my tap dial work with node-red. The 4 buttons are working, what I'd like to do is make the dimmer fun…

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## [Gestion T°,HR et pression atmosphérique avec mesure de debit d'eau et T° d'eau avec un PI](https://discourse.nodered.org/t/gestion-t-hr-et-pression-atmospherique-avec-mesure-de-debit-deau-et-t-deau-avec-un-pi/81731)

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**Author:** [@Lovely](https://discourse.nodered.org/u/Lovely)\
**Replies:** 7\
**Last updated:** [11 October 2023 13:24 UTC](https://discourse.nodered.org/t/gestion-t-hr-et-pression-atmospherique-avec-mesure-de-debit-deau-et-t-deau-avec-un-pi/81731 "2023-10-11T13:24:54Z")

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Bonjour a toutes et a tous, Tous, nouvel inscrit depuis quelques jours, je me présente : Tous jeune dans ce milieu ,j'ai d'abord commence a connaitre l'univers du PI qui ma fort intéressé par les possibilités offertes …

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## [Uncaught Exception | When the global variables are not defined, but used in a node](https://discourse.nodered.org/t/uncaught-exception-when-the-global-variables-are-not-defined-but-used-in-a-node/81632)

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**Author:** [@mayurkhadse](https://discourse.nodered.org/u/mayurkhadse)\
**Replies:** 5\
**Last updated:** [11 October 2023 10:03 UTC](https://discourse.nodered.org/t/uncaught-exception-when-the-global-variables-are-not-defined-but-used-in-a-node/81632 "2023-10-11T10:03:33Z")

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There comes an exception if the global variables are not defined and we try to launch the Node red and in a node the global variables are being read. 28 Sep 12:53:23 - \[error\] TypeError: Cannot read properties of undefi…

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## [V3.1.0 touching .config.nodes.json](https://discourse.nodered.org/t/v3-1-0-touching-config-nodes-json/81942)

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**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\
**Replies:** 2\
**Last updated:** [11 October 2023 09:45 UTC](https://discourse.nodered.org/t/v3-1-0-touching-config-nodes-json/81942 "2023-10-11T09:45:44Z")

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It seems that node red 3.1.0 touches .config.nodes.json (so changes its timestamp) at each node red restart. This causes my backup strategy to keep backing it up. I believe that this is a change with 3.1.0. If so, was…

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## [Http request throws error after nodejs update](https://discourse.nodered.org/t/http-request-throws-error-after-nodejs-update/81880)

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**Author:** [@pebl-hank](https://discourse.nodered.org/u/pebl-hank)\
**Replies:** 11\
**Last updated:** [11 October 2023 07:49 UTC](https://discourse.nodered.org/t/http-request-throws-error-after-nodejs-update/81880 "2023-10-11T07:49:21Z")

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Hey there, I updated from nodejs 14 to 18 and re-installed node red. Now, when I use the original example at https://cookbook.nodered.org/http/simple-get-request I get \[error\] \[http request:874a3d4e.9b666\] RequestEr…

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## [Create flows.json programmatically?](https://discourse.nodered.org/t/create-flows-json-programmatically/81934)

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**Author:** [@Dunken](https://discourse.nodered.org/u/Dunken)\
**Replies:** 6\
**Last updated:** [11 October 2023 07:30 UTC](https://discourse.nodered.org/t/create-flows-json-programmatically/81934 "2023-10-11T07:30:03Z")

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Let's assume I have 10 flows (in 10 tabs). I would like to programmatically create a new flows.json file for a subset of the flows, in order to run them in a second Node-RED instance. What's the recommended way how to do…

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## [How to resend modbus tcp if read is diffrend from send message](https://discourse.nodered.org/t/how-to-resend-modbus-tcp-if-read-is-diffrend-from-send-message/81932)

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**Author:** [@mrDal666](https://discourse.nodered.org/u/mrDal666)\
**Replies:** 0\
**Last updated:** [10 October 2023 18:18 UTC](https://discourse.nodered.org/t/how-to-resend-modbus-tcp-if-read-is-diffrend-from-send-message/81932 "2023-10-10T18:18:09Z")

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Hi can some one help me with my code? i have problems sending to my plc. some times i get a message overload on my plc. what am i doing wrong? how do i add a resend message if read is diffrend from send message. this…

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## [Move Node to other flow](https://discourse.nodered.org/t/move-node-to-other-flow/81903)

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**Author:** [@Graefe](https://discourse.nodered.org/u/Graefe)\
**Replies:** 6\
**Last updated:** [10 October 2023 19:30 UTC](https://discourse.nodered.org/t/move-node-to-other-flow/81903 "2023-10-10T19:30:43Z")

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How can I move a node to an other flow? I think in former versions you could drag an drop to a flow tab. In 3.1 it does not work like that.

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## [How can I combine humidty and temp from Tellstick Duo MQTT before sending, when it is there?](https://discourse.nodered.org/t/how-can-i-combine-humidty-and-temp-from-tellstick-duo-mqtt-before-sending-when-it-is-there/81930)

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**Author:** [@Mastiff](https://discourse.nodered.org/u/Mastiff)\
**Replies:** 2\
**Last updated:** [10 October 2023 19:11 UTC](https://discourse.nodered.org/t/how-can-i-combine-humidty-and-temp-from-tellstick-duo-mqtt-before-sending-when-it-is-there/81930 "2023-10-10T19:11:56Z")

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I have finally found something that works for me so that I can use the Tellstick Duos that I have around my house and cabin (I bought a bunch of them cheap when they were going out of style, so quite some years ago). Thi…

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## [World Map storing tag location and Geo fences and recall them on map load](https://discourse.nodered.org/t/world-map-storing-tag-location-and-geo-fences-and-recall-them-on-map-load/81906)

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**Author:** [@88bit](https://discourse.nodered.org/u/88bit)\
**Replies:** 2\
**Last updated:** [10 October 2023 16:20 UTC](https://discourse.nodered.org/t/world-map-storing-tag-location-and-geo-fences-and-recall-them-on-map-load/81906 "2023-10-10T16:20:11Z")

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Hi, I'm working on a mapping project showing sensor data on a map. The data is received via MQTT and works very nicely on dynamic input. Now I'm looking to make the last values persistent on the map. I estimate I will h…

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## [Jsonata in global environment variables with reference](https://discourse.nodered.org/t/jsonata-in-global-environment-variables-with-reference/81927)

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**Author:** [@IotDeveloper](https://discourse.nodered.org/u/IotDeveloper)\
**Replies:** 1\
**Last updated:** [10 October 2023 15:52 UTC](https://discourse.nodered.org/t/jsonata-in-global-environment-variables-with-reference/81927 "2023-10-10T15:52:25Z")

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Hello, i want to use jsonata expression within the released function "Global Environment Variables". The jsonata contains a logical function, which checks if a environmental variable exists. If not, it sets a default v…

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## [Newbie Node-red help creating a flow to turn off Lightwave wall socket (wattage)](https://discourse.nodered.org/t/newbie-node-red-help-creating-a-flow-to-turn-off-lightwave-wall-socket-wattage/81914)

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**Author:** [@NRnovice](https://discourse.nodered.org/u/NRnovice)\
**Replies:** 3\
**Last updated:** [10 October 2023 15:48 UTC](https://discourse.nodered.org/t/newbie-node-red-help-creating-a-flow-to-turn-off-lightwave-wall-socket-wattage/81914 "2023-10-10T15:48:24Z")

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Good Afternoon all, I'm new to using Node Red and require some help setting up a flow. I've searched online but unable to find what I'm looking for. My System: Home Assistance yellow V2023.10.1, OS V10.5 Node red V3.…

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## [How can I pass python script file and input image folder path as params using postman?](https://discourse.nodered.org/t/how-can-i-pass-python-script-file-and-input-image-folder-path-as-params-using-postman/81830)

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**Author:** [@Ram1](https://discourse.nodered.org/u/Ram1)\
**Replies:** 17\
**Last updated:** [10 October 2023 12:27 UTC](https://discourse.nodered.org/t/how-can-i-pass-python-script-file-and-input-image-folder-path-as-params-using-postman/81830 "2023-10-10T12:27:51Z")

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How can I pass python script file and input image folder path as params using postman body? and get from exec node as msg.payload and run the script file?

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## [Utiliser les datetime avec mariadb](https://discourse.nodered.org/t/utiliser-les-datetime-avec-mariadb/81915)

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**Author:** [@mfrederic](https://discourse.nodered.org/u/mfrederic)\
**Replies:** 0\
**Last updated:** [10 October 2023 11:49 UTC](https://discourse.nodered.org/t/utiliser-les-datetime-avec-mariadb/81915 "2023-10-10T11:49:13Z")

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bonjour, je récupère une date d'un compteur d'énergie. Je souhaiterais intégrer cette date dans Mariadb mais je me perds avec les différents formats. merci d'avance

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## [Node-red control mplayer on windows](https://discourse.nodered.org/t/node-red-control-mplayer-on-windows/81876)

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**Author:** [@xiaoqiao](https://discourse.nodered.org/u/xiaoqiao)\
**Replies:** 1\
**Last updated:** [9 October 2023 12:03 UTC](https://discourse.nodered.org/t/node-red-control-mplayer-on-windows/81876 "2023-10-09T12:03:19Z")

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Hello, I saved several music(mp3 format) on my windows PC, and install node-red on this windows PC, I want use node-red to control mplayer to play the music I want, does any body have this kind of experience, and if this…

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## [My node-red-contrib-opcua client is showing invalid endpoint, check that server has security policy # None](https://discourse.nodered.org/t/my-node-red-contrib-opcua-client-is-showing-invalid-endpoint-check-that-server-has-security-policy-none/81901)

<div class="topic-metadata">

**Author:** [@ice\_soul](https://discourse.nodered.org/u/ice_soul)\
**Replies:** 0\
**Last updated:** [10 October 2023 05:48 UTC](https://discourse.nodered.org/t/my-node-red-contrib-opcua-client-is-showing-invalid-endpoint-check-that-server-has-security-policy-none/81901 "2023-10-10T05:48:52Z")

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I tried to use the OPCUA client of ThingsGateway to test that it can connect to Kepserver EX6 successfully, but the node-red opcua client of 0.2.315 version can't do that, I don't set any security strategies, anyone who …

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## [RS485 don´t reconnect after failure](https://discourse.nodered.org/t/rs485-don-t-reconnect-after-failure/81854)

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**Author:** [@Becker](https://discourse.nodered.org/u/Becker)\
**Replies:** 7\
**Last updated:** [10 October 2023 05:38 UTC](https://discourse.nodered.org/t/rs485-don-t-reconnect-after-failure/81854 "2023-10-10T05:38:15Z")

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Hi, I got a big problem, till a few days ago I used a RPi4 to query 3 EASTRON SDM72v2 with a DSD TECH SH-U11F, this works for years without problems. Now I changed the RPi4 to a RPi2 - fresh install - same flow. Every …

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## [Reporting with Nodered](https://discourse.nodered.org/t/reporting-with-nodered/81788)

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**Author:** [@en-andreea-anastases](https://discourse.nodered.org/u/en-andreea-anastases)\
**Replies:** 6\
**Last updated:** [9 October 2023 21:57 UTC](https://discourse.nodered.org/t/reporting-with-nodered/81788 "2023-10-09T21:57:03Z")

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I would like to collect some data from nodered flows. One type of data is the flow starting and finishing. I'd mention that I'd like to collect my data in Azure ApplicationInsights - but maybe this is not that importan…

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## [Nodered - status (executing flows)](https://discourse.nodered.org/t/nodered-status-executing-flows/81890)

<div class="topic-metadata">

**Author:** [@en-andreea-anastases](https://discourse.nodered.org/u/en-andreea-anastases)\
**Replies:** 4\
**Last updated:** [9 October 2023 21:37 UTC](https://discourse.nodered.org/t/nodered-status-executing-flows/81890 "2023-10-09T21:37:03Z")

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Hi, Is there a way to get the list of currently executing flows (maybe even some history)? I am still trying to build some reporting around this information. we are using nodered as a low-code/visual programming platfo…

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## [Topic filter and block](https://discourse.nodered.org/t/topic-filter-and-block/81868)

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**Author:** [@Danman](https://discourse.nodered.org/u/Danman)\
**Replies:** 7\
**Last updated:** [9 October 2023 20:29 UTC](https://discourse.nodered.org/t/topic-filter-and-block/81868 "2023-10-09T20:29:12Z")

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Hi all wondering if someone could help me, i have 2 input topics t3 and t1 and would like to pass t3 through unless t1 is present then pass that payload value through instead, like a logic gate, but instead of true fals…

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## [Settings file path change](https://discourse.nodered.org/t/settings-file-path-change/81883)

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**Author:** [@LucasPeluso](https://discourse.nodered.org/u/LucasPeluso)\
**Replies:** 8\
**Last updated:** [9 October 2023 16:44 UTC](https://discourse.nodered.org/t/settings-file-path-change/81883 "2023-10-09T16:44:32Z")

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Hi, I need to change the setttings.js path. Is this posiblle? Thanks, Lucas

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## [Debug msg - but which tab?](https://discourse.nodered.org/t/debug-msg-but-which-tab/81858)

<div class="topic-metadata">

**Author:** [@StrongTown](https://discourse.nodered.org/u/StrongTown)\
**Replies:** 8\
**Last updated:** [9 October 2023 16:41 UTC](https://discourse.nodered.org/t/debug-msg-but-which-tab/81858 "2023-10-09T16:41:27Z")

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I have searched this but not found any helpful items. I have a fairly extensive (large) NR program running various things for my home control. There are 18 tabs and a significant amount of JS code. The flows\_xxxxxxxxxx…

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