# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=872

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

**Page:** 873

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## [Node-Red sidebar popup windows](https://discourse.nodered.org/t/node-red-sidebar-popup-windows/12638)

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**Author:** [@limengsong](https://discourse.nodered.org/u/limengsong)\
**Replies:** 1\
**Last updated:** [27 June 2019 06:00 UTC](https://discourse.nodered.org/t/node-red-sidebar-popup-windows/12638 "2019-06-27T06:00:38Z")

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Hello, I want to make a pop-up operation by clicking the button in the Node-red Sidebar. Inside the pop-up box is a list (left and right structure), which is a list. What should I do on Node-red, can I refer to it? Tha…

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## [Data from Multiple Arrays to a single Array](https://discourse.nodered.org/t/data-from-multiple-arrays-to-a-single-array/12635)

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**Author:** [@mjbhuyan](https://discourse.nodered.org/u/mjbhuyan)\
**Replies:** 10\
**Last updated:** [26 June 2019 23:22 UTC](https://discourse.nodered.org/t/data-from-multiple-arrays-to-a-single-array/12635 "2019-06-26T23:22:54Z")

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Hi, I'm try to merge data from the multiple arrays into a single array, but I'm unable debug the data. Can someone provide any suggestions. Thank you Regards

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## [How to send a \`null\` from a \`trigger\` node?](https://discourse.nodered.org/t/how-to-send-a-null-from-a-trigger-node/12634)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 4\
**Last updated:** [26 June 2019 22:30 UTC](https://discourse.nodered.org/t/how-to-send-a-null-from-a-trigger-node/12634 "2019-06-26T22:30:21Z")

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I am wanting to inject a message of null to wipe my graphs/gauges. But to make it a bit nicer I first want to send a 0 value to ...... (what ever) and then send the null to have them indicate they were told to turn of…

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## [Is it possible to avoid pop-up nora-google home?](https://discourse.nodered.org/t/is-it-possible-to-avoid-pop-up-nora-google-home/12630)

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**Author:** [@JMas](https://discourse.nodered.org/u/JMas)\
**Replies:** 0\
**Last updated:** [26 June 2019 20:59 UTC](https://discourse.nodered.org/t/is-it-possible-to-avoid-pop-up-nora-google-home/12630 "2019-06-26T20:59:33Z")

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Hello Andrei! First of all congratulate you for your work. I have integrated my automated house with nora-nodered so I can control it with google home as well. The problem I have is that when I visualize my app and …

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## [How create a node ? (two function in a node)](https://discourse.nodered.org/t/how-create-a-node-two-function-in-a-node/12502)

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**Author:** [@gn01868184](https://discourse.nodered.org/u/gn01868184)\
**Replies:** 13\
**Last updated:** [26 June 2019 20:08 UTC](https://discourse.nodered.org/t/how-create-a-node-two-function-in-a-node/12502 "2019-06-26T20:08:35Z")

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How to create a node have two function? for example \>\> the node can at dialog select function1 or function2 Thank~ this is my code computer.js module.exports = function(RED) { function add(config) { RED.…

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## [Extract Specific data from Array](https://discourse.nodered.org/t/extract-specific-data-from-array/12628)

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**Author:** [@mjbhuyan](https://discourse.nodered.org/u/mjbhuyan)\
**Replies:** 5\
**Last updated:** [26 June 2019 19:47 UTC](https://discourse.nodered.org/t/extract-specific-data-from-array/12628 "2019-06-26T19:47:04Z")

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Hi there, I'm try to extract a specific data from a field, but I'm getting the following error. I would greatly appreciate if someone could help me out . Thank you in advance. Kind Regards

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## [Joining weather data from 2 locations](https://discourse.nodered.org/t/joining-weather-data-from-2-locations/12589)

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**Author:** [@Paul-Reed](https://discourse.nodered.org/u/Paul-Reed)\
**Replies:** 12\
**Last updated:** [26 June 2019 19:27 UTC](https://discourse.nodered.org/t/joining-weather-data-from-2-locations/12589 "2019-06-26T19:27:50Z")

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The above flow obtains the current weather conditions from 2 different locations using Darksky. The Parser function nodes parse out the apparent temp & cloud conditions, and this is then joined using a join node. The …

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## [Node RED stop working](https://discourse.nodered.org/t/node-red-stop-working/12625)

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**Author:** [@Raziael](https://discourse.nodered.org/u/Raziael)\
**Replies:** 2\
**Last updated:** [26 June 2019 18:53 UTC](https://discourse.nodered.org/t/node-red-stop-working/12625 "2019-06-26T18:53:33Z")

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Hi everyone, I'm new on this technology, so sorry if it's a stupid question. I and my partner are working for an university project, I made front end and she made back end. In a part of back end, she used node RED, spec…

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## [Node-red split data](https://discourse.nodered.org/t/node-red-split-data/12619)

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**Author:** [@mjbhuyan](https://discourse.nodered.org/u/mjbhuyan)\
**Replies:** 4\
**Last updated:** [26 June 2019 17:33 UTC](https://discourse.nodered.org/t/node-red-split-data/12619 "2019-06-26T17:33:40Z")

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Hi, I want to split the data in "field1" and "field2", but I not very sure how to do it. Someones help will be very much appreciated. Thank you.

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## [Context variable not displayed in sidebar when set to undefined](https://discourse.nodered.org/t/context-variable-not-displayed-in-sidebar-when-set-to-undefined/12622)

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**Author:** [@thatcadguy](https://discourse.nodered.org/u/thatcadguy)\
**Replies:** 4\
**Last updated:** [26 June 2019 17:06 UTC](https://discourse.nodered.org/t/context-variable-not-displayed-in-sidebar-when-set-to-undefined/12622 "2019-06-26T17:06:00Z")

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Hi, I have an inject block hooked up to a function block with "global.set('abc', undefined);", and abc never shows up in the context data sidebar. Is undefined not a valid value to use with context?

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## [Find peaks and falls in data array](https://discourse.nodered.org/t/find-peaks-and-falls-in-data-array/12387)

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**Author:** [@ilkor](https://discourse.nodered.org/u/ilkor)\
**Replies:** 3\
**Last updated:** [26 June 2019 16:24 UTC](https://discourse.nodered.org/t/find-peaks-and-falls-in-data-array/12387 "2019-06-26T16:24:01Z")

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I have a series of data from which I have to find the values / moments in which the ascending sequence goes goes in descending order to determine the peak and vice versa. The data is changed by a sine law, but the peaks …

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## [Node-red stops working](https://discourse.nodered.org/t/node-red-stops-working/12416)

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**Author:** [@trinitry](https://discourse.nodered.org/u/trinitry)\
**Replies:** 14\
**Last updated:** [26 June 2019 08:44 UTC](https://discourse.nodered.org/t/node-red-stops-working/12416 "2019-06-26T08:44:37Z")

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Dear all, i have the bellow configuration... \[info\] Node-RED version: v0.18.4 20 Jun 09:31:46 - \[info\] Node.js version: v6.12.3 20 Jun 09:31:46 - \[info\] Linux 4.4.105-cip15 ia32 LE 20 Jun 09:32:00 - \[info\] Loading …

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## [Smart phone detection using Node-RED](https://discourse.nodered.org/t/smart-phone-detection-using-node-red/12591)

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**Author:** [@ALOKA1432](https://discourse.nodered.org/u/ALOKA1432)\
**Replies:** 13\
**Last updated:** [26 June 2019 08:15 UTC](https://discourse.nodered.org/t/smart-phone-detection-using-node-red/12591 "2019-06-26T08:15:09Z")

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Can we detect a smart phone inside a room using NodeRED with a phone having WI-Fi turned OFF.

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## [Function to add a node](https://discourse.nodered.org/t/function-to-add-a-node/12596)

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**Author:** [@vioman100](https://discourse.nodered.org/u/vioman100)\
**Replies:** 1\
**Last updated:** [26 June 2019 06:06 UTC](https://discourse.nodered.org/t/function-to-add-a-node/12596 "2019-06-26T06:06:17Z")

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I want to create a dashboard that shows me a chart with some temperature sensors, but I want to be able to add new sensors, that means I need to add more mqtt nodes that recives the information from the sensors, so I wan…

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## [Converting \*entire\* msg object to JSON](https://discourse.nodered.org/t/converting-entire-msg-object-to-json/5967)

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**Author:** [@JayDickson](https://discourse.nodered.org/u/JayDickson)\
**Replies:** 2\
**Last updated:** [19 December 2018 17:15 UTC](https://discourse.nodered.org/t/converting-entire-msg-object-to-json/5967 "2018-12-19T17:15:00Z")

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I'm probably overlooking something simple, but how would one go about converting an entire msg object to JSON. In my specific use case, I will be packaging that data into a payload to be sent over a TCP connection betwee…

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## [Node-red-contib-ttn Installing ERROR](https://discourse.nodered.org/t/node-red-contib-ttn-installing-error/9996)

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**Author:** [@Vaccaro](https://discourse.nodered.org/u/Vaccaro)\
**Replies:** 6\
**Last updated:** [26 June 2019 04:21 UTC](https://discourse.nodered.org/t/node-red-contib-ttn-installing-error/9996 "2019-06-26T04:21:14Z")

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Hello, i'm trying to install ttn palette on node red running locally on windows 10. The log error of trying to install is: 2019-04-10T20:22:55.734Z Install : node-red-contrib-ttn 2.0.5 2019-04-10T20:22:56.044Z npm.cmd …

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## [Node-Red SQLITE](https://discourse.nodered.org/t/node-red-sqlite/12583)

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**Author:** [@scargill](https://discourse.nodered.org/u/scargill)\
**Replies:** 6\
**Last updated:** [25 June 2019 22:10 UTC](https://discourse.nodered.org/t/node-red-sqlite/12583 "2019-06-25T22:10:06Z")

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I'm bang up to date with Node-Red on my Pi 3, latest Dashboard, everything updated as expected using the palette mnager, except, not for the first time, SQLITE - problem is its a while since I updated this and I've forgo…

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## [Deploy/ launch a node-red flow with a shortcut on raspberry](https://discourse.nodered.org/t/deploy-launch-a-node-red-flow-with-a-shortcut-on-raspberry/12366)

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**Author:** [@Savoiecraft74](https://discourse.nodered.org/u/Savoiecraft74)\
**Replies:** 8\
**Last updated:** [25 June 2019 21:37 UTC](https://discourse.nodered.org/t/deploy-launch-a-node-red-flow-with-a-shortcut-on-raspberry/12366 "2019-06-25T21:37:25Z")

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Hello guys, I'm in the projet of making a kind of on-board computer for my tractor with a Raspberry pi, the main purpose of this will be to collect data from the baler attached to the tractor. Anyway, is just a matter o…

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## [Serial Port read rfcomm0](https://discourse.nodered.org/t/serial-port-read-rfcomm0/12579)

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**Author:** [@RettSan25](https://discourse.nodered.org/u/RettSan25)\
**Replies:** 2\
**Last updated:** [25 June 2019 18:20 UTC](https://discourse.nodered.org/t/serial-port-read-rfcomm0/12579 "2019-06-25T18:20:08Z")

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Hello Users, That's my first post. I have a problem to read /dev/rfcomm0 via node-red-contrib-serialport. If I send a message I can read them via cat -v \< /dev/rfcomm0 but not with the serial in node. That's show me t…

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## [Feedparser to Reddit issues](https://discourse.nodered.org/t/feedparser-to-reddit-issues/12577)

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**Author:** [@cld.tl](https://discourse.nodered.org/u/cld.tl)\
**Replies:** 5\
**Last updated:** [25 June 2019 14:38 UTC](https://discourse.nodered.org/t/feedparser-to-reddit-issues/12577 "2019-06-25T14:38:58Z")

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Hi there. I just started out with Node Red and it's so amazing. I'm having a little trouble fully understanding it, but I really want to learn how to properly use it. So I started by setting up a feedparser node that au…

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## [Regarding scheduler](https://discourse.nodered.org/t/regarding-scheduler/12571)

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**Author:** [@Ramya](https://discourse.nodered.org/u/Ramya)\
**Replies:** 7\
**Last updated:** [25 June 2019 10:30 UTC](https://discourse.nodered.org/t/regarding-scheduler/12571 "2019-06-25T10:30:22Z")

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Hi guys, I want a scheduler to run every 1 hour, on every day, so which build-in node , i should go , whether i need to use schedex / inject /scheduler/light scheduler ? , how to use these nodes

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## [Non-http transport requested -set by msg.method](https://discourse.nodered.org/t/non-http-transport-requested-set-by-msg-method/12564)

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**Author:** [@gjaan90](https://discourse.nodered.org/u/gjaan90)\
**Replies:** 2\
**Last updated:** [25 June 2019 09:56 UTC](https://discourse.nodered.org/t/non-http-transport-requested-set-by-msg-method/12564 "2019-06-25T09:56:10Z")

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Hi i am new to node-red and trying to execute the http request by 'set by msg.method' Now, I cannot find any resource to get my head around how to inject the string URL. As of now, i have a function right before the ht…

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## [Basic Node-RED Dashboard modifications](https://discourse.nodered.org/t/basic-node-red-dashboard-modifications/12569)

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**Author:** [@Unikumet](https://discourse.nodered.org/u/Unikumet)\
**Replies:** 4\
**Last updated:** [25 June 2019 09:40 UTC](https://discourse.nodered.org/t/basic-node-red-dashboard-modifications/12569 "2019-06-25T09:40:39Z")

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Hi all, I am currently working on a basic UI allowing me to remotely operate several functions. The UI is up and running, but I am searching for guidance on how I can change the layout of the Dashboard. It is currently…

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## [How to pass the API key to Openweathermap node](https://discourse.nodered.org/t/how-to-pass-the-api-key-to-openweathermap-node/12567)

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**Author:** [@mvargasevans](https://discourse.nodered.org/u/mvargasevans)\
**Replies:** 2\
**Last updated:** [25 June 2019 09:00 UTC](https://discourse.nodered.org/t/how-to-pass-the-api-key-to-openweathermap-node/12567 "2019-06-25T09:00:09Z")

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Hello everyone, I've been using Node-Red for a while with great ease. Thanks to the developers! Here's a, probably easy question: What is the best way to pass the API Key to the openweathermap node in a way that it c…

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## [Help controlling water tank level](https://discourse.nodered.org/t/help-controlling-water-tank-level/12155)

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**Author:** [@Jez](https://discourse.nodered.org/u/Jez)\
**Replies:** 23\
**Last updated:** [25 June 2019 06:17 UTC](https://discourse.nodered.org/t/help-controlling-water-tank-level/12155 "2019-06-25T06:17:16Z")

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Hi, Im trying to control the level in a tank with node red on the raspberry pi 3. I have a low and high switch at the bottem and top of the tank and a solenooid to let in water. Im very new to coding and node red so i n…

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## [Credentials File Encryption warnings and IBM + Cloudant](https://discourse.nodered.org/t/credentials-file-encryption-warnings-and-ibm-cloudant/12560)

<div class="topic-metadata">

**Author:** [@PJMcL](https://discourse.nodered.org/u/PJMcL)\
**Replies:** 0\
**Last updated:** [24 June 2019 20:57 UTC](https://discourse.nodered.org/t/credentials-file-encryption-warnings-and-ibm-cloudant/12560 "2019-06-24T20:57:33Z")

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Hi, After some disruption of NodeRED instance, I'm being hampered by the message: Your flow credentials file is encrypted using a system-generated key. If the system-generated key is lost for any reason, your credentia…

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## [Node red tab on dashboard](https://discourse.nodered.org/t/node-red-tab-on-dashboard/12559)

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**Author:** [@khalil](https://discourse.nodered.org/u/khalil)\
**Replies:** 1\
**Last updated:** [24 June 2019 20:08 UTC](https://discourse.nodered.org/t/node-red-tab-on-dashboard/12559 "2019-06-24T20:08:31Z")

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hi everyone is there any way to know wich actual tab we are in node red's dashboard with a code program inside a function node ? i would like to do something like this in a function node : if garden\_tab is pushed do s…

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## [Rss feeds dashboard](https://discourse.nodered.org/t/rss-feeds-dashboard/12557)

<div class="topic-metadata">

**Author:** [@kilbamoo](https://discourse.nodered.org/u/kilbamoo)\
**Replies:** 0\
**Last updated:** [24 June 2019 19:03 UTC](https://discourse.nodered.org/t/rss-feeds-dashboard/12557 "2019-06-24T19:03:27Z")

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I'm trying to show some rss feeds on the dashboard. The feeds are from a news website. The amount of items in the feed can thus change. What I did so far is use the feedparser node then a change node to just get the tit…

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## [Event when config node is selected](https://discourse.nodered.org/t/event-when-config-node-is-selected/12548)

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**Author:** [@has](https://discourse.nodered.org/u/has)\
**Replies:** 0\
**Last updated:** [24 June 2019 13:39 UTC](https://discourse.nodered.org/t/event-when-config-node-is-selected/12548 "2019-06-24T13:39:41Z")

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Hi, I am currently trying to create two nodes that can call different types of API endpoint given an API description with some semantics. (node1 can access all the user data related stuff, and node2 can access some othe…

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## [XML \> 1000 lines](https://discourse.nodered.org/t/xml-1000-lines/12445)

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**Author:** [@JLRDomotique](https://discourse.nodered.org/u/JLRDomotique)\
**Replies:** 9\
**Last updated:** [24 June 2019 13:10 UTC](https://discourse.nodered.org/t/xml-1000-lines/12445 "2019-06-24T13:10:18Z")

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I have a home automation export of 2500 line in Xml. In node-red the import of this file its output in XML is limited in debugging it to the first thousand lines. How can I see the following 1500 lines ???

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