# Latest

**URL:** https://discourse.nodered.org/latest.md?page=499

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

**Page:** 500

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## [Hex serial output](https://discourse.nodered.org/t/hex-serial-output/67707)

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**Author:** [@173](https://discourse.nodered.org/u/173)\
**Replies:** 4\
**Last updated:** [15 September 2022 10:29 UTC](https://discourse.nodered.org/t/hex-serial-output/67707 "2022-09-15T10:29:58Z")

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Hi to everybody, I am working with serial-in/out nodes from node-red-node-serialport 0.11.0. I have a hex message that I want to out directly but the module deliver the string as ASCII string or binary buffers. Any id…

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## [Reusing set-cookie from response headers in HTTP request](https://discourse.nodered.org/t/reusing-set-cookie-from-response-headers-in-http-request/67482)

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**Author:** [@josechu](https://discourse.nodered.org/u/josechu)\
**Replies:** 21\
**Last updated:** [15 September 2022 08:35 UTC](https://discourse.nodered.org/t/reusing-set-cookie-from-response-headers-in-http-request/67482 "2022-09-15T08:35:26Z")

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Hi all, I'm struggling a bit to create an http flow in node-red... I've been fighting for some days, going ahead, but not achieving the final result, so any help will be a lot :slight\_smile: This is tied to this issue,…

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## [How to make PDF from HTML](https://discourse.nodered.org/t/how-to-make-pdf-from-html/67688)

<div class="topic-metadata">

**Author:** [@smitterer](https://discourse.nodered.org/u/smitterer)\
**Replies:** 9\
**Last updated:** [15 September 2022 08:13 UTC](https://discourse.nodered.org/t/how-to-make-pdf-from-html/67688 "2022-09-15T08:13:21Z")

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Hi, Since I came across some limitations in node-red-contrib-pdf (for example not being able to change the paper size) and seeing that the node seems to be deprecated, I'm trying to switch over to html-pdf-node - npm. I…

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## [Config Node Select not working](https://discourse.nodered.org/t/config-node-select-not-working/67698)

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**Author:** [@alevher](https://discourse.nodered.org/u/alevher)\
**Replies:** 2\
**Last updated:** [15 September 2022 07:58 UTC](https://discourse.nodered.org/t/config-node-select-not-working/67698 "2022-09-15T07:58:02Z")

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hello everyone, i'm trying to develop a config node with a select inside for the type of the db. The select never saves its value, it takes the first option in the html and there's nothing i can do about it, even the de…

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## [JSON Crack - heads visual JSON](https://discourse.nodered.org/t/json-crack-heads-visual-json/67736)

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**Author:** [@iiLaw](https://discourse.nodered.org/u/iiLaw)\
**Replies:** 0\
**Last updated:** [15 September 2022 07:33 UTC](https://discourse.nodered.org/t/json-crack-heads-visual-json/67736 "2022-09-15T07:33:17Z")

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The jsoneditoronline.org editor is my goto but sometimes I wish I could see the structure. Discovered JSON crack JSON Crack - Crack your data into pieces might be of help to some folk.

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## [External package gives error](https://discourse.nodered.org/t/external-package-gives-error/67723)

<div class="topic-metadata">

**Author:** [@lastheim](https://discourse.nodered.org/u/lastheim)\
**Replies:** 1\
**Last updated:** [14 September 2022 21:32 UTC](https://discourse.nodered.org/t/external-package-gives-error/67723 "2022-09-14T21:32:01Z")

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Hi, Im trying to add an external package, node-mavlink, to be able to use it in a function node in a node red flow. Im running node red in docker so Ive installed the package in /data and updated the settings.js file: …

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## [Restart a branch iteratively](https://discourse.nodered.org/t/restart-a-branch-iteratively/67715)

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**Author:** [@denissanga](https://discourse.nodered.org/u/denissanga)\
**Replies:** 2\
**Last updated:** [14 September 2022 19:30 UTC](https://discourse.nodered.org/t/restart-a-branch-iteratively/67715 "2022-09-14T19:30:18Z")

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Hi all I would like restart a branch iteratively. Now I set a injection with repeat function but the minimum step time is 1s. How I can restart many times as in a ladder code for example plc hardware? Many thanks

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## [Change value shown on the slider](https://discourse.nodered.org/t/change-value-shown-on-the-slider/67716)

<div class="topic-metadata">

**Author:** [@coco\_linton](https://discourse.nodered.org/u/coco_linton)\
**Replies:** 3\
**Last updated:** [14 September 2022 19:05 UTC](https://discourse.nodered.org/t/change-value-shown-on-the-slider/67716 "2022-09-14T19:05:43Z")

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I'm using a slider to set some limits for a variable selected from a drop-down list. One variable has values in the range of 1000-2000 while others are in the range of 10-100. I set the slider range to 10 - 100 and then …

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## [Audio Pre-Amp/Amp with API](https://discourse.nodered.org/t/audio-pre-amp-amp-with-api/67408)

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**Author:** [@TheadehAnank](https://discourse.nodered.org/u/TheadehAnank)\
**Replies:** 1\
**Last updated:** [14 September 2022 18:11 UTC](https://discourse.nodered.org/t/audio-pre-amp-amp-with-api/67408 "2022-09-14T18:11:51Z")

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Anyone aware of an audio pre-amp / amp with an API that could be controlled with Node Red? Personally I'm not looking for audiophile grade, but whatever you're aware of I think would be worthwhile posting for the communi…

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## [Node-RED for code generation](https://discourse.nodered.org/t/node-red-for-code-generation/67683)

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**Author:** [@jamesd256](https://discourse.nodered.org/u/jamesd256)\
**Replies:** 6\
**Last updated:** [14 September 2022 17:58 UTC](https://discourse.nodered.org/t/node-red-for-code-generation/67683 "2022-09-14T17:58:18Z")

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Has anyone else thought of, or attempted to use NR as a visual code generator for an external language? In my case of interest that would be Lua. However the application for this I have in mind might work if Node-RED c…

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## [New Utility: alternate-node-red-installer](https://discourse.nodered.org/t/new-utility-alternate-node-red-installer/13490)

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**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 24\
**Last updated:** [1 November 2021 15:28 UTC](https://discourse.nodered.org/t/new-utility-alternate-node-red-installer/13490 "2021-11-01T15:28:15Z")

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Hi all, as I'm needing to install some clean installations of Node-RED for testing, I thought that I would finally get round to writing a proper tool for installing multiple independent instances of Node-RED. I've just …

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## [Fatek communication](https://discourse.nodered.org/t/fatek-communication/67712)

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**Author:** [@German](https://discourse.nodered.org/u/German)\
**Replies:** 0\
**Last updated:** [14 September 2022 17:11 UTC](https://discourse.nodered.org/t/fatek-communication/67712 "2022-09-14T17:11:08Z")

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hello! I am trying to bring information by Ethernet from a fatek plc, but I did not find any node to do it, could someone help me?!

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## [Node-snmp error](https://discourse.nodered.org/t/node-snmp-error/67633)

<div class="topic-metadata">

**Author:** [@jonkers71](https://discourse.nodered.org/u/jonkers71)\
**Replies:** 7\
**Last updated:** [14 September 2022 17:05 UTC](https://discourse.nodered.org/t/node-snmp-error/67633 "2022-09-14T17:05:48Z")

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Hi all. Trying to use node-red-node-snmp on an Opto22 groov RIO. when if i try snmp walk node-red just restarts and if i try to get just one OID i get the following. 13‎/‎09‎/‎2022‎ ‎12‎:‎59‎:‎40‎ ‎PM\[node: eebcb0f2cc…

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## [Something is hapening i dont know](https://discourse.nodered.org/t/something-is-hapening-i-dont-know/67626)

<div class="topic-metadata">

**Author:** [@mike-farur](https://discourse.nodered.org/u/mike-farur)\
**Replies:** 3\
**Last updated:** [14 September 2022 14:14 UTC](https://discourse.nodered.org/t/something-is-hapening-i-dont-know/67626 "2022-09-14T14:14:01Z")

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help! im was playing opc ua with tia portal everything was fine and then this happened for some reason after some seconds, it says the server crasheh, ive tried to repair node sj, then restart the computer, still the sa…

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## [OPC UA Alarm&Event server](https://discourse.nodered.org/t/opc-ua-alarm-event-server/67603)

<div class="topic-metadata">

**Author:** [@bjorningeo](https://discourse.nodered.org/u/bjorningeo)\
**Replies:** 1\
**Last updated:** [14 September 2022 13:40 UTC](https://discourse.nodered.org/t/opc-ua-alarm-event-server/67603 "2022-09-14T13:40:32Z")

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Is there a node that can be an OPC UA Alarm&Event server ? eny exmple flows ?

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## [The request is invalid error](https://discourse.nodered.org/t/the-request-is-invalid-error/67699)

<div class="topic-metadata">

**Author:** [@MiliH](https://discourse.nodered.org/u/MiliH)\
**Replies:** 1\
**Last updated:** [14 September 2022 13:35 UTC](https://discourse.nodered.org/t/the-request-is-invalid-error/67699 "2022-09-14T13:35:54Z")

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Hello, Greeting! When I am passing parameter in REST API in HTTP request node, it is throwing the request is invalid error. I am passing parameter in below format Find error snap below

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## [Strange MQTT connection issue](https://discourse.nodered.org/t/strange-mqtt-connection-issue/65626)

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**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 1\
**Last updated:** [26 July 2022 07:45 UTC](https://discourse.nodered.org/t/strange-mqtt-connection-issue/65626 "2022-07-26T07:45:47Z")

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I'm hoping that by simply writing my problem out - the answer will leap out at me :slight\_smile: So got this and backed up by this in my console I DON'T ADAM AND EVE IT!!! Just by simply starting to write this p…

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## [Feature Request: Allow link call to set it's own context for flow variables](https://discourse.nodered.org/t/feature-request-allow-link-call-to-set-its-own-context-for-flow-variables/67694)

<div class="topic-metadata">

**Author:** [@JadinAndrews](https://discourse.nodered.org/u/JadinAndrews)\
**Replies:** 1\
**Last updated:** [14 September 2022 11:21 UTC](https://discourse.nodered.org/t/feature-request-allow-link-call-to-set-its-own-context-for-flow-variables/67694 "2022-09-14T11:21:45Z")

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Hi NodeRed devs! I have been an avid user of NodeRed over the past few years, but fairly silent on the community. I have built fairly complex flows and today I bumped into an issue that could be solved fairly easily wit…

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## [Librato Metrics](https://discourse.nodered.org/t/librato-metrics/67689)

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**Author:** [@hermiot](https://discourse.nodered.org/u/hermiot)\
**Replies:** 1\
**Last updated:** [14 September 2022 10:32 UTC](https://discourse.nodered.org/t/librato-metrics/67689 "2022-09-14T10:32:23Z")

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Hi, is anyone using librato service? I'm using the GitHub - hubofthings/node-red-contrib-librato: A Node-RED node to send metrics to Librato. node. The Metric is shown on librato, but it doesn't contain data. Thanks!

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## [How do I write dynamic data to Postgres DB](https://discourse.nodered.org/t/how-do-i-write-dynamic-data-to-postgres-db/67682)

<div class="topic-metadata">

**Author:** [@eldho1416](https://discourse.nodered.org/u/eldho1416)\
**Replies:** 3\
**Last updated:** [14 September 2022 10:09 UTC](https://discourse.nodered.org/t/how-do-i-write-dynamic-data-to-postgres-db/67682 "2022-09-14T10:09:26Z")

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Hello Everyone, I'm doing a project in which I want to send data to my local MQTT broker and I will get the data in nodered by subscribing to the MQTT broker. Now I want to Insert the data coming out from "MQTT in" node…

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## [Change incoming MQTT payload and send it to Tasmota](https://discourse.nodered.org/t/change-incoming-mqtt-payload-and-send-it-to-tasmota/67686)

<div class="topic-metadata">

**Author:** [@Fliacik](https://discourse.nodered.org/u/Fliacik)\
**Replies:** 3\
**Last updated:** [14 September 2022 09:34 UTC](https://discourse.nodered.org/t/change-incoming-mqtt-payload-and-send-it-to-tasmota/67686 "2022-09-14T09:34:29Z")

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Hi there. Please I need help with convert incoming message from my ORNO WE 516 to readable domoticz values. On input from MQTT i get this message in string form: tele/tasmota\_147B98/SENSOR : msg.payload : string\[316\] {…

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## [Dynamic subscription unsubscribe-from-all (and docs)](https://discourse.nodered.org/t/dynamic-subscription-unsubscribe-from-all-and-docs/67675)

<div class="topic-metadata">

**Author:** [@tymarbut](https://discourse.nodered.org/u/tymarbut)\
**Replies:** 1\
**Last updated:** [14 September 2022 06:43 UTC](https://discourse.nodered.org/t/dynamic-subscription-unsubscribe-from-all-and-docs/67675 "2022-09-14T06:43:06Z")

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Hi all, This may be a question specifically for @Steve-Mcl - I've been looking everywhere for documentation of the new Dynamic Subscription feature in the MQTT Input node, and just can't find it. I did find this discus…

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## [row.getCell(columnName) in nodered-ui-Table doesn't work](https://discourse.nodered.org/t/row-getcell-columnname-in-nodered-ui-table-doesnt-work/67674)

<div class="topic-metadata">

**Author:** [@Henjoe](https://discourse.nodered.org/u/Henjoe)\
**Replies:** 0\
**Last updated:** [14 September 2022 05:49 UTC](https://discourse.nodered.org/t/row-getcell-columnname-in-nodered-ui-table-doesnt-work/67674 "2022-09-14T05:49:10Z")

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Hi I am trying to use the row.getCell(column) in my nodered-ui-Table so that when a user edited a specific cells or rows it will send a callbacks. However, it seems like this function is not functioning well. I have co…

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## [Split a string of a Location Payload from Datacake and pass it to Home Assistant as coordinates](https://discourse.nodered.org/t/split-a-string-of-a-location-payload-from-datacake-and-pass-it-to-home-assistant-as-coordinates/67664)

<div class="topic-metadata">

**Author:** [@jordes2020](https://discourse.nodered.org/u/jordes2020)\
**Replies:** 2\
**Last updated:** [14 September 2022 03:06 UTC](https://discourse.nodered.org/t/split-a-string-of-a-location-payload-from-datacake-and-pass-it-to-home-assistant-as-coordinates/67664 "2022-09-14T03:06:58Z")

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I get a location payload from Datacake as a string separated by the coma. I want to separate it to two single values to pass it on to Home Assistant as single values latitude and longitude. Does anyone know how I separat…

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## [Function to convert analog input value!](https://discourse.nodered.org/t/function-to-convert-analog-input-value/67636)

<div class="topic-metadata">

**Author:** [@everklein](https://discourse.nodered.org/u/everklein)\
**Replies:** 2\
**Last updated:** [14 September 2022 01:51 UTC](https://discourse.nodered.org/t/function-to-convert-analog-input-value/67636 "2022-09-14T01:51:07Z")

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I'm reading an analog input with node-red-contrib-s7 and would like to convert this analog value to a scale from 0 to 100. Any tips on how to get the function to convert?

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## [Help with Ng and ui Template Carousel](https://discourse.nodered.org/t/help-with-ng-and-ui-template-carousel/67652)

<div class="topic-metadata">

**Author:** [@PdeJ](https://discourse.nodered.org/u/PdeJ)\
**Replies:** 2\
**Last updated:** [13 September 2022 20:07 UTC](https://discourse.nodered.org/t/help-with-ng-and-ui-template-carousel/67652 "2022-09-13T20:07:21Z")

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I am using the ui Template for a picture carousel, with ng-swipes incrementing or decrementing the index value which I can send out of the Template as a payload. However, I cannot find a way to read input msg values into…

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## [Elasticsearch node](https://discourse.nodered.org/t/elasticsearch-node/67662)

<div class="topic-metadata">

**Author:** [@juancavila](https://discourse.nodered.org/u/juancavila)\
**Replies:** 0\
**Last updated:** [13 September 2022 17:17 UTC](https://discourse.nodered.org/t/elasticsearch-node/67662 "2022-09-13T17:17:57Z")

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Hello, could you help me? I want to send data to Elasticsearch Cloud, but the only node I was able to connect to is "node-red-contrib-elastic" (node-red-contrib-elastic (node) - Node-RED) because it uses server ID (clus…

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## [Adding Certain data tags to a data received by a sensor](https://discourse.nodered.org/t/adding-certain-data-tags-to-a-data-received-by-a-sensor/67513)

<div class="topic-metadata">

**Author:** [@Hossam\_Ali](https://discourse.nodered.org/u/Hossam_Ali)\
**Replies:** 24\
**Last updated:** [13 September 2022 17:17 UTC](https://discourse.nodered.org/t/adding-certain-data-tags-to-a-data-received-by-a-sensor/67513 "2022-09-13T17:17:10Z")

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Hello Everyone, I am receiving a data from a sensor with a certain data tags {Device}. {Events} but I would like to change this data tags to match this format: {line}.{unit/system/function}.{device/function}\[.{device/f…

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## [Shelly updated light conditions](https://discourse.nodered.org/t/shelly-updated-light-conditions/67528)

<div class="topic-metadata">

**Author:** [@TorstenHa](https://discourse.nodered.org/u/TorstenHa)\
**Replies:** 4\
**Last updated:** [13 September 2022 16:56 UTC](https://discourse.nodered.org/t/shelly-updated-light-conditions/67528 "2022-09-13T16:56:51Z")

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hello everybody, i am very new to the universe of node red. so forgive me if the right answer is already figured out. from the beginning, i used for all the time till now the alexa app to do my tasks. i have 40 devices…

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## [Fix characters changed by template node](https://discourse.nodered.org/t/fix-characters-changed-by-template-node/67661)

<div class="topic-metadata">

**Author:** [@josechu](https://discourse.nodered.org/u/josechu)\
**Replies:** 2\
**Last updated:** [13 September 2022 16:29 UTC](https://discourse.nodered.org/t/fix-characters-changed-by-template-node/67661 "2022-09-13T16:29:12Z")

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Hi, Im using a template node tu build an email body with some payload variables, like this: \<b\>Date:\</b\> {{payload.0.fecha}} \<br\> \<br\> Comentario1: {{payload.1.texto}} It's coming good but when any of that values, in …

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