# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=420

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

**Page:** 421

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## [How to download the modbus?](https://discourse.nodered.org/t/how-to-download-the-modbus/58510)

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**Author:** [@UnknownForever](https://discourse.nodered.org/u/UnknownForever)\
**Replies:** 2\
**Last updated:** [17 February 2022 07:42 UTC](https://discourse.nodered.org/t/how-to-download-the-modbus/58510 "2022-02-17T07:42:31Z")

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Hi guys, Could anyone tell me how to download the modbus in node red. I try to download using the manage palette but its shows error and I also try download using cmd. Its also failed. So could anyone tell me how to dow…

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## [Questionmark in red diamond](https://discourse.nodered.org/t/questionmark-in-red-diamond/58394)

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**Author:** [@grawsom](https://discourse.nodered.org/u/grawsom)\
**Replies:** 2\
**Last updated:** [17 February 2022 07:29 UTC](https://discourse.nodered.org/t/questionmark-in-red-diamond/58394 "2022-02-17T07:29:46Z")

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This one I can't find a solution for, so if someone could send me in the right direction. I have this "test" flow, that send a message as buffer, that one gives me red diamond with question mark. If I receive as sting …

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## [Read a csv file from a specific line](https://discourse.nodered.org/t/read-a-csv-file-from-a-specific-line/58489)

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**Author:** [@AlfEng](https://discourse.nodered.org/u/AlfEng)\
**Replies:** 5\
**Last updated:** [16 February 2022 22:01 UTC](https://discourse.nodered.org/t/read-a-csv-file-from-a-specific-line/58489 "2022-02-16T22:01:05Z")

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I have in a txt file stored the line number that I previously read from a csv file. Since this csv file can be updated by adding 1 or more lines, how can I read this csv starting from the following line from the last li…

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## [UI nodes missing after updating node-red on windows](https://discourse.nodered.org/t/ui-nodes-missing-after-updating-node-red-on-windows/58485)

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**Author:** [@that-jim](https://discourse.nodered.org/u/that-jim)\
**Replies:** 6\
**Last updated:** [16 February 2022 21:12 UTC](https://discourse.nodered.org/t/ui-nodes-missing-after-updating-node-red-on-windows/58485 "2022-02-16T21:12:55Z")

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I get the following warning when I start node-red on my windows machine, and my ui nodes are missing. 16 Feb 11:30:42 - \[warn\] Your flow credentials file is encrypted using a system-generated key. If the system-gener…

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## [SQLite SELECT from node-red function return nothing but in DB browser works fine](https://discourse.nodered.org/t/sqlite-select-from-node-red-function-return-nothing-but-in-db-browser-works-fine/58486)

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**Author:** [@dm2jokes](https://discourse.nodered.org/u/dm2jokes)\
**Replies:** 10\
**Last updated:** [16 February 2022 20:56 UTC](https://discourse.nodered.org/t/sqlite-select-from-node-red-function-return-nothing-but-in-db-browser-works-fine/58486 "2022-02-16T20:56:32Z")

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Well Hi first! I'm a new with SQLite database, so problem is that SELECT statement in DB browser works just fine but in function node nothing is return. DB Browser Flow \[ { "id": "2c85767fe0fb433d", …

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## [Modbus TCP float to value](https://discourse.nodered.org/t/modbus-tcp-float-to-value/58393)

<div class="topic-metadata">

**Author:** [@Milanovic](https://discourse.nodered.org/u/Milanovic)\
**Replies:** 35\
**Last updated:** [16 February 2022 20:10 UTC](https://discourse.nodered.org/t/modbus-tcp-float-to-value/58393 "2022-02-16T20:10:03Z")

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How can I change the float value that I receive from the Modbus TCP to the correct value? I tried it with this nodes but that didn't work

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## [Package.json not updated when additional nodes are upgraded](https://discourse.nodered.org/t/package-json-not-updated-when-additional-nodes-are-upgraded/58368)

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**Author:** [@essereumano](https://discourse.nodered.org/u/essereumano)\
**Replies:** 4\
**Last updated:** [16 February 2022 19:12 UTC](https://discourse.nodered.org/t/package-json-not-updated-when-additional-nodes-are-upgraded/58368 "2022-02-16T19:12:31Z")

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Hi, using projects I noticed that if I update the nodes from the palette manager the new version is not reported on the package.json and consequently not even on the dependencies tab in project settings. is it a desired …

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## [How to process multiple data](https://discourse.nodered.org/t/how-to-process-multiple-data/58367)

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**Author:** [@alda](https://discourse.nodered.org/u/alda)\
**Replies:** 24\
**Last updated:** [16 February 2022 18:41 UTC](https://discourse.nodered.org/t/how-to-process-multiple-data/58367 "2022-02-16T18:41:10Z")

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Hi, Via TCP communication I'm receiving buffer of HEX data about real temperature of 16 devices. To show value I must recalculate via function. Is it necessary have a special function for each one or is possible have …

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## [Needing help with splitting a message into parts and having those](https://discourse.nodered.org/t/needing-help-with-splitting-a-message-into-parts-and-having-those/58434)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 4\
**Last updated:** [16 February 2022 16:21 UTC](https://discourse.nodered.org/t/needing-help-with-splitting-a-message-into-parts-and-having-those/58434 "2022-02-16T16:21:32Z")

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For instance the msg.payload is this: DayEnd,33,128,99 I want to derive 4 variables: time, r, g and b to use in the same node to do things.

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## [Failed at step GROUP spawning /usr/bin/env: No such process](https://discourse.nodered.org/t/failed-at-step-group-spawning-usr-bin-env-no-such-process/58306)

<div class="topic-metadata">

**Author:** [@quemf](https://discourse.nodered.org/u/quemf)\
**Replies:** 4\
**Last updated:** [16 February 2022 16:16 UTC](https://discourse.nodered.org/t/failed-at-step-group-spawning-usr-bin-env-no-such-process/58306 "2022-02-16T16:16:58Z")

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Hi, I've been using node-red for a while now, and today I realized that I can't execute it from my laptop, and I can't find the reason. I tried to uninstall it with these recommendations: I installed it again with th…

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## [Context value, bit to word. Bit is refreshed with value 0 but word keep with 1 value](https://discourse.nodered.org/t/context-value-bit-to-word-bit-is-refreshed-with-value-0-but-word-keep-with-1-value/58315)

<div class="topic-metadata">

**Author:** [@pautorras](https://discourse.nodered.org/u/pautorras)\
**Replies:** 3\
**Last updated:** [15 February 2022 21:39 UTC](https://discourse.nodered.org/t/context-value-bit-to-word-bit-is-refreshed-with-value-0-but-word-keep-with-1-value/58315 "2022-02-15T21:39:08Z")

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Hi folks, I've serched for something similar to my issue, but I have'nt found. A dashboard button send value 1 if is pressed. After 5 seconds (delay), this bit is set to 0 again. With function setbit, bit 0 of a word …

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## [Switch to Filter Messages followed by Join](https://discourse.nodered.org/t/switch-to-filter-messages-followed-by-join/58465)

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**Author:** [@lorccan](https://discourse.nodered.org/u/lorccan)\
**Replies:** 4\
**Last updated:** [16 February 2022 14:46 UTC](https://discourse.nodered.org/t/switch-to-filter-messages-followed-by-join/58465 "2022-02-16T14:46:31Z")

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Two nodes "A" and "B" emit payload.MotionDetected with a value of either 1 or 0 and a Function node adds a timestamp, payload.Time, with Date.now() and a Change node applies a Topic (to differentiate A from B). A Switch…

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## [Variable in HTTP URL](https://discourse.nodered.org/t/variable-in-http-url/58468)

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**Author:** [@Olivia](https://discourse.nodered.org/u/Olivia)\
**Replies:** 7\
**Last updated:** [16 February 2022 14:34 UTC](https://discourse.nodered.org/t/variable-in-http-url/58468 "2022-02-16T14:34:32Z")

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Hello everyone, I am trying to change my URL from the HTTP node with some variables. The range depends on the last two numbers in the URL. I would like to get those values from the date node. can someone help me pleas…

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## [Double question: Installation of NodeRED in MultiInstance and also "to go" on Win10 / Problem stuck loading plugins](https://discourse.nodered.org/t/double-question-installation-of-nodered-in-multiinstance-and-also-to-go-on-win10-problem-stuck-loading-plugins/58459)

<div class="topic-metadata">

**Author:** [@lostbits](https://discourse.nodered.org/u/lostbits)\
**Replies:** 6\
**Last updated:** [16 February 2022 12:47 UTC](https://discourse.nodered.org/t/double-question-installation-of-nodered-in-multiinstance-and-also-to-go-on-win10-problem-stuck-loading-plugins/58459 "2022-02-16T12:47:45Z")

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Hi there, i have some bigger questions, which in fact at the moment I can't find a solution. To describe the situation: I am behind a corp proxy and therefore I'm getting trouble with SSL Certs all the time I need to…

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## [Node-red-contrib-sun-position, blind control](https://discourse.nodered.org/t/node-red-contrib-sun-position-blind-control/58376)

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**Author:** [@DaddelLinux](https://discourse.nodered.org/u/DaddelLinux)\
**Replies:** 3\
**Last updated:** [16 February 2022 12:08 UTC](https://discourse.nodered.org/t/node-red-contrib-sun-position-blind-control/58376 "2022-02-16T12:08:45Z")

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Hi there, I'm trying to automate my shutter control with 'node-red-contrib-sun-position'. The following problem has arisen: before the roller shutters open completely, the slats should first open (20%). This only makes …

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## [Calculator: multiple variable coding question](https://discourse.nodered.org/t/calculator-multiple-variable-coding-question/58422)

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**Author:** [@WBr](https://discourse.nodered.org/u/WBr)\
**Replies:** 13\
**Last updated:** [16 February 2022 10:58 UTC](https://discourse.nodered.org/t/calculator-multiple-variable-coding-question/58422 "2022-02-16T10:58:02Z")

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Could someone help me to explain how one could write a (function node) code with multiple variables that are entered from a text field in the UI? I would like to make a dilution calculator for my student (I am a chemist…

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## [Sharing node-red dashboard](https://discourse.nodered.org/t/sharing-node-red-dashboard/58441)

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**Author:** [@Milanovic](https://discourse.nodered.org/u/Milanovic)\
**Replies:** 1\
**Last updated:** [16 February 2022 09:33 UTC](https://discourse.nodered.org/t/sharing-node-red-dashboard/58441 "2022-02-16T09:33:08Z")

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I made a visualisation with node-red dashboard, but now I want to share it with a mate so he also can see the dashboard. Is this possible? We are on the same network

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## [Execute command](https://discourse.nodered.org/t/execute-command/5122)

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**Author:** [@baudetd](https://discourse.nodered.org/u/baudetd)\
**Replies:** 12\
**Last updated:** [16 February 2022 08:03 UTC](https://discourse.nodered.org/t/execute-command/5122 "2022-02-16T08:03:06Z")

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Hello how to execute a command without using the exec node but in a function ? and recover the value thanks

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## [Float (High/Low word) to a decimal value](https://discourse.nodered.org/t/float-high-low-word-to-a-decimal-value/58439)

<div class="topic-metadata">

**Author:** [@Milanovic](https://discourse.nodered.org/u/Milanovic)\
**Replies:** 1\
**Last updated:** [16 February 2022 08:00 UTC](https://discourse.nodered.org/t/float-high-low-word-to-a-decimal-value/58439 "2022-02-16T08:00:24Z")

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Hi, I read some Modbus registers but I receive a High and Low word. My question is how I can change this to a decimal value.

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## [ESPEASY + NodeRED + MQTT](https://discourse.nodered.org/t/espeasy-nodered-mqtt/58124)

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**Author:** [@Doho](https://discourse.nodered.org/u/Doho)\
**Replies:** 4\
**Last updated:** [16 February 2022 02:02 UTC](https://discourse.nodered.org/t/espeasy-nodered-mqtt/58124 "2022-02-16T02:02:41Z")

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Hi. I am using ESPEASY and NODERED. I want to send the value of DHT22 connected to ESPEASY to NodeRED through Mqtt and check it through the dashboard. First, the value of DHT22 was checked as mqtt through ESPEASY and …

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## [Send payload inside a loop (for)](https://discourse.nodered.org/t/send-payload-inside-a-loop-for/58426)

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**Author:** [@Lafayette](https://discourse.nodered.org/u/Lafayette)\
**Replies:** 2\
**Last updated:** [16 February 2022 01:57 UTC](https://discourse.nodered.org/t/send-payload-inside-a-loop-for/58426 "2022-02-16T01:57:20Z")

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Hi, I have this function (node function / Tab On Message) : const val = msg.payload; let file\_out = {}; for (var i = 0; i \< val.length/4; i++){ file\_out = { 'name' : val\[i + val.length/2\].\_value, …

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## [Tail alternative for windows?](https://discourse.nodered.org/t/tail-alternative-for-windows/58415)

<div class="topic-metadata">

**Author:** [@HaroldPetersInskipp](https://discourse.nodered.org/u/HaroldPetersInskipp)\
**Replies:** 14\
**Last updated:** [16 February 2022 00:15 UTC](https://discourse.nodered.org/t/tail-alternative-for-windows/58415 "2022-02-16T00:15:22Z")

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I mostly run Node-red on Linux machines, but have recently tried to monitor a log file for VLC on Windows with the "Tail" node. However, it seems that "Tail" requires that I close the file in VLC first (seems to be a Win…

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## [Error con palette](https://discourse.nodered.org/t/error-con-palette/58360)

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**Author:** [@JPgravier](https://discourse.nodered.org/u/JPgravier)\
**Replies:** 8\
**Last updated:** [15 February 2022 23:34 UTC](https://discourse.nodered.org/t/error-con-palette/58360 "2022-02-15T23:34:05Z")

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Tengo problemas para descargar librerías en node red, me parece este error. 2022-02-15T05:20:14.400Z npm install --no-audit --no-update-notifier --no-fund --save --save-prefix=~ --production node-red-contrib-buffer-pars…

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## [Shared system folders in multi user instances?](https://discourse.nodered.org/t/shared-system-folders-in-multi-user-instances/57882)

<div class="topic-metadata">

**Author:** [@corso66](https://discourse.nodered.org/u/corso66)\
**Replies:** 33\
**Last updated:** [15 February 2022 22:27 UTC](https://discourse.nodered.org/t/shared-system-folders-in-multi-user-instances/57882 "2022-02-15T22:27:50Z")

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Hello, I tested multi users by running more than one nodered instances in the same machine, same flow for each. I want to know if it is possible to share from the main nodered admin folder, for exemple "node-modules" a…

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## [Add msg.payload to an Payload in a Function Node](https://discourse.nodered.org/t/add-msg-payload-to-an-payload-in-a-function-node/58407)

<div class="topic-metadata">

**Author:** [@Zyan](https://discourse.nodered.org/u/Zyan)\
**Replies:** 2\
**Last updated:** [15 February 2022 21:27 UTC](https://discourse.nodered.org/t/add-msg-payload-to-an-payload-in-a-function-node/58407 "2022-02-15T21:27:01Z")

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Hello Guys i have an Function Node : msg.payload = "export DISPLAY=:0 && /usr/bin/chromium {msg.payload} --start-fullscreen --kiosk" return msg; and at the Point {msg.payload} i wanne add the payload that comes in the…

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## [Delete all characters from the last space](https://discourse.nodered.org/t/delete-all-characters-from-the-last-space/58413)

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**Author:** [@madmax](https://discourse.nodered.org/u/madmax)\
**Replies:** 2\
**Last updated:** [15 February 2022 18:56 UTC](https://discourse.nodered.org/t/delete-all-characters-from-the-last-space/58413 "2022-02-15T18:56:28Z")

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Hi! is it possible to delete all characters from the last space? Here's an example. O ring set IFW140-05 Flywheel Tapered Collet Set IFW143B Shock Boots IFW154 and this is what it should look like when it's done. I…

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## [How can I get the minus summary of two measurements](https://discourse.nodered.org/t/how-can-i-get-the-minus-summary-of-two-measurements/58364)

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**Author:** [@Flixm](https://discourse.nodered.org/u/Flixm)\
**Replies:** 3\
**Last updated:** [15 February 2022 18:24 UTC](https://discourse.nodered.org/t/how-can-i-get-the-minus-summary-of-two-measurements/58364 "2022-02-15T18:24:21Z")

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Hi, I need some help how I can get a negativ summary of two measurements from a photovoltaic and the consumption. I have two different measurements 1st is the power consumption e.g. 400 watts and a second e.g. 700 watt…

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## [Build JSON out of variables](https://discourse.nodered.org/t/build-json-out-of-variables/58400)

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**Author:** [@wuast94](https://discourse.nodered.org/u/wuast94)\
**Replies:** 3\
**Last updated:** [15 February 2022 17:54 UTC](https://discourse.nodered.org/t/build-json-out-of-variables/58400 "2022-02-15T17:54:07Z")

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I try to build Dynamic Notifications, my payload have to look like this: { "extras": { "client::display": { "contentType": "text/markdown" }, "client::notification": { "click": {"ur…

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## [Tooltip: Editing front-end code in the browser and VScode](https://discourse.nodered.org/t/tooltip-editing-front-end-code-in-the-browser-and-vscode/58410)

<div class="topic-metadata">

**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 0\
**Last updated:** [15 February 2022 17:39 UTC](https://discourse.nodered.org/t/tooltip-editing-front-end-code-in-the-browser-and-vscode/58410 "2022-02-15T17:39:58Z")

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Just a quickie for something I discovered today. For those people using the Microsoft Edge browser and VScode. You can turn on an experimental feature that lets you edit code (css, & javascript) IN BROWSER AND in vscode…

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## [Have to recreate ewelink listener after every restart](https://discourse.nodered.org/t/have-to-recreate-ewelink-listener-after-every-restart/58338)

<div class="topic-metadata">

**Author:** [@demokedes](https://discourse.nodered.org/u/demokedes)\
**Replies:** 4\
**Last updated:** [15 February 2022 17:08 UTC](https://discourse.nodered.org/t/have-to-recreate-ewelink-listener-after-every-restart/58338 "2022-02-15T17:08:33Z")

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Listener is not active after restart of the server. I am using ewelink listener a lot. I am receiving all changes from my smart switches in my house. Today I was doing several restarts of node-red and I realized, that …

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