# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=125

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

**Page:** 126

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## [Node-red-contrib-arp not filtering vol2](https://discourse.nodered.org/t/node-red-contrib-arp-not-filtering-vol2/86250)

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**Author:** [@meelismei](https://discourse.nodered.org/u/meelismei)\
**Replies:** 1\
**Last updated:** [8 March 2024 14:51 UTC](https://discourse.nodered.org/t/node-red-contrib-arp-not-filtering-vol2/86250 "2024-03-08T14:51:50Z")

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I had a problem with node Node-red-contrib-arp, which after installing ND v3.1.6 no longer works as it should. When I put a MAC address in the node, there is no filtering on output. According to the guide, the output c…

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## [What about Node-Red 4?](https://discourse.nodered.org/t/what-about-node-red-4/86274)

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**Author:** [@crisconru](https://discourse.nodered.org/u/crisconru)\
**Replies:** 3\
**Last updated:** [8 March 2024 14:18 UTC](https://discourse.nodered.org/t/what-about-node-red-4/86274 "2024-03-08T14:18:52Z")

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Hi mates, Maybe I am lost but I cannot find any information about this. What about Node-Red next major version? Is it expected? Any news? I think at least in next minor versions Node version should be upgrade to Node 2…

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## [How do add new user login web node-red](https://discourse.nodered.org/t/how-do-add-new-user-login-web-node-red/86260)

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**Author:** [@vanhaiit90](https://discourse.nodered.org/u/vanhaiit90)\
**Replies:** 1\
**Last updated:** [8 March 2024 10:26 UTC](https://discourse.nodered.org/t/how-do-add-new-user-login-web-node-red/86260 "2024-03-08T10:26:37Z")

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How do I create a user different from the admin user and change the password for the admin. Help me. I have configured with the commandline: \*\*node-red admin hash-pw\*\*and add text password hash in the setting.js with us…

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## [The workspace contains some unknown node types:server](https://discourse.nodered.org/t/the-workspace-contains-some-unknown-node-types-server/86266)

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**Author:** [@mirhanozdemir](https://discourse.nodered.org/u/mirhanozdemir)\
**Replies:** 4\
**Last updated:** [8 March 2024 10:22 UTC](https://discourse.nodered.org/t/the-workspace-contains-some-unknown-node-types-server/86266 "2024-03-08T10:22:25Z")

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Hi to all, I am having an error of "The workspace contains some unknown node types:server". Could you please help me about how can i solve this error? Thank you.

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## [CUPS printer buffer](https://discourse.nodered.org/t/cups-printer-buffer/86251)

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**Author:** [@madmax](https://discourse.nodered.org/u/madmax)\
**Replies:** 1\
**Last updated:** [7 March 2024 21:15 UTC](https://discourse.nodered.org/t/cups-printer-buffer/86251 "2024-03-07T21:15:54Z")

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Hello! I have a CUPS printer server. Is it possible to send a buffer directly to the printer server via Node Red?

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## [A tutorial on how to add a dropdown to the node edit properties of a subflow](https://discourse.nodered.org/t/a-tutorial-on-how-to-add-a-dropdown-to-the-node-edit-properties-of-a-subflow/86247)

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**Author:** [@mitch-shiver](https://discourse.nodered.org/u/mitch-shiver)\
**Replies:** 2\
**Last updated:** [7 March 2024 19:09 UTC](https://discourse.nodered.org/t/a-tutorial-on-how-to-add-a-dropdown-to-the-node-edit-properties-of-a-subflow/86247 "2024-03-07T19:09:31Z")

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Hi, I have created a custom node using a subflow. One of the fields that I want in the edit properties for the new node is a dropdown containing "up", "down", "left", "right" rather than requiring the user of the node to…

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## [Remote coding environments](https://discourse.nodered.org/t/remote-coding-environments/86227)

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**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 2\
**Last updated:** [7 March 2024 17:06 UTC](https://discourse.nodered.org/t/remote-coding-environments/86227 "2024-03-07T17:06:10Z")

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Hi all, For anyone who might have a need to remotely edit code on a server, there is a new open source product just released that lets you set one up very rapidly. I thought I'd share it in case anyone needs it. When u…

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## [Couldn't instal node-red-contrib-azure-iot-edge-module v1.0.4 on node-red 3.1.6](https://discourse.nodered.org/t/couldnt-instal-node-red-contrib-azure-iot-edge-module-v1-0-4-on-node-red-3-1-6/86242)

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**Author:** [@arseny-sandaar](https://discourse.nodered.org/u/arseny-sandaar)\
**Replies:** 1\
**Last updated:** [7 March 2024 15:08 UTC](https://discourse.nodered.org/t/couldnt-instal-node-red-contrib-azure-iot-edge-module-v1-0-4-on-node-red-3-1-6/86242 "2024-03-07T15:08:55Z")

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I have installed Node-RED as a IoT edge device module (docker image: nodered/node-red:3.1-debian) Node-RED is running on the host. I have installed several modules such as node-red-contrib-s7 v3.1.0 and node-red-dashbo…

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## [Screenshoot dashboard and generate a image](https://discourse.nodered.org/t/screenshoot-dashboard-and-generate-a-image/86200)

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**Author:** [@Erissin\_Industria4.0](https://discourse.nodered.org/u/Erissin_Industria4.0)\
**Replies:** 5\
**Last updated:** [7 March 2024 13:25 UTC](https://discourse.nodered.org/t/screenshoot-dashboard-and-generate-a-image/86200 "2024-03-07T13:25:09Z")

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I'm using a node that takes a print of the url you choose, and it has a function that allows you to choose the part of the print using the class of the object or the id, however whenever I generate the image with any cla…

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## [Starting from scratch](https://discourse.nodered.org/t/starting-from-scratch/86216)

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**Author:** [@Homerjsimpson137](https://discourse.nodered.org/u/Homerjsimpson137)\
**Replies:** 7\
**Last updated:** [7 March 2024 09:55 UTC](https://discourse.nodered.org/t/starting-from-scratch/86216 "2024-03-07T09:55:26Z")

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Is there a way to start from scratch with Node-Red? Meaning nothing is saved and all is deleted. Ive screwed up something that I had working so I deleted my deployed flow and shutdown everything and rebooted everything…

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## [Setting opc ua item via function node](https://discourse.nodered.org/t/setting-opc-ua-item-via-function-node/85697)

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**Author:** [@Timo7](https://discourse.nodered.org/u/Timo7)\
**Replies:** 1\
**Last updated:** [7 March 2024 09:51 UTC](https://discourse.nodered.org/t/setting-opc-ua-item-via-function-node/85697 "2024-03-07T09:51:32Z")

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Hi, i'm using the node-red-contrib-opcua library to access nodes from a siemens SPS. I have to read multiple id's from it. Now i want to dynamically pass the opc ua item with a function node. Is there a way to do it? T…

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## [How to define the endpoint for OPC-UA with payload?](https://discourse.nodered.org/t/how-to-define-the-endpoint-for-opc-ua-with-payload/85671)

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**Author:** [@ashiqzcc](https://discourse.nodered.org/u/ashiqzcc)\
**Replies:** 1\
**Last updated:** [7 March 2024 09:50 UTC](https://discourse.nodered.org/t/how-to-define-the-endpoint-for-opc-ua-with-payload/85671 "2024-03-07T09:50:26Z")

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I'm interested in knowing whether it's feasible to set the OPC UA client's endpoint dynamically using the payload. My goal is to simplify the code structure since I have more than 200 OPC UA clients.

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## [Detecting power is restored via MQTT](https://discourse.nodered.org/t/detecting-power-is-restored-via-mqtt/86188)

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**Author:** [@jsprenkle](https://discourse.nodered.org/u/jsprenkle)\
**Replies:** 4\
**Last updated:** [7 March 2024 09:34 UTC](https://discourse.nodered.org/t/detecting-power-is-restored-via-mqtt/86188 "2024-03-07T09:34:26Z")

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Good morning, I'd like to detect when power is restored to devices (using MQTT). My node-red and MQTT servers are on a battery backup. Any ideas other than watch for LWT messages? Thanks, Jay

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## [Use NodeRED as MQTT Bridge](https://discourse.nodered.org/t/use-nodered-as-mqtt-bridge/86162)

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**Author:** [@omem](https://discourse.nodered.org/u/omem)\
**Replies:** 10\
**Last updated:** [6 March 2024 18:21 UTC](https://discourse.nodered.org/t/use-nodered-as-mqtt-bridge/86162 "2024-03-06T18:21:07Z")

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Im trying to forward from MQTT in to MQTT out connection They on diffrent MQTT connections, (the input from hiveMQ broker and the the output is for AWS IoT core) why it is dosent work for me I also tried to add aFun…

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## [Node Red emailer and 0auth2- "ReferenceError: msg is not defined" function check](https://discourse.nodered.org/t/node-red-emailer-and-0auth2-referenceerror-msg-is-not-defined-function-check/86178)

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**Author:** [@hadwll](https://discourse.nodered.org/u/hadwll)\
**Replies:** 3\
**Last updated:** [7 March 2024 05:58 UTC](https://discourse.nodered.org/t/node-red-emailer-and-0auth2-referenceerror-msg-is-not-defined-function-check/86178 "2024-03-07T05:58:15Z")

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I have setup an email node with Oauth2 authentication, that side of it is working, I have got the access token ok. I am getting an error on deploy when from the email node itself. ("ReferenceError: msg is not defined") …

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## [Odd issue with Join node](https://discourse.nodered.org/t/odd-issue-with-join-node/86218)

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**Author:** [@0Nulls](https://discourse.nodered.org/u/0Nulls)\
**Replies:** 3\
**Last updated:** [7 March 2024 04:23 UTC](https://discourse.nodered.org/t/odd-issue-with-join-node/86218 "2024-03-07T04:23:20Z")

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For some reason, this one Join node won't Join the payloads. Here are a few screenshots: Since I can only do 2 screenshots since I'm new here, here's my current join node config Mode: Manual Combine each: msg.payload …

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## [Removing a module](https://discourse.nodered.org/t/removing-a-module/86204)

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**Author:** [@bithead](https://discourse.nodered.org/u/bithead)\
**Replies:** 3\
**Last updated:** [7 March 2024 00:02 UTC](https://discourse.nodered.org/t/removing-a-module/86204 "2024-03-07T00:02:12Z")

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I'm trying to remove a module from the node-red database. The module in question is ays-agent. I have a new module that better follows naming convention at @bithead/node-red-ays-server. Originally, I thought my module w…

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## [Air-gapped Node-RED instance - how to update palette and function node modules](https://discourse.nodered.org/t/air-gapped-node-red-instance-how-to-update-palette-and-function-node-modules/86195)

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**Author:** [@christopher-lambe](https://discourse.nodered.org/u/christopher-lambe)\
**Replies:** 4\
**Last updated:** [6 March 2024 20:08 UTC](https://discourse.nodered.org/t/air-gapped-node-red-instance-how-to-update-palette-and-function-node-modules/86195 "2024-03-06T20:08:28Z")

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I need to install Node-RED on a air-gapped server. Below is a brief overview of my standard way to install Node-RED as an enterprise system. I reckon if I install on a networked server and copied the node-red folder ove…

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## [NodeRED couldn´t install - Nodejs Bad install: Node.js missing](https://discourse.nodered.org/t/nodered-couldn-t-install-nodejs-bad-install-node-js-missing/86121)

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**Author:** [@Herbert](https://discourse.nodered.org/u/Herbert)\
**Replies:** 17\
**Last updated:** [6 March 2024 19:56 UTC](https://discourse.nodered.org/t/nodered-couldn-t-install-nodejs-bad-install-node-js-missing/86121 "2024-03-06T19:56:10Z")

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Hello, I have a fresh Raspberry Pi 32bit OS Bullseye with desktop. I have a failure while install process: This can take 20-30 minutes on the slower Pi versions - please wait. Stop Node-RED ✔ …

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## [Node-Red consuming 100% CPU](https://discourse.nodered.org/t/node-red-consuming-100-cpu/85979)

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**Author:** [@dr\_cave\_dweller](https://discourse.nodered.org/u/dr_cave_dweller)\
**Replies:** 8\
**Last updated:** [6 March 2024 19:35 UTC](https://discourse.nodered.org/t/node-red-consuming-100-cpu/85979 "2024-03-06T19:35:49Z")

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Hello, I have a strange problem I can not get to the bottom of. Firstly, I started using Node-Red a long time ago on a project that has morphed and grown, and in retrospect Node-Red ios the wrong approach, it has grown…

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## [How to make the dashboard-button in dashboard receive press&hold input](https://discourse.nodered.org/t/how-to-make-the-dashboard-button-in-dashboard-receive-press-hold-input/86205)

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**Author:** [@Long4](https://discourse.nodered.org/u/Long4)\
**Replies:** 5\
**Last updated:** [6 March 2024 19:34 UTC](https://discourse.nodered.org/t/how-to-make-the-dashboard-button-in-dashboard-receive-press-hold-input/86205 "2024-03-06T19:34:52Z")

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Hi I'm new to node-red and just learning how to make some simple application, I'd like to ask a few question 1/ How can I make the dashboard receive press and hold input? I can do press once, but I have no clue how to d…

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## [Cant ping from Flow](https://discourse.nodered.org/t/cant-ping-from-flow/86197)

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**Author:** [@Homerjsimpson137](https://discourse.nodered.org/u/Homerjsimpson137)\
**Replies:** 3\
**Last updated:** [6 March 2024 18:44 UTC](https://discourse.nodered.org/t/cant-ping-from-flow/86197 "2024-03-06T18:44:09Z")

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New to Node-Red but loving it so far. Got an issue on a flow that where I'm trying to ping my printer IP address or local host as Node-Red is installed locally on my windows PC. I can ping my printer from a windows CMD…

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## [Help with errors](https://discourse.nodered.org/t/help-with-errors/86194)

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**Author:** [@IanI](https://discourse.nodered.org/u/IanI)\
**Replies:** 2\
**Last updated:** [6 March 2024 16:56 UTC](https://discourse.nodered.org/t/help-with-errors/86194 "2024-03-06T16:56:02Z")

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I usually run Node-Red (3.1.6) (Node.js 20.11.1) as a service in Windows and so don't see the startup log. Today I had occasion to run from the command line and saw the following; Unhandled rejection Error: No sockets a…

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## [HELP extract data from object/json](https://discourse.nodered.org/t/help-extract-data-from-object-json/86168)

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**Author:** [@maury77](https://discourse.nodered.org/u/maury77)\
**Replies:** 5\
**Last updated:** [6 March 2024 16:09 UTC](https://discourse.nodered.org/t/help-extract-data-from-object-json/86168 "2024-03-06T16:09:44Z")

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Sorry but I have need to parse this object I want extra VolV for each element of array {"topic":"energy\_measurs","payload":{"serial":"A07766","measurs":\[{"phaseId":0,"voltV":223,"currentA":2.038,"powerW":364,"powerF…

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## [I need help again, problem with Object array with 3 values into a function node](https://discourse.nodered.org/t/i-need-help-again-problem-with-object-array-with-3-values-into-a-function-node/86164)

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**Author:** [@questuk](https://discourse.nodered.org/u/questuk)\
**Replies:** 11\
**Last updated:** [6 March 2024 13:30 UTC](https://discourse.nodered.org/t/i-need-help-again-problem-with-object-array-with-3-values-into-a-function-node/86164 "2024-03-06T13:30:18Z")

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Hi, What am I doing wrong, I have wasted hours trying to find out ! I only want the object array with 3 values to go into my database once. I have an object array with 3 values I also have another object wi…

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## [Create a database in nodered (bosch ctrlx core)](https://discourse.nodered.org/t/create-a-database-in-nodered-bosch-ctrlx-core/86183)

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**Author:** [@baboski](https://discourse.nodered.org/u/baboski)\
**Replies:** 8\
**Last updated:** [6 March 2024 10:30 UTC](https://discourse.nodered.org/t/create-a-database-in-nodered-bosch-ctrlx-core/86183 "2024-03-06T10:30:33Z")

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Hello, as i wrote in the title i need a database for my nodered application, my problem is that i'm using nodered on a particular offline machine in which i can't install others program except nodered so i can't use an e…

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## [How does zwave work with thermostats? And is LUX KONOz supported](https://discourse.nodered.org/t/how-does-zwave-work-with-thermostats-and-is-lux-konoz-supported/86175)

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**Author:** [@mchahn](https://discourse.nodered.org/u/mchahn)\
**Replies:** 2\
**Last updated:** [6 March 2024 10:18 UTC](https://discourse.nodered.org/t/how-does-zwave-work-with-thermostats-and-is-lux-konoz-supported/86175 "2024-03-06T10:18:07Z")

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I want to use a LUX KONO thermostat with an API. The wifi version doesn't support an API. Does anyone know if the zwave version will? And, do all ZWAVE thermostats support the full access features like room temp, sett…

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## [JSONata examples flows.node-red.org not working](https://discourse.nodered.org/t/jsonata-examples-flows-node-red-org-not-working/86179)

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**Author:** [@christopher-lambe](https://discourse.nodered.org/u/christopher-lambe)\
**Replies:** 1\
**Last updated:** [6 March 2024 08:45 UTC](https://discourse.nodered.org/t/jsonata-examples-flows-node-red-org-not-working/86179 "2024-03-06T08:45:49Z")

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Hi, I am tring to improve my JSONata skills (Yup, I'm a SQL guy loving JSONata aggregate functions...) So I downloaded the flows from https://flows.nodered.org/flow/29fd01f8a62fec86d875ecbd68001cb0 and tried them out. A…

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## [OR latch with a reset?](https://discourse.nodered.org/t/or-latch-with-a-reset/86167)

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**Author:** [@Goldog](https://discourse.nodered.org/u/Goldog)\
**Replies:** 3\
**Last updated:** [6 March 2024 01:19 UTC](https://discourse.nodered.org/t/or-latch-with-a-reset/86167 "2024-03-06T01:19:13Z")

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Hi, I have a project where I want to measure the pressure drop across a filter bank supplied by 2 pumps. I need either a function or group of nodes that trigger the pressure drop calculation flow 5 seconds after either…

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## ["TypeError: Cannot read properties of undefined (reading 'toString')" when sending reset to TCP node](https://discourse.nodered.org/t/typeerror-cannot-read-properties-of-undefined-reading-tostring-when-sending-reset-to-tcp-node/86176)

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**Author:** [@FloRu](https://discourse.nodered.org/u/FloRu)\
**Replies:** 3\
**Last updated:** [5 March 2024 23:45 UTC](https://discourse.nodered.org/t/typeerror-cannot-read-properties-of-undefined-reading-tostring-when-sending-reset-to-tcp-node/86176 "2024-03-05T23:45:31Z")

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Continuing the discussion from Force disconnection of TCP connection: Today I tried to disconnect the newly connected TCP request node (using 2 connections, one on port 1111 and the second to the same server, port 1112)…

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