# Latest

**URL:** https://discourse.nodered.org/latest.md?page=1261

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

**Page:** 1262

---

## [A link-in-out node](https://discourse.nodered.org/t/a-link-in-out-node/12544)

<div class="topic-metadata">

**Author:** [@michaelblight](https://discourse.nodered.org/u/michaelblight)\
**Replies:** 6\
**Last updated:** [28 June 2019 07:17 UTC](https://discourse.nodered.org/t/a-link-in-out-node/12544 "2019-06-28T07:17:58Z")

</div>

It's not uncommon to have nodes connected many-to-many. Visually this is a bit of a mess, so I have created a subflow, which I called X, that just has one input and one output joined together like this... Then I can t…

---

## [this.activeNodes\[id\] returns null](https://discourse.nodered.org/t/this-activenodes-id-returns-null/12641)

<div class="topic-metadata">

**Author:** [@pauldeng](https://discourse.nodered.org/u/pauldeng)\
**Replies:** 1\
**Last updated:** [28 June 2019 05:59 UTC](https://discourse.nodered.org/t/this-activenodes-id-returns-null/12641 "2019-06-28T05:59:11Z")

</div>

Hi all, I am developing my custom node. After I redeploy application via the editor, my node sometimes does not send out the messages as expected. By looking at the code, my custom node calls this.send(msg) and it som…

---

## [Send json tcp request](https://discourse.nodered.org/t/send-json-tcp-request/12653)

<div class="topic-metadata">

**Author:** [@Kayle](https://discourse.nodered.org/u/Kayle)\
**Replies:** 3\
**Last updated:** [28 June 2019 05:49 UTC](https://discourse.nodered.org/t/send-json-tcp-request/12653 "2019-06-28T05:49:08Z")

</div>

Hello all, I'm trying to get data from my 3d printer through tcp port 35. I was able to sniff the packages between my computer and the printer with wireshark, but I was not able to get data with node red. It seems that …

---

## [Multiple instances using Docker](https://discourse.nodered.org/t/multiple-instances-using-docker/12613)

<div class="topic-metadata">

**Author:** [@Stylo](https://discourse.nodered.org/u/Stylo)\
**Replies:** 4\
**Last updated:** [28 June 2019 05:05 UTC](https://discourse.nodered.org/t/multiple-instances-using-docker/12613 "2019-06-28T05:05:00Z")

</div>

Is it possible to have multiple instances of Node-Red running on the same machine/server using docker, and if so is it possible to access each simply through different ports?

---

## [📋 2019 Community Survey results](https://discourse.nodered.org/t/2019-community-survey-results/12664)

<div class="topic-metadata">

**Author:** [@knolleary](https://discourse.nodered.org/u/knolleary)\
**Replies:** 4\
**Last updated:** [27 June 2019 19:30 UTC](https://discourse.nodered.org/t/2019-community-survey-results/12664 "2019-06-27T19:30:06Z")

</div>

Earlier this year we invited the community to complete a short survey about Node-RED. It has taken some time to compile the results, but we've finally published them (I just had to finish a big overhaul of the website f…

---

## [Best way to configure my node via messages](https://discourse.nodered.org/t/best-way-to-configure-my-node-via-messages/12252)

<div class="topic-metadata">

**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 22\
**Last updated:** [27 June 2019 15:42 UTC](https://discourse.nodered.org/t/best-way-to-configure-my-node-via-messages/12252 "2019-06-27T15:42:36Z")

</div>

Hi folks, I'm developing a new UI node that can be configured to a.o. add N LEDS on top of an image. In the following example I add 3 LEDs, each with a different color: Which results in something like this: Now I…

---

## [Weather reports - building a dashboard](https://discourse.nodered.org/t/weather-reports-building-a-dashboard/12663)

<div class="topic-metadata">

**Author:** [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\
**Replies:** 0\
**Last updated:** [27 June 2019 15:04 UTC](https://discourse.nodered.org/t/weather-reports-building-a-dashboard/12663 "2019-06-27T15:04:25Z")

</div>

I had a couple of new students join my IoT Computer Club a couple of weeks ago. This simple exercise extends the initial work they did by designing and building a simple dashboard. The dashboard has a number of 'soft' …

---

## [Weather reports from around the world](https://discourse.nodered.org/t/weather-reports-from-around-the-world/12662)

<div class="topic-metadata">

**Author:** [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\
**Replies:** 0\
**Last updated:** [27 June 2019 14:57 UTC](https://discourse.nodered.org/t/weather-reports-from-around-the-world/12662 "2019-06-27T14:57:53Z")

</div>

I had a couple of new students join my IoT Computer Club a couple of weeks ago and gave them this simple exercise to obtain weather reports from around the world. Here's the link to the PDF tutorial guide.

---

## [Save MQTT data to SQLite](https://discourse.nodered.org/t/save-mqtt-data-to-sqlite/12477)

<div class="topic-metadata">

**Author:** [@RickyChan21](https://discourse.nodered.org/u/RickyChan21)\
**Replies:** 13\
**Last updated:** [27 June 2019 12:43 UTC](https://discourse.nodered.org/t/save-mqtt-data-to-sqlite/12477 "2019-06-27T12:43:53Z")

</div>

I have an MQTT client on Node-RED subscribed to a client that publish temperature. Now I want to save this value into SQLite. Any solutions?

---

## [Cloud Integration](https://discourse.nodered.org/t/cloud-integration/12498)

<div class="topic-metadata">

**Author:** [@Corinna](https://discourse.nodered.org/u/Corinna)\
**Replies:** 7\
**Last updated:** [27 June 2019 12:11 UTC](https://discourse.nodered.org/t/cloud-integration/12498 "2019-06-27T12:11:10Z")

</div>

Hi guys, How can Node-Red be integrated in a cloud environment e.g. in Azure? As far as I understand Node-Red is a monolithic component consisting of a frontend and a backend. If I want to integrate it for several user…

---

## [File Lister node not returning filename unless Pi is logged in](https://discourse.nodered.org/t/file-lister-node-not-returning-filename-unless-pi-is-logged-in/12462)

<div class="topic-metadata">

**Author:** [@GregorR1](https://discourse.nodered.org/u/GregorR1)\
**Replies:** 38\
**Last updated:** [27 June 2019 09:12 UTC](https://discourse.nodered.org/t/file-lister-node-not-returning-filename-unless-pi-is-logged-in/12462 "2019-06-27T09:12:05Z")

</div>

Hi, I'm trying to use the filename node to find a file on a USB drive and use this to tell the File Write node where to write to. However, this is not working unless the Pi is logged in and I'm getting a "File could no…

---

## [Hi, how do I create timer based on certain voltage only](https://discourse.nodered.org/t/hi-how-do-i-create-timer-based-on-certain-voltage-only/12550)

<div class="topic-metadata">

**Author:** [@afiqkimii](https://discourse.nodered.org/u/afiqkimii)\
**Replies:** 2\
**Last updated:** [27 June 2019 06:52 UTC](https://discourse.nodered.org/t/hi-how-do-i-create-timer-based-on-certain-voltage-only/12550 "2019-06-27T06:52:00Z")

</div>

Im doing maintenance calling system project.I want the timer to start counting after the voltage exceeds certain limit.Is that possible? I have 4 input using modbus and switches.After clicking respective switches the vo…

---

## [Charts - is this a bug?](https://discourse.nodered.org/t/charts-is-this-a-bug/12643)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 1\
**Last updated:** [27 June 2019 06:47 UTC](https://discourse.nodered.org/t/charts-is-this-a-bug/12643 "2019-06-27T06:47:37Z")

</div>

I have a few charts on my flows. I have noticed that I am seeing this happen to them - now and then. Green: Good. Red: Bad. Weirdly, looking at it now, it looks ..... ok. Sort of. (maybe not.) The vertical res…

---

## [How to listen event when weblink(more information) is clicked on worldmap](https://discourse.nodered.org/t/how-to-listen-event-when-weblink-more-information-is-clicked-on-worldmap/12610)

<div class="topic-metadata">

**Author:** [@kiran007](https://discourse.nodered.org/u/kiran007)\
**Replies:** 1\
**Last updated:** [27 June 2019 06:21 UTC](https://discourse.nodered.org/t/how-to-listen-event-when-weblink-more-information-is-clicked-on-worldmap/12610 "2019-06-27T06:21:53Z")

</div>

I already use worldmap In node but it is not listen any event when weblink on popup of marker get clicked when weblink on popup of markers get clicked i want to store some data like lat,lon into global variable

---

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

<div class="topic-metadata">

**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")

</div>

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…

---

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

<div class="topic-metadata">

**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")

</div>

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

---

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

<div class="topic-metadata">

**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")

</div>

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…

---

## [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)

<div class="topic-metadata">

**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")

</div>

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 …

---

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

<div class="topic-metadata">

**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")

</div>

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.…

---

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

<div class="topic-metadata">

**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")

</div>

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

---

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

<div class="topic-metadata">

**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")

</div>

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 …

---

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

<div class="topic-metadata">

**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")

</div>

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…

---

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

<div class="topic-metadata">

**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")

</div>

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.

---

## [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)

<div class="topic-metadata">

**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")

</div>

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?

---

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

<div class="topic-metadata">

**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")

</div>

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 …

---

## [💥 uibuilder v2: New update and near completion](https://discourse.nodered.org/t/uibuilder-v2-new-update-and-near-completion/12301)

<div class="topic-metadata">

**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 3\
**Last updated:** [26 June 2019 15:07 UTC](https://discourse.nodered.org/t/uibuilder-v2-new-update-and-near-completion/12301 "2019-06-26T15:07:42Z")

</div>

Hi, despite extensive building work on the house getting in the way, I've managed to do some updates this weekend on the v2 branch of uibuilder. I've now pushed 2.0.0-dev4 to GitHub. We are really close to completing v2…

---

## [Node red reading domoticz](https://discourse.nodered.org/t/node-red-reading-domoticz/12360)

<div class="topic-metadata">

**Author:** [@ben1](https://discourse.nodered.org/u/ben1)\
**Replies:** 2\
**Last updated:** [26 June 2019 13:48 UTC](https://discourse.nodered.org/t/node-red-reading-domoticz/12360 "2019-06-26T13:48:09Z")

</div>

hi all i have a domoticz with a MQTT setup. I checked with this cmd that i can write to domoticz, it is working mosquitto\_pub -h localhost -m '{ "idx" : 48, "nvalue" : 0, "svalue" : "2.0" }' -t 'domoticz/in' Now, I w…

---

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

<div class="topic-metadata">

**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")

</div>

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 …

---

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

<div class="topic-metadata">

**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")

</div>

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

---

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

<div class="topic-metadata">

**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")

</div>

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…

[Previous page](https://discourse.nodered.org/latest.md?page=1260)

[Next page](https://discourse.nodered.org/latest.md?page=1262)