# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=488

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

**Page:** 489

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## [Can HTTP Request nodes send GET requests to their own server?](https://discourse.nodered.org/t/can-http-request-nodes-send-get-requests-to-their-own-server/51723)

<div class="topic-metadata">

**Author:** [@rozek](https://discourse.nodered.org/u/rozek)\
**Replies:** 2\
**Last updated:** [1 October 2021 02:35 UTC](https://discourse.nodered.org/t/can-http-request-nodes-send-get-requests-to-their-own-server/51723 "2021-10-01T02:35:23Z")

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Hello, I have a strange problem: I'm trying to send a GET request from within Node-RED to an HTTP entry point provided by Node-RED itself. Using Postman, that entry point successfully receives the request, but when tri…

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## [Infinity as a Number](https://discourse.nodered.org/t/infinity-as-a-number/51736)

<div class="topic-metadata">

**Author:** [@HaroldPetersInskipp](https://discourse.nodered.org/u/HaroldPetersInskipp)\
**Replies:** 3\
**Last updated:** [30 September 2021 23:38 UTC](https://discourse.nodered.org/t/infinity-as-a-number/51736 "2021-09-30T23:38:26Z")

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When using an "inject node" with msg.payload set to Number in the drop down menu, if the value is set to Infinity Node-RED will place a Triangle on that node and state that the property is invalid. Every time I try to de…

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## [Node Red GUI Behind a VPN but allow inbound call in outside of VPN](https://discourse.nodered.org/t/node-red-gui-behind-a-vpn-but-allow-inbound-call-in-outside-of-vpn/51729)

<div class="topic-metadata">

**Author:** [@HarryPottar](https://discourse.nodered.org/u/HarryPottar)\
**Replies:** 2\
**Last updated:** [30 September 2021 19:39 UTC](https://discourse.nodered.org/t/node-red-gui-behind-a-vpn-but-allow-inbound-call-in-outside-of-vpn/51729 "2021-09-30T19:39:24Z")

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HI, Is there two separate ports node red runs on? one for inbound traffic and one for GUI? We have node red deployed in the cloud. We changed the default port in the settings file and running https, secured behind auth…

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## [HC-SR04 ultrasonic sensor - manual function](https://discourse.nodered.org/t/hc-sr04-ultrasonic-sensor-manual-function/51686)

<div class="topic-metadata">

**Author:** [@7Non](https://discourse.nodered.org/u/7Non)\
**Replies:** 4\
**Last updated:** [30 September 2021 19:37 UTC](https://discourse.nodered.org/t/hc-sr04-ultrasonic-sensor-manual-function/51686 "2021-09-30T19:37:08Z")

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Good morning sir, is there any possible to make a flow on node-red manually without using rpi-srf. This flow should exactly do the work of rpi-srf. That sounds not a logic question but I am trying to connect that sensor…

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## [Error installing node-red-node-arduino on Windows 10](https://discourse.nodered.org/t/error-installing-node-red-node-arduino-on-windows-10/51722)

<div class="topic-metadata">

**Author:** [@gyan](https://discourse.nodered.org/u/gyan)\
**Replies:** 5\
**Last updated:** [30 September 2021 19:07 UTC](https://discourse.nodered.org/t/error-installing-node-red-node-arduino-on-windows-10/51722 "2021-09-30T19:07:05Z")

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I was trying to follow the instruction at Interacting with Arduino : Node-RED to interface arduino with node-red. Until now, I've installed node-red, and loaded the firmata firmware on the board. When I'm trying to inst…

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## [Uibuilder v2.0.3](https://discourse.nodered.org/t/uibuilder-v2-0-3/51713)

<div class="topic-metadata">

**Author:** [@magicman](https://discourse.nodered.org/u/magicman)\
**Replies:** 9\
**Last updated:** [30 September 2021 18:53 UTC](https://discourse.nodered.org/t/uibuilder-v2-0-3/51713 "2021-09-30T18:53:09Z")

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Hi i have just updated to Uibuilder V2.0.3 and using the vue template i used to enter my variables here: const app = new Vue({ el: '#app', data() { return { startMsg : 'Vue has started, waiting for mess…

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## [Aedes MQTT Broker dropping out 3-4 times per minute](https://discourse.nodered.org/t/aedes-mqtt-broker-dropping-out-3-4-times-per-minute/51707)

<div class="topic-metadata">

**Author:** [@Calendil](https://discourse.nodered.org/u/Calendil)\
**Replies:** 4\
**Last updated:** [30 September 2021 15:55 UTC](https://discourse.nodered.org/t/aedes-mqtt-broker-dropping-out-3-4-times-per-minute/51707 "2021-09-30T15:55:56Z")

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Hello All, I am using Aedes Node in NR as MQTT broker. (Pi Zero as NR Server). My internal and external MQTT listeners are getting disconnected from broker 3-4 times a minute. Is that an issue of this particular node …

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## [Setting the key of an object to the value of an variable](https://discourse.nodered.org/t/setting-the-key-of-an-object-to-the-value-of-an-variable/51714)

<div class="topic-metadata">

**Author:** [@juntiedt](https://discourse.nodered.org/u/juntiedt)\
**Replies:** 2\
**Last updated:** [30 September 2021 12:39 UTC](https://discourse.nodered.org/t/setting-the-key-of-an-object-to-the-value-of-an-variable/51714 "2021-09-30T12:39:04Z")

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msg.payload = myObject('DGWZ\_temp\_offset'); node.send(msg); return null; function myObject(key){ let value = global.get(key); return = {key.valueOf():value}; ???????? } result should be {'DGWZ\_temp\_offset':val…

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## [Http request to machine's screen mirror](https://discourse.nodered.org/t/http-request-to-machines-screen-mirror/51388)

<div class="topic-metadata">

**Author:** [@lastheim](https://discourse.nodered.org/u/lastheim)\
**Replies:** 14\
**Last updated:** [30 September 2021 12:12 UTC](https://discourse.nodered.org/t/http-request-to-machines-screen-mirror/51388 "2021-09-30T12:12:46Z")

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Hi, Im trying to get values from my boiler via its web screen mirror/GUI When I send the GET request directly to main resource the output is non-readable and not the html doc I was expecting How should I configure the…

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## [How to send a data from PHP Script to node-red dashboard](https://discourse.nodered.org/t/how-to-send-a-data-from-php-script-to-node-red-dashboard/51554)

<div class="topic-metadata">

**Author:** [@Ghoond](https://discourse.nodered.org/u/Ghoond)\
**Replies:** 14\
**Last updated:** [30 September 2021 11:08 UTC](https://discourse.nodered.org/t/how-to-send-a-data-from-php-script-to-node-red-dashboard/51554 "2021-09-30T11:08:19Z")

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Hi everyone, So i've been working on a project about IoT, and currently im using arduino for my project, especially ESP32-Cam for monitoring plants. And since im new using Node-Red is there are a way to send a data from…

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## [Insert Into MySQL table](https://discourse.nodered.org/t/insert-into-mysql-table/51698)

<div class="topic-metadata">

**Author:** [@JayDLL](https://discourse.nodered.org/u/JayDLL)\
**Replies:** 4\
**Last updated:** [30 September 2021 09:42 UTC](https://discourse.nodered.org/t/insert-into-mysql-table/51698 "2021-09-30T09:42:36Z")

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Hello everyone, Sorry to have to ask, but I am new to node-red and I am pulling my hair out with this one! I know it's not hard to do this, still, I just can't get it to work. I have a really simple flow, the image is…

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## [Node that will repeat the action just in case](https://discourse.nodered.org/t/node-that-will-repeat-the-action-just-in-case/51696)

<div class="topic-metadata">

**Author:** [@FormBurden](https://discourse.nodered.org/u/FormBurden)\
**Replies:** 3\
**Last updated:** [30 September 2021 08:34 UTC](https://discourse.nodered.org/t/node-that-will-repeat-the-action-just-in-case/51696 "2021-09-30T08:34:59Z")

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Hey all, New to this whole Node-Red thing, really awesome stuff. I'm looking for some kind of node that can repeat the action that just went off. I'm running into issues with my lights that are behind walls and the Bri…

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## [How to Catch "msg : error"?](https://discourse.nodered.org/t/how-to-catch-msg-error/51657)

<div class="topic-metadata">

**Author:** [@Lueftermann](https://discourse.nodered.org/u/Lueftermann)\
**Replies:** 4\
**Last updated:** [30 September 2021 06:26 UTC](https://discourse.nodered.org/t/how-to-catch-msg-error/51657 "2021-09-30T06:26:45Z")

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Hello, I have establish communication between my PLC (Eaton E4) and an OPCUA Server. I think everything works fine. But in case of losing conncection to my PLC my console gives me "msg : error", I tried to catch it with…

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## [What do people use for "long term trending and visualisation"?](https://discourse.nodered.org/t/what-do-people-use-for-long-term-trending-and-visualisation/51537)

<div class="topic-metadata">

**Author:** [@steirx](https://discourse.nodered.org/u/steirx)\
**Replies:** 18\
**Last updated:** [30 September 2021 05:09 UTC](https://discourse.nodered.org/t/what-do-people-use-for-long-term-trending-and-visualisation/51537 "2021-09-30T05:09:46Z")

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hi all, I had been contemplating a couple of times, how other users address the issue of "visualising long term trends.". I kind of have even difficulty to properly describe what I am looking for as trending, logging an…

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## [Help how to work with \`string\` node](https://discourse.nodered.org/t/help-how-to-work-with-string-node/51691)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 2\
**Last updated:** [30 September 2021 02:58 UTC](https://discourse.nodered.org/t/help-how-to-work-with-string-node/51691 "2021-09-30T02:58:48Z")

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Problem: Incoming message: rgb,x,r,g,b limits: x 0 - 7 r,g,b 0 - 255 This is the base flow: \[{"id":"33f88dd62e9a1854","type":"string","z":"65c9b63cb09879a0","name":"","methods":\[{"name":"delLeftMost","params":\[{"t…

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## [Creating nodes (sensors) dynamically?](https://discourse.nodered.org/t/creating-nodes-sensors-dynamically/51673)

<div class="topic-metadata">

**Author:** [@ChristophCaina](https://discourse.nodered.org/u/ChristophCaina)\
**Replies:** 5\
**Last updated:** [30 September 2021 00:48 UTC](https://discourse.nodered.org/t/creating-nodes-sensors-dynamically/51673 "2021-09-30T00:48:42Z")

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Hi all, I am trying to build a basic monitoring for my Proxmox Host with Node-Red. I am able to access the API from Proxmox and get a list of all available containers and their information... These information will be…

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## [Using variables in an array](https://discourse.nodered.org/t/using-variables-in-an-array/51692)

<div class="topic-metadata">

**Author:** [@tfuchs1987](https://discourse.nodered.org/u/tfuchs1987)\
**Replies:** 2\
**Last updated:** [30 September 2021 00:35 UTC](https://discourse.nodered.org/t/using-variables-in-an-array/51692 "2021-09-30T00:35:36Z")

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In my function-Node I have to construct the following msg.payload. I am able to use a variable for the id as well for the value of "Fieldname" but I can't figure out how or if I am able to use a variable to describe the …

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## [Uibulder version V2.03](https://discourse.nodered.org/t/uibulder-version-v2-03/51685)

<div class="topic-metadata">

**Author:** [@magicman](https://discourse.nodered.org/u/magicman)\
**Replies:** 5\
**Last updated:** [29 September 2021 22:53 UTC](https://discourse.nodered.org/t/uibulder-version-v2-03/51685 "2021-09-29T22:53:55Z")

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i am trying to find where i put variables in index .js in previous versions it was put in: const app = new vue({ el: '#app, data() {return : usertemp: 0 , }}, // --- end of data --- // but unable to find this sec…

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## [Just First message delay only](https://discourse.nodered.org/t/just-first-message-delay-only/51677)

<div class="topic-metadata">

**Author:** [@sefaguntepe](https://discourse.nodered.org/u/sefaguntepe)\
**Replies:** 5\
**Last updated:** [29 September 2021 20:12 UTC](https://discourse.nodered.org/t/just-first-message-delay-only/51677 "2021-09-29T20:12:24Z")

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Hi, I just want to delay the first message for a certain amount of time. How can I do it? Subsequent messages should arrive without delay. Thanks for your help.

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## [Issue with Persistent Context when using q-gate](https://discourse.nodered.org/t/issue-with-persistent-context-when-using-q-gate/50886)

<div class="topic-metadata">

**Author:** [@pranavthakkar](https://discourse.nodered.org/u/pranavthakkar)\
**Replies:** 19\
**Last updated:** [29 September 2021 19:17 UTC](https://discourse.nodered.org/t/issue-with-persistent-context-when-using-q-gate/50886 "2021-09-29T19:17:59Z")

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Hi @zenofmud. I'm little confused over cache. If I set it to false. wouldn't it should store my values instantaneously? Case: 1 but here is my error on this code. and it is not storing. \[{"id":"2ad176d6.2631aa","type"…

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## [Convert string of values to key/value object](https://discourse.nodered.org/t/convert-string-of-values-to-key-value-object/51676)

<div class="topic-metadata">

**Author:** [@ChristophCaina](https://discourse.nodered.org/u/ChristophCaina)\
**Replies:** 3\
**Last updated:** [29 September 2021 17:09 UTC](https://discourse.nodered.org/t/convert-string-of-values-to-key-value-object/51676 "2021-09-29T17:09:29Z")

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Hi, I am reading the SMART values from a Harddrive and getting the following payload back: { "health":"PASSED", "type":"text", "wearout":90, "text":"\\n SMART/Health Information (NVMe Log 0x02) \\n Criti…

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## [Memory area in the node-red](https://discourse.nodered.org/t/memory-area-in-the-node-red/51675)

<div class="topic-metadata">

**Author:** [@jlqautomacao](https://discourse.nodered.org/u/jlqautomacao)\
**Replies:** 3\
**Last updated:** [29 September 2021 15:28 UTC](https://discourse.nodered.org/t/memory-area-in-the-node-red/51675 "2021-09-29T15:28:32Z")

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Hi, I'm trying to create a memory area on node-red but I'm not succeeding. this would be to store read information of the modules being read by node-red. is there a pallet for this application? This would be the mod…

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## [Flow Enable/Disable Via Dashboard Control](https://discourse.nodered.org/t/flow-enable-disable-via-dashboard-control/51670)

<div class="topic-metadata">

**Author:** [@eddee54455](https://discourse.nodered.org/u/eddee54455)\
**Replies:** 5\
**Last updated:** [29 September 2021 15:19 UTC](https://discourse.nodered.org/t/flow-enable-disable-via-dashboard-control/51670 "2021-09-29T15:19:46Z")

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Good day O' Learned Ones!! I have a situation where I need to switch a mode of control and data sampling between 2 methods under "emergency" situations.... I have 2 flows - Currently I enable one, disable the other, th…

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## [Node-RED watch node, files edited / created at the same time](https://discourse.nodered.org/t/node-red-watch-node-files-edited-created-at-the-same-time/51666)

<div class="topic-metadata">

**Author:** [@hbedev](https://discourse.nodered.org/u/hbedev)\
**Replies:** 4\
**Last updated:** [29 September 2021 14:45 UTC](https://discourse.nodered.org/t/node-red-watch-node-files-edited-created-at-the-same-time/51666 "2021-09-29T14:45:43Z")

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Hi, i'm using the watch node provided by Node-RED. Does this node support multiple events at the same time? I need to "watch" a folder where 2 files are always updated at the same time. But i am always notified of t…

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## [Error while installing node-red-contrib-modbus](https://discourse.nodered.org/t/error-while-installing-node-red-contrib-modbus/51660)

<div class="topic-metadata">

**Author:** [@KevJ](https://discourse.nodered.org/u/KevJ)\
**Replies:** 7\
**Last updated:** [29 September 2021 13:07 UTC](https://discourse.nodered.org/t/error-while-installing-node-red-contrib-modbus/51660 "2021-09-29T13:07:23Z")

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Hi, it´s my first post here. I got the Node-RED version: v10.15.3 and the Node.js version: v0.20l.7. I tried to install the node-red-contrib-modbus node, but i got a bunch of erorrs after starting the installation in no…

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## [Read data to buffer and write it to mysql](https://discourse.nodered.org/t/read-data-to-buffer-and-write-it-to-mysql/51667)

<div class="topic-metadata">

**Author:** [@ELParreira](https://discourse.nodered.org/u/ELParreira)\
**Replies:** 2\
**Last updated:** [29 September 2021 12:52 UTC](https://discourse.nodered.org/t/read-data-to-buffer-and-write-it-to-mysql/51667 "2021-09-29T12:52:21Z")

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Hello, I'm new to node red and I want to develop a project that consists os reading data from modbus devices (already done), and buffer the data (to csv file or buffer), after I want to save the same data do mysql(also …

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## [Stop Node-Red randomly](https://discourse.nodered.org/t/stop-node-red-randomly/51656)

<div class="topic-metadata">

**Author:** [@SoftwareIndustrial](https://discourse.nodered.org/u/SoftwareIndustrial)\
**Replies:** 4\
**Last updated:** [29 September 2021 12:28 UTC](https://discourse.nodered.org/t/stop-node-red-randomly/51656 "2021-09-29T12:28:34Z")

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Hi, I have a NodeRed installation: Node-RED version: V1.3.5 Node.js: V16.9.1 running on: Microsoft Windows Server 2012 (64-bit) autostarted from Task Scheduler and suddenly it stops without any cause. The log says: …

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## [Netbeast router URL is missing or device cannot be found](https://discourse.nodered.org/t/netbeast-router-url-is-missing-or-device-cannot-be-found/412)

<div class="topic-metadata">

**Author:** [@variyaSandip](https://discourse.nodered.org/u/variyaSandip)\
**Replies:** 11\
**Last updated:** [29 September 2021 11:22 UTC](https://discourse.nodered.org/t/netbeast-router-url-is-missing-or-device-cannot-be-found/412 "2021-09-29T11:22:53Z")

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Hi, I cannot make it work, once I install npm install -g --unsafe-perm node-red then Install npm install node-red-dashboard and then install node-red I uploaded bellow screenShot \[node-red\] Any hint please? thanks

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## [Mqtt-Nodered-Pgadmin](https://discourse.nodered.org/t/mqtt-nodered-pgadmin/51648)

<div class="topic-metadata">

**Author:** [@vishnupriya](https://discourse.nodered.org/u/vishnupriya)\
**Replies:** 3\
**Last updated:** [29 September 2021 10:33 UTC](https://discourse.nodered.org/t/mqtt-nodered-pgadmin/51648 "2021-09-29T10:33:41Z")

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Hi, I'm new to Node-red and I'm in urgent need for a help. I'm trying to insert dynamic data coming from mqtt sensor in to a table in my pgadmin. But I'm facing some issues with inserting data, because its showing ("In…

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## [Simple way to check a file size ? (watch file?)](https://discourse.nodered.org/t/simple-way-to-check-a-file-size-watch-file/51631)

<div class="topic-metadata">

**Author:** [@waquete](https://discourse.nodered.org/u/waquete)\
**Replies:** 5\
**Last updated:** [29 September 2021 10:01 UTC](https://discourse.nodered.org/t/simple-way-to-check-a-file-size-watch-file/51631 "2021-09-29T10:01:46Z")

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Hi ! I download a snap shot of a camera that sometime does not succeed This can be easily checked from filesize (ie: filesize very small = wrong file) and I wanted to use this to filter wrong files for further processi…

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