# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=513

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

**Page:** 514

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## [Create toggle switch](https://discourse.nodered.org/t/create-toggle-switch/9000)

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**Author:** [@aufruf](https://discourse.nodered.org/u/aufruf)\
**Replies:** 6\
**Last updated:** [3 August 2021 07:28 UTC](https://discourse.nodered.org/t/create-toggle-switch/9000 "2021-08-03T07:28:34Z")

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Hi there, I am currently playing around with HomeMatic, NodeRed and some HUE lights. What I would like to implement is a toggle switch so that I can turn a HUE light on and off by pressing the same button. The HomeMAt…

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## [Bundle msg payload outputs](https://discourse.nodered.org/t/bundle-msg-payload-outputs/49240)

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**Author:** [@dp2109](https://discourse.nodered.org/u/dp2109)\
**Replies:** 2\
**Last updated:** [3 August 2021 06:55 UTC](https://discourse.nodered.org/t/bundle-msg-payload-outputs/49240 "2021-08-03T06:55:47Z")

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Good afternoon everyone, I am doing a test to send data to the cloud with aws. I don't see a way to put all those message outputs into one to send it through the mqtt node. If someone knew how I would appreciate it ver…

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## [Microgrid Simulation](https://discourse.nodered.org/t/microgrid-simulation/49243)

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**Author:** [@tyvik0014](https://discourse.nodered.org/u/tyvik0014)\
**Replies:** 3\
**Last updated:** [3 August 2021 06:49 UTC](https://discourse.nodered.org/t/microgrid-simulation/49243 "2021-08-03T06:49:10Z")

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I'm required to design a microgrid simulation on Node Red. I don't have much knowledge about Node Red and am wanted to ask if its possible to design a microgrid simulation on node red. Secondly, most microgrid simulation…

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## [How to use the exec module to issue kubectl commands to control the cluster](https://discourse.nodered.org/t/how-to-use-the-exec-module-to-issue-kubectl-commands-to-control-the-cluster/49189)

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**Author:** [@lei1](https://discourse.nodered.org/u/lei1)\
**Replies:** 8\
**Last updated:** [3 August 2021 04:06 UTC](https://discourse.nodered.org/t/how-to-use-the-exec-module-to-issue-kubectl-commands-to-control-the-cluster/49189 "2021-08-03T04:06:37Z")

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I want to use the exec module in nodered to call kubectl commands outside the system. I have successfully called external docker commands by creating nodered containers with some docker files mounted to the outside, but …

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## [First Post-Drivers/templates?](https://discourse.nodered.org/t/first-post-drivers-templates/49177)

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**Author:** [@gearond](https://discourse.nodered.org/u/gearond)\
**Replies:** 3\
**Last updated:** [3 August 2021 03:26 UTC](https://discourse.nodered.org/t/first-post-drivers-templates/49177 "2021-08-03T03:26:59Z")

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Would like to use this board with a raspberry pi and no red and access it from Hubitat. 1/ Is there a driver for this already( I have sent a message to the vendor no reply yet in the last 1 hour) 2/ how easy is it to…

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## [How can I add two input port in the node I created](https://discourse.nodered.org/t/how-can-i-add-two-input-port-in-the-node-i-created/49214)

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**Author:** [@ma\_23](https://discourse.nodered.org/u/ma_23)\
**Replies:** 9\
**Last updated:** [2 August 2021 21:35 UTC](https://discourse.nodered.org/t/how-can-i-add-two-input-port-in-the-node-i-created/49214 "2021-08-02T21:35:16Z")

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I need to have two input for one node I created .Yet it only allows to have one input . Is there a way to do that ?

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## [Nodered-contrib-signal-client](https://discourse.nodered.org/t/nodered-contrib-signal-client/48009)

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**Author:** [@luku64](https://discourse.nodered.org/u/luku64)\
**Replies:** 2\
**Last updated:** [2 August 2021 19:35 UTC](https://discourse.nodered.org/t/nodered-contrib-signal-client/48009 "2021-08-02T19:35:59Z")

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Hello everyone, I have problems sending signal messages. The registration is ok. The receiving of messages works. But, when sending I get you the following error message: "Signal client error: {"successfulIdentifiers…

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## [HTTP POST payload empty (with code)](https://discourse.nodered.org/t/http-post-payload-empty-with-code/49218)

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**Author:** [@vitorportela](https://discourse.nodered.org/u/vitorportela)\
**Replies:** 4\
**Last updated:** [2 August 2021 18:15 UTC](https://discourse.nodered.org/t/http-post-payload-empty-with-code/49218 "2021-08-02T18:15:46Z")

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Hello My name is Vitor and I'm a newbie :sweat\_smile: Well... I'm trying post an image(base64) but I'm doing something wrong. :persevere: Can anybody help me? :point\_right: :point\_left: PS.: ( Yes, my english is ter…

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## [I want to use Node-Red to emulate the Modbus slave](https://discourse.nodered.org/t/i-want-to-use-node-red-to-emulate-the-modbus-slave/49217)

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**Author:** [@Cybertron](https://discourse.nodered.org/u/Cybertron)\
**Replies:** 5\
**Last updated:** [2 August 2021 15:44 UTC](https://discourse.nodered.org/t/i-want-to-use-node-red-to-emulate-the-modbus-slave/49217 "2021-08-02T15:44:31Z")

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I want to use node-red to simulate the modbus slave. Let me first explain why I have such a strange need. I'm using an Internet of things cloud platform, which uses the standard modbus protocol. I have a lot of devices…

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## [Is it possible to add sub category](https://discourse.nodered.org/t/is-it-possible-to-add-sub-category/49105)

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**Author:** [@ma\_23](https://discourse.nodered.org/u/ma_23)\
**Replies:** 2\
**Last updated:** [2 August 2021 14:35 UTC](https://discourse.nodered.org/t/is-it-possible-to-add-sub-category/49105 "2021-08-02T14:35:23Z")

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In node red there is only category for nodes. I want to know if there is a way to add sub category for nodes

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## [Version control in Projects](https://discourse.nodered.org/t/version-control-in-projects/49213)

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**Author:** [@funhall](https://discourse.nodered.org/u/funhall)\
**Replies:** 1\
**Last updated:** [2 August 2021 13:48 UTC](https://discourse.nodered.org/t/version-control-in-projects/49213 "2021-08-02T13:48:54Z")

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How do I roll back to this version in projects history?

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## [2.0.1 error (networking?)](https://discourse.nodered.org/t/2-0-1-error-networking/48686)

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**Author:** [@GeorgeCastanza](https://discourse.nodered.org/u/GeorgeCastanza)\
**Replies:** 44\
**Last updated:** [2 August 2021 12:48 UTC](https://discourse.nodered.org/t/2-0-1-error-networking/48686 "2021-08-02T12:48:23Z")

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I realise there was an update to this node in the 2.0.0 update. However, my http request node is not working and I'm not sure where to start. I have a number of flows that scrape the web for prices/changes etc. They ar…

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## [Information missing i switch](https://discourse.nodered.org/t/information-missing-i-switch/49201)

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**Author:** [@funhall](https://discourse.nodered.org/u/funhall)\
**Replies:** 11\
**Last updated:** [2 August 2021 12:38 UTC](https://discourse.nodered.org/t/information-missing-i-switch/49201 "2021-08-02T12:38:59Z")

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I have this flow that works fine without the Switch If i set in the switch that sort on msg.topic == Cart01, msg.topic == Cart2, etc. like picture below it wont work. All the message have the topic to Cart01. If y…

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## [How to link Different modbus Energy meters serial data in a single flow](https://discourse.nodered.org/t/how-to-link-different-modbus-energy-meters-serial-data-in-a-single-flow/49174)

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**Author:** [@Energycharges](https://discourse.nodered.org/u/Energycharges)\
**Replies:** 3\
**Last updated:** [2 August 2021 07:52 UTC](https://discourse.nodered.org/t/how-to-link-different-modbus-energy-meters-serial-data-in-a-single-flow/49174 "2021-08-02T07:52:54Z")

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Hi all, Im working on Different modbus Energy meter , how to link different Energy meter Modbus system datas into a single flow. If i put 2 modbus flex getter in single flow of different modbus , either of those are wo…

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## [Running Node-RED on multiple instances but with separate set of flow](https://discourse.nodered.org/t/running-node-red-on-multiple-instances-but-with-separate-set-of-flow/49068)

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**Author:** [@WeeSeong](https://discourse.nodered.org/u/WeeSeong)\
**Replies:** 21\
**Last updated:** [2 August 2021 01:03 UTC](https://discourse.nodered.org/t/running-node-red-on-multiple-instances-but-with-separate-set-of-flow/49068 "2021-08-02T01:03:23Z")

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Hello everyone, sorry that I have to make another post again. So currently I've worked on making a interface where user have to login through dashboard and I've set a default persistent content on my main port. The ques…

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## [Docker watch node not triggering on change](https://discourse.nodered.org/t/docker-watch-node-not-triggering-on-change/49188)

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**Author:** [@peterprib](https://discourse.nodered.org/u/peterprib)\
**Replies:** 0\
**Last updated:** [2 August 2021 05:23 UTC](https://discourse.nodered.org/t/docker-watch-node-not-triggering-on-change/49188 "2021-08-02T05:23:12Z")

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When I set up container in windows docker using wls2 docker run -d -it -p 1880:1880 -v node\_red\_data:/data1 -v ~/:/mnt/myHome -v c:/AppData/dockerShare:/mnt/dockerShare --name mynodered nodered/node-red and use watch w…

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## [MQTT into function cannot read message](https://discourse.nodered.org/t/mqtt-into-function-cannot-read-message/49148)

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**Author:** [@gerry](https://discourse.nodered.org/u/gerry)\
**Replies:** 24\
**Last updated:** [2 August 2021 02:25 UTC](https://discourse.nodered.org/t/mqtt-into-function-cannot-read-message/49148 "2021-08-02T02:25:32Z")

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I have a fairly simple flow where the mqtt node reads into a function. I can see the mqtt output in a debug node and yet when I try to read that value in a function it does not work. It's actually like the function doesn…

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## [Question about "hidden" config nodes](https://discourse.nodered.org/t/question-about-hidden-config-nodes/49173)

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**Author:** [@Gunner](https://discourse.nodered.org/u/Gunner)\
**Replies:** 2\
**Last updated:** [1 August 2021 22:35 UTC](https://discourse.nodered.org/t/question-about-hidden-config-nodes/49173 "2021-08-01T22:35:00Z")

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This is more a curiosity... but apparently I have "unused config" nodes that are hidden in my Node-Red setup. And as of yet, I haven't figured out how to find out what they are. And an additional 2 of them are apparent…

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## [Naming flow with msg.topic or another variable](https://discourse.nodered.org/t/naming-flow-with-msg-topic-or-another-variable/49171)

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**Author:** [@funhall](https://discourse.nodered.org/u/funhall)\
**Replies:** 9\
**Last updated:** [1 August 2021 21:58 UTC](https://discourse.nodered.org/t/naming-flow-with-msg-topic-or-another-variable/49171 "2021-08-01T21:58:57Z")

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How can I name a flow var. like counter(msg.topic) Or similar to this example. I am absolutly new in this. So please no advanced answer please :slight\_smile:

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## [Node-Red V2 on DietPi - Bash Script not been compliant!](https://discourse.nodered.org/t/node-red-v2-on-dietpi-bash-script-not-been-compliant/49096)

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**Author:** [@nksky](https://discourse.nodered.org/u/nksky)\
**Replies:** 4\
**Last updated:** [1 August 2021 18:02 UTC](https://discourse.nodered.org/t/node-red-v2-on-dietpi-bash-script-not-been-compliant/49096 "2021-08-01T18:02:24Z")

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Upgrading to NR V2 from 1.35 on the latest version of DietPi v7.4.2, npm 7.20.3, Node v16.3.0 Much to my delight, NodeRed documentation comments the bash script will run on DietPi, which gives alot more functionality th…

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## [Help Wanted - testing updated install script](https://discourse.nodered.org/t/help-wanted-testing-updated-install-script/45685)

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**Author:** [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Replies:** 84\
**Last updated:** [1 August 2021 17:55 UTC](https://discourse.nodered.org/t/help-wanted-testing-updated-install-script/45685 "2021-08-01T17:55:31Z")

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Hi all, if anyone would like to help test the latest version of the Pi/Debian install script then I would be most grateful for some extra testing... Of course it should work fine... but the whole point is to find out wh…

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## [Worldmap Image Overlay from local File](https://discourse.nodered.org/t/worldmap-image-overlay-from-local-file/49157)

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**Author:** [@Koloblix](https://discourse.nodered.org/u/Koloblix)\
**Replies:** 2\
**Last updated:** [1 August 2021 17:44 UTC](https://discourse.nodered.org/t/worldmap-image-overlay-from-local-file/49157 "2021-08-01T17:44:44Z")

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Hi, I want to use an image overlay for Worldmap. Is it possible to use an local file in? In the discription is only an url to an webadress: var imageBounds = \[\[40.712216, -74.22655\], \[40.773941, -74.12544\]\]; msg.paylo…

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## [Dynamically create charts / front end elements with Ui-Builder based on size of array?](https://discourse.nodered.org/t/dynamically-create-charts-front-end-elements-with-ui-builder-based-on-size-of-array/49141)

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**Author:** [@CreativeWarlock](https://discourse.nodered.org/u/CreativeWarlock)\
**Replies:** 19\
**Last updated:** [1 August 2021 13:40 UTC](https://discourse.nodered.org/t/dynamically-create-charts-front-end-elements-with-ui-builder-based-on-size-of-array/49141 "2021-08-01T13:40:14Z")

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Hi guys, so here's a "requirement" I would like to implement with UI-Builder: Imagine in one of your flows you've prepared an array like below and you wanna display that in the frontend. The problem here is that the siz…

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## [Pass several objects in one step to "Advanced Ping"](https://discourse.nodered.org/t/pass-several-objects-in-one-step-to-advanced-ping/49161)

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**Author:** [@Golonder](https://discourse.nodered.org/u/Golonder)\
**Replies:** 2\
**Last updated:** [1 August 2021 12:41 UTC](https://discourse.nodered.org/t/pass-several-objects-in-one-step-to-advanced-ping/49161 "2021-08-01T12:41:28Z")

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Hi, I am using the "advanced ping" node to check if my network hardware is still up and running. this node requires a msg.host value to ping to. I would like to send him a list of msg.host value so that I do not have …

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## [Tuya-Smart-Node configuration - is it working anyway?](https://discourse.nodered.org/t/tuya-smart-node-configuration-is-it-working-anyway/49159)

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**Author:** [@RonMa](https://discourse.nodered.org/u/RonMa)\
**Replies:** 0\
**Last updated:** [1 August 2021 11:42 UTC](https://discourse.nodered.org/t/tuya-smart-node-configuration-is-it-working-anyway/49159 "2021-08-01T11:42:05Z")

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Hi guys, since weeks I´m trying to have my Tuya devices somehow integrated to my Smart Home system. I had big hope when they released the Tuya v2 API but got disappointed quite soon. Now here is what I´m trying to achie…

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## [Help with a pan+tilt flow and arduino ino to add a relay](https://discourse.nodered.org/t/help-with-a-pan-tilt-flow-and-arduino-ino-to-add-a-relay/49146)

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**Author:** [@ronbu](https://discourse.nodered.org/u/ronbu)\
**Replies:** 10\
**Last updated:** [31 July 2021 23:32 UTC](https://discourse.nodered.org/t/help-with-a-pan-tilt-flow-and-arduino-ino-to-add-a-relay/49146 "2021-07-31T23:32:36Z")

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I have gone brain dead...I have a nod-red flow and an arduino iso that I DID NOT WRITE but am trying to add a simple relay to them to switch cameras output to my system. The bad thing is I did it many weeks ago and it al…

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## [BLYNK Disconnection](https://discourse.nodered.org/t/blynk-disconnection/49147)

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**Author:** [@sefaguntepe](https://discourse.nodered.org/u/sefaguntepe)\
**Replies:** 1\
**Last updated:** [31 July 2021 20:37 UTC](https://discourse.nodered.org/t/blynk-disconnection/49147 "2021-07-31T20:37:26Z")

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The "blynk" link is working. But after a certain time the connection drops. Where do you think is the mistake? node-red-contrib-blynk-ws ws://blynk-cloud.com/websockets

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## [Is it okay to promote/advertise products and services related to Node-RED in this forum?](https://discourse.nodered.org/t/is-it-okay-to-promote-advertise-products-and-services-related-to-node-red-in-this-forum/49144)

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**Author:** [@rko](https://discourse.nodered.org/u/rko)\
**Replies:** 4\
**Last updated:** [31 July 2021 19:35 UTC](https://discourse.nodered.org/t/is-it-okay-to-promote-advertise-products-and-services-related-to-node-red-in-this-forum/49144 "2021-07-31T19:35:25Z")

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I haven’t really found many promotional posts in this forum (except in the Events category). Is it allowed? We are not planning to spam the forum :robot:

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## [Question : Information panel in sidebar sorting or ordering](https://discourse.nodered.org/t/question-information-panel-in-sidebar-sorting-or-ordering/49127)

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**Author:** [@tmichaeltx](https://discourse.nodered.org/u/tmichaeltx)\
**Replies:** 11\
**Last updated:** [31 July 2021 18:18 UTC](https://discourse.nodered.org/t/question-information-panel-in-sidebar-sorting-or-ordering/49127 "2021-07-31T18:18:51Z")

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I had a question about organizing my flows in a sensible to me hierarchy and at some point realized that what I wanted is already built in the Information panel of the sidebar. This is great. At the risk of looking the g…

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## [What does % do?](https://discourse.nodered.org/t/what-does-do/49126)

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**Author:** [@dokoral](https://discourse.nodered.org/u/dokoral)\
**Replies:** 3\
**Last updated:** [31 July 2021 17:36 UTC](https://discourse.nodered.org/t/what-does-do/49126 "2021-07-31T17:36:24Z")

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I'm new to this. What does enclosing data with % do? ex: %helloWorld%

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