# Latest

**URL:** https://discourse.nodered.org/latest.md?page=797

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

**Page:** 798

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## [Compare two values to generate a difference value](https://discourse.nodered.org/t/compare-two-values-to-generate-a-difference-value/46890)

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**Author:** [@dougle03](https://discourse.nodered.org/u/dougle03)\
**Replies:** 13\
**Last updated:** [9 June 2021 14:16 UTC](https://discourse.nodered.org/t/compare-two-values-to-generate-a-difference-value/46890 "2021-06-09T14:16:22Z")

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Hi, I've two incoming temp sensor values, let's call them hi and lo, they come from different devices so don't arrive at the same time. How can I subtract the 'lo' value from the 'hi' value to create a new value called…

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## [Custom icons cannot be used in appearance section](https://discourse.nodered.org/t/custom-icons-cannot-be-used-in-appearance-section/46905)

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**Author:** [@antoine-em](https://discourse.nodered.org/u/antoine-em)\
**Replies:** 4\
**Last updated:** [9 June 2021 12:48 UTC](https://discourse.nodered.org/t/custom-icons-cannot-be-used-in-appearance-section/46905 "2021-06-09T12:48:38Z")

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Environment Node-RED version: v1.3.5-git Node.js version: v16.2.0 Darwin 20.5.0 x64 LE I am developing a custom node and have added in the icons folder of the node some svg resources. They are well discovered and f…

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## [Postgrestor node does not give any output msg](https://discourse.nodered.org/t/postgrestor-node-does-not-give-any-output-msg/46840)

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**Author:** [@esalles](https://discourse.nodered.org/u/esalles)\
**Replies:** 9\
**Last updated:** [9 June 2021 12:14 UTC](https://discourse.nodered.org/t/postgrestor-node-does-not-give-any-output-msg/46840 "2021-06-09T12:14:00Z")

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Guys, I'm facing a strange issue on a new Node-Red setup. It used to use postgrestor many times on many setup, but on that new one, postgrestor node does not give any output msg. What I've already checked: Downgrade…

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## [Is is possible to have maps in the /ui page](https://discourse.nodered.org/t/is-is-possible-to-have-maps-in-the-ui-page/46901)

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**Author:** [@ffazul64](https://discourse.nodered.org/u/ffazul64)\
**Replies:** 2\
**Last updated:** [9 June 2021 11:31 UTC](https://discourse.nodered.org/t/is-is-possible-to-have-maps-in-the-ui-page/46901 "2021-06-09T11:31:24Z")

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Newbie to node red. I'm creating a quarantine surveillance prototype using LoRa. I have hooked up a receiver to enter data to the application via serial port. I want to show gps data and a geo fence within a tab i creat…

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## [Manage palette upgrade notifications](https://discourse.nodered.org/t/manage-palette-upgrade-notifications/46910)

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**Author:** [@jovanotti25](https://discourse.nodered.org/u/jovanotti25)\
**Replies:** 1\
**Last updated:** [9 June 2021 11:13 UTC](https://discourse.nodered.org/t/manage-palette-upgrade-notifications/46910 "2021-06-09T11:13:12Z")

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Hi, i wanna some help, its possible to create notifications when some nodes have updates in manage palette? thanks a lot

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## [AMQP working on node-red](https://discourse.nodered.org/t/amqp-working-on-node-red/46893)

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**Author:** [@anam.amjad102](https://discourse.nodered.org/u/anam.amjad102)\
**Replies:** 3\
**Last updated:** [9 June 2021 11:09 UTC](https://discourse.nodered.org/t/amqp-working-on-node-red/46893 "2021-06-09T11:09:16Z")

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HI, I am working on AMQP using NODE-RED. I am unable to find RabbitMQ in the palette. I installed RabbitMQ on raspberry pi device separately however, i am unable to link it using localhost:5672. Can someone please guid…

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## [.config.json and node-red-flow-contrib-manager issues](https://discourse.nodered.org/t/config-json-and-node-red-flow-contrib-manager-issues/46906)

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**Author:** [@Mathi](https://discourse.nodered.org/u/Mathi)\
**Replies:** 0\
**Last updated:** [9 June 2021 10:50 UTC](https://discourse.nodered.org/t/config-json-and-node-red-flow-contrib-manager-issues/46906 "2021-06-09T10:50:36Z")

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Hi, I have installed node-red-contrib-flow-manager and am using node-red version 1.3.4 it throws error saying .config.json is missing , i have checked their gitlab repository there is an issue already created for the sa…

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## [CTRL Scroll Zoom within the UI](https://discourse.nodered.org/t/ctrl-scroll-zoom-within-the-ui/46889)

<div class="topic-metadata">

**Author:** [@dougle03](https://discourse.nodered.org/u/dougle03)\
**Replies:** 5\
**Last updated:** [9 June 2021 10:13 UTC](https://discourse.nodered.org/t/ctrl-scroll-zoom-within-the-ui/46889 "2021-06-09T10:13:23Z")

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Morning Devs. Any chance there is an item on the roadmap to change the way the UI Zooms in and out? When I hit CTRL and scroll the mouse wheel the entire application zooms in and out (This also affects other sites host…

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## [Export / import flows](https://discourse.nodered.org/t/export-import-flows/46870)

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**Author:** [@Jacad](https://discourse.nodered.org/u/Jacad)\
**Replies:** 13\
**Last updated:** [9 June 2021 09:47 UTC](https://discourse.nodered.org/t/export-import-flows/46870 "2021-06-09T09:47:00Z")

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In Node Red v0... I saved a copy of my flow with the export function. After a problem with my Raspberry Pi I installed a new version of NR. In NR v1.3.4. I can't get the saved flow back, dozens of errors. I there a co…

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## [Angular v1 end of life impacts?](https://discourse.nodered.org/t/angular-v1-end-of-life-impacts/46813)

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**Author:** [@r0ller](https://discourse.nodered.org/u/r0ller)\
**Replies:** 11\
**Last updated:** [9 June 2021 09:22 UTC](https://discourse.nodered.org/t/angular-v1-end-of-life-impacts/46813 "2021-06-09T09:22:09Z")

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Hi All, I would like to create some ui nodes on my own but first I'd like to ask if there are any plans to move away from angular v1 or altogether from angular? AFAIK, angular v1 is what the dashboard is based on and if…

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## [Switch Node - Wrong Output Problem](https://discourse.nodered.org/t/switch-node-wrong-output-problem/46859)

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**Author:** [@ChrisTs99](https://discourse.nodered.org/u/ChrisTs99)\
**Replies:** 1\
**Last updated:** [9 June 2021 09:09 UTC](https://discourse.nodered.org/t/switch-node-wrong-output-problem/46859 "2021-06-09T09:09:14Z")

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Hello, I am facing a problem with a switch node, which takes wrong input and outputs something wrong as well. The problem is caused by the trigger because when it gets activated for the first time it then doesn't reset …

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## [Self\_signed\_cert\_in\_chain error](https://discourse.nodered.org/t/self-signed-cert-in-chain-error/46864)

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**Author:** [@mhechthz](https://discourse.nodered.org/u/mhechthz)\
**Replies:** 2\
**Last updated:** [9 June 2021 07:09 UTC](https://discourse.nodered.org/t/self-signed-cert-in-chain-error/46864 "2021-06-09T07:09:53Z")

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Hi, I execute a HTTP-GET on a self hosted web page. With http request node I get the error message self\_signed\_cert\_in\_chain. I don't know how to solve this because alle answers in web are about nodejs but not node-red…

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## [From Influx IN node to CSV-file problem](https://discourse.nodered.org/t/from-influx-in-node-to-csv-file-problem/46855)

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**Author:** [@HaVi](https://discourse.nodered.org/u/HaVi)\
**Replies:** 8\
**Last updated:** [9 June 2021 07:00 UTC](https://discourse.nodered.org/t/from-influx-in-node-to-csv-file-problem/46855 "2021-06-09T07:00:40Z")

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In a simple flow, data is read from an Influx Database with, in addition to the timestamp, only one field namely "luchtdruk". The data is converted to a CSV file but in that file there are extra quotes (image). Can some…

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## [How to restrict dates to only greater than the one selected](https://discourse.nodered.org/t/how-to-restrict-dates-to-only-greater-than-the-one-selected/46882)

<div class="topic-metadata">

**Author:** [@JMJM](https://discourse.nodered.org/u/JMJM)\
**Replies:** 3\
**Last updated:** [9 June 2021 01:47 UTC](https://discourse.nodered.org/t/how-to-restrict-dates-to-only-greater-than-the-one-selected/46882 "2021-06-09T01:47:55Z")

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How can i make a pair of datepickers, where the first one i select makes it so the other one cant pick a date earlier than the one that is already picked? Edit: preferably in a Form node, hotNipis solution works for ind…

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## [Security vulnerabilities in child dependencies](https://discourse.nodered.org/t/security-vulnerabilities-in-child-dependencies/46876)

<div class="topic-metadata">

**Author:** [@jmholzinger](https://discourse.nodered.org/u/jmholzinger)\
**Replies:** 5\
**Last updated:** [8 June 2021 22:46 UTC](https://discourse.nodered.org/t/security-vulnerabilities-in-child-dependencies/46876 "2021-06-08T22:46:50Z")

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How can I report and track vulnerabilities related to dependencies of the Node-RED project? My organization uses OWASP Dependency-Check to scan our projects for vulnerabilities. This is flagging the css-what dependency, …

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## [Worldmap - Navigation lines from openrouteservice - delete and color](https://discourse.nodered.org/t/worldmap-navigation-lines-from-openrouteservice-delete-and-color/46740)

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**Author:** [@ScheepersJohan](https://discourse.nodered.org/u/ScheepersJohan)\
**Replies:** 1\
**Last updated:** [8 June 2021 22:14 UTC](https://discourse.nodered.org/t/worldmap-navigation-lines-from-openrouteservice-delete-and-color/46740 "2021-06-08T22:14:47Z")

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I want to delete and change color of lines on the Worldmap. For the color I tried the msg.color:"#4B0082" it stay red, is this the wrong property? For the deletion of the line I tried msd.delete:"", msd.delete:"true", …

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## [Default config node](https://discourse.nodered.org/t/default-config-node/46773)

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**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 10\
**Last updated:** [8 June 2021 21:47 UTC](https://discourse.nodered.org/t/default-config-node/46773 "2021-06-08T21:47:44Z")

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Hi folks, When you create a config node for the node-red-node-dropbox node, then that config node is automatically selected (in the config dropdown) when a new dropbox node is added to the flow. I would like to achieve…

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## [Fancy buttons updating](https://discourse.nodered.org/t/fancy-buttons-updating/46557)

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**Author:** [@HobbyFarmer](https://discourse.nodered.org/u/HobbyFarmer)\
**Replies:** 14\
**Last updated:** [8 June 2021 20:58 UTC](https://discourse.nodered.org/t/fancy-buttons-updating/46557 "2021-06-08T20:58:43Z")

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Hi I am working with @scargill 's wonderful "fancy buttons" I have run into some problems. I am trying to make a two state button. When I click on the buttons on the computer the status is not updated on my phone or t…

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## [DoS Vulnerability open-source MQTT brokers](https://discourse.nodered.org/t/dos-vulnerability-open-source-mqtt-brokers/46872)

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**Author:** [@smithy](https://discourse.nodered.org/u/smithy)\
**Replies:** 0\
**Last updated:** [8 June 2021 20:27 UTC](https://discourse.nodered.org/t/dos-vulnerability-open-source-mqtt-brokers/46872 "2021-06-08T20:27:09Z")

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I thought it might be useful for MQTT users to know that The Register posted a story today that RabbitMQ, EMQ X and VerneMQ are all vulnerable. CVE-2021-22116, CVE-2021-33175, and CVE-2021-33176.

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## [Multiple "If clauses" in function node](https://discourse.nodered.org/t/multiple-if-clauses-in-function-node/46788)

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**Author:** [@RonMa](https://discourse.nodered.org/u/RonMa)\
**Replies:** 8\
**Last updated:** [8 June 2021 19:39 UTC](https://discourse.nodered.org/t/multiple-if-clauses-in-function-node/46788 "2021-06-08T19:39:21Z")

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Hi guys, I just started my very few steps using functional nodes as I´m not a programmer so please bear with me if this request is rather simple, stupid. Here is the use case I´m trying to accomplish: When entering my …

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## [Node property resets itself](https://discourse.nodered.org/t/node-property-resets-itself/46866)

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**Author:** [@hkayan](https://discourse.nodered.org/u/hkayan)\
**Replies:** 2\
**Last updated:** [8 June 2021 17:02 UTC](https://discourse.nodered.org/t/node-property-resets-itself/46866 "2021-06-08T17:02:49Z")

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Hi, My custom node property resets itself after re-opening it to reconfigure. I am editing it as it is seen in the below image. But if I re-open it after deploying, the Search for property resets itself to All as se…

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## [Countdown Between Payloads](https://discourse.nodered.org/t/countdown-between-payloads/46815)

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**Author:** [@aa0z](https://discourse.nodered.org/u/aa0z)\
**Replies:** 6\
**Last updated:** [8 June 2021 16:04 UTC](https://discourse.nodered.org/t/countdown-between-payloads/46815 "2021-06-08T16:04:20Z")

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I'm searching for a countdown timer that when it receives a payload, it starts at 0 and displays the negative time since the last payload is sent. The timer will reset to 0 when the next payload is sent and starts the t…

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## [Parametric file read, given a message.payload.filename](https://discourse.nodered.org/t/parametric-file-read-given-a-message-payload-filename/46861)

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**Author:** [@0x180](https://discourse.nodered.org/u/0x180)\
**Replies:** 1\
**Last updated:** [8 June 2021 15:28 UTC](https://discourse.nodered.org/t/parametric-file-read-given-a-message-payload-filename/46861 "2021-06-08T15:28:08Z")

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I am trying to expose a little rest api interface to download files from a given folder. So the first API return a file list and the second should let the client, download the desired file. I have not understand yet ho…

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## [Node-red & Grafana interaction](https://discourse.nodered.org/t/node-red-grafana-interaction/46723)

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**Author:** [@Lupin\_III](https://discourse.nodered.org/u/Lupin_III)\
**Replies:** 32\
**Last updated:** [8 June 2021 14:42 UTC](https://discourse.nodered.org/t/node-red-grafana-interaction/46723 "2021-06-08T14:42:43Z")

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Hi to all. In this forum several times has been touched the aspect that node-red is single user and not multi-tenant, sharing and suggesting several approach in order to reach the wanted goals. In a more structured way …

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## [MySql select filter](https://discourse.nodered.org/t/mysql-select-filter/46858)

<div class="topic-metadata">

**Author:** [@simone\_alfa](https://discourse.nodered.org/u/simone_alfa)\
**Replies:** 2\
**Last updated:** [8 June 2021 14:05 UTC](https://discourse.nodered.org/t/mysql-select-filter/46858 "2021-06-08T14:05:51Z")

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Hi, I'm new of Node-Red. I want to filter a data table of mysql database with 2 date picker, but I don't success to read the previous variables of function. Someone can help me? Thank you

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## [Customize Flow editor UI](https://discourse.nodered.org/t/customize-flow-editor-ui/46860)

<div class="topic-metadata">

**Author:** [@0x180](https://discourse.nodered.org/u/0x180)\
**Replies:** 2\
**Last updated:** [8 June 2021 13:50 UTC](https://discourse.nodered.org/t/customize-flow-editor-ui/46860 "2021-06-08T13:50:43Z")

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I wonder if possibile customize flow editor UI placing company logo and name in the top left corner. Thanks in advance for clarification

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## [Manage Pallette error - failed to load node catalogue](https://discourse.nodered.org/t/manage-pallette-error-failed-to-load-node-catalogue/46853)

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**Author:** [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Replies:** 1\
**Last updated:** [8 June 2021 10:56 UTC](https://discourse.nodered.org/t/manage-pallette-error-failed-to-load-node-catalogue/46853 "2021-06-08T10:56:49Z")

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Just tried to use the Manage Pallette and this pops up: and this is in the Javascript Console

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## [Telegram - Flow spams a lot of messages](https://discourse.nodered.org/t/telegram-flow-spams-a-lot-of-messages/46849)

<div class="topic-metadata">

**Author:** [@ChrisTs99](https://discourse.nodered.org/u/ChrisTs99)\
**Replies:** 2\
**Last updated:** [8 June 2021 09:20 UTC](https://discourse.nodered.org/t/telegram-flow-spams-a-lot-of-messages/46849 "2021-06-08T09:20:38Z")

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Hello, I will explain my problem in this flow in order not to get involved with all the nodes. So trigger node is sending every one second "the existing msg object". Function "Fire" has a value which I want to be decrea…

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## [DE Anwesenheits Log / Zeit Tracking](https://discourse.nodered.org/t/de-anwesenheits-log-zeit-tracking/46848)

<div class="topic-metadata">

**Author:** [@Floslist](https://discourse.nodered.org/u/Floslist)\
**Replies:** 1\
**Last updated:** [8 June 2021 09:14 UTC](https://discourse.nodered.org/t/de-anwesenheits-log-zeit-tracking/46848 "2021-06-08T09:14:30Z")

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Hey, ich bin Recht Frisch mit Node Red ich würde gerne wie im titel beschrieben einen anwesnheits log / Zeit Tracken node erstellen, wo ich eine Tabelle rausbekomme wann bin ich gekommen, wann bin ich gegangen und wie v…

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## [How to use subflows that contain UI elements](https://discourse.nodered.org/t/how-to-use-subflows-that-contain-ui-elements/46845)

<div class="topic-metadata">

**Author:** [@Mr\_M\_from\_K](https://discourse.nodered.org/u/Mr_M_from_K)\
**Replies:** 3\
**Last updated:** [8 June 2021 09:06 UTC](https://discourse.nodered.org/t/how-to-use-subflows-that-contain-ui-elements/46845 "2021-06-08T09:06:06Z")

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Hello, I created a small UI element with SVG graphics node and made a subflow with some other nodes out of it. I can easily place that on my dashboard wherever I want it. But when I add a second instance of that subflow…

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