# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=33

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

**Page:** 34

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## [Node-Red with React Native](https://discourse.nodered.org/t/node-red-with-react-native/97897)

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**Author:** [@zajjaj](https://discourse.nodered.org/u/zajjaj)\
**Replies:** 4\
**Last updated:** [2 July 2025 11:32 UTC](https://discourse.nodered.org/t/node-red-with-react-native/97897 "2025-07-02T11:32:11Z")

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I am a newbie in Node-RED, but I find it really useful and working in the enviroment seems to be simple. I want to automate a system using Node-Red, ESP32, and React native. My current approach is that Esp32 would commu…

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## [Using Node Red to monitor a radio site](https://discourse.nodered.org/t/using-node-red-to-monitor-a-radio-site/97861)

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**Author:** [@Fletch](https://discourse.nodered.org/u/Fletch)\
**Replies:** 17\
**Last updated:** [1 July 2025 04:12 UTC](https://discourse.nodered.org/t/using-node-red-to-monitor-a-radio-site/97861 "2025-07-01T04:12:06Z")

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Hello, I am new here. My background is in radio communications and I admit to being bloody hopeless at computer projects. What I am trying to do for our local amateur radio group is to provide some way of remotely monito…

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## [Anybody controlling EcoBee locally (no Internet)?](https://discourse.nodered.org/t/anybody-controlling-ecobee-locally-no-internet/97887)

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**Author:** [@OffGridNoob](https://discourse.nodered.org/u/OffGridNoob)\
**Replies:** 1\
**Last updated:** [1 July 2025 10:02 UTC](https://discourse.nodered.org/t/anybody-controlling-ecobee-locally-no-internet/97887 "2025-07-01T10:02:43Z")

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I'm seeing a few threads where people are using NR with it, but it seems many if not all are having NR authenticate with their server in order to get to the device. I want to have NR control it on a LAN with zero Intern…

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## [Resources usage of Node RED on Raspberry Pi 4B](https://discourse.nodered.org/t/resources-usage-of-node-red-on-raspberry-pi-4b/97871)

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**Author:** [@AungKL](https://discourse.nodered.org/u/AungKL)\
**Replies:** 7\
**Last updated:** [1 July 2025 06:59 UTC](https://discourse.nodered.org/t/resources-usage-of-node-red-on-raspberry-pi-4b/97871 "2025-07-01T06:59:44Z")

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Hello dude, I'd like to know the information of the resources (RAM and CPU) of Node RED which is running on Raspberry Pi 4B. I'm planning to run Pi 4B on the battery for some IoT projects. On Node RED, I'll use the bu…

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## [SQlite problem with NULL values in the record](https://discourse.nodered.org/t/sqlite-problem-with-null-values-in-the-record/97883)

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**Author:** [@tsuratolya](https://discourse.nodered.org/u/tsuratolya)\
**Replies:** 1\
**Last updated:** [1 July 2025 04:35 UTC](https://discourse.nodered.org/t/sqlite-problem-with-null-values-in-the-record/97883 "2025-07-01T04:35:29Z")

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Hello. Help me understand what is not recording data. Or rather, it is recording empty memory cells. The data is recorded as text - it is recorded in the database, but the numeric values ​​of the data are not recorded. W…

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## [Find smallest and greatest value](https://discourse.nodered.org/t/find-smallest-and-greatest-value/97879)

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**Author:** [@Janvi](https://discourse.nodered.org/u/Janvi)\
**Replies:** 4\
**Last updated:** [30 June 2025 18:36 UTC](https://discourse.nodered.org/t/find-smallest-and-greatest-value/97879 "2025-06-30T18:36:43Z")

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Assume a JSON like where it is easy to build a sum by msg = {"payload" : msg.payload\["AC Out L1"\] + msg.payload\["AC Out L2"\] + msg.payload\["AC Out L3"\]}; return msg; Now I…

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## [Palette Manager Cache](https://discourse.nodered.org/t/palette-manager-cache/97678)

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**Author:** [@Aridzki](https://discourse.nodered.org/u/Aridzki)\
**Replies:** 6\
**Last updated:** [30 June 2025 01:53 UTC](https://discourse.nodered.org/t/palette-manager-cache/97678 "2025-06-30T01:53:53Z")

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Hi all, I found out that I can't remove some modules 1 of 3 modules is my custom node. I have tried to uninstall and install the node red again, but it doesn't work. I checked the node modules folder, it is still empty. …

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## [Community request: new icons for UIBUILDER](https://discourse.nodered.org/t/community-request-new-icons-for-uibuilder/97862)

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**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 2\
**Last updated:** [29 June 2025 22:49 UTC](https://discourse.nodered.org/t/community-request-new-icons-for-uibuilder/97862 "2025-06-29T22:49:52Z")

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Hi all, On my backlog is a thought about having a different web icon for UIBUILDER documentation and a UIBUILDER app. At the moment, they are both the same and I personally find this confusing if/when I have many tabs o…

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## [Tcp-in node "listen-to" mode: listen on non-localhost?](https://discourse.nodered.org/t/tcp-in-node-listen-to-mode-listen-on-non-localhost/97849)

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**Author:** [@gregorius](https://discourse.nodered.org/u/gregorius)\
**Replies:** 7\
**Last updated:** [29 June 2025 13:25 UTC](https://discourse.nodered.org/t/tcp-in-node-listen-to-mode-listen-on-non-localhost/97849 "2025-06-29T13:25:00Z")

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Hi There, Just as followup on my tcp nodes question, I'm wondering is it possible to listen to something non-localhost: That configuration is: Tcp in node should start a server on port 1231 on host localhost right? …

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## [Admin auth: password issue](https://discourse.nodered.org/t/admin-auth-password-issue/97815)

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**Author:** [@mus-ab03](https://discourse.nodered.org/u/mus-ab03)\
**Replies:** 2\
**Last updated:** [29 June 2025 10:59 UTC](https://discourse.nodered.org/t/admin-auth-password-issue/97815 "2025-06-29T10:59:06Z")

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I have node-red 4.0.9 running as a service using nssm, I set up the password using node-red-admin hash-pw. After a few days it seems that the password was changed automatically and I had to reset the password in settings…

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## [Wanted: Simple state machine examples](https://discourse.nodered.org/t/wanted-simple-state-machine-examples/97482)

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**Author:** [@Janvi](https://discourse.nodered.org/u/Janvi)\
**Replies:** 58\
**Last updated:** [29 June 2025 10:54 UTC](https://discourse.nodered.org/t/wanted-simple-state-machine-examples/97482 "2025-06-29T10:54:56Z")

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As a newbe I already mastered some simple flows for combinatorical problems. My system is a energy storage system running Venus what comes with a preconfigured NodeRed. Although I am long term C and assembly programmer…

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## [How to loop thru \*.json files in a directory](https://discourse.nodered.org/t/how-to-loop-thru-json-files-in-a-directory/97799)

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**Author:** [@alexander77](https://discourse.nodered.org/u/alexander77)\
**Replies:** 12\
**Last updated:** [29 June 2025 10:37 UTC](https://discourse.nodered.org/t/how-to-loop-thru-json-files-in-a-directory/97799 "2025-06-29T10:37:17Z")

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Hi, i have a directory containing ~500 \*.json files, that must be processed. How can i create a loop, that reads one file after another, processes it (this is not the problem) and stores it with another filename.extensi…

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## [Memory usage grows steadily](https://discourse.nodered.org/t/memory-usage-grows-steadily/97728)

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**Author:** [@pacmanmt](https://discourse.nodered.org/u/pacmanmt)\
**Replies:** 32\
**Last updated:** [29 June 2025 10:35 UTC](https://discourse.nodered.org/t/memory-usage-grows-steadily/97728 "2025-06-29T10:35:32Z")

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I have a Raspi 4B 8GB onto which I run NodeRed, InfluxDB2, Grafana, Mosquitto and ZigBee2MQTT. I am not that much into programming or Linux systems management and I am trying to understand why, every now and then, NodeR…

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## [Why cannot arm-v7 architecture Linux 3.10 download Docker based Node-red？](https://discourse.nodered.org/t/why-cannot-arm-v7-architecture-linux-3-10-download-docker-based-node-red/97856)

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**Author:** [@Yesung](https://discourse.nodered.org/u/Yesung)\
**Replies:** 0\
**Last updated:** [29 June 2025 06:35 UTC](https://discourse.nodered.org/t/why-cannot-arm-v7-architecture-linux-3-10-download-docker-based-node-red/97856 "2025-06-29T06:35:44Z")

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My device architecture is arm-v7, Linux 3.10. I used to download Docker based Node-red using the following command in 2023, but it doesn't work now: root@SMT-ECUa11:~# docker run -v /node\_red\_data:/data --group-add …

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## [Serial In/Out Node problem, but working in Arduino serial monitor](https://discourse.nodered.org/t/serial-in-out-node-problem-but-working-in-arduino-serial-monitor/97846)

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**Author:** [@AungKL](https://discourse.nodered.org/u/AungKL)\
**Replies:** 1\
**Last updated:** [28 June 2025 13:30 UTC](https://discourse.nodered.org/t/serial-in-out-node-problem-but-working-in-arduino-serial-monitor/97846 "2025-06-28T13:30:19Z")

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Hello dude, Good day, I have some problem with Serial In/Out node while sending the message to ttyUSB0 of the raspberry pi 4B board. The setup of the communication is, Fluke 289 \<=\> USB IR cable \[FT232 chip\] \<=\> \[ttyU…

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## [How to use OCPP in Node-Red](https://discourse.nodered.org/t/how-to-use-ocpp-in-node-red/95495)

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**Author:** [@nygma2004](https://discourse.nodered.org/u/nygma2004)\
**Replies:** 52\
**Last updated:** [28 June 2025 10:25 UTC](https://discourse.nodered.org/t/how-to-use-ocpp-in-node-red/95495 "2025-06-28T10:25:41Z")

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There has been a few topics on this with some specific questions, but I am afraid I need some support from the very beginning. I want to communicate with OCPP capable EVSEs. There are 3 of them at (my friends) place. I …

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## [Unable to deploy changes on node red](https://discourse.nodered.org/t/unable-to-deploy-changes-on-node-red/97842)

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**Author:** [@Desmond-Zeh](https://discourse.nodered.org/u/Desmond-Zeh)\
**Replies:** 2\
**Last updated:** [27 June 2025 19:13 UTC](https://discourse.nodered.org/t/unable-to-deploy-changes-on-node-red/97842 "2025-06-27T19:13:34Z")

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Hello Team! I am facing difficulties deploying changes made to my project on node-red. Anytime I try to deploy the changes made, the following error message appears in the cmd prompt and blocks the deploy from occurrin…

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## [Node red write into postgres in other format](https://discourse.nodered.org/t/node-red-write-into-postgres-in-other-format/97841)

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**Author:** [@bobdion](https://discourse.nodered.org/u/bobdion)\
**Replies:** 9\
**Last updated:** [27 June 2025 17:01 UTC](https://discourse.nodered.org/t/node-red-write-into-postgres-in-other-format/97841 "2025-06-27T17:01:15Z")

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i got a node that insert a line into the database INSERT INTO public."TB\_ALERTE"("TR\_SENSORNAME", "TR\_INFO","TR\_DATEHEURE") VALUES ( 'SENSOR/ TOILETTE' , 'ON','{{msg.payload}}'); the payload is coming from a function c…

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## [What is the difference between this expressions](https://discourse.nodered.org/t/what-is-the-difference-between-this-expressions/97738)

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**Author:** [@Janvi](https://discourse.nodered.org/u/Janvi)\
**Replies:** 15\
**Last updated:** [27 June 2025 12:20 UTC](https://discourse.nodered.org/t/what-is-the-difference-between-this-expressions/97738 "2025-06-27T12:20:55Z")

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Sorry - I am new with JS. What is the difference between msg.payload = 0; return msg; and msg = {payload:0\]; return msg; and return 0; and maybe to discontinue the flow return null;

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## [Harmony websocket crashing node-red](https://discourse.nodered.org/t/harmony-websocket-crashing-node-red/97691)

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**Author:** [@mark31](https://discourse.nodered.org/u/mark31)\
**Replies:** 7\
**Last updated:** [27 June 2025 12:18 UTC](https://discourse.nodered.org/t/harmony-websocket-crashing-node-red/97691 "2025-06-27T12:18:47Z")

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Been using "node-red-contrib-harmony-websocket" for years. Today it caused node-red crash while in use. When I tried to restart node-red this error in the log... $ Start Node-RED Once Node-RED has started, point a brow…

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## [Set system timezone from node-RED](https://discourse.nodered.org/t/set-system-timezone-from-node-red/97809)

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**Author:** [@aitor](https://discourse.nodered.org/u/aitor)\
**Replies:** 7\
**Last updated:** [27 June 2025 09:35 UTC](https://discourse.nodered.org/t/set-system-timezone-from-node-red/97809 "2025-06-27T09:35:54Z")

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Hi, Im trying to set timezone inside the Docker container from node-RED this way: The idea is to inject timezone so I can easily set system timezone. Im running v4.0.5 on docker. This method throws an error because…

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## [IP camera - install onvif package](https://discourse.nodered.org/t/ip-camera-install-onvif-package/97744)

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**Author:** [@Le-Ze](https://discourse.nodered.org/u/Le-Ze)\
**Replies:** 5\
**Last updated:** [27 June 2025 07:09 UTC](https://discourse.nodered.org/t/ip-camera-install-onvif-package/97744 "2025-06-27T07:09:35Z")

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Hi. How to install the latest ONVIF packages? In Manage Palette is Node-Red-Conrtrib-only 1.0.3 I only have one snapshot node. Thank you

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## [Subflows - passing payload or other properties via environment variable?](https://discourse.nodered.org/t/subflows-passing-payload-or-other-properties-via-environment-variable/97756)

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**Author:** [@SiDtheTurtle](https://discourse.nodered.org/u/SiDtheTurtle)\
**Replies:** 11\
**Last updated:** [26 June 2025 12:28 UTC](https://discourse.nodered.org/t/subflows-passing-payload-or-other-properties-via-environment-variable/97756 "2025-06-26T12:28:05Z")

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Hi folks! Here's my scenario: I'm building automations in Home Assistant, I want to create a reusable function so that any time I want to send a mobile notification, I can use the same set of nodes. I can build this eas…

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## [Question re: node-red-contrib-time-range-switch](https://discourse.nodered.org/t/question-re-node-red-contrib-time-range-switch/97798)

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**Author:** [@abrayshaw](https://discourse.nodered.org/u/abrayshaw)\
**Replies:** 1\
**Last updated:** [26 June 2025 09:09 UTC](https://discourse.nodered.org/t/question-re-node-red-contrib-time-range-switch/97798 "2025-06-26T09:09:30Z")

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This question is specifically about the node-red-contrib-time-range-switch node. I've successfully implemented it to control a flow restricted to a time range (I'm on the USA east coast). I've set the range to 7:30 (AM) …

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## [I need assistance with the exec node](https://discourse.nodered.org/t/i-need-assistance-with-the-exec-node/97793)

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**Author:** [@mahsh](https://discourse.nodered.org/u/mahsh)\
**Replies:** 12\
**Last updated:** [25 June 2025 23:24 UTC](https://discourse.nodered.org/t/i-need-assistance-with-the-exec-node/97793 "2025-06-25T23:24:24Z")

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Hi, I'm running Node-RED on Windows and using the "exec" node with the following command to get .jpg file modification details: stat -c "%z %s %n" -- Here's the issue I'm facing: In the first iteration, I modify one .…

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## [ZwaveJS mutiple identical debug messages](https://discourse.nodered.org/t/zwavejs-mutiple-identical-debug-messages/97781)

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**Author:** [@fogmajor](https://discourse.nodered.org/u/fogmajor)\
**Replies:** 2\
**Last updated:** [25 June 2025 22:10 UTC](https://discourse.nodered.org/t/zwavejs-mutiple-identical-debug-messages/97781 "2025-06-25T22:10:20Z")

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Good Evening I have been playing with adding all my Zwave devices to my node-red set up using the Zwavejs node, Unfortunately due to work commitments I cannot seem to get a clean run on it. I just wondered if someone co…

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## [JavaScript heap out of memory after message processing ends](https://discourse.nodered.org/t/javascript-heap-out-of-memory-after-message-processing-ends/97775)

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**Author:** [@KronwarsCZ](https://discourse.nodered.org/u/KronwarsCZ)\
**Replies:** 3\
**Last updated:** [25 June 2025 17:34 UTC](https://discourse.nodered.org/t/javascript-heap-out-of-memory-after-message-processing-ends/97775 "2025-06-25T17:34:05Z")

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Hi everyone! I am facing a weird issue recently after (I believe) a message processing ends. After about 30 seconds after a message is processed, I get a Javascript heap out-of-memory error and my whole docker container…

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## [How to get the property(env value) of subflow with it's node](https://discourse.nodered.org/t/how-to-get-the-property-env-value-of-subflow-with-its-node/97788)

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**Author:** [@peeyee](https://discourse.nodered.org/u/peeyee)\
**Replies:** 1\
**Last updated:** [25 June 2025 11:28 UTC](https://discourse.nodered.org/t/how-to-get-the-property-env-value-of-subflow-with-its-node/97788 "2025-06-25T11:28:03Z")

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I have designed a custom Node-RED node with a filename parameter, which is currently parsed as a plain string. I would like to allow this parameter to accept dynamic values—for example, by referencing a property defined…

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## [Node-red-contrib-opcua Nodes load on the OPCUA server](https://discourse.nodered.org/t/node-red-contrib-opcua-nodes-load-on-the-opcua-server/97785)

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**Author:** [@enginebeat](https://discourse.nodered.org/u/enginebeat)\
**Replies:** 2\
**Last updated:** [25 June 2025 11:12 UTC](https://discourse.nodered.org/t/node-red-contrib-opcua-nodes-load-on-the-opcua-server/97785 "2025-06-25T11:12:07Z")

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Hi All, Been developing a Node-red flow as a client to commission one of my power supplies. the PSU control has an OPCUA Server. I have quite a few variables, but not what I would say excessive at this point, but I'm g…

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## [Opening a webpage in a new window from a button](https://discourse.nodered.org/t/opening-a-webpage-in-a-new-window-from-a-button/97671)

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**Author:** [@bobs409](https://discourse.nodered.org/u/bobs409)\
**Replies:** 2\
**Last updated:** [25 June 2025 10:24 UTC](https://discourse.nodered.org/t/opening-a-webpage-in-a-new-window-from-a-button/97671 "2025-06-25T10:24:31Z")

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I am trying to open a webpage in a new window by using a button in node red. I tried using this example: Opening external links using dashboard buttons (flow) - Node-RED It's does open the links but it's not opening in …

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