# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=540

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

**Page:** 541

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## [Https webservice communication (SAP) with Kerberos x.509 certificate](https://discourse.nodered.org/t/https-webservice-communication-sap-with-kerberos-x-509-certificate/46970)

<div class="topic-metadata">

**Author:** [@riesenbaer](https://discourse.nodered.org/u/riesenbaer)\
**Replies:** 0\
**Last updated:** [10 June 2021 09:33 UTC](https://discourse.nodered.org/t/https-webservice-communication-sap-with-kerberos-x-509-certificate/46970 "2021-06-10T09:33:56Z")

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Hello, we communicate with a SAP system via https-node providing an XML file to the node, basic authentication with user and password and getting the result. everything works very good and stable. BUT now our securi…

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## [Simple music / playlist playback](https://discourse.nodered.org/t/simple-music-playlist-playback/46952)

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**Author:** [@bnew](https://discourse.nodered.org/u/bnew)\
**Replies:** 3\
**Last updated:** [10 June 2021 08:05 UTC](https://discourse.nodered.org/t/simple-music-playlist-playback/46952 "2021-06-10T08:05:51Z")

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Hi - pretty new to node-red and I could use some advice on how to handle a particular feature implementation for my project. I would like to have a playlist of music (stored as mp3s or wavs in a single directory) be cont…

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## [Two MQTT IN to SQLITE](https://discourse.nodered.org/t/two-mqtt-in-to-sqlite/46880)

<div class="topic-metadata">

**Author:** [@jjcfrank](https://discourse.nodered.org/u/jjcfrank)\
**Replies:** 23\
**Last updated:** [10 June 2021 05:48 UTC](https://discourse.nodered.org/t/two-mqtt-in-to-sqlite/46880 "2021-06-10T05:48:19Z")

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Hello, I have never used Node-Red before so I am still trying to figure it out. I have two MQTT IN, one is temperature and the other one is humidity. I want to separately have them in the sqlite database. The idea is t…

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## [MQTT mosquitto connection problem](https://discourse.nodered.org/t/mqtt-mosquitto-connection-problem/46941)

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**Author:** [@flayy](https://discourse.nodered.org/u/flayy)\
**Replies:** 12\
**Last updated:** [10 June 2021 02:10 UTC](https://discourse.nodered.org/t/mqtt-mosquitto-connection-problem/46941 "2021-06-10T02:10:54Z")

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NR 1.3.5 Node.js v12.21.0 Ubuntu 21.04 trying to connect mqtt in and mqtt out nodes MQTT broker is running correctly (tested by MQTT Explorer : localhost:1883) credentials are typed in properly yellow dot on both node…

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## [Ultrasonic sensor give false values](https://discourse.nodered.org/t/ultrasonic-sensor-give-false-values/46915)

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**Author:** [@Stian\_Algroy](https://discourse.nodered.org/u/Stian_Algroy)\
**Replies:** 10\
**Last updated:** [9 June 2021 21:57 UTC](https://discourse.nodered.org/t/ultrasonic-sensor-give-false-values/46915 "2021-06-09T21:57:20Z")

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Hi! I'm currently using the ultrasonic sensor for my node red project to calculate distance. Often it gives me the correct distance, but sometimes it sends a random value. This is the sensor i'm using: https://www.di…

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## [No Space left on PI](https://discourse.nodered.org/t/no-space-left-on-pi/46547)

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**Author:** [@swanside](https://discourse.nodered.org/u/swanside)\
**Replies:** 19\
**Last updated:** [9 June 2021 22:35 UTC](https://discourse.nodered.org/t/no-space-left-on-pi/46547 "2021-06-09T22:35:01Z")

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It seems that my Node Red flows which are all writing to an InFlux DB and accessed by grafana have filled up my SD card. Is there a way I could use a USB 2TB hard drive as the storage for the Influx DB? Cheers

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## [Node-red simple CSV two column lookup](https://discourse.nodered.org/t/node-red-simple-csv-two-column-lookup/46945)

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**Author:** [@Stretchuar](https://discourse.nodered.org/u/Stretchuar)\
**Replies:** 5\
**Last updated:** [9 June 2021 21:41 UTC](https://discourse.nodered.org/t/node-red-simple-csv-two-column-lookup/46945 "2021-06-09T21:41:35Z")

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Hi, I'm hoping someone can help as I've trawled through forums and posted flows and not been able to do what I want to achieve. In principle, its quite simple. I have some excel data, 2 columns worth, relating a 'part…

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## [Split Node & whitespace](https://discourse.nodered.org/t/split-node-whitespace/46930)

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**Author:** [@dokoral](https://discourse.nodered.org/u/dokoral)\
**Replies:** 3\
**Last updated:** [9 June 2021 18:59 UTC](https://discourse.nodered.org/t/split-node-whitespace/46930 "2021-06-09T18:59:18Z")

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I am trying to use white spaces (space between words in text string) has a delimiter. I tried the " \\s " js Metacharacter but it doesn't work. Any help will be appreciated. Dan (NR v1.3.5, Nodejs v12.22)

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## [How do I inject a service to a call service node?](https://discourse.nodered.org/t/how-do-i-inject-a-service-to-a-call-service-node/46814)

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**Author:** [@SteveMann](https://discourse.nodered.org/u/SteveMann)\
**Replies:** 5\
**Last updated:** [9 June 2021 18:42 UTC](https://discourse.nodered.org/t/how-do-i-inject-a-service-to-a-call-service-node/46814 "2021-06-09T18:42:21Z")

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How do I inject a service to a call service node? I tried setting msg.service in the inject node to {{turn\_on}}, but that isn't working. This is part of an experiment to clean up one of my flows. I am turning selecte…

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## [Create a subflow that takes entity ids as parameters](https://discourse.nodered.org/t/create-a-subflow-that-takes-entity-ids-as-parameters/46937)

<div class="topic-metadata">

**Author:** [@eamonn.sullivan](https://discourse.nodered.org/u/eamonn.sullivan)\
**Replies:** 2\
**Last updated:** [9 June 2021 18:23 UTC](https://discourse.nodered.org/t/create-a-subflow-that-takes-entity-ids-as-parameters/46937 "2021-06-09T18:23:44Z")

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This is likely a very dumb, newby question, but my google foo seems to be failing me and I can't find the answer. I have a series of nearly identical flows connected to different motion sensors. One half of the flows tu…

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## [Modify the Node-Id in the node OPCUA Browser from a text input](https://discourse.nodered.org/t/modify-the-node-id-in-the-node-opcua-browser-from-a-text-input/46932)

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**Author:** [@khadija](https://discourse.nodered.org/u/khadija)\
**Replies:** 0\
**Last updated:** [9 June 2021 17:21 UTC](https://discourse.nodered.org/t/modify-the-node-id-in-the-node-opcua-browser-from-a-text-input/46932 "2021-06-09T17:21:58Z")

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Hello everyone, I am a beginner in node red, I work now with IIoT-OPCUA, I need to connect my server to my client OPC UA through an interface in node red Dashboard and then access all the data in the server. I want to …

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## [Changing Node-red editor](https://discourse.nodered.org/t/changing-node-red-editor/46899)

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**Author:** [@Shaor99](https://discourse.nodered.org/u/Shaor99)\
**Replies:** 2\
**Last updated:** [9 June 2021 17:04 UTC](https://discourse.nodered.org/t/changing-node-red-editor/46899 "2021-06-09T17:04:52Z")

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Hi All, I'm working on a new project around no-code and it looks like node-red is just perfect for me however, I'm looking to change a few elements on the editor and make it more user-friendly (for non-programmers). Is …

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## [Modbus and OPCUA nodes](https://discourse.nodered.org/t/modbus-and-opcua-nodes/46923)

<div class="topic-metadata">

**Author:** [@AskNodeRed](https://discourse.nodered.org/u/AskNodeRed)\
**Replies:** 0\
**Last updated:** [9 June 2021 16:01 UTC](https://discourse.nodered.org/t/modbus-and-opcua-nodes/46923 "2021-06-09T16:01:49Z")

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Hello, Could someone tell me please, what are the different possible connection status of MODBUS and OPCUA nodes (active, connecting, offline....?) Thank you in advance

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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)

<div class="topic-metadata">

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

<div class="topic-metadata">

**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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## [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)

<div class="topic-metadata">

**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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## [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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## [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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## [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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## [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)

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**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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