# Latest

**URL:** https://discourse.nodered.org/latest.md?page=957

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

**Page:** 958

---

## [Change the X and Y axis labels in Chart](https://discourse.nodered.org/t/change-the-x-and-y-axis-labels-in-chart/35782)

<div class="topic-metadata">

**Author:** [@vishakraj](https://discourse.nodered.org/u/vishakraj)\
**Replies:** 1\
**Last updated:** [12 November 2020 06:35 UTC](https://discourse.nodered.org/t/change-the-x-and-y-axis-labels-in-chart/35782 "2020-11-12T06:35:50Z")

</div>

Hello, I am new to node red, I created a csv node to read csv file, then to a function, which extract two columns, like this var output = \[\]; var g\_total\_time = \[\]; var g\_energy= \[\]; for(let i=0; i\<data.length; i++) { …

---

## [Extract voltage value only from ADS1x15](https://discourse.nodered.org/t/extract-voltage-value-only-from-ads1x15/35647)

<div class="topic-metadata">

**Author:** [@rmystique](https://discourse.nodered.org/u/rmystique)\
**Replies:** 5\
**Last updated:** [12 November 2020 04:32 UTC](https://discourse.nodered.org/t/extract-voltage-value-only-from-ads1x15/35647 "2020-11-12T04:32:05Z")

</div>

So i have the a/d outputing this: { ADS1115 • I2C\_ADDRESS\_0x48 • Channel A0-GND • Voltage: 3.2901004058961765 } But i just want the message.payload to be the numerical voltage value so i can drive a guage with it, how?

---

## [How to send and receive messages between nodes?](https://discourse.nodered.org/t/how-to-send-and-receive-messages-between-nodes/35743)

<div class="topic-metadata">

**Author:** [@zl2su](https://discourse.nodered.org/u/zl2su)\
**Replies:** 2\
**Last updated:** [12 November 2020 01:07 UTC](https://discourse.nodered.org/t/how-to-send-and-receive-messages-between-nodes/35743 "2020-11-12T01:07:33Z")

</div>

Hi. As far as I know, Nodes send and receive messages between nodes in an event-driven manner. For example, you can view the results for data generated, such as debug nodes. Within the debug node, we checked that mess…

---

## [Node-Red container and machine learning node](https://discourse.nodered.org/t/node-red-container-and-machine-learning-node/35701)

<div class="topic-metadata">

**Author:** [@s19k15](https://discourse.nodered.org/u/s19k15)\
**Replies:** 13\
**Last updated:** [11 November 2020 23:52 UTC](https://discourse.nodered.org/t/node-red-container-and-machine-learning-node/35701 "2020-11-11T23:52:34Z")

</div>

I have a Windows System. Inside the Windows System, I have Virtual Box with Ubuntu Inside the Ubuntu, I have installed Node-Red as docker I have also installed the node-red-contrib-python-function. I have also instal…

---

## [Gpio: passing pin through msg.topic not working](https://discourse.nodered.org/t/gpio-passing-pin-through-msg-topic-not-working/35771)

<div class="topic-metadata">

**Author:** [@angusgrantBC](https://discourse.nodered.org/u/angusgrantBC)\
**Replies:** 3\
**Last updated:** [11 November 2020 23:50 UTC](https://discourse.nodered.org/t/gpio-passing-pin-through-msg-topic-not-working/35771 "2020-11-11T23:50:49Z")

</div>

Hi, I am using node-red-node-pi-gpio nodes to control solid state relays, which is all working fine when I assign the pin through the gpio node. I am wanting to assign the pin to use through msg.topic. The docs on the …

---

## [UIBuilder - Get list of open Websockets](https://discourse.nodered.org/t/uibuilder-get-list-of-open-websockets/35680)

<div class="topic-metadata">

**Author:** [@droberts](https://discourse.nodered.org/u/droberts)\
**Replies:** 3\
**Last updated:** [11 November 2020 23:48 UTC](https://discourse.nodered.org/t/uibuilder-get-list-of-open-websockets/35680 "2020-11-11T23:48:00Z")

</div>

I'm working on a multi-user dashboard to login to devices, and am using the sockets IDs output by by UIB to maintain a status array of all the current connections (Idle, processing data etc.) - unfortunately, our company…

---

## [Pi pin configuration Q](https://discourse.nodered.org/t/pi-pin-configuration-q/35690)

<div class="topic-metadata">

**Author:** [@RASelkirk](https://discourse.nodered.org/u/RASelkirk)\
**Replies:** 3\
**Last updated:** [11 November 2020 22:57 UTC](https://discourse.nodered.org/t/pi-pin-configuration-q/35690 "2020-11-11T22:57:42Z")

</div>

If I configure my pins as in this diagram: input is low when output is low, input is high when output is high|690x361 Do I need to set my N-R pins as pull up/down or none? Thanks! Russ Also, is this the section wher…

---

## [Any data structure with key, value but key not unique?](https://discourse.nodered.org/t/any-data-structure-with-key-value-but-key-not-unique/35766)

<div class="topic-metadata">

**Author:** [@torrent](https://discourse.nodered.org/u/torrent)\
**Replies:** 3\
**Last updated:** [11 November 2020 22:38 UTC](https://discourse.nodered.org/t/any-data-structure-with-key-value-but-key-not-unique/35766 "2020-11-11T22:38:50Z")

</div>

Hi, I am looking for a data structure with key and value (Map or Dictionary) but key is not unique in Node-Red. I have tried with this var map1 = new Map(); map1.set("test", "value"); but it doesn't work at all.

---

## [Switch node backround](https://discourse.nodered.org/t/switch-node-backround/35655)

<div class="topic-metadata">

**Author:** [@niclas.w82](https://discourse.nodered.org/u/niclas.w82)\
**Replies:** 6\
**Last updated:** [11 November 2020 22:33 UTC](https://discourse.nodered.org/t/switch-node-backround/35655 "2020-11-11T22:33:18Z")

</div>

Hi. Is it possible to change the backround colour dynamicly for a switch node depending the input? /Niclas

---

## [No able to move position of button in dashboard layout](https://discourse.nodered.org/t/no-able-to-move-position-of-button-in-dashboard-layout/35761)

<div class="topic-metadata">

**Author:** [@1984](https://discourse.nodered.org/u/1984)\
**Replies:** 9\
**Last updated:** [11 November 2020 22:19 UTC](https://discourse.nodered.org/t/no-able-to-move-position-of-button-in-dashboard-layout/35761 "2020-11-11T22:19:14Z")

</div>

Hi, in my dashboard layout i would like to move some element to another position. I can see my element but im not able to move them. i see a lock icon if i click on it unlocks then i cant change the place. see the im…

---

## [Font size in Label](https://discourse.nodered.org/t/font-size-in-label/35713)

<div class="topic-metadata">

**Author:** [@RASelkirk](https://discourse.nodered.org/u/RASelkirk)\
**Replies:** 6\
**Last updated:** [11 November 2020 18:29 UTC](https://discourse.nodered.org/t/font-size-in-label/35713 "2020-11-11T18:29:38Z")

</div>

Hi All, I'm using a label node with blank label, instead using msg.topic for the label text and I am able to programmatically change that as desired. I'd like to be able change the standard font size to something larger…

---

## [Turn on valve for x minutes, then off](https://discourse.nodered.org/t/turn-on-valve-for-x-minutes-then-off/35732)

<div class="topic-metadata">

**Author:** [@skrgahr](https://discourse.nodered.org/u/skrgahr)\
**Replies:** 4\
**Last updated:** [11 November 2020 16:00 UTC](https://discourse.nodered.org/t/turn-on-valve-for-x-minutes-then-off/35732 "2020-11-11T16:00:35Z")

</div>

Hello, I need some help. I'm integrating greenhouse automatization, and I want to turn off/on solenoid valve via MQTT. My idea is to have a pop up or something on some dashboard button to prompt how much time do I want…

---

## [I'd like to ask you to make a toggle stitch](https://discourse.nodered.org/t/id-like-to-ask-you-to-make-a-toggle-stitch/35736)

<div class="topic-metadata">

**Author:** [@murondo](https://discourse.nodered.org/u/murondo)\
**Replies:** 1\
**Last updated:** [11 November 2020 15:44 UTC](https://discourse.nodered.org/t/id-like-to-ask-you-to-make-a-toggle-stitch/35736 "2020-11-11T15:44:40Z")

</div>

Click the button like a toggle switch to turn the 38 PIN on and the 40th pin off. Click once again to turn off pin 38 and turn on pin 40. In the middle, it turns 38 or 40 pins off. \[{"id":"12c046b3.627009","type":"f…

---

## [How to modify Node-RED name on the left side in login page?](https://discourse.nodered.org/t/how-to-modify-node-red-name-on-the-left-side-in-login-page/35665)

<div class="topic-metadata">

**Author:** [@asprakash](https://discourse.nodered.org/u/asprakash)\
**Replies:** 6\
**Last updated:** [11 November 2020 15:37 UTC](https://discourse.nodered.org/t/how-to-modify-node-red-name-on-the-left-side-in-login-page/35665 "2020-11-11T15:37:01Z")

</div>

Hi. I am trying to modify the "Node-RED" name on the left side in admin login page. However, I am unable to find out where we need to edit. Any kind of help is appreciated. TIA.

---

## [Problem with msgRecvd in uibuilder](https://discourse.nodered.org/t/problem-with-msgrecvd-in-uibuilder/35662)

<div class="topic-metadata">

**Author:** [@Verina](https://discourse.nodered.org/u/Verina)\
**Replies:** 9\
**Last updated:** [11 November 2020 15:16 UTC](https://discourse.nodered.org/t/problem-with-msgrecvd-in-uibuilder/35662 "2020-11-11T15:16:06Z")

</div>

I want to use the uibuilder node to make a page that get data from user. This data contains a name . The ui should take that name and send it to the flow to check if it is not repeated in the database and returns to the…

---

## [What is the Node.js command prompt used for?](https://discourse.nodered.org/t/what-is-the-node-js-command-prompt-used-for/35748)

<div class="topic-metadata">

**Author:** [@adamelli](https://discourse.nodered.org/u/adamelli)\
**Replies:** 1\
**Last updated:** [11 November 2020 14:42 UTC](https://discourse.nodered.org/t/what-is-the-node-js-command-prompt-used-for/35748 "2020-11-11T14:42:36Z")

</div>

Just curious. All the applications I've done using Node-RED use the regular Command Prompt. (I haven't had much luck just searching for this question as I only saw unrelated results.)

---

## [User programmed commands](https://discourse.nodered.org/t/user-programmed-commands/35632)

<div class="topic-metadata">

**Author:** [@adamelli](https://discourse.nodered.org/u/adamelli)\
**Replies:** 19\
**Last updated:** [11 November 2020 13:49 UTC](https://discourse.nodered.org/t/user-programmed-commands/35632 "2020-11-11T13:49:33Z")

</div>

Is there a way to allow users to select a timeline of commands for a device to do? For example, say the application is a wheeled robot. The user wants it to go forward for one yard, then move left for two yards, forward …

---

## [Icons only in side bar](https://discourse.nodered.org/t/icons-only-in-side-bar/6628)

<div class="topic-metadata">

**Author:** [@pepedros](https://discourse.nodered.org/u/pepedros)\
**Replies:** 12\
**Last updated:** [11 November 2020 13:05 UTC](https://discourse.nodered.org/t/icons-only-in-side-bar/6628 "2020-11-11T13:05:47Z")

</div>

Hi. It is possible to hide tab names in side bar, and show only tab icon with narrow side bar?

---

## [MQTT node disconnected](https://discourse.nodered.org/t/mqtt-node-disconnected/35724)

<div class="topic-metadata">

**Author:** [@thecoder](https://discourse.nodered.org/u/thecoder)\
**Replies:** 15\
**Last updated:** [11 November 2020 12:49 UTC](https://discourse.nodered.org/t/mqtt-node-disconnected/35724 "2020-11-11T12:49:49Z")

</div>

My flow shows the MQTT nodes as disconnected, I'm running mosquitto. It runs on port 1883 and the MQTT nodes are configured to connect in localhost on port 1883 When I run Node-red "node-red", I get this error at th…

---

## [Cusom mqtt dynamic certs configurations?](https://discourse.nodered.org/t/cusom-mqtt-dynamic-certs-configurations/35729)

<div class="topic-metadata">

**Author:** [@thasin](https://discourse.nodered.org/u/thasin)\
**Replies:** 0\
**Last updated:** [11 November 2020 10:07 UTC](https://discourse.nodered.org/t/cusom-mqtt-dynamic-certs-configurations/35729 "2020-11-11T10:07:39Z")

</div>

I am new to node-red. I used to get messages from topic using AWS Mqtt node. It was working fine when I have already configured certs and topic. In my case, I want to use dynamic certs configuration and topic. For this,…

---

## [Editor menu customization](https://discourse.nodered.org/t/editor-menu-customization/35737)

<div class="topic-metadata">

**Author:** [@josekavunkal](https://discourse.nodered.org/u/josekavunkal)\
**Replies:** 2\
**Last updated:** [11 November 2020 11:07 UTC](https://discourse.nodered.org/t/editor-menu-customization/35737 "2020-11-11T11:07:00Z")

</div>

I can easily change the "Help" menu and add my own link to it using editor themes . Same way is there a documentation which explains how to add a new menu to editor and add an action to that?

---

## [Function node to compare a msg.payload string](https://discourse.nodered.org/t/function-node-to-compare-a-msg-payload-string/35668)

<div class="topic-metadata">

**Author:** [@leeg77](https://discourse.nodered.org/u/leeg77)\
**Replies:** 7\
**Last updated:** [11 November 2020 10:01 UTC](https://discourse.nodered.org/t/function-node-to-compare-a-msg-payload-string/35668 "2020-11-11T10:01:51Z")

</div>

I am using the Tesseract node to read some text that I want to compare but it isn't working out. In this case I want to compare the output of the Tesseract node which with the string "DEL" This is my function node …

---

## [How to measurement data in file csv from model Tensorflow](https://discourse.nodered.org/t/how-to-measurement-data-in-file-csv-from-model-tensorflow/35726)

<div class="topic-metadata">

**Author:** [@pelarnut01](https://discourse.nodered.org/u/pelarnut01)\
**Replies:** 0\
**Last updated:** [11 November 2020 09:07 UTC](https://discourse.nodered.org/t/how-to-measurement-data-in-file-csv-from-model-tensorflow/35726 "2020-11-11T09:07:58Z")

</div>

how to measurement data in file csv from model Tensorflow i have data1 to model trian from csv file and i have law gas data2 but no label but i want measurement data2 What That it is close to the label What kind of …

---

## [Token Authorization flow](https://discourse.nodered.org/t/token-authorization-flow/35715)

<div class="topic-metadata">

**Author:** [@Tico](https://discourse.nodered.org/u/Tico)\
**Replies:** 2\
**Last updated:** [11 November 2020 08:15 UTC](https://discourse.nodered.org/t/token-authorization-flow/35715 "2020-11-11T08:15:28Z")

</div>

Please refer to the attached screenshot - The top line is a successful HTTP POST request that returns an IDToken. The IDToken needs to be used in a subsequent HTTP GET request to retrieve the data I require. The atta…

---

## [How should catch send mail?](https://discourse.nodered.org/t/how-should-catch-send-mail/35643)

<div class="topic-metadata">

**Author:** [@minhhn0205](https://discourse.nodered.org/u/minhhn0205)\
**Replies:** 8\
**Last updated:** [11 November 2020 07:13 UTC](https://discourse.nodered.org/t/how-should-catch-send-mail/35643 "2020-11-11T07:13:24Z")

</div>

I use the email node to send mail, in case I have not entered information for this mail node, the sending mail will fail. I wanted to handle this error so I used the catch node, I initialize the default isSendMail varia…

---

## [Get value of numeric input node](https://discourse.nodered.org/t/get-value-of-numeric-input-node/35673)

<div class="topic-metadata">

**Author:** [@BenrdP](https://discourse.nodered.org/u/BenrdP)\
**Replies:** 8\
**Last updated:** [11 November 2020 00:10 UTC](https://discourse.nodered.org/t/get-value-of-numeric-input-node/35673 "2020-11-11T00:10:58Z")

</div>

Hello, I have different input fields and I want to read out the content each second. I used the "get state" node to trigger the reading for each second together with a "function node". With the following content thi…

---

## [A simple flow to manage flows.json version (non-GIT)](https://discourse.nodered.org/t/a-simple-flow-to-manage-flows-json-version-non-git/35709)

<div class="topic-metadata">

**Author:** [@T0T4R4](https://discourse.nodered.org/u/T0T4R4)\
**Replies:** 0\
**Last updated:** [10 November 2020 23:49 UTC](https://discourse.nodered.org/t/a-simple-flow-to-manage-flows-json-version-non-git/35709 "2020-11-10T23:49:55Z")

</div>

Okay, I know there is the project feature, git-enabled, etc... But I have some issues with it that I will raise in a separate thread. In the meantime, here is a little flow that simply computes a hash on flows.json and …

---

## [Searching for Exoplanets with Node-Red](https://discourse.nodered.org/t/searching-for-exoplanets-with-node-red/14239)

<div class="topic-metadata">

**Author:** [@T0T4R4](https://discourse.nodered.org/u/T0T4R4)\
**Replies:** 9\
**Last updated:** [10 November 2020 23:36 UTC](https://discourse.nodered.org/t/searching-for-exoplanets-with-node-red/14239 "2020-11-10T23:36:34Z")

</div>

MINERVA Australis, a robotic telescope array dedicated to exoplanet research How about using Node-Red to automate a multi-million dollar telescope array research facility ? See my post on reddit on how we used Node-Red…

---

## [Setting dashboard theme on start using uicontrol?](https://discourse.nodered.org/t/setting-dashboard-theme-on-start-using-uicontrol/35707)

<div class="topic-metadata">

**Author:** [@T0T4R4](https://discourse.nodered.org/u/T0T4R4)\
**Replies:** 2\
**Last updated:** [10 November 2020 23:29 UTC](https://discourse.nodered.org/t/setting-dashboard-theme-on-start-using-uicontrol/35707 "2020-11-10T23:29:31Z")

</div>

Hi guys, The question's in the title. Because nodered dashboard always ends up resetting its theme to blue/white when nodered restarts (sporadically, but enough to be annoying), I would like to force it on restart. Is …

---

## [How use biguint64 in buffer.parser](https://discourse.nodered.org/t/how-use-biguint64-in-buffer-parser/35688)

<div class="topic-metadata">

**Author:** [@thecoder](https://discourse.nodered.org/u/thecoder)\
**Replies:** 8\
**Last updated:** [10 November 2020 23:21 UTC](https://discourse.nodered.org/t/how-use-biguint64-in-buffer-parser/35688 "2020-11-10T23:21:29Z")

</div>

I need to parse a group of bits among 5 bytes, so, I need to use the format biguint64(be), however, I get an error. "TypeError: Cannot read property 'bind' of undefined" The group of interest is the following (in itali…

[Previous page](https://discourse.nodered.org/latest.md?page=956)

[Next page](https://discourse.nodered.org/latest.md?page=958)