# Latest

**URL:** https://discourse.nodered.org/latest.md?page=899

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

**Page:** 900

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## [Best Way to Package Data to Send](https://discourse.nodered.org/t/best-way-to-package-data-to-send/39954)

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**Author:** [@psalibe](https://discourse.nodered.org/u/psalibe)\
**Replies:** 0\
**Last updated:** [28 January 2021 20:04 UTC](https://discourse.nodered.org/t/best-way-to-package-data-to-send/39954 "2021-01-28T20:04:39Z")

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Hi All, I am sending data from a Siemens PLC to an OPCUA database which then through Node-Red sends to a Ubidots dashboard. In the PLC we have several events set up for "feeding" our machines. Our machines are digesters…

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## [\[UPDATE\] node-red-contrib-multiple-queue (version 0.2.1)](https://discourse.nodered.org/t/update-node-red-contrib-multiple-queue-version-0-2-1/39948)

<div class="topic-metadata">

**Author:** [@drmibell](https://discourse.nodered.org/u/drmibell)\
**Replies:** 0\
**Last updated:** [28 January 2021 19:03 UTC](https://discourse.nodered.org/t/update-node-red-contrib-multiple-queue-version-0-2-1/39948 "2021-01-28T19:03:55Z")

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This node provides multiple, independently controlled message queues. The update fixes several bugs that disabled minor but useful features of the node. It is recommended that all users upgrade. This revision led to an …

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## [Set and use Global OBJECT variable](https://discourse.nodered.org/t/set-and-use-global-object-variable/39944)

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**Author:** [@gcronin66](https://discourse.nodered.org/u/gcronin66)\
**Replies:** 2\
**Last updated:** [28 January 2021 18:04 UTC](https://discourse.nodered.org/t/set-and-use-global-object-variable/39944 "2021-01-28T18:04:34Z")

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I'm working on a Web Audio project using an AudioContext() object. I would like to set this object as a global variable so I can create at start and use it within multiple flows. I have a start-up node running this to …

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## [Strange issue or bug opening a Sub-Flow](https://discourse.nodered.org/t/strange-issue-or-bug-opening-a-sub-flow/39866)

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**Author:** [@crackytsi](https://discourse.nodered.org/u/crackytsi)\
**Replies:** 8\
**Last updated:** [28 January 2021 16:47 UTC](https://discourse.nodered.org/t/strange-issue-or-bug-opening-a-sub-flow/39866 "2021-01-28T16:47:31Z")

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If within the flow, a sub-flow node exists, I have sometimes a strange situtation: Usually, when I double-click on the sub-flow, a dialog and I can change properties or edit the subflow. But sometimes it does not react…

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## [Alexa Home Skill Geographical Restrictions](https://discourse.nodered.org/t/alexa-home-skill-geographical-restrictions/39937)

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**Author:** [@FilipeCarvalhedo](https://discourse.nodered.org/u/FilipeCarvalhedo)\
**Replies:** 0\
**Last updated:** [28 January 2021 15:57 UTC](https://discourse.nodered.org/t/alexa-home-skill-geographical-restrictions/39937 "2021-01-28T15:57:12Z")

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Hello, I've been using node-red for a while and now I read about how to integrate alexa. I'm trying "node-red-contrib-alexa-home-skill" but it depends on alexa having the node-red skill. In my application alexa this skil…

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## [Rpi-gpio not available on docker container](https://discourse.nodered.org/t/rpi-gpio-not-available-on-docker-container/39934)

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**Author:** [@nonomu1](https://discourse.nodered.org/u/nonomu1)\
**Replies:** 0\
**Last updated:** [28 January 2021 15:22 UTC](https://discourse.nodered.org/t/rpi-gpio-not-available-on-docker-container/39934 "2021-01-28T15:22:59Z")

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Hi there, In my company we are trying to work with node-red-node-pi-gpio package (not the gpiod). When I install it locally on my linux VM it works great. The trouble is when deploying as a container. I tried few gui…

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## [Send only one message to a MQTT topic](https://discourse.nodered.org/t/send-only-one-message-to-a-mqtt-topic/39929)

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**Author:** [@gschmidt](https://discourse.nodered.org/u/gschmidt)\
**Replies:** 2\
**Last updated:** [28 January 2021 14:57 UTC](https://discourse.nodered.org/t/send-only-one-message-to-a-mqtt-topic/39929 "2021-01-28T14:57:51Z")

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Hi, I have a flow for a Settopbox which gets the status of the box in a JSON string. This is Injected every second (at the moment I have turned repeat off). The goal is to SYNC the remotes ON/OFF button (which is a T…

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## [Balboa Whirlpool](https://discourse.nodered.org/t/balboa-whirlpool/39930)

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**Author:** [@nuiler](https://discourse.nodered.org/u/nuiler)\
**Replies:** 0\
**Last updated:** [28 January 2021 14:30 UTC](https://discourse.nodered.org/t/balboa-whirlpool/39930 "2021-01-28T14:30:43Z")

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I found an interesting node. Unfortunately it doesn't work when I want to issue a command. It comes on the debug node TypeError: Cannot read property 'crc' of undefined Somehow it is due to the function node "turn o…

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## [Custom URL for Dashboard](https://discourse.nodered.org/t/custom-url-for-dashboard/39898)

<div class="topic-metadata">

**Author:** [@MaCleodWalker](https://discourse.nodered.org/u/MaCleodWalker)\
**Replies:** 1\
**Last updated:** [28 January 2021 14:23 UTC](https://discourse.nodered.org/t/custom-url-for-dashboard/39898 "2021-01-28T14:23:39Z")

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I know that the dashboard only has 1 endpoint but would it be possible to set the tabs to a url such as "serverip:1880/ui/example" ? if so how would you go about doing that?

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## [From CSV to HTML table](https://discourse.nodered.org/t/from-csv-to-html-table/39875)

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**Author:** [@Gaberiel](https://discourse.nodered.org/u/Gaberiel)\
**Replies:** 10\
**Last updated:** [28 January 2021 13:46 UTC](https://discourse.nodered.org/t/from-csv-to-html-table/39875 "2021-01-28T13:46:21Z")

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Hello everyone; I need to know how to convert csv to html table but csv content is dynamic.. any help would be appreciated

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## [Error / rollbackFailedOptional: verb npm-session](https://discourse.nodered.org/t/error-rollbackfailedoptional-verb-npm-session/39484)

<div class="topic-metadata">

**Author:** [@iotred3307](https://discourse.nodered.org/u/iotred3307)\
**Replies:** 6\
**Last updated:** [28 January 2021 13:22 UTC](https://discourse.nodered.org/t/error-rollbackfailedoptional-verb-npm-session/39484 "2021-01-28T13:22:42Z")

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Trying to install Nodered using the command \`\`\` npm install -g --unsafe-perm node-red Error is rollbackFailedOptional: verb npm session ERR! code ECONNREFUSED npm ERR! errno ECONNREFUSED npm ERR! FetchError: request …

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## [Using NodeGenNode generates a large flow](https://discourse.nodered.org/t/using-nodegennode-generates-a-large-flow/39865)

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**Author:** [@crackytsi](https://discourse.nodered.org/u/crackytsi)\
**Replies:** 4\
**Last updated:** [28 January 2021 12:09 UTC](https://discourse.nodered.org/t/using-nodegennode-generates-a-large-flow/39865 "2021-01-28T12:09:46Z")

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Hi, I generated from a swagger file a Node using NodeGen. When I use that flow, it contains a very large set, one for each rest-api calls and some related value. Is there any chance to shrink that data? I tried to rem…

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## [How to send image from camera api takephoto(raspberry pi) node to another node](https://discourse.nodered.org/t/how-to-send-image-from-camera-api-takephoto-raspberry-pi-node-to-another-node/39906)

<div class="topic-metadata">

**Author:** [@seahyihern](https://discourse.nodered.org/u/seahyihern)\
**Replies:** 2\
**Last updated:** [28 January 2021 12:06 UTC](https://discourse.nodered.org/t/how-to-send-image-from-camera-api-takephoto-raspberry-pi-node-to-another-node/39906 "2021-01-28T12:06:17Z")

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how do i send the image from camera api to another node?

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## [Cant get a Python Script to work](https://discourse.nodered.org/t/cant-get-a-python-script-to-work/39797)

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**Author:** [@georgey11](https://discourse.nodered.org/u/georgey11)\
**Replies:** 17\
**Last updated:** [28 January 2021 11:46 UTC](https://discourse.nodered.org/t/cant-get-a-python-script-to-work/39797 "2021-01-28T11:46:46Z")

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I am designing a Facial Recognition system for college, essentially a driver needs to be recognised. I am using Node-Red as a tool to sequence the chain of events. I have a working Python script on my Pi. Using OpenCV. …

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## [Figma in UIBuilder with this github project?](https://discourse.nodered.org/t/figma-in-uibuilder-with-this-github-project/39668)

<div class="topic-metadata">

**Author:** [@j2l](https://discourse.nodered.org/u/j2l)\
**Replies:** 2\
**Last updated:** [28 January 2021 11:39 UTC](https://discourse.nodered.org/t/figma-in-uibuilder-with-this-github-project/39668 "2021-01-28T11:39:35Z")

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I stumbled on this Vue - Figma bridge: And wondered if/how it could be implemented into UIBuilder. Something like this could help, what do you think @TotallyInformation ?

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## [Car Plate Recogniser Issue](https://discourse.nodered.org/t/car-plate-recogniser-issue/39913)

<div class="topic-metadata">

**Author:** [@jacquesAYX](https://discourse.nodered.org/u/jacquesAYX)\
**Replies:** 1\
**Last updated:** [28 January 2021 10:57 UTC](https://discourse.nodered.org/t/car-plate-recogniser-issue/39913 "2021-01-28T10:57:44Z")

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After downloading the car plate recogniser node, although it is able to work, I cant seem to get the node to read multiple car plates at once. Is there any way this can be remedied? This is the flow This is the ima…

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## [Keyboard Shortcuts?](https://discourse.nodered.org/t/keyboard-shortcuts/39912)

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**Author:** [@lizzardguki](https://discourse.nodered.org/u/lizzardguki)\
**Replies:** 1\
**Last updated:** [28 January 2021 09:41 UTC](https://discourse.nodered.org/t/keyboard-shortcuts/39912 "2021-01-28T09:41:53Z")

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I have a Node-Red installed and configured on mine main PC that i am using most of the time for testing/developing flows... I have set a lot of custom keyboard shortcuts that i am used to using while developing. How co…

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## [Join http get and mqtt message](https://discourse.nodered.org/t/join-http-get-and-mqtt-message/39896)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 5\
**Last updated:** [28 January 2021 09:34 UTC](https://discourse.nodered.org/t/join-http-get-and-mqtt-message/39896 "2021-01-28T09:34:39Z")

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Hello i wish to send a telegram which holds information from a 433MHz mqtt Temperatur Sensor and and a http get information from a homepage startet with a inject 10Min interval! both part works, I use the join and it…

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## [Node-RED Dashboard: Some simple questions](https://discourse.nodered.org/t/node-red-dashboard-some-simple-questions/14538)

<div class="topic-metadata">

**Author:** [@Minz](https://discourse.nodered.org/u/Minz)\
**Replies:** 44\
**Last updated:** [28 January 2021 09:31 UTC](https://discourse.nodered.org/t/node-red-dashboard-some-simple-questions/14538 "2021-01-28T09:31:17Z")

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Dear Users, I´m very new to Node-RED, and also pretty new to programming also, so please excuse my simple questions. I wrote a script that charges or discharges batteries, the User can choose the End-Off-Charge voltage…

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## [Power BI Node\_red](https://discourse.nodered.org/t/power-bi-node-red/39874)

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**Author:** [@CallumT](https://discourse.nodered.org/u/CallumT)\
**Replies:** 6\
**Last updated:** [28 January 2021 08:50 UTC](https://discourse.nodered.org/t/power-bi-node-red/39874 "2021-01-28T08:50:17Z")

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Hi, I am having an issue installing npm install node-red-contrib-powerbi. Is anyone else having a similar issue or had this issue? Below is the photo of the issue that i am having

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## [Node Red TFJS node](https://discourse.nodered.org/t/node-red-tfjs-node/39495)

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**Author:** [@TinkyLv](https://discourse.nodered.org/u/TinkyLv)\
**Replies:** 2\
**Last updated:** [28 January 2021 07:38 UTC](https://discourse.nodered.org/t/node-red-tfjs-node/39495 "2021-01-28T07:38:50Z")

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Hey. I am trying to run a object detection flow in the node red on mu raspberry pi 4, but my tfjs object detection node gives out his error message: msg : error "TypeError: Cannot read property 'whereImpl' of undefined…

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## [Buffer to string](https://discourse.nodered.org/t/buffer-to-string/39885)

<div class="topic-metadata">

**Author:** [@KjellBrandes](https://discourse.nodered.org/u/KjellBrandes)\
**Replies:** 5\
**Last updated:** [28 January 2021 07:48 UTC](https://discourse.nodered.org/t/buffer-to-string/39885 "2021-01-28T07:48:07Z")

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Hi, I'm having a bit of a problem posting data to a REST API. I can't post the data as buffer, I have to post it as a string. This has led up to some testing..... I'm trying to open a locally stored PDF by using the "…

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## [Node-red crypto trading bot hosting](https://discourse.nodered.org/t/node-red-crypto-trading-bot-hosting/39838)

<div class="topic-metadata">

**Author:** [@kookkook](https://discourse.nodered.org/u/kookkook)\
**Replies:** 2\
**Last updated:** [28 January 2021 06:10 UTC](https://discourse.nodered.org/t/node-red-crypto-trading-bot-hosting/39838 "2021-01-28T06:10:02Z")

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I have developed a node-red crypto trading project which is currently hosted on a desktop in my basement on a fixed IP address. It's not the most reliable setup so I guess the time has come to move to the cloud... What…

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## [Select Input Type in Subflow](https://discourse.nodered.org/t/select-input-type-in-subflow/39871)

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**Author:** [@pranavthakkar](https://discourse.nodered.org/u/pranavthakkar)\
**Replies:** 3\
**Last updated:** [27 January 2021 21:09 UTC](https://discourse.nodered.org/t/select-input-type-in-subflow/39871 "2021-01-27T21:09:31Z")

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Hello there. I was working with subflow properties. where i can pass my env variable to the function node. but for each device id, I have to write its ID in text input. So I choose the "select input type" instead of text…

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## [Fail2ban for mqtts + is fail2ban useful for servers that use only ssh keys to log in?](https://discourse.nodered.org/t/fail2ban-for-mqtts-is-fail2ban-useful-for-servers-that-use-only-ssh-keys-to-log-in/39789)

<div class="topic-metadata">

**Author:** [@saeed1](https://discourse.nodered.org/u/saeed1)\
**Replies:** 6\
**Last updated:** [27 January 2021 22:55 UTC](https://discourse.nodered.org/t/fail2ban-for-mqtts-is-fail2ban-useful-for-servers-that-use-only-ssh-keys-to-log-in/39789 "2021-01-27T22:55:55Z")

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Hello Guys, I have two questions I am trying to set fail2ban for mqtts (port 8883). On my server port 8883 is open for the world. The only, who have credentials for mosquitto, can connect and send data to my server. …

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## [How to handle python and NodeRed](https://discourse.nodered.org/t/how-to-handle-python-and-nodered/39851)

<div class="topic-metadata">

**Author:** [@Ency79](https://discourse.nodered.org/u/Ency79)\
**Replies:** 1\
**Last updated:** [27 January 2021 21:29 UTC](https://discourse.nodered.org/t/how-to-handle-python-and-nodered/39851 "2021-01-27T21:29:17Z")

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Hello Community! I have installed on AWS Nodered with cloudfoundry. I try Now to control a python Script inside nodered. For that i have nodejs and Python buildpacks in my manifest.yml The Problem is that the app need…

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## [How to specify the default context store in function node](https://discourse.nodered.org/t/how-to-specify-the-default-context-store-in-function-node/39859)

<div class="topic-metadata">

**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\
**Replies:** 5\
**Last updated:** [27 January 2021 21:29 UTC](https://discourse.nodered.org/t/how-to-specify-the-default-context-store-in-function-node/39859 "2021-01-27T21:29:13Z")

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I have in settings.js contextStorage: { default: "memoryOnly", memoryOnly: { module: 'memory' }, file: { module: 'localfilesystem' } }, and in a function node I can access memoryOnly or …

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## [Tabular plots representation](https://discourse.nodered.org/t/tabular-plots-representation/39337)

<div class="topic-metadata">

**Author:** [@Munier](https://discourse.nodered.org/u/Munier)\
**Replies:** 7\
**Last updated:** [27 January 2021 21:25 UTC](https://discourse.nodered.org/t/tabular-plots-representation/39337 "2021-01-27T21:25:21Z")

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I would like to represent the following trend plots in a tabular format - meaning the dashboard displays two graphs besides each other instead of this representation:

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## [How to Use Node red uibuilder with PHP?](https://discourse.nodered.org/t/how-to-use-node-red-uibuilder-with-php/39842)

<div class="topic-metadata">

**Author:** [@rocketrange](https://discourse.nodered.org/u/rocketrange)\
**Replies:** 3\
**Last updated:** [27 January 2021 21:25 UTC](https://discourse.nodered.org/t/how-to-use-node-red-uibuilder-with-php/39842 "2021-01-27T21:25:09Z")

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Can use PHP with Ui Builder? Run a website from Ui Builder by PHP.

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## [Returning group height and width (node-red-dashboard)?](https://discourse.nodered.org/t/returning-group-height-and-width-node-red-dashboard/39895)

<div class="topic-metadata">

**Author:** [@lizzardguki](https://discourse.nodered.org/u/lizzardguki)\
**Replies:** 3\
**Last updated:** [27 January 2021 21:18 UTC](https://discourse.nodered.org/t/returning-group-height-and-width-node-red-dashboard/39895 "2021-01-27T21:18:56Z")

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Is it possible to use the ui\_template node to get a group size? I found this StackOverflow post but I am not seeing it work, at least not on firefox... Is there a proper way to do it?

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