# Latest

**URL:** https://discourse.nodered.org/latest.md?page=426

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

**Page:** 427

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## [Extract mp3 url from page, to play on chromecast](https://discourse.nodered.org/t/extract-mp3-url-from-page-to-play-on-chromecast/73091)

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**Author:** [@AVLimburg](https://discourse.nodered.org/u/AVLimburg)\
**Replies:** 7\
**Last updated:** [3 January 2023 18:38 UTC](https://discourse.nodered.org/t/extract-mp3-url-from-page-to-play-on-chromecast/73091 "2023-01-03T18:38:29Z")

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Hi, i'm trying to find a way to play a mp3 file that is updated on a website, to a GoogleHome/Chromecast speaker. Page: Burgernet On the page our police posts messages about missing persons or criminal activities in th…

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## [Use of NodeRed for international weather, climate, ocean, hydrology data exchange](https://discourse.nodered.org/t/use-of-nodered-for-international-weather-climate-ocean-hydrology-data-exchange/73104)

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**Author:** [@greengolfer](https://discourse.nodered.org/u/greengolfer)\
**Replies:** 2\
**Last updated:** [3 January 2023 17:56 UTC](https://discourse.nodered.org/t/use-of-nodered-for-international-weather-climate-ocean-hydrology-data-exchange/73104 "2023-01-03T17:56:05Z")

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Hello, I wanted to share with the community what we have implemented using NodeRed (Thanks to all for the great tool) in the World Meteorological Organisation (WMO). WMO is a United Nation entity in charge of weather, …

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## [LOGO 8.3 no connection](https://discourse.nodered.org/t/logo-8-3-no-connection/73058)

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**Author:** [@orelio](https://discourse.nodered.org/u/orelio)\
**Replies:** 7\
**Last updated:** [3 January 2023 16:03 UTC](https://discourse.nodered.org/t/logo-8-3-no-connection/73058 "2023-01-03T16:03:31Z")

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I have LOGO 8.3 but i don't have connection on logo side i use operaterpanel (02.00 and output 03.00 ) on node-red i use ip adres logo port 102 mode TSAP local TSAP 03.00 remote TSAP 02.00 i have an older logo 8.1…

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## [Thank you to you all](https://discourse.nodered.org/t/thank-you-to-you-all/73097)

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**Author:** [@Linhey](https://discourse.nodered.org/u/Linhey)\
**Replies:** 3\
**Last updated:** [3 January 2023 14:22 UTC](https://discourse.nodered.org/t/thank-you-to-you-all/73097 "2023-01-03T14:22:15Z")

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I don't ask many questions or write very much on this forum, but I just wanted to say a BIG THANK YOU to all those regular geniuses, who repeatedly answer the questions from us mortals. Every time I run into a brick wal…

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## [Read an RPi \*output\* pin state?](https://discourse.nodered.org/t/read-an-rpi-output-pin-state/72137)

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**Author:** [@Rgrove](https://discourse.nodered.org/u/Rgrove)\
**Replies:** 13\
**Last updated:** [3 January 2023 14:36 UTC](https://discourse.nodered.org/t/read-an-rpi-output-pin-state/72137 "2023-01-03T14:36:19Z")

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Good morning... I have an output GPIO in use, but can't seem to poll it for the current state. Users can turn it on and off through the UI. I don't want it re-initialized because I may do a dozen deploys while working …

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## [CRC-8 checksum function](https://discourse.nodered.org/t/crc-8-checksum-function/73087)

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**Author:** [@Angin](https://discourse.nodered.org/u/Angin)\
**Replies:** 9\
**Last updated:** [3 January 2023 14:28 UTC](https://discourse.nodered.org/t/crc-8-checksum-function/73087 "2023-01-03T14:28:28Z")

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Hello everyone, I need a function that can calculate CRC-8, but this is difficult for me, the C algorithm reference is as follows: unsigned char CRC8\_Check(unsigned char \*ptr,unsigned char len) { unsigned char crc;…

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## [Hide or show nodes in dashboard](https://discourse.nodered.org/t/hide-or-show-nodes-in-dashboard/72583)

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**Author:** [@DAD](https://discourse.nodered.org/u/DAD)\
**Replies:** 3\
**Last updated:** [3 January 2023 12:52 UTC](https://discourse.nodered.org/t/hide-or-show-nodes-in-dashboard/72583 "2023-01-03T12:52:23Z")

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Hi, I have a question. Is it possible to hide or show a node in a group in UI. I know you can hide and show groups. is this also possible for nodes? it works for groups: { "group": { "hide": \[ …

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## [Memory Usage - node-red-contrib-os 0.2.1](https://discourse.nodered.org/t/memory-usage-node-red-contrib-os-0-2-1/72549)

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**Author:** [@Manikandan](https://discourse.nodered.org/u/Manikandan)\
**Replies:** 6\
**Last updated:** [3 January 2023 12:34 UTC](https://discourse.nodered.org/t/memory-usage-node-red-contrib-os-0-2-1/72549 "2023-01-03T12:34:18Z")

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Hi , I am new to node-red and JS. In my project i am using the below mentioned CPU Architecture: armv7l Byte Order: Little Endian CPU(s): 4 On-line CPU(s) list: 0-3 Thread(s) per c…

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## [Matter support for node red](https://discourse.nodered.org/t/matter-support-for-node-red/72188)

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**Author:** [@Tomschin](https://discourse.nodered.org/u/Tomschin)\
**Replies:** 15\
**Last updated:** [3 January 2023 12:10 UTC](https://discourse.nodered.org/t/matter-support-for-node-red/72188 "2023-01-03T12:10:33Z")

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There was just one point where I found information about "matter" and "node red". Nodered with matter - Core Development / Feature Requests - Node-RED Forum But no answer. The discussion was closed becouse of time out.…

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## [Showing error message in a dialog](https://discourse.nodered.org/t/showing-error-message-in-a-dialog/73089)

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**Author:** [@syedhannan](https://discourse.nodered.org/u/syedhannan)\
**Replies:** 4\
**Last updated:** [3 January 2023 12:07 UTC](https://discourse.nodered.org/t/showing-error-message-in-a-dialog/73089 "2023-01-03T12:07:33Z")

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I wanted to know is there any way to show error messages other than in the debug console. For example in editor if the user authentication fails then is it possible to show a dialog showing the error instead in the debu…

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## [Getting a Problem to represent Lightings for a house with 3 floors](https://discourse.nodered.org/t/getting-a-problem-to-represent-lightings-for-a-house-with-3-floors/73096)

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**Author:** [@Vikas](https://discourse.nodered.org/u/Vikas)\
**Replies:** 5\
**Last updated:** [3 January 2023 12:01 UTC](https://discourse.nodered.org/t/getting-a-problem-to-represent-lightings-for-a-house-with-3-floors/73096 "2023-01-03T12:01:42Z")

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Any assistance will be greatly appreciated. The Question is Q)-Create a flow that simulates light switches and lights in a house. Search for suitable visualisation palettes that map a switch (on / off) and use it on …

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## [Failing to install nodered-contrib-face-recognition](https://discourse.nodered.org/t/failing-to-install-nodered-contrib-face-recognition/73070)

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**Author:** [@Barbudor](https://discourse.nodered.org/u/Barbudor)\
**Replies:** 3\
**Last updated:** [3 January 2023 08:29 UTC](https://discourse.nodered.org/t/failing-to-install-nodered-contrib-face-recognition/73070 "2023-01-03T08:29:21Z")

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Hello We are failling to install the node node-red-contrib-face-recognition in a Fargate container running nodered/node-red:3.0.2-16. It fails even in a clean, created-from scratch, container so no existing dependencie…

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## [Why can't we add elements to the "form" node similar to how we can use msg.option on "dropdown"?](https://discourse.nodered.org/t/why-cant-we-add-elements-to-the-form-node-similar-to-how-we-can-use-msg-option-on-dropdown/73084)

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**Author:** [@HerrTuulik](https://discourse.nodered.org/u/HerrTuulik)\
**Replies:** 2\
**Last updated:** [3 January 2023 07:06 UTC](https://discourse.nodered.org/t/why-cant-we-add-elements-to-the-form-node-similar-to-how-we-can-use-msg-option-on-dropdown/73084 "2023-01-03T07:06:32Z")

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Hello I wish to define the elements on a form using msg properties by sending it an array of objects. Unfortunately the node does not currently support this. Looking for any suggestions, alternatives.

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## [Unittest node helper and npm dependency issues](https://discourse.nodered.org/t/unittest-node-helper-and-npm-dependency-issues/72928)

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**Author:** [@kakyoism](https://discourse.nodered.org/u/kakyoism)\
**Replies:** 1\
**Last updated:** [3 January 2023 06:33 UTC](https://discourse.nodered.org/t/unittest-node-helper-and-npm-dependency-issues/72928 "2023-01-03T06:33:42Z")

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I'm facing a weird npm dependency issue when trying to install node-red-node-test-helper with custom nodes and a globally installed Node-RED v2.0.5. The expected dependency situation is like this: All custom nodes sha…

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## [Need help debugging a unittest](https://discourse.nodered.org/t/need-help-debugging-a-unittest/72413)

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**Author:** [@kakyoism](https://discourse.nodered.org/u/kakyoism)\
**Replies:** 9\
**Last updated:** [23 December 2022 09:23 UTC](https://discourse.nodered.org/t/need-help-debugging-a-unittest/72413 "2022-12-23T09:23:19Z")

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I build a custom node and want to unittest it using node-red-node-test-helper. I first make a custom flow in Node-RED and exported it. Then I follow the examples to turn that flow json object into a pure node array. Fin…

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## [Cannot "unhide" dashboard chart lines](https://discourse.nodered.org/t/cannot-unhide-dashboard-chart-lines/73066)

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**Author:** [@jbudd](https://discourse.nodered.org/u/jbudd)\
**Replies:** 4\
**Last updated:** [2 January 2023 23:35 UTC](https://discourse.nodered.org/t/cannot-unhide-dashboard-chart-lines/73066 "2023-01-02T23:35:09Z")

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I am hiding selected lines on a chart (by nullifying that element of the chart data array and redrawing) This works, and I can have a Reset button to redraw all the lines. Except... If I hide all the lines on the chart…

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## [Does typedInput save typed values?](https://discourse.nodered.org/t/does-typedinput-save-typed-values/72972)

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**Author:** [@tve](https://discourse.nodered.org/u/tve)\
**Replies:** 16\
**Last updated:** [2 January 2023 22:48 UTC](https://discourse.nodered.org/t/does-typedinput-save-typed-values/72972 "2023-01-02T22:48:56Z")

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I'm always confused about what typedInput saves into the node and wonder whether I'm doing something wrong or this is as-designed... If I have a typedInput and select the number type or boolean type, will the node get a…

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## [HOW TO - Sonoff Zigbee 3.0 Dongle Plus on Debian running on HP2000](https://discourse.nodered.org/t/how-to-sonoff-zigbee-3-0-dongle-plus-on-debian-running-on-hp2000/72475)

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**Author:** [@nodeBoy816](https://discourse.nodered.org/u/nodeBoy816)\
**Replies:** 5\
**Last updated:** [2 January 2023 21:02 UTC](https://discourse.nodered.org/t/how-to-sonoff-zigbee-3-0-dongle-plus-on-debian-running-on-hp2000/72475 "2023-01-02T21:02:43Z")

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Hello All and sorry for the newbie question, but I'm having a bit of trouble installing my Sonoff Zigbee 3.0 Dongle Plus on my Debian 11 laptop (HP2000). When I plug the dongle in I get nothing (no lights, etc). I've tri…

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## [Is there another solution instead using $.getScript(..) for once add external client javascript in created node html file?](https://discourse.nodered.org/t/is-there-another-solution-instead-using-getscript-for-once-add-external-client-javascript-in-created-node-html-file/73048)

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**Author:** [@studiobox](https://discourse.nodered.org/u/studiobox)\
**Replies:** 8\
**Last updated:** [2 January 2023 20:51 UTC](https://discourse.nodered.org/t/is-there-another-solution-instead-using-getscript-for-once-add-external-client-javascript-in-created-node-html-file/73048 "2023-01-02T20:51:43Z")

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Hi, At first, I have follow bellow topic for add external client javascript in created node html file. Include JS in a html custom module - General - Node-RED Forum (nodered.org) Include JS in a html custom module - G…

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## [NodeRed not getting persisting messages from MQTT Broker after offline](https://discourse.nodered.org/t/nodered-not-getting-persisting-messages-from-mqtt-broker-after-offline/73033)

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**Author:** [@ickidebary](https://discourse.nodered.org/u/ickidebary)\
**Replies:** 8\
**Last updated:** [2 January 2023 19:30 UTC](https://discourse.nodered.org/t/nodered-not-getting-persisting-messages-from-mqtt-broker-after-offline/73033 "2023-01-02T19:30:42Z")

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Hi Folks, Similar to this thread, but, I've read it all and tried a lot of the things, afraid I'm still stuck. (I'd really like to avoid using a database to solve this, I'm a pretty average programmer, my application…

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## [Struggling with JavaScript syntax](https://discourse.nodered.org/t/struggling-with-javascript-syntax/73073)

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**Author:** [@Nivek1612](https://discourse.nodered.org/u/Nivek1612)\
**Replies:** 4\
**Last updated:** [2 January 2023 18:38 UTC](https://discourse.nodered.org/t/struggling-with-javascript-syntax/73073 "2023-01-02T18:38:07Z")

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Ok so I’m a newbie Struggling with syntax I have the following multicast being passed to a function in node-red "\<electricity id='xxxxxxxx' ver='2.0'\>\<timestamp\>1672667665\</timestamp\>\<signal rssi='-56' lqi='1'/\>\<batte…

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## [How to chose an entity attribute in a node](https://discourse.nodered.org/t/how-to-chose-an-entity-attribute-in-a-node/72790)

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**Author:** [@Rincovanderbeek](https://discourse.nodered.org/u/Rincovanderbeek)\
**Replies:** 2\
**Last updated:** [2 January 2023 18:35 UTC](https://discourse.nodered.org/t/how-to-chose-an-entity-attribute-in-a-node/72790 "2023-01-02T18:35:52Z")

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H, I have an enity containing multiple attributes to change the setting of my converter.. My output of thenode needs to change the attribute. However, these attribues are not being displayed by the node automatically. …

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## [State node always displays first entity in list](https://discourse.nodered.org/t/state-node-always-displays-first-entity-in-list/73060)

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**Author:** [@SimonM](https://discourse.nodered.org/u/SimonM)\
**Replies:** 4\
**Last updated:** [2 January 2023 17:30 UTC](https://discourse.nodered.org/t/state-node-always-displays-first-entity-in-list/73060 "2023-01-02T17:30:28Z")

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Hi all, I've an odd problem that I can't figure out. For all of my state nodes, when re-editing them the entity dropdown is displaying the wrong entity it always shows the first available entity in the list. :confused: …

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## [Trying to disect a payload object and combine parts into msg.options](https://discourse.nodered.org/t/trying-to-disect-a-payload-object-and-combine-parts-into-msg-options/73069)

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**Author:** [@Mikee1234K](https://discourse.nodered.org/u/Mikee1234K)\
**Replies:** 2\
**Last updated:** [2 January 2023 16:00 UTC](https://discourse.nodered.org/t/trying-to-disect-a-payload-object-and-combine-parts-into-msg-options/73069 "2023-01-02T16:00:48Z")

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I am querying a Sonos node to get my saved favourite radio stations to send to a dashboard dropdown node. From what I have researched, I should be sending it as a msg.options object. I have located the parts of where my…

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## [Opentherm Thermostat](https://discourse.nodered.org/t/opentherm-thermostat/72954)

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**Author:** [@maxuser74](https://discourse.nodered.org/u/maxuser74)\
**Replies:** 6\
**Last updated:** [2 January 2023 14:27 UTC](https://discourse.nodered.org/t/opentherm-thermostat/72954 "2023-01-02T14:27:22Z")

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Hi guys, I want to share my implementation of Opentherm Tasmota and its integration with a template node in Node Red Dashboard. I use it to remotely command the central heating boiler into my holiday house. The hardwa…

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## [Creating nodes - class concept](https://discourse.nodered.org/t/creating-nodes-class-concept/73035)

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**Author:** [@agmacedo](https://discourse.nodered.org/u/agmacedo)\
**Replies:** 4\
**Last updated:** [2 January 2023 14:14 UTC](https://discourse.nodered.org/t/creating-nodes-class-concept/73035 "2023-01-02T14:14:41Z")

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What is the best way to create new nodes and use it in Node-red app. Something like the class concepts in c#. My idea is to create a node to use as a template in different situations, like a form data enter to transfer d…

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## [Passing from and to date and time to http request node](https://discourse.nodered.org/t/passing-from-and-to-date-and-time-to-http-request-node/73045)

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**Author:** [@Jhankhana](https://discourse.nodered.org/u/Jhankhana)\
**Replies:** 2\
**Last updated:** [2 January 2023 11:12 UTC](https://discourse.nodered.org/t/passing-from-and-to-date-and-time-to-http-request-node/73045 "2023-01-02T11:12:50Z")

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Hello! Need help! I am trying to read value of current date and time to pass it to http request node. Please help me with this. \[{"id":"ab460fa4.e776e","type":"ui\_button","z":"24076265.de751e","name":"","group":"6b69…

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## [How to compare and evaluate values in the function node](https://discourse.nodered.org/t/how-to-compare-and-evaluate-values-in-the-function-node/73054)

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**Author:** [@Dom1](https://discourse.nodered.org/u/Dom1)\
**Replies:** 1\
**Last updated:** [2 January 2023 10:00 UTC](https://discourse.nodered.org/t/how-to-compare-and-evaluate-values-in-the-function-node/73054 "2023-01-02T10:00:35Z")

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Hello Guys I'm stuck probably with a beginner problem. I want, if the Input "ns=4;s=Arp.Plc.Eclr/M\_HS\_Node\_Red\_1" is not equal "1" and the input "ns=4;s=Arp.Plc.Eclr/M\_HS\_Node\_Red\_Anf" is "true" then send out "true" e…

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## [Node-red-contrib-azure-iot-hub - Quotes in data and unencrypted body](https://discourse.nodered.org/t/node-red-contrib-azure-iot-hub-quotes-in-data-and-unencrypted-body/20873)

<div class="topic-metadata">

**Author:** [@TePeBoxer](https://discourse.nodered.org/u/TePeBoxer)\
**Replies:** 2\
**Last updated:** [2 January 2023 09:02 UTC](https://discourse.nodered.org/t/node-red-contrib-azure-iot-hub-quotes-in-data-and-unencrypted-body/20873 "2023-01-02T09:02:53Z")

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Hi, just getting used to Azure IoT Hub integration with Node-RED. Two questions around node-red-contrib-azure-iot-hub: how can I get quoted texts into the data area? The example is not using them, without escape char…

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## [Bigger text - stage text in Dashboard](https://discourse.nodered.org/t/bigger-text-stage-text-in-dashboard/73025)

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**Author:** [@Felix](https://discourse.nodered.org/u/Felix)\
**Replies:** 6\
**Last updated:** [2 January 2023 08:37 UTC](https://discourse.nodered.org/t/bigger-text-stage-text-in-dashboard/73025 "2023-01-02T08:37:00Z")

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Hi all. Is there a possibility to make a bigger text (node ?) for "stage text" ... maximum size of font I think is about 160. This is not unsatisfactory size. f.e. if you need read text from longer distance, it may be in…

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