# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=185

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

**Page:** 186

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## [Modbus massive reading](https://discourse.nodered.org/t/modbus-massive-reading/80493)

<div class="topic-metadata">

**Author:** [@Luca91](https://discourse.nodered.org/u/Luca91)\
**Replies:** 11\
**Last updated:** [18 August 2023 12:39 UTC](https://discourse.nodered.org/t/modbus-massive-reading/80493 "2023-08-18T12:39:05Z")

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Hi everyone. This is my first experience with Node-Red. Via node-red-contrib-modus I would like to read N registers of N devices. I know how to use these nodes to read the various registers individually, but I would l…

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## [Node-RED Failing to open](https://discourse.nodered.org/t/node-red-failing-to-open/80644)

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**Author:** [@gettmad](https://discourse.nodered.org/u/gettmad)\
**Replies:** 2\
**Last updated:** [18 August 2023 12:34 UTC](https://discourse.nodered.org/t/node-red-failing-to-open/80644 "2023-08-18T12:34:01Z")

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After implementing a 'Complete' node which is triggered upon an MQTT publish node, my Node-RED will no longer launch. When I use the 'node-red' command to launch, in the CMD window I see many error messages which my 'De…

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## [Interaction between NodeRED instances?](https://discourse.nodered.org/t/interaction-between-nodered-instances/80632)

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**Author:** [@Hunter](https://discourse.nodered.org/u/Hunter)\
**Replies:** 11\
**Last updated:** [18 August 2023 11:50 UTC](https://discourse.nodered.org/t/interaction-between-nodered-instances/80632 "2023-08-18T11:50:19Z")

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Hallo, I'm running 2 instances of NodeRED on NGINX in docker. One on port 1880, other on 1882. There are some events which I'd like to share from one instance to the other. What is the best way to do this? Kind regar…

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## [Invalid endpoint parameters when using node-red-contrib-opcua](https://discourse.nodered.org/t/invalid-endpoint-parameters-when-using-node-red-contrib-opcua/80502)

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**Author:** [@LaudemPax](https://discourse.nodered.org/u/LaudemPax)\
**Replies:** 14\
**Last updated:** [18 August 2023 11:03 UTC](https://discourse.nodered.org/t/invalid-endpoint-parameters-when-using-node-red-contrib-opcua/80502 "2023-08-18T11:03:23Z")

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I've tried with many different servers and with different configurations but no matter what I try, I cannot get the connection to the OPCUA server to work. As a clean testing environment, I'm attempting to connect to Pro…

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## [UI Control Node - Hide all TABS, Display only a few](https://discourse.nodered.org/t/ui-control-node-hide-all-tabs-display-only-a-few/80609)

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**Author:** [@eddee54455](https://discourse.nodered.org/u/eddee54455)\
**Replies:** 9\
**Last updated:** [17 August 2023 19:09 UTC](https://discourse.nodered.org/t/ui-control-node-hide-all-tabs-display-only-a-few/80609 "2023-08-17T19:09:40Z")

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Hi All, Is there a way to hide all tabs (Using a wildcard) using the UI Control node, then selectively only "unhiding" individual tabs that I want to be available, all in a single payload to the UI Control node if possi…

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## [Node-red-node-email - Send mail to multiple recipient](https://discourse.nodered.org/t/node-red-node-email-send-mail-to-multiple-recipient/80628)

<div class="topic-metadata">

**Author:** [@exarkun](https://discourse.nodered.org/u/exarkun)\
**Replies:** 1\
**Last updated:** [17 August 2023 16:30 UTC](https://discourse.nodered.org/t/node-red-node-email-send-mail-to-multiple-recipient/80628 "2023-08-17T16:30:13Z")

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Good morning, I am trying to use the node-red-node-email to send an email to multiple recipients. If I use the brick for a single recipient, the body of the email in html (payload) is taken into account correctly and …

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## [Combining arrays into an array of arrays OR removing empty string elements from an array](https://discourse.nodered.org/t/combining-arrays-into-an-array-of-arrays-or-removing-empty-string-elements-from-an-array/80578)

<div class="topic-metadata">

**Author:** [@gettmad](https://discourse.nodered.org/u/gettmad)\
**Replies:** 7\
**Last updated:** [17 August 2023 13:27 UTC](https://discourse.nodered.org/t/combining-arrays-into-an-array-of-arrays-or-removing-empty-string-elements-from-an-array/80578 "2023-08-17T13:27:42Z")

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Hello, This is more of a coding question then a direct concern with Node-RED however I would greatly appreciate the help. I am using Node-RED to publish topics to MQTT from a report. As a result I am required to manipu…

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## [Get value from an object with complex title](https://discourse.nodered.org/t/get-value-from-an-object-with-complex-title/80622)

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**Author:** [@Lars-the-tinkerer](https://discourse.nodered.org/u/Lars-the-tinkerer)\
**Replies:** 2\
**Last updated:** [17 August 2023 12:29 UTC](https://discourse.nodered.org/t/get-value-from-an-object-with-complex-title/80622 "2023-08-17T12:29:03Z")

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I'm sorry if this has been answered already but I can't seem to find my specific case. I fetch values from an SQL database and want to use these in graphs and charts of the dashboard module. For some values I sum variou…

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## [Are there any limitations on sending variables between Node-RED and influxDB?](https://discourse.nodered.org/t/are-there-any-limitations-on-sending-variables-between-node-red-and-influxdb/80585)

<div class="topic-metadata">

**Author:** [@Marsantos](https://discourse.nodered.org/u/Marsantos)\
**Replies:** 12\
**Last updated:** [17 August 2023 12:16 UTC](https://discourse.nodered.org/t/are-there-any-limitations-on-sending-variables-between-node-red-and-influxdb/80585 "2023-08-17T12:16:38Z")

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I'm using Node-Red to send data from a PLC to InfluxDB and later display it in Grafana. However, I am in doubt about the number of variables, if there is any limitation of Node-Red regarding the number of variables.

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## [Authentication Context Within Flows](https://discourse.nodered.org/t/authentication-context-within-flows/80615)

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**Author:** [@WillSams](https://discourse.nodered.org/u/WillSams)\
**Replies:** 0\
**Last updated:** [16 August 2023 20:15 UTC](https://discourse.nodered.org/t/authentication-context-within-flows/80615 "2023-08-16T20:15:47Z")

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I'm running into an issue w/ Node-Red authentication. Context: I have JSON data coming from a data source with tags filtered by roles. I.e., role A can only see tags X, Y, Z and role B can see tags A, B, C. I want t…

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## [Deploy Hanging when using HTTPS Request node](https://discourse.nodered.org/t/deploy-hanging-when-using-https-request-node/79581)

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**Author:** [@GregHNZ](https://discourse.nodered.org/u/GregHNZ)\
**Replies:** 9\
**Last updated:** [16 August 2023 19:58 UTC](https://discourse.nodered.org/t/deploy-hanging-when-using-https-request-node/79581 "2023-08-16T19:58:01Z")

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We have recently moved for Public to Private certificates for our internal servers. Up to the change over point we had no problems connecting HTTP Request nodes to our ERP servers to consume ODATA feeds but now we get "…

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## [Accessing object data](https://discourse.nodered.org/t/accessing-object-data/80611)

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**Author:** [@sepp](https://discourse.nodered.org/u/sepp)\
**Replies:** 2\
**Last updated:** [16 August 2023 19:17 UTC](https://discourse.nodered.org/t/accessing-object-data/80611 "2023-08-16T19:17:24Z")

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hi, i am using contrib-enocean lib to encode incomming enocean datatelegramm. no i have a basecly question how to access/qualify data in dies decoded telegrammessage. for example iwant to make visible marked value i…

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## [Remove / delete flow from "Local"](https://discourse.nodered.org/t/remove-delete-flow-from-local/80613)

<div class="topic-metadata">

**Author:** [@Sayen](https://discourse.nodered.org/u/Sayen)\
**Replies:** 1\
**Last updated:** [16 August 2023 19:13 UTC](https://discourse.nodered.org/t/remove-delete-flow-from-local/80613 "2023-08-16T19:13:23Z")

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I did add some flows to the local Flows Import/export Tab. But i cant find out how to delete them. :see\_no\_evil: Where is the delete/remove button? :sweat\_smile: Can someone help?

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## [Uibuilder V6 library integratin](https://discourse.nodered.org/t/uibuilder-v6-library-integratin/80497)

<div class="topic-metadata">

**Author:** [@ChrisWeb71](https://discourse.nodered.org/u/ChrisWeb71)\
**Replies:** 5\
**Last updated:** [16 August 2023 16:26 UTC](https://discourse.nodered.org/t/uibuilder-v6-library-integratin/80497 "2023-08-16T16:26:29Z")

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I am using Niode-Red 3.0.2 and UIBuilder 6.4.1 how can I insert the libraries so that the standard example works? I get the following error message in the debug window: "\[uibuilder:socket:addNs:uib-dynamic-svg-eg\] Soc…

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## [Node dmxusbpro generates errors when installing](https://discourse.nodered.org/t/node-dmxusbpro-generates-errors-when-installing/80608)

<div class="topic-metadata">

**Author:** [@alexander77](https://discourse.nodered.org/u/alexander77)\
**Replies:** 0\
**Last updated:** [16 August 2023 11:42 UTC](https://discourse.nodered.org/t/node-dmxusbpro-generates-errors-when-installing/80608 "2023-08-16T11:42:33Z")

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Hi, i tried to add the node dmxusbpro as well to a windows pc and also to a raspberry. Fails in both machines witch a lot of errors reported. I looked int github and found the following: Hello! I'm reviving this threa…

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## [Are Flows Stored In A Cache?](https://discourse.nodered.org/t/are-flows-stored-in-a-cache/80582)

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**Author:** [@Light2K95](https://discourse.nodered.org/u/Light2K95)\
**Replies:** 10\
**Last updated:** [16 August 2023 11:09 UTC](https://discourse.nodered.org/t/are-flows-stored-in-a-cache/80582 "2023-08-16T11:09:07Z")

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Hello, I've been using a MongoDB collection instead of local flow.json file to store flows in Node Red. My problem is that when I change the flows in the database manually, changes doesn't reflect to editor. Despite the…

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## [Mqtt broker in flowforge](https://discourse.nodered.org/t/mqtt-broker-in-flowforge/80592)

<div class="topic-metadata">

**Author:** [@PRABHAKAR82](https://discourse.nodered.org/u/PRABHAKAR82)\
**Replies:** 2\
**Last updated:** [16 August 2023 09:34 UTC](https://discourse.nodered.org/t/mqtt-broker-in-flowforge/80592 "2023-08-16T09:34:04Z")

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Is it possible to publish data in aedes mqtt broker on flowforge node-red instance or I have to use cloud mqtt like HiveMQ?

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## [@leipert/node-red-contrib-stock-ticker does not work anymore](https://discourse.nodered.org/t/leipert-node-red-contrib-stock-ticker-does-not-work-anymore/79797)

<div class="topic-metadata">

**Author:** [@Nilpferd](https://discourse.nodered.org/u/Nilpferd)\
**Replies:** 13\
**Last updated:** [16 August 2023 08:57 UTC](https://discourse.nodered.org/t/leipert-node-red-contrib-stock-ticker-does-not-work-anymore/79797 "2023-08-16T08:57:49Z")

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NR3 with stock-ticker 2.0: I got the data from Yahoo since the last few month. Since yesterday no more data appear. Does anybody know if there ist a limit with Yahoo finance and if how I can increase? Erwin

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## [Node Red Server Sent Events](https://discourse.nodered.org/t/node-red-server-sent-events/80378)

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**Author:** [@Josh](https://discourse.nodered.org/u/Josh)\
**Replies:** 3\
**Last updated:** [16 August 2023 08:04 UTC](https://discourse.nodered.org/t/node-red-server-sent-events/80378 "2023-08-16T08:04:17Z")

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Hi, I am using @tq-bit/node-red-contrib-server-sent-events : sse-server (node-red-contrib-server-sent-events (node) - Node-RED). I have setup a small flow , But Im unable to receive the message in the data. Can anyone …

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## [Getting docx to pdf with Adobe Document Generation](https://discourse.nodered.org/t/getting-docx-to-pdf-with-adobe-document-generation/80591)

<div class="topic-metadata">

**Author:** [@aleyynademir](https://discourse.nodered.org/u/aleyynademir)\
**Replies:** 0\
**Last updated:** [15 August 2023 21:26 UTC](https://discourse.nodered.org/t/getting-docx-to-pdf-with-adobe-document-generation/80591 "2023-08-15T21:26:44Z")

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Taking a json file from the company's environment, taking a template from the company's issues (docx) in the same way, merging them into pdf. I am trying to convert. First I get the token, then the AssetId is given to m…

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## [Why does node.send(msg) work, but cannot return msg as normal?](https://discourse.nodered.org/t/why-does-node-send-msg-work-but-cannot-return-msg-as-normal/80587)

<div class="topic-metadata">

**Author:** [@hazymat](https://discourse.nodered.org/u/hazymat)\
**Replies:** 1\
**Last updated:** [15 August 2023 19:55 UTC](https://discourse.nodered.org/t/why-does-node-send-msg-work-but-cannot-return-msg-as-normal/80587 "2023-08-15T19:55:34Z")

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Bit of a strange one here. I have this block of code below: if (msg.payload.event == "single") { var touchpanelIDclicked = msg.topic.split("/")\[2\] var screenIDclicked = msg.payload.screen var tileIDclicked = msg.p…

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## [How to encrypt flow?](https://discourse.nodered.org/t/how-to-encrypt-flow/80581)

<div class="topic-metadata">

**Author:** [@S0T0](https://discourse.nodered.org/u/S0T0)\
**Replies:** 4\
**Last updated:** [15 August 2023 16:03 UTC](https://discourse.nodered.org/t/how-to-encrypt-flow/80581 "2023-08-15T16:03:27Z")

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Is it possible to encrypt the flow? My goal is to prevent reading and editing of the flow. So encrypt individual json files with the project.

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## [Batch + Join = Memory Leak?](https://discourse.nodered.org/t/batch-join-memory-leak/80577)

<div class="topic-metadata">

**Author:** [@gregorius](https://discourse.nodered.org/u/gregorius)\
**Replies:** 5\
**Last updated:** [15 August 2023 15:16 UTC](https://discourse.nodered.org/t/batch-join-memory-leak/80577 "2023-08-15T15:16:19Z")

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Hi There! I was debugging a memory leak in Node-RED and found that a combination of batch and join creates a memory leak. Obviously the combination of batch and join might not be necessary in this case but it demonstrat…

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## [Importing flows with 300+ dashboard nodes](https://discourse.nodered.org/t/importing-flows-with-300-dashboard-nodes/80562)

<div class="topic-metadata">

**Author:** [@juntiedt](https://discourse.nodered.org/u/juntiedt)\
**Replies:** 7\
**Last updated:** [15 August 2023 15:00 UTC](https://discourse.nodered.org/t/importing-flows-with-300-dashboard-nodes/80562 "2023-08-15T15:00:06Z")

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I am moving my big heat management application to bullseye (finally). After I installed node-red I loaded my backup into node-red. This works ok. But then I have to click each dashboard node in oder to deploy without an …

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## [Fatal error: cannot acces dashboard](https://discourse.nodered.org/t/fatal-error-cannot-acces-dashboard/79893)

<div class="topic-metadata">

**Author:** [@Observatory\_Gromme](https://discourse.nodered.org/u/Observatory_Gromme)\
**Replies:** 7\
**Last updated:** [15 August 2023 14:47 UTC](https://discourse.nodered.org/t/fatal-error-cannot-acces-dashboard/79893 "2023-08-15T14:47:45Z")

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Dear All, I was working with my node-red application and installing an old flow with out the palettes installed. When installing some philips Hue nodes suddenly node-red crashed and can not start up again. Got en erro…

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## [How to Export flows as a message](https://discourse.nodered.org/t/how-to-export-flows-as-a-message/80559)

<div class="topic-metadata">

**Author:** [@Light2K95](https://discourse.nodered.org/u/Light2K95)\
**Replies:** 12\
**Last updated:** [15 August 2023 13:39 UTC](https://discourse.nodered.org/t/how-to-export-flows-as-a-message/80559 "2023-08-15T13:39:31Z")

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Hi, As far as I know Node Red editor saves the current flow(the flow you see when you open the editor) in flows.json file inside C/\[username\]/.node-red folder by default. Can I force it to read and display the flow fro…

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## [Comparing payloads of MQTT-strings](https://discourse.nodered.org/t/comparing-payloads-of-mqtt-strings/80538)

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**Author:** [@Werner](https://discourse.nodered.org/u/Werner)\
**Replies:** 25\
**Last updated:** [15 August 2023 11:19 UTC](https://discourse.nodered.org/t/comparing-payloads-of-mqtt-strings/80538 "2023-08-15T11:19:47Z")

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I know how to change topics with the change-node, and how to compare their payloads afterwards. But I want to use the function-node for this. I have this topic: "home/auto/beschattung" and want to replace it with "abesc…

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## [Serial port connection error after deploy](https://discourse.nodered.org/t/serial-port-connection-error-after-deploy/80561)

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**Author:** [@Webastian](https://discourse.nodered.org/u/Webastian)\
**Replies:** 8\
**Last updated:** [15 August 2023 10:25 UTC](https://discourse.nodered.org/t/serial-port-connection-error-after-deploy/80561 "2023-08-15T10:25:53Z")

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Hi guys, I am using Node-Red v3.0.2, Node.js v20.5.1 and node-red-node-serialport 1.0.4. When I start Node-Red the connection works fine. As soon as I deploy Node-Red it tries to re-establish the serial connection. But…

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## [Security and node-red](https://discourse.nodered.org/t/security-and-node-red/80568)

<div class="topic-metadata">

**Author:** [@Manuel\_o](https://discourse.nodered.org/u/Manuel_o)\
**Replies:** 2\
**Last updated:** [15 August 2023 01:12 UTC](https://discourse.nodered.org/t/security-and-node-red/80568 "2023-08-15T01:12:23Z")

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I am aware that there are numerous valuable guides and articles available concerning the security of Node-RED. I have extensively perused many of these resources and endeavored, to the best of my ability, to adhere to th…

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## [Updating, nodejs, and other things](https://discourse.nodered.org/t/updating-nodejs-and-other-things/80479)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 46\
**Last updated:** [15 August 2023 00:48 UTC](https://discourse.nodered.org/t/updating-nodejs-and-other-things/80479 "2023-08-15T00:48:00Z")

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Sorry folks, I know this is a well traveled road. Most of my machines I use a lot are up to date with NR 3.x. Lately I've dug up some older machines and they have NR 1.8x on them. (RasPies too.) And the machine is r…

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