# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=838

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

**Page:** 839

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## [Testing functions required by my node](https://discourse.nodered.org/t/testing-functions-required-by-my-node/16564)

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**Author:** [@serardica](https://discourse.nodered.org/u/serardica)\
**Replies:** 1\
**Last updated:** [11 October 2019 21:26 UTC](https://discourse.nodered.org/t/testing-functions-required-by-my-node/16564 "2019-10-11T21:26:48Z")

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I have a node into a module like below: module.exports = function(RED) { //requires and global vars here var host = RED.settings.host || "localhost"; var request; function myNode(config) { this.request = c…

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## [\`delay\` nodes - suggestion/stuck](https://discourse.nodered.org/t/delay-nodes-suggestion-stuck/16596)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 3\
**Last updated:** [11 October 2019 20:26 UTC](https://discourse.nodered.org/t/delay-nodes-suggestion-stuck/16596 "2019-10-11T20:26:44Z")

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I have a flow and it has a delay node which is set to be variable. Since "Daylight savings" has happened it has kind of done something weird. I can't say for sure, because I messed about with it and it got a bit crazy …

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## [How to run two spawned exec nodes sequential](https://discourse.nodered.org/t/how-to-run-two-spawned-exec-nodes-sequential/16511)

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**Author:** [@pvink](https://discourse.nodered.org/u/pvink)\
**Replies:** 2\
**Last updated:** [11 October 2019 15:20 UTC](https://discourse.nodered.org/t/how-to-run-two-spawned-exec-nodes-sequential/16511 "2019-10-11T15:20:56Z")

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Hello Node-RED forum, I have only just started so please forgive me my 'beginners problems', I am running two commands in exec nodes, they should run sequential (second program uses the output of the first). This works…

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## [Hooking into Node-Red deploy](https://discourse.nodered.org/t/hooking-into-node-red-deploy/16592)

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**Author:** [@Michiel](https://discourse.nodered.org/u/Michiel)\
**Replies:** 2\
**Last updated:** [11 October 2019 15:12 UTC](https://discourse.nodered.org/t/hooking-into-node-red-deploy/16592 "2019-10-11T15:12:23Z")

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Hello, I hope I've got the right cattegory for this. We've got a product where we use Node-Red for programming it. Now the storage of this device is read-only by design. So naturally when I press deploy in Node-Red it…

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## [Node-RED does not load interface](https://discourse.nodered.org/t/node-red-does-not-load-interface/16599)

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**Author:** [@Robbert](https://discourse.nodered.org/u/Robbert)\
**Replies:** 9\
**Last updated:** [11 October 2019 14:29 UTC](https://discourse.nodered.org/t/node-red-does-not-load-interface/16599 "2019-10-11T14:29:56Z")

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Hi all, My node-red stops loading the interface. I run my node-red locally on my mac. everything was working fine and all of a sudden it stop loading the web interface It does not shows any more than this screen. I…

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## [Node Red catch webpage click event](https://discourse.nodered.org/t/node-red-catch-webpage-click-event/16582)

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**Author:** [@briansone](https://discourse.nodered.org/u/briansone)\
**Replies:** 3\
**Last updated:** [11 October 2019 13:21 UTC](https://discourse.nodered.org/t/node-red-catch-webpage-click-event/16582 "2019-10-11T13:21:20Z")

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I have built an IOT interface webpage which has clickable buttons like a window which should open/close when clicked. The hardware side is set up (Pi --\> ESP --\> window actuator controller), & I can send a window open/…

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## [How to install previous version of node-red-contrib-oracledb-mod](https://discourse.nodered.org/t/how-to-install-previous-version-of-node-red-contrib-oracledb-mod/16587)

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**Author:** [@Divya](https://discourse.nodered.org/u/Divya)\
**Replies:** 5\
**Last updated:** [11 October 2019 13:18 UTC](https://discourse.nodered.org/t/how-to-install-previous-version-of-node-red-contrib-oracledb-mod/16587 "2019-10-11T13:18:26Z")

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Hello everyone, I was using the previous version of node-red-contrib-oracledb-mod (v0.5.4). Restarted the node-red and the flows were no more deployed as it contained the older version of node-red-contrib-oracledb-mod a…

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## [Make script for car control](https://discourse.nodered.org/t/make-script-for-car-control/5713)

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**Author:** [@Sin](https://discourse.nodered.org/u/Sin)\
**Replies:** 13\
**Last updated:** [11 October 2019 12:58 UTC](https://discourse.nodered.org/t/make-script-for-car-control/5713 "2019-10-11T12:58:52Z")

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Hello everyone! I'm using Epoc+ headset to control the movement of a robot car. The brain signals will be collected by the headset and send to EmotiBCI application. I trained different mental commands there and I pass th…

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## [Autostart node on deploy](https://discourse.nodered.org/t/autostart-node-on-deploy/16541)

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**Author:** [@francxk](https://discourse.nodered.org/u/francxk)\
**Replies:** 7\
**Last updated:** [11 October 2019 10:47 UTC](https://discourse.nodered.org/t/autostart-node-on-deploy/16541 "2019-10-11T10:47:31Z")

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Hello, is it possible to autostart a function (function node) or when writing a new node sending automatically a message on deploy event ? Is can be an invisible inject feature

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## [Storing partial messages](https://discourse.nodered.org/t/storing-partial-messages/16578)

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**Author:** [@injector22](https://discourse.nodered.org/u/injector22)\
**Replies:** 2\
**Last updated:** [11 October 2019 10:28 UTC](https://discourse.nodered.org/t/storing-partial-messages/16578 "2019-10-11T10:28:16Z")

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I have a flow that receives data via the UDP receiver. The data comes in separate packets one after another, for example: Packet 1 - contains voltage Packet 2 - contains amps Packet 3 - contains temp I want to combin…

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## ["sudo systemctl enable nodered.service" in ubuntu fail?](https://discourse.nodered.org/t/sudo-systemctl-enable-nodered-service-in-ubuntu-fail/16556)

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**Author:** [@gaofei207](https://discourse.nodered.org/u/gaofei207)\
**Replies:** 14\
**Last updated:** [11 October 2019 10:12 UTC](https://discourse.nodered.org/t/sudo-systemctl-enable-nodered-service-in-ubuntu-fail/16556 "2019-10-11T10:12:51Z")

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Hello all , follow the instruction by "https://nodered.org/docs/getting-started/raspberrypi". I have run: bash \<(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodere…

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## [Non continuous Modbus adresses](https://discourse.nodered.org/t/non-continuous-modbus-adresses/16188)

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**Author:** [@jlb](https://discourse.nodered.org/u/jlb)\
**Replies:** 5\
**Last updated:** [11 October 2019 08:52 UTC](https://discourse.nodered.org/t/non-continuous-modbus-adresses/16188 "2019-10-11T08:52:53Z")

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Hello, How can i send a request for non-continuous modbus adresses with the different modbus nodes (reading only) ? For example i want to read the following adresses, in one connection: 1400, 1405, 1412. and not the rang…

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## [Node-red says disconnected but publish still works](https://discourse.nodered.org/t/node-red-says-disconnected-but-publish-still-works/16585)

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**Author:** [@esalles](https://discourse.nodered.org/u/esalles)\
**Replies:** 5\
**Last updated:** [11 October 2019 07:37 UTC](https://discourse.nodered.org/t/node-red-says-disconnected-but-publish-still-works/16585 "2019-10-11T07:37:17Z")

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Guy, I launch 2 instances of Node-Red (on Debian 9 virtual machine) by systemctl services (different home directory and settings file). But when I browse hte admin pages, I have a message "Connection lost to the server…

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## [Accessing file on disk - Incorrect permissions](https://discourse.nodered.org/t/accessing-file-on-disk-incorrect-permissions/16572)

<div class="topic-metadata">

**Author:** [@pviljoen](https://discourse.nodered.org/u/pviljoen)\
**Replies:** 28\
**Last updated:** [10 October 2019 21:15 UTC](https://discourse.nodered.org/t/accessing-file-on-disk-incorrect-permissions/16572 "2019-10-10T21:15:11Z")

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I need to access a file on desk to create a demo. No Luck. here is what I have done. Uninstalled and re-installed. Solved other problems accept the file access isse. Rechecked the file for the correct permissions. Gran…

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## [Functionnode - extract specific payload data](https://discourse.nodered.org/t/functionnode-extract-specific-payload-data/16559)

<div class="topic-metadata">

**Author:** [@Minifugi](https://discourse.nodered.org/u/Minifugi)\
**Replies:** 8\
**Last updated:** [10 October 2019 19:34 UTC](https://discourse.nodered.org/t/functionnode-extract-specific-payload-data/16559 "2019-10-10T19:34:55Z")

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Hi! Currently trying to wrap my head around node-red and some JS. Using the code below I'm able to extract data from my payload.RFID and payload.Key however, if none of these payloads exist they both return as "undefi…

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## [Setting up https](https://discourse.nodered.org/t/setting-up-https/16522)

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**Author:** [@Andres](https://discourse.nodered.org/u/Andres)\
**Replies:** 1\
**Last updated:** [10 October 2019 19:01 UTC](https://discourse.nodered.org/t/setting-up-https/16522 "2019-10-10T19:01:11Z")

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Hello everyone! so i found a code that enables browser notifications, but, since i'm not in the pc host of the node-red, it needs a https certification (apparently). So i'm in the search of some guidance to achieve this …

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## [Bitwise XOR on ASCII string](https://discourse.nodered.org/t/bitwise-xor-on-ascii-string/16552)

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**Author:** [@NTC](https://discourse.nodered.org/u/NTC)\
**Replies:** 2\
**Last updated:** [10 October 2019 19:01 UTC](https://discourse.nodered.org/t/bitwise-xor-on-ascii-string/16552 "2019-10-10T19:01:07Z")

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Hey everyone, I am currently trying to do a simple bitwise XOR on a msg.payload (ASCII string) coming from a serial port. I tried to approach it like I would C programming, but no cigar. Is this even possible in the fun…

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## [Bug Report: INJECT Boolean cannot be set to 'false'](https://discourse.nodered.org/t/bug-report-inject-boolean-cannot-be-set-to-false/16568)

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**Author:** [@tree-frog](https://discourse.nodered.org/u/tree-frog)\
**Replies:** 2\
**Last updated:** [10 October 2019 17:55 UTC](https://discourse.nodered.org/t/bug-report-inject-boolean-cannot-be-set-to-false/16568 "2019-10-10T17:55:37Z")

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I was testing the "node-red-contrib-boolean-logic-ultimate" and it requires a boolean input. I set up an inject to set the msg.payload to boolean true, then another with false. I cannot get the node to stay with the s…

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## [Dashboard Form -\> python3-function node](https://discourse.nodered.org/t/dashboard-form-python3-function-node/12618)

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**Author:** [@maku12](https://discourse.nodered.org/u/maku12)\
**Replies:** 18\
**Last updated:** [10 October 2019 17:49 UTC](https://discourse.nodered.org/t/dashboard-form-python3-function-node/12618 "2019-10-10T17:49:26Z")

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Hi, I created a Dashboard (form node) with 2 elements , and I want to transfer the variables to a python3 function node. Please can you adivse how to do this? Many Thanks Kind Regards Marc

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## [Payload object with "-" in the name does not work](https://discourse.nodered.org/t/payload-object-with-in-the-name-does-not-work/16560)

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**Author:** [@Hubertus](https://discourse.nodered.org/u/Hubertus)\
**Replies:** 2\
**Last updated:** [10 October 2019 15:57 UTC](https://discourse.nodered.org/t/payload-object-with-in-the-name-does-not-work/16560 "2019-10-10T15:57:18Z")

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Hi all, when i retrive the wps status from a Fritz!Box i get the payload: {"NewX\_AVM-DE\_WPSMode":"stop","NewX\_AVM-DE\_WPSStatus":"err\_timeout"} to display the values i have split node: var Mode = {payload: msg.payloa…

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## [Im started today to node-red](https://discourse.nodered.org/t/im-started-today-to-node-red/16546)

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**Author:** [@zeromyname](https://discourse.nodered.org/u/zeromyname)\
**Replies:** 1\
**Last updated:** [10 October 2019 12:36 UTC](https://discourse.nodered.org/t/im-started-today-to-node-red/16546 "2019-10-10T12:36:20Z")

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Hello everyone. I Just started to day to node-red. And im a so curious about that. Im going to learn from them but i cant do anything for now. Im just looking for a 1-9 additon project. can someone help me about that ?

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## [Create message from variable?](https://discourse.nodered.org/t/create-message-from-variable/16547)

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**Author:** [@softy2k](https://discourse.nodered.org/u/softy2k)\
**Replies:** 4\
**Last updated:** [10 October 2019 12:14 UTC](https://discourse.nodered.org/t/create-message-from-variable/16547 "2019-10-10T12:14:18Z")

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Hello Is possible to generate a msg from a variable ? Suppose I need a msg , like msg.Out. But, "Out" comes from the variable. var x = "Out"; var value = "abc"; (function or something else) =\> msg.Out = value;

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## [How to manually install a node into the library](https://discourse.nodered.org/t/how-to-manually-install-a-node-into-the-library/16537)

<div class="topic-metadata">

**Author:** [@bracketmounts](https://discourse.nodered.org/u/bracketmounts)\
**Replies:** 2\
**Last updated:** [10 October 2019 10:56 UTC](https://discourse.nodered.org/t/how-to-manually-install-a-node-into-the-library/16537 "2019-10-10T10:56:10Z")

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Hi guys, I am quite new to all of this and I have been stuck for some time on getting a flow going. I have the flow and manually added 6 of the 7 flows required from the pallette. I get an error " Flows stopped due to m…

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## [Newbie fails with json formula](https://discourse.nodered.org/t/newbie-fails-with-json-formula/16539)

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**Author:** [@soerenh](https://discourse.nodered.org/u/soerenh)\
**Replies:** 2\
**Last updated:** [10 October 2019 11:06 UTC](https://discourse.nodered.org/t/newbie-fails-with-json-formula/16539 "2019-10-10T11:06:48Z")

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Hello, i've just started with nodered and set up the first routines, flows etc. But i have some problems with controlling my lamps. I use IKEAs Tradfri lamps, which want their brightness value as JSON like {"brightness…

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## [Exhibition control project](https://discourse.nodered.org/t/exhibition-control-project/16512)

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**Author:** [@mindthegap](https://discourse.nodered.org/u/mindthegap)\
**Replies:** 8\
**Last updated:** [10 October 2019 09:56 UTC](https://discourse.nodered.org/t/exhibition-control-project/16512 "2019-10-10T09:56:41Z")

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I'm looking for a way to implement a small exhibition control with Node-RED. Main functions are WOL and shutdown of some PCs and their Alive state via UDP or ping. a HTML floor plan would be nice How can i implent a cr…

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## [Take care while working with VS Code](https://discourse.nodered.org/t/take-care-while-working-with-vs-code/16466)

<div class="topic-metadata">

**Author:** [@SeRiusRod](https://discourse.nodered.org/u/SeRiusRod)\
**Replies:** 23\
**Last updated:** [10 October 2019 06:52 UTC](https://discourse.nodered.org/t/take-care-while-working-with-vs-code/16466 "2019-10-10T06:52:05Z")

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While it seems a little offtopic, I wanted to post a warning here to alert anyone that uses Visual Studio Code on their developments. It happened to me something that I never expected nowadays: I lost all the work done i…

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## [Trigger a flow when ontouch screen](https://discourse.nodered.org/t/trigger-a-flow-when-ontouch-screen/16527)

<div class="topic-metadata">

**Author:** [@anguslou](https://discourse.nodered.org/u/anguslou)\
**Replies:** 1\
**Last updated:** [10 October 2019 06:07 UTC](https://discourse.nodered.org/t/trigger-a-flow-when-ontouch-screen/16527 "2019-10-10T06:07:20Z")

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Hi all, I have a node-red flow running on a touch screen. And I want to run the flow when a finger is touched on anywhere on touch screen, can't find any node doing this. Would someone help? Angus

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## [Import library to Python3 function node](https://discourse.nodered.org/t/import-library-to-python3-function-node/16528)

<div class="topic-metadata">

**Author:** [@anguslou](https://discourse.nodered.org/u/anguslou)\
**Replies:** 1\
**Last updated:** [10 October 2019 05:32 UTC](https://discourse.nodered.org/t/import-library-to-python3-function-node/16528 "2019-10-10T05:32:46Z")

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Hi, I have a python3 function node that needs to import python library like pytorch, I tried but seems cannot import library just like other python compilers. Any idea? Angus

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## [Get txt file in a URL directory and send to mysql DB](https://discourse.nodered.org/t/get-txt-file-in-a-url-directory-and-send-to-mysql-db/16525)

<div class="topic-metadata">

**Author:** [@federicobalm](https://discourse.nodered.org/u/federicobalm)\
**Replies:** 1\
**Last updated:** [9 October 2019 23:30 UTC](https://discourse.nodered.org/t/get-txt-file-in-a-url-directory-and-send-to-mysql-db/16525 "2019-10-09T23:30:20Z")

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Hello, I write from Argentina and I clarify that my English is quite bad, sorry for that. Let's go to the important thing! ... in this web directory http://ionos.ingv.it/Tucuman/data/ every 20 minutes a new text file (.…

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## [Problem after upgrading Node-RED to 1.0.1](https://discourse.nodered.org/t/problem-after-upgrading-node-red-to-1-0-1/16514)

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**Author:** [@LucLN](https://discourse.nodered.org/u/LucLN)\
**Replies:** 2\
**Last updated:** [9 October 2019 21:17 UTC](https://discourse.nodered.org/t/problem-after-upgrading-node-red-to-1-0-1/16514 "2019-10-09T21:17:21Z")

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.. just updated a freshly installed Raspberry Pi with Buster to the latest version of Node-RED as described under https://nodered.org/docs/getting-started/raspberrypi .. Is there any reason why nodes installed via "mana…

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