# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=839

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

**Page:** 840

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## [External variables in Range node](https://discourse.nodered.org/t/external-variables-in-range-node/16515)

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**Author:** [@iungo](https://discourse.nodered.org/u/iungo)\
**Replies:** 3\
**Last updated:** [9 October 2019 19:21 UTC](https://discourse.nodered.org/t/external-variables-in-range-node/16515 "2019-10-09T19:21:59Z")

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Is it possible to use external variables in the Range node?

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## [Problem with hue magic =\> hue switch =\> no payload](https://discourse.nodered.org/t/problem-with-hue-magic-hue-switch-no-payload/16306)

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**Author:** [@123dabei](https://discourse.nodered.org/u/123dabei)\
**Replies:** 3\
**Last updated:** [9 October 2019 17:50 UTC](https://discourse.nodered.org/t/problem-with-hue-magic-hue-switch-no-payload/16306 "2019-10-09T17:50:55Z")

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I am using a HueSwitch-Node in hue magic. The switch itself is configured and functioning within the hue bridge. The switch can turn lights on and off. Now, I want to use the switch in Node-red. BUT the switch node doe…

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## [Issue on my node red on raspberry](https://discourse.nodered.org/t/issue-on-my-node-red-on-raspberry/16510)

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**Author:** [@christopheblain](https://discourse.nodered.org/u/christopheblain)\
**Replies:** 6\
**Last updated:** [9 October 2019 17:42 UTC](https://discourse.nodered.org/t/issue-on-my-node-red-on-raspberry/16510 "2019-10-09T17:42:04Z")

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dear all, since 2 days, I have an issue with my not red, all was working fine before but now I fixed to an issue and I need your help :stuck\_out\_tongue: In copy the log and error I have: To find more nodes and example…

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## [Homekit relay to foutain and light bulb](https://discourse.nodered.org/t/homekit-relay-to-foutain-and-light-bulb/15890)

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**Author:** [@Eervi](https://discourse.nodered.org/u/Eervi)\
**Replies:** 16\
**Last updated:** [9 October 2019 15:21 UTC](https://discourse.nodered.org/t/homekit-relay-to-foutain-and-light-bulb/15890 "2019-10-09T15:21:06Z")

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Hej All you :slight\_smile: What I have: Raspi3 2 x 2relays Camera Speaker, Microphone and USB-soundcard 3 x waterpump 1 x LED-light bulp DHT22 sensor ( tempereture and humidity Using Homekit and SIRI Everything is …

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## [Embed dashboard in the editor](https://discourse.nodered.org/t/embed-dashboard-in-the-editor/16308)

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**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 7\
**Last updated:** [9 October 2019 15:17 UTC](https://discourse.nodered.org/t/embed-dashboard-in-the-editor/16308 "2019-10-09T15:17:41Z")

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Is it possible to have a node that displays the dashboard in the editor .....runs away quickly and hides :slight\_smile: I currently use a Windows app called Deskpins so that I can use the dashboard and watch what's hap…

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## [Node-google update calendar event](https://discourse.nodered.org/t/node-google-update-calendar-event/4691)

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**Author:** [@lukasli](https://discourse.nodered.org/u/lukasli)\
**Replies:** 4\
**Last updated:** [9 October 2019 11:43 UTC](https://discourse.nodered.org/t/node-google-update-calendar-event/4691 "2019-10-09T11:43:21Z")

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Hi there, I was wondering if someone is experienced with updating google calendar events with the node-google? I am able to create events with the following function: msg.payload = { 'colorId': 3, 'summary': 'summary…

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## [Calculations within node-red](https://discourse.nodered.org/t/calculations-within-node-red/16505)

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**Author:** [@vinisz](https://discourse.nodered.org/u/vinisz)\
**Replies:** 1\
**Last updated:** [9 October 2019 11:39 UTC](https://discourse.nodered.org/t/calculations-within-node-red/16505 "2019-10-09T11:39:07Z")

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Hi All, quite new here, so don't blame me posting in wrong category. I need node-red to do a specific calculation, how should I do that and is the function node my best option here ? The calculation is newpayload = 1…

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## [Can 't install node-red-contrib-audio 1.0.2](https://discourse.nodered.org/t/can-t-install-node-red-contrib-audio-1-0-2/16502)

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**Author:** [@maku12](https://discourse.nodered.org/u/maku12)\
**Replies:** 2\
**Last updated:** [9 October 2019 11:31 UTC](https://discourse.nodered.org/t/can-t-install-node-red-contrib-audio-1-0-2/16502 "2019-10-09T11:31:44Z")

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Hi, i want to install on a fresh raspbian buster installation with node red the following audio node: i got following error log: Please advise: 2019-10-09T10:55:30.909Z installieren : node-red-contrib-audio 1.0.2 2…

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## [Docker npm install + persistence](https://discourse.nodered.org/t/docker-npm-install-persistence/16496)

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**Author:** [@ssahlender](https://discourse.nodered.org/u/ssahlender)\
**Replies:** 3\
**Last updated:** [9 October 2019 10:45 UTC](https://discourse.nodered.org/t/docker-npm-install-persistence/16496 "2019-10-09T10:45:23Z")

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Hi Together, I have some question about docker and it's persistence especially for packages I installed with npm install. After reading the documentation several times I wanted to ask if I understand it correctly. Yo…

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## [Ideas for a "database-like" structure in global context](https://discourse.nodered.org/t/ideas-for-a-database-like-structure-in-global-context/16358)

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**Author:** [@hazymat](https://discourse.nodered.org/u/hazymat)\
**Replies:** 14\
**Last updated:** [8 October 2019 21:46 UTC](https://discourse.nodered.org/t/ideas-for-a-database-like-structure-in-global-context/16358 "2019-10-08T21:46:21Z")

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Hi all I'm looking for some critique of my implementation of lighting control in NR. For a while I've just set up dashboards with static controls for each light, but I'd like to move towards a dynamic configuration. So…

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## [RPz(W) wlan down detection - help](https://discourse.nodered.org/t/rpz-w-wlan-down-detection-help/16460)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 30\
**Last updated:** [8 October 2019 19:47 UTC](https://discourse.nodered.org/t/rpz-w-wlan-down-detection-help/16460 "2019-10-08T19:47:29Z")

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I have this problem where I have a RPz(W) and now and then the wlan0 interface goes down. I don't know if it is because the WAP goes down - which I hope it isn't happening - or something on the RPI is stopping the inter…

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## [Help Parsing HTTP payload information](https://discourse.nodered.org/t/help-parsing-http-payload-information/16436)

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**Author:** [@Exit2Studios](https://discourse.nodered.org/u/Exit2Studios)\
**Replies:** 11\
**Last updated:** [8 October 2019 18:55 UTC](https://discourse.nodered.org/t/help-parsing-http-payload-information/16436 "2019-10-08T18:55:36Z")

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I'm using an HTTP API (OctoPrint Enclosure plugin for those that care) that returns the following payload: payload: "\[{"status": false, "index\_id": 3}, {"status": false, "index\_id": 4}, {"status": false, "index\_id": 5},…

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## [After upgrade error message](https://discourse.nodered.org/t/after-upgrade-error-message/16478)

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**Author:** [@menno](https://discourse.nodered.org/u/menno)\
**Replies:** 4\
**Last updated:** [8 October 2019 18:18 UTC](https://discourse.nodered.org/t/after-upgrade-error-message/16478 "2019-10-08T18:18:01Z")

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Hi guys after upgrading i still have the RED error on top of my page Using an unsupported version of Node.js You should upgrade to the latest Node.js LTS release can you guys please help me with this i googled and g…

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## [Compare two HTTP GET Requests](https://discourse.nodered.org/t/compare-two-http-get-requests/16469)

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**Author:** [@ebnerjoh](https://discourse.nodered.org/u/ebnerjoh)\
**Replies:** 2\
**Last updated:** [8 October 2019 15:34 UTC](https://discourse.nodered.org/t/compare-two-http-get-requests/16469 "2019-10-08T15:34:06Z")

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Dear all, I have a special project, where I want to use the output of two different HTTP GET Requests as Input for an automation. I am querying two different IP Systems with HTTP Get. One System I am querying every mi…

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## [Storing data in flow without using flow.set (array of objects)](https://discourse.nodered.org/t/storing-data-in-flow-without-using-flow-set-array-of-objects/16461)

<div class="topic-metadata">

**Author:** [@homeplayer](https://discourse.nodered.org/u/homeplayer)\
**Replies:** 6\
**Last updated:** [8 October 2019 12:23 UTC](https://discourse.nodered.org/t/storing-data-in-flow-without-using-flow-set-array-of-objects/16461 "2019-10-08T12:23:58Z")

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I am a noob when it comes to programming, See me as a Frankenstein coder. The data stored in flow data = \[ {"ps":"previous state","type":"1","hold":"0","count":0,"name":"name","resrv":0}, {"ps":false,"type":0,"hold":0,…

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## [HTTP request node not following 302 redirect](https://discourse.nodered.org/t/http-request-node-not-following-302-redirect/16409)

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**Author:** [@M-F-K](https://discourse.nodered.org/u/M-F-K)\
**Replies:** 5\
**Last updated:** [8 October 2019 11:07 UTC](https://discourse.nodered.org/t/http-request-node-not-following-302-redirect/16409 "2019-10-08T11:07:31Z")

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Hi, Im a newbie to node-red and this forum, so if anything in this post sounds stupid or the post itself placed wrong, im sorry for wasting your time. annyway my problem: Im trying to to a post redirect to gain wunder…

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## [Cannot install node-red-contrib-gpio](https://discourse.nodered.org/t/cannot-install-node-red-contrib-gpio/16397)

<div class="topic-metadata">

**Author:** [@shj-123558](https://discourse.nodered.org/u/shj-123558)\
**Replies:** 12\
**Last updated:** [8 October 2019 10:59 UTC](https://discourse.nodered.org/t/cannot-install-node-red-contrib-gpio/16397 "2019-10-08T10:59:42Z")

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A lot of errors,what's to be done?Thank you 2019-10-07T01:06:38.134Z 安装 : node-red-contrib-gpio 0.14.0 2019-10-07T01:07:18.767Z \[out\] 2019-10-07T01:07:18.767Z \[out\] \> serialport@6.0.5 install C:\\Users\\Administrator.no…

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## [Node-red-contrib-amazon-echo and running NR in root at bootup](https://discourse.nodered.org/t/node-red-contrib-amazon-echo-and-running-nr-in-root-at-bootup/16442)

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**Author:** [@kenkoknz](https://discourse.nodered.org/u/kenkoknz)\
**Replies:** 5\
**Last updated:** [8 October 2019 09:21 UTC](https://discourse.nodered.org/t/node-red-contrib-amazon-echo-and-running-nr-in-root-at-bootup/16442 "2019-10-08T09:21:32Z")

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System: NR: v20.5 HW: pi3b+ Use: Home automation; Alexa, Broadlink, Wemo, Environ monitor Problem: node-red-contrib-alexa-local no longer works What to achieve: Restore use of Alexa functions with minimal disruption…

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## [My journey into the bluetooth world](https://discourse.nodered.org/t/my-journey-into-the-bluetooth-world/16457)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 2\
**Last updated:** [8 October 2019 09:15 UTC](https://discourse.nodered.org/t/my-journey-into-the-bluetooth-world/16457 "2019-10-08T09:15:38Z")

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I just realised that there is no native Bluetooth node in NR. I have not really played with Bluetooth in the past, but as things go on. I've done a search but I don't know/understand which node I want/need. I get that…

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## [Problems with updating to Node-Red v1.0.1](https://discourse.nodered.org/t/problems-with-updating-to-node-red-v1-0-1/16453)

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**Author:** [@Piyush](https://discourse.nodered.org/u/Piyush)\
**Replies:** 8\
**Last updated:** [8 October 2019 08:56 UTC](https://discourse.nodered.org/t/problems-with-updating-to-node-red-v1-0-1/16453 "2019-10-08T08:56:55Z")

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Hello, I recently updated my node red version from 0.7.X to 1.0.1. I could see some problems with the OPCUA IIOT Inject contrib. I could not find the place to enter the data like name, node id etc. The help says that t…

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## [My node-red-contrib-gpio cannot be install ,please help me,thank you very much](https://discourse.nodered.org/t/my-node-red-contrib-gpio-cannot-be-install-please-help-me-thank-you-very-much/16450)

<div class="topic-metadata">

**Author:** [@shj-123558](https://discourse.nodered.org/u/shj-123558)\
**Replies:** 1\
**Last updated:** [8 October 2019 07:47 UTC](https://discourse.nodered.org/t/my-node-red-contrib-gpio-cannot-be-install-please-help-me-thank-you-very-much/16450 "2019-10-08T07:47:12Z")

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019-10-08T07:23:14.638Z 安装 : node-red-contrib-gpio 0.14.0 2019-10-08T07:23:14.673Z npm.cmd install --no-audit --no-update-notifier --save --save-prefix="~" --production node-red-contrib-gpio@0.14.0 2019-10-08T07:23:44.…

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## [Help - New to node red](https://discourse.nodered.org/t/help-new-to-node-red/16447)

<div class="topic-metadata">

**Author:** [@Nka292](https://discourse.nodered.org/u/Nka292)\
**Replies:** 2\
**Last updated:** [8 October 2019 05:45 UTC](https://discourse.nodered.org/t/help-new-to-node-red/16447 "2019-10-08T05:45:42Z")

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Hi I have a neuro headset from emotiv(emotiv insight) which I want to use to control the actions of a raspberry pi robot car. I am completely new to node red and dont really have a great background in coding. It'd be gre…

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## [EmotivBCI Node-RED Toolbox](https://discourse.nodered.org/t/emotivbci-node-red-toolbox/5653)

<div class="topic-metadata">

**Author:** [@Sin](https://discourse.nodered.org/u/Sin)\
**Replies:** 1\
**Last updated:** [8 October 2019 03:21 UTC](https://discourse.nodered.org/t/emotivbci-node-red-toolbox/5653 "2019-10-08T03:21:42Z")

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Hi everyone! Is anyone using node-red toolbox and EmotivBCI to train the mental command for any EEG project? Just wondering how to pass the training data of the mental commands to the Arduino.

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## [How can i run a nodejs server on a node-red flow](https://discourse.nodered.org/t/how-can-i-run-a-nodejs-server-on-a-node-red-flow/16433)

<div class="topic-metadata">

**Author:** [@mittameijer](https://discourse.nodered.org/u/mittameijer)\
**Replies:** 2\
**Last updated:** [7 October 2019 23:21 UTC](https://discourse.nodered.org/t/how-can-i-run-a-nodejs-server-on-a-node-red-flow/16433 "2019-10-07T23:21:48Z")

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I have made a discord bot in nodejs. now i have the question how can i run it from node-red?

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## [Button send permanent 1](https://discourse.nodered.org/t/button-send-permanent-1/16064)

<div class="topic-metadata">

**Author:** [@Mario](https://discourse.nodered.org/u/Mario)\
**Replies:** 5\
**Last updated:** [7 October 2019 20:51 UTC](https://discourse.nodered.org/t/button-send-permanent-1/16064 "2019-10-07T20:51:50Z")

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Hello I would like to send my button as soon as I let him number 0 again. at the moment it is so that he sends a 1 via modbus when clicking and then it stays that way. but I need to release again a 0.

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## [Do Inject Nodes use much bandwidth](https://discourse.nodered.org/t/do-inject-nodes-use-much-bandwidth/16440)

<div class="topic-metadata">

**Author:** [@Exit2Studios](https://discourse.nodered.org/u/Exit2Studios)\
**Replies:** 4\
**Last updated:** [7 October 2019 19:45 UTC](https://discourse.nodered.org/t/do-inject-nodes-use-much-bandwidth/16440 "2019-10-07T19:45:06Z")

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Is it bad practice to utilize a bunch of inject nodes to do queries, html calls, etc on a regular interval? At what point does this start creating issues and performance degradation? Are multiple calls every 15 seconds…

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## [Can I use c++ in node red?](https://discourse.nodered.org/t/can-i-use-c-in-node-red/16368)

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**Author:** [@16KYJ](https://discourse.nodered.org/u/16KYJ)\
**Replies:** 13\
**Last updated:** [7 October 2019 16:01 UTC](https://discourse.nodered.org/t/can-i-use-c-in-node-red/16368 "2019-10-07T16:01:05Z")

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I am a beginner of node-red and I want to use c++ language in node red. I found that I can use c++ code as modules in node.js project by c++ addon but I don't know how to utilize it with node red. I searched online an…

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## [Confused about MQTT \> InfluxDB](https://discourse.nodered.org/t/confused-about-mqtt-influxdb/16365)

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**Author:** [@clickworkorange](https://discourse.nodered.org/u/clickworkorange)\
**Replies:** 26\
**Last updated:** [7 October 2019 15:59 UTC](https://discourse.nodered.org/t/confused-about-mqtt-influxdb/16365 "2019-10-07T15:59:36Z")

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I'm new to InfluxDB, but it seems to me there's a bit of a conflict between Node-RED/MQTT's messaging structure and InfluxDB's "measurement" concept in that the former wants to be atomic while the latter expects multiple…

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## [Problem Delete File on Windows](https://discourse.nodered.org/t/problem-delete-file-on-windows/16400)

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**Author:** [@mrizkywiguna](https://discourse.nodered.org/u/mrizkywiguna)\
**Replies:** 14\
**Last updated:** [7 October 2019 15:55 UTC](https://discourse.nodered.org/t/problem-delete-file-on-windows/16400 "2019-10-07T15:55:00Z")

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Hi Guys, I have problem to delete the file that i created with node-red on Windows OS. I need delete the file scheduled to write new file again after deleted. Here is the error message: Error: EPERM: operation not perm…

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## [How to install the latest module version on Windows if plaette just shows the old one](https://discourse.nodered.org/t/how-to-install-the-latest-module-version-on-windows-if-plaette-just-shows-the-old-one/16396)

<div class="topic-metadata">

**Author:** [@GiovanniG](https://discourse.nodered.org/u/GiovanniG)\
**Replies:** 6\
**Last updated:** [7 October 2019 14:15 UTC](https://discourse.nodered.org/t/how-to-install-the-latest-module-version-on-windows-if-plaette-just-shows-the-old-one/16396 "2019-10-07T14:15:47Z")

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Hi, there is a new version of a very powerful module, before installing it on RPi I want to test it on windows, but on the palette I can see only the previous version of 8 months ago. If I type the command npm install n…

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