# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=126

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

**Page:** 127

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## [Udp out error EACCESS](https://discourse.nodered.org/t/udp-out-error-eaccess/86127)

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**Author:** [@AE8U](https://discourse.nodered.org/u/AE8U)\
**Replies:** 15\
**Last updated:** [5 March 2024 22:18 UTC](https://discourse.nodered.org/t/udp-out-error-eaccess/86127 "2024-03-05T22:18:11Z")

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I am running Ubuntu Budgie 22.04.3 on a Raspberry Pi 4B. I am running Node-RED and I am trying to use a flow that has a UDP out node. I am trying to use that node to broadcast a UDP message to port 12020 on my local netw…

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## [Issues on exporting / importing flows using the api](https://discourse.nodered.org/t/issues-on-exporting-importing-flows-using-the-api/84900)

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**Author:** [@msmthng](https://discourse.nodered.org/u/msmthng)\
**Replies:** 15\
**Last updated:** [5 March 2024 19:44 UTC](https://discourse.nodered.org/t/issues-on-exporting-importing-flows-using-the-api/84900 "2024-03-05T19:44:07Z")

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i have two instances of node red running, i would like to copy a given flow from instance one to instance two. flow\_id = '8429e42d5be21f50' handler.get\_flow(flow\_id) print(json.dumps(flow, indent=4)) provides: {'dis…

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## [Node-red-contrib-oauth2 no access token in response- email in O365](https://discourse.nodered.org/t/node-red-contrib-oauth2-no-access-token-in-response-email-in-o365/86061)

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**Author:** [@hadwll](https://discourse.nodered.org/u/hadwll)\
**Replies:** 2\
**Last updated:** [5 March 2024 16:48 UTC](https://discourse.nodered.org/t/node-red-contrib-oauth2-no-access-token-in-response-email-in-o365/86061 "2024-03-05T16:48:08Z")

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I am working to setup an emailer in office 365, one of the steps is to setup Oauth2 I have read the documentation and have done the following registered with Microsoft Entra. Created an access token Created Applicatio…

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## [Raspberry 4 reboots just after starting node-red](https://discourse.nodered.org/t/raspberry-4-reboots-just-after-starting-node-red/86138)

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**Author:** [@marcpouliot](https://discourse.nodered.org/u/marcpouliot)\
**Replies:** 8\
**Last updated:** [5 March 2024 16:28 UTC](https://discourse.nodered.org/t/raspberry-4-reboots-just-after-starting-node-red/86138 "2024-03-05T16:28:04Z")

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I issue a node-red-start on raspberry pi 4 32G SD, and I get a "not running on a pi" on a freshly initialied sd from the bash command in node-red documentation. I get a warning : Not running on a Pi - Ignoring node !…

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## [How to send a simple string to a serial node](https://discourse.nodered.org/t/how-to-send-a-simple-string-to-a-serial-node/85933)

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**Author:** [@lawero](https://discourse.nodered.org/u/lawero)\
**Replies:** 9\
**Last updated:** [5 March 2024 16:19 UTC](https://discourse.nodered.org/t/how-to-send-a-simple-string-to-a-serial-node/85933 "2024-03-05T16:19:02Z")

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I'm quite new to Node-RED, and I might be missing a significant feature. I have a straightforward setup where I need to send a string to a serial device. To provide some context, the device in question is a Mettler Tole…

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## [Chart-image font style](https://discourse.nodered.org/t/chart-image-font-style/86158)

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**Author:** [@robbe.haerens](https://discourse.nodered.org/u/robbe.haerens)\
**Replies:** 4\
**Last updated:** [5 March 2024 15:54 UTC](https://discourse.nodered.org/t/chart-image-font-style/86158 "2024-03-05T15:54:44Z")

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Hello, as part of my internship I have the assignment to create a line graph from a CSV and put it on a PDF. I manage to create the graph and put it on the PDF, but the font on the graph looks like this. " Is there s…

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## [Insert multiple sensors data into mysql](https://discourse.nodered.org/t/insert-multiple-sensors-data-into-mysql/86133)

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**Author:** [@Elo](https://discourse.nodered.org/u/Elo)\
**Replies:** 10\
**Last updated:** [5 March 2024 15:18 UTC](https://discourse.nodered.org/t/insert-multiple-sensors-data-into-mysql/86133 "2024-03-05T15:18:32Z")

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I need help to insert correctly. Function node code: Template node code: \<INSERT INTO digitalizacao.Milacron(temperatureZone0,temperatureZone1,temperatureZone2,temperatureZone3,temperatureZone4,temperatureZone5) …

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## [UI dashboard editing](https://discourse.nodered.org/t/ui-dashboard-editing/86111)

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**Author:** [@neyarprasanth1](https://discourse.nodered.org/u/neyarprasanth1)\
**Replies:** 27\
**Last updated:** [5 March 2024 13:06 UTC](https://discourse.nodered.org/t/ui-dashboard-editing/86111 "2024-03-05T13:06:32Z")

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Hello all, I have Ui dashboard and data imported from the node red. Actually, I used the Ui-text node. And I used 18 text nodes. so, in Ui-dashboard it I separated to 9 nodes per rows. So here I want to put headline in b…

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## [UPDATE / Resolved: Upgraded to 3.1 - http request nodes are now giving ERR\_TLS\_CERT\_ALTNAME\_INVALID error. Rolled back to 3.0, error is gone](https://discourse.nodered.org/t/update-resolved-upgraded-to-3-1-http-request-nodes-are-now-giving-err-tls-cert-altname-invalid-error-rolled-back-to-3-0-error-is-gone/86143)

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**Author:** [@sstratoti](https://discourse.nodered.org/u/sstratoti)\
**Replies:** 0\
**Last updated:** [5 March 2024 06:11 UTC](https://discourse.nodered.org/t/update-resolved-upgraded-to-3-1-http-request-nodes-are-now-giving-err-tls-cert-altname-invalid-error-rolled-back-to-3-0-error-is-gone/86143 "2024-03-05T06:11:26Z")

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@TotallyInformation Finally figured this one out, and wanted to share the resolution! Because an older palette I had installed was using an older version of agent-base, it was breaking the http-response node. Which mea…

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## [Motor control via a digital button (dashboard)](https://discourse.nodered.org/t/motor-control-via-a-digital-button-dashboard/86130)

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**Author:** [@Fabian1](https://discourse.nodered.org/u/Fabian1)\
**Replies:** 5\
**Last updated:** [4 March 2024 16:57 UTC](https://discourse.nodered.org/t/motor-control-via-a-digital-button-dashboard/86130 "2024-03-04T16:57:19Z")

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Hello, I want to control a motor and use a RaspberryPi4b. The control is monitored via a GRBL CNC controller. As long as I hold down a button (Digital Dashboard), the motor should turn to the right as soon as I release t…

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## [Node-red-contrib-arp not filtering](https://discourse.nodered.org/t/node-red-contrib-arp-not-filtering/16103)

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**Author:** [@patwiken](https://discourse.nodered.org/u/patwiken)\
**Replies:** 8\
**Last updated:** [4 March 2024 15:36 UTC](https://discourse.nodered.org/t/node-red-contrib-arp-not-filtering/16103 "2024-03-04T15:36:29Z")

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Hi I'm trying to use the solution https://notenoughtech.com/home-automation/nodered-home-automation/nodered-whos-home/ to know who is at home but it does not work. When I put a MAC address in the node, there is no filte…

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## [Using a formula in change node](https://discourse.nodered.org/t/using-a-formula-in-change-node/86099)

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**Author:** [@k5map](https://discourse.nodered.org/u/k5map)\
**Replies:** 7\
**Last updated:** [4 March 2024 13:01 UTC](https://discourse.nodered.org/t/using-a-formula-in-change-node/86099 "2024-03-04T13:01:42Z")

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Prior to v3.1.5, I used a formula in the change node to calculate a numerical value: (8192\*.66) Now this formula is generating an error. Does anyone know how I can keep my formula but resolve the error? Please note t…

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## [Please help me find an encrypted WebSocket node.](https://discourse.nodered.org/t/please-help-me-find-an-encrypted-websocket-node/86032)

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**Author:** [@maxwellchaos](https://discourse.nodered.org/u/maxwellchaos)\
**Replies:** 2\
**Last updated:** [4 March 2024 12:57 UTC](https://discourse.nodered.org/t/please-help-me-find-an-encrypted-websocket-node/86032 "2024-03-04T12:57:18Z")

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Hello everyone! I am creating an Android application to connect to Node-RED in a local network only. I want to use a WebSocket server in Node-RED (WebSocket in/out in "listen on" mode), but I am getting the ws protocol…

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## [When do new modules show up in palette manager?](https://discourse.nodered.org/t/when-do-new-modules-show-up-in-palette-manager/86116)

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**Author:** [@egekorkan](https://discourse.nodered.org/u/egekorkan)\
**Replies:** 2\
**Last updated:** [4 March 2024 11:54 UTC](https://discourse.nodered.org/t/when-do-new-modules-show-up-in-palette-manager/86116 "2024-03-04T11:54:04Z")

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I have found questions about when new versions of a module appear in the palette manager but I did not find anything about brand new modules. So when one adds a brand new module, how long does it take for the module to …

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## [Nrlint install error](https://discourse.nodered.org/t/nrlint-install-error/84731)

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**Author:** [@protonmw](https://discourse.nodered.org/u/protonmw)\
**Replies:** 28\
**Last updated:** [4 March 2024 06:06 UTC](https://discourse.nodered.org/t/nrlint-install-error/84731 "2024-03-04T06:06:06Z")

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Hi all, I´m trying to install nrlint to my NR (running on Windows10) according to the documentation (https://github.com/node-red/nrlint). But when I add the following to my settings.js, I´m unable to start node red. m…

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## [Python3-function calulation fail](https://discourse.nodered.org/t/python3-function-calulation-fail/86011)

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**Author:** [@lillebjorn559](https://discourse.nodered.org/u/lillebjorn559)\
**Replies:** 4\
**Last updated:** [4 March 2024 05:51 UTC](https://discourse.nodered.org/t/python3-function-calulation-fail/86011 "2024-03-04T05:51:33Z")

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Hi, I'm seeking help with this code I have. Point 1: When I provide a number input via ui.text.input to the Python 3 function, it only remembers it until I provide input from another ui.text.input. Point 2: When my M…

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## [Docker image \> where is node-red's home?](https://discourse.nodered.org/t/docker-image-where-is-node-reds-home/86105)

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**Author:** [@FloRu](https://discourse.nodered.org/u/FloRu)\
**Replies:** 3\
**Last updated:** [4 March 2024 00:16 UTC](https://discourse.nodered.org/t/docker-image-where-is-node-reds-home/86105 "2024-03-04T00:16:17Z")

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Hi! Does anybody know where the node-red home directory is located and if (and where exactly) I can access it from the host outside the docker image?

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## [Node red vil not start i home assistent](https://discourse.nodered.org/t/node-red-vil-not-start-i-home-assistent/86101)

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**Author:** [@Home-kia](https://discourse.nodered.org/u/Home-kia)\
**Replies:** 1\
**Last updated:** [3 March 2024 21:40 UTC](https://discourse.nodered.org/t/node-red-vil-not-start-i-home-assistent/86101 "2024-03-03T21:40:57Z")

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Mar 21:13:42 - \[warn\] \[node-red-contrib-s7comm/s7comm\] 's7comm' already registered by module industrialcomm 3 Mar 21:13:42 - \[warn\] ------------------------------------------------------ 3 Mar 21:13:42 - \[info\] Setting…

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## [Node-red-contrib-unfluff causes NR to crash with an 'Uncaught Exception'](https://discourse.nodered.org/t/node-red-contrib-unfluff-causes-nr-to-crash-with-an-uncaught-exception/86104)

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**Author:** [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Replies:** 0\
**Last updated:** [3 March 2024 21:22 UTC](https://discourse.nodered.org/t/node-red-contrib-unfluff-causes-nr-to-crash-with-an-uncaught-exception/86104 "2024-03-03T21:22:04Z")

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Node-RED version: v3.1.5 Node.js version: v18.12.1 After installing this node and trying to use it in a flow, it crashed NR 3 Mar 15:58:03 - \[red\] Uncaught Exception: 3 Mar 15:58:03 - \[error\] Error: certificate has e…

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## [Wheelchair navigation system using NodeRed dashboard and interactive maps](https://discourse.nodered.org/t/wheelchair-navigation-system-using-nodered-dashboard-and-interactive-maps/86085)

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**Author:** [@nsakellion](https://discourse.nodered.org/u/nsakellion)\
**Replies:** 3\
**Last updated:** [3 March 2024 14:36 UTC](https://discourse.nodered.org/t/wheelchair-navigation-system-using-nodered-dashboard-and-interactive-maps/86085 "2024-03-03T14:36:52Z")

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Hello, community!! For my thesis, I am to build this project for a wheelchair navigation system. Being a wheelchair user myself, I would love it if I could use a map application (GoogleMaps or similar), where I would be…

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## [Need to change 0's to 1 and 1's to 0](https://discourse.nodered.org/t/need-to-change-0s-to-1-and-1s-to-0/86082)

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**Author:** [@Goldog](https://discourse.nodered.org/u/Goldog)\
**Replies:** 7\
**Last updated:** [3 March 2024 13:05 UTC](https://discourse.nodered.org/t/need-to-change-0s-to-1-and-1s-to-0/86082 "2024-03-03T13:05:45Z")

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Hi, I'm a bit new to this and i'm having some issues in changing/replacing/inverting the messages from 0 to 1 / from 1 to 0. Its from some optocouplers that send a 0 when they are on and a 1 when they are off. I've tri…

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## [How can I convert 16 boolean values to an int16 value?](https://discourse.nodered.org/t/how-can-i-convert-16-boolean-values-to-an-int16-value/86090)

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**Author:** [@DiegoSB13](https://discourse.nodered.org/u/DiegoSB13)\
**Replies:** 1\
**Last updated:** [3 March 2024 12:07 UTC](https://discourse.nodered.org/t/how-can-i-convert-16-boolean-values-to-an-int16-value/86090 "2024-03-03T12:07:37Z")

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I have 16 boolean variables that I want to send like an int16 type value. Is it possible to do it with a function node? How?

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## [Modbus RS485 read errors?](https://discourse.nodered.org/t/modbus-rs485-read-errors/86070)

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**Author:** [@4711Austria](https://discourse.nodered.org/u/4711Austria)\
**Replies:** 8\
**Last updated:** [2 March 2024 07:33 UTC](https://discourse.nodered.org/t/modbus-rs485-read-errors/86070 "2024-03-02T07:33:27Z")

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Hello would need some hlp pls, to understand, where is my fault, thx! reading via RS485/USB Adapter from a BMS Batterypack. connected are 1/8 2/7 (no ground - does have a problem on pack off getting voltage) pallette…

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## [Receiving data from phone and camera sensors](https://discourse.nodered.org/t/receiving-data-from-phone-and-camera-sensors/86027)

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**Author:** [@tsuratolya](https://discourse.nodered.org/u/tsuratolya)\
**Replies:** 4\
**Last updated:** [2 March 2024 01:30 UTC](https://discourse.nodered.org/t/receiving-data-from-phone-and-camera-sensors/86027 "2024-03-02T01:30:19Z")

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Description: The task is to obtain data from sensors and build graphs. there is an application on the phone - ip webcam. It can output photos, videos and phone sensor data. Problem: I receive gyroscope data from my ph…

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## [Close chrome window with button](https://discourse.nodered.org/t/close-chrome-window-with-button/86064)

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**Author:** [@lucianv](https://discourse.nodered.org/u/lucianv)\
**Replies:** 2\
**Last updated:** [2 March 2024 00:47 UTC](https://discourse.nodered.org/t/close-chrome-window-with-button/86064 "2024-03-02T00:47:55Z")

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Hi, i search a lot but I was not able to find a way to close the page (chrome) using a button from dashboard. Basically I want to have a button called exit which when cliked to close the page. Is that possible to achie…

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## [NR 'write file' node \[storage\] Q / request](https://discourse.nodered.org/t/nr-write-file-node-storage-q-request/86044)

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**Author:** [@StrongTown](https://discourse.nodered.org/u/StrongTown)\
**Replies:** 9\
**Last updated:** [1 March 2024 22:10 UTC](https://discourse.nodered.org/t/nr-write-file-node-storage-q-request/86044 "2024-03-01T22:10:46Z")

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Is it possible to ask how, or if not currently included, ask to add, the ability to set this node with an option to write to top of file instead of always (only) appending to end? This would be very helpful with log fi…

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## [Approach for signing message with HMAC (any recommendation for third party node?)](https://discourse.nodered.org/t/approach-for-signing-message-with-hmac-any-recommendation-for-third-party-node/86058)

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**Author:** [@escapist3734](https://discourse.nodered.org/u/escapist3734)\
**Replies:** 2\
**Last updated:** [1 March 2024 19:05 UTC](https://discourse.nodered.org/t/approach-for-signing-message-with-hmac-any-recommendation-for-third-party-node/86058 "2024-03-01T19:05:15Z")

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Hi! I have a Python script that I would like to integrate into Node-RED. Essentially, it signs a message with HMAC/SHA256. So far, I've attempted to implement Crypto-JS to create a function in Node-RED. However, this a…

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## [Problem comparing dates](https://discourse.nodered.org/t/problem-comparing-dates/86054)

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**Author:** [@Tinbum1](https://discourse.nodered.org/u/Tinbum1)\
**Replies:** 10\
**Last updated:** [1 March 2024 18:34 UTC](https://discourse.nodered.org/t/problem-comparing-dates/86054 "2024-03-01T18:34:34Z")

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I'm trying to pull a date from an online database and compare it with today's date. I can get the data ok but for some reason in the function node the date format is being changed. I'm in the UK and use dd/mm/yyyy but fo…

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## [Raspberry Pi supported versions](https://discourse.nodered.org/t/raspberry-pi-supported-versions/86052)

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**Author:** [@grawsom](https://discourse.nodered.org/u/grawsom)\
**Replies:** 3\
**Last updated:** [1 March 2024 16:11 UTC](https://discourse.nodered.org/t/raspberry-pi-supported-versions/86052 "2024-03-01T16:11:16Z")

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Is there somewhere where you can the supported version OS/NR. So I can see strech, buster, bullseye highests NR versions that can be installed

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## [New install of Node-RED broke modbus](https://discourse.nodered.org/t/new-install-of-node-red-broke-modbus/86036)

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**Author:** [@hotdog](https://discourse.nodered.org/u/hotdog)\
**Replies:** 17\
**Last updated:** [1 March 2024 15:01 UTC](https://discourse.nodered.org/t/new-install-of-node-red-broke-modbus/86036 "2024-03-01T15:01:06Z")

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I have been working through a RPi with node red v3.0.2 for a few weeks now but recently I needed to set up a new pi and import my flows to it. However, after installing a fresh install on a new sd, my flows aren't passin…

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