# Latest

**URL:** https://discourse.nodered.org/latest.md?page=1091

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

**Page:** 1092

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## [Multiple Instances of a Single UI Group](https://discourse.nodered.org/t/multiple-instances-of-a-single-ui-group/26655)

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**Author:** [@garynl](https://discourse.nodered.org/u/garynl)\
**Replies:** 0\
**Last updated:** [14 May 2020 13:25 UTC](https://discourse.nodered.org/t/multiple-instances-of-a-single-ui-group/26655 "2020-05-14T13:25:13Z")

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Is it possible to define a ui\_group containing several elements and to use that to display multiple instance on the dashboard? I have 5 Xiaomi temperature/humidity/pressure sensors and I would like to define the ui onc…

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## [Uibuilder: Security Proposal](https://discourse.nodered.org/t/uibuilder-security-proposal/19882)

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**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 17\
**Last updated:** [14 May 2020 13:08 UTC](https://discourse.nodered.org/t/uibuilder-security-proposal/19882 "2020-05-14T13:08:44Z")

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Hi all and once again welcome to a New Year. At the moment, I am trying to work out the best approach to securing uibuilder web apps while trying to keep a decent measure of simplicity. I'd like to share my current tho…

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## [Node-red Dashboard for a Energy Monitoring System](https://discourse.nodered.org/t/node-red-dashboard-for-a-energy-monitoring-system/26638)

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**Author:** [@eddy23](https://discourse.nodered.org/u/eddy23)\
**Replies:** 1\
**Last updated:** [14 May 2020 09:07 UTC](https://discourse.nodered.org/t/node-red-dashboard-for-a-energy-monitoring-system/26638 "2020-05-14T09:07:33Z")

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Hi, I am new to Node-red and I have been watching Youtube videos to learn the basics of node-red. I am using node-red to collect sensor data from a microcontroller and displaying it onto a dashboard using charts. Is th…

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## [How to authorize http api using post with username and password](https://discourse.nodered.org/t/how-to-authorize-http-api-using-post-with-username-and-password/26634)

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**Author:** [@Leeches](https://discourse.nodered.org/u/Leeches)\
**Replies:** 10\
**Last updated:** [14 May 2020 08:53 UTC](https://discourse.nodered.org/t/how-to-authorize-http-api-using-post-with-username-and-password/26634 "2020-05-14T08:53:40Z")

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Hello guys, I was trying to achieve something like that last few days.. What do I need. I need to POST data from api to obtain sessionId so I can use api further. Sadly I didn't even achieve to succesfully get 200 resp…

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## [Problems with I2C in node-red on Raspberry Pi](https://discourse.nodered.org/t/problems-with-i2c-in-node-red-on-raspberry-pi/26621)

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**Author:** [@oldstuffisgood](https://discourse.nodered.org/u/oldstuffisgood)\
**Replies:** 3\
**Last updated:** [14 May 2020 07:36 UTC](https://discourse.nodered.org/t/problems-with-i2c-in-node-red-on-raspberry-pi/26621 "2020-05-14T07:36:30Z")

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I'm having trouble with trying to get node-red to run my Python code and using I2C nodes on node-red. I used the following nodes so far, yet none of them work on my end for reasons explained below. exec node nod…

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## [API Event Listener](https://discourse.nodered.org/t/api-event-listener/26624)

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**Author:** [@DGRAY325](https://discourse.nodered.org/u/DGRAY325)\
**Replies:** 2\
**Last updated:** [14 May 2020 07:05 UTC](https://discourse.nodered.org/t/api-event-listener/26624 "2020-05-14T07:05:07Z")

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Really hoping someone can help me out, I am just starting to get dangerous with node.red but am still very much green. I believe what I am trying to do is rather simple, just can't wrap my head around it. What I want to…

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## [\[Home Assistant\] Improve NodeRed Flow](https://discourse.nodered.org/t/home-assistant-improve-nodered-flow/26585)

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**Author:** [@celeritas0725](https://discourse.nodered.org/u/celeritas0725)\
**Replies:** 12\
**Last updated:** [14 May 2020 04:31 UTC](https://discourse.nodered.org/t/home-assistant-improve-nodered-flow/26585 "2020-05-14T04:31:24Z")

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Hi! I want to ask your assistance on how to further improve the flow as seen below. If possible, for the part that asks the day, it will have one input with 7 outputs so that I can save space and copy only one node. TIA…

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## [CLP Rockwell\_nó](https://discourse.nodered.org/t/clp-rockwell-no/25881)

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**Author:** [@Fattore](https://discourse.nodered.org/u/Fattore)\
**Replies:** 30\
**Last updated:** [14 May 2020 01:13 UTC](https://discourse.nodered.org/t/clp-rockwell-no/25881 "2020-05-14T01:13:22Z")

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Pode me ajudar, estou tentando realizar um projeto de Dashboard, mas estou com dificuldade para inserir o nó no projeto do CLP e posteriormente criar os TAGs para interação com o Node-RED

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## [Insert data in sqlite or mssql](https://discourse.nodered.org/t/insert-data-in-sqlite-or-mssql/26262)

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**Author:** [@pvv](https://discourse.nodered.org/u/pvv)\
**Replies:** 7\
**Last updated:** [13 May 2020 22:26 UTC](https://discourse.nodered.org/t/insert-data-in-sqlite-or-mssql/26262 "2020-05-13T22:26:36Z")

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Hello everyone, I want insert data upto only some points (for example only entry 500 datapoints) in sqlite or sql database, and then data insertion will stop automatticaly. Is there any such node library available, or an…

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## [Error installing node-red-contrib-raspihats](https://discourse.nodered.org/t/error-installing-node-red-contrib-raspihats/26603)

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**Author:** [@Cmilian](https://discourse.nodered.org/u/Cmilian)\
**Replies:** 3\
**Last updated:** [13 May 2020 20:24 UTC](https://discourse.nodered.org/t/error-installing-node-red-contrib-raspihats/26603 "2020-05-13T20:24:16Z")

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Hi Guys, I need some help. I have been having problems installing the node-red-contrib-raspihats. Here is my error: 2020-05-13T15:55:14.531Z \[err\] ../src/./readi2cblock.cc:111:39: error: no matching function for call t…

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## [\[off topic\] Need advice getting started with D1/ESP/PI type "thing" projects](https://discourse.nodered.org/t/off-topic-need-advice-getting-started-with-d1-esp-pi-type-thing-projects/23408)

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**Author:** [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Replies:** 49\
**Last updated:** [13 May 2020 19:52 UTC](https://discourse.nodered.org/t/off-topic-need-advice-getting-started-with-d1-esp-pi-type-thing-projects/23408 "2020-05-13T19:52:53Z")

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Hi all, Firstly, sorry about the off topic post but I know there are some wonderfly helpful guys on here with experience on this stuff. I am looking to get into the whole Wemos ESP Pi-zero area of building "things". I…

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## [Algorithm timers](https://discourse.nodered.org/t/algorithm-timers/26113)

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**Author:** [@HDM](https://discourse.nodered.org/u/HDM)\
**Replies:** 12\
**Last updated:** [13 May 2020 19:40 UTC](https://discourse.nodered.org/t/algorithm-timers/26113 "2020-05-13T19:40:21Z")

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good afternoon I apologize in advance if the topic was earlier algorithm of operation after 60 seconds the display turns on 4 seconds are turned on, after disconnecting, 60 seconds are counted again, the cycle is repea…

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## [I can't send email?](https://discourse.nodered.org/t/i-cant-send-email/26598)

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**Author:** [@HELPME](https://discourse.nodered.org/u/HELPME)\
**Replies:** 1\
**Last updated:** [13 May 2020 19:40 UTC](https://discourse.nodered.org/t/i-cant-send-email/26598 "2020-05-13T19:40:01Z")

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Hi, I want to try to send email, I watched a lot video, but it doesn't work. Can you help me please? I just have a timestamp which connected to the e-mail node. The e-mail node: To: receiveemailfromnodered@gmail.com …

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## [MQTT Node: Subscribing to \`+/+/$homie\` does not work?](https://discourse.nodered.org/t/mqtt-node-subscribing-to-homie-does-not-work/26522)

<div class="topic-metadata">

**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 43\
**Last updated:** [13 May 2020 19:31 UTC](https://discourse.nodered.org/t/mqtt-node-subscribing-to-homie-does-not-work/26522 "2020-05-13T19:31:40Z")

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Hi, I'm trying to get to grips with Homie better in Node-RED. The Homie convention says that controllers must subscribe to +/+/$homie in order to auto-discover the homie root topic. Unfortunately, using the MQTT-in nod…

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## [CANopen protocol nodes](https://discourse.nodered.org/t/canopen-protocol-nodes/11501)

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**Author:** [@Aleksejevs](https://discourse.nodered.org/u/Aleksejevs)\
**Replies:** 8\
**Last updated:** [13 May 2020 18:30 UTC](https://discourse.nodered.org/t/canopen-protocol-nodes/11501 "2020-05-13T18:30:24Z")

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Hello everyone, Who can help with advice. I have MSI controller (Node-Red inside) with CanBus port. Are there special nodes for CanOpen? I need connect Joystick(CANopen) and radio control (CANopen). Thank you!

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## [How to modify node-red deploy operation to save flow to database](https://discourse.nodered.org/t/how-to-modify-node-red-deploy-operation-to-save-flow-to-database/26568)

<div class="topic-metadata">

**Author:** [@dhpatel177](https://discourse.nodered.org/u/dhpatel177)\
**Replies:** 40\
**Last updated:** [13 May 2020 18:09 UTC](https://discourse.nodered.org/t/how-to-modify-node-red-deploy-operation-to-save-flow-to-database/26568 "2020-05-13T18:09:11Z")

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Hello, Can you please guide me how can i call my external get and post api from flows.js file? Thanks

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## [How to decide between template and ui-template nodes](https://discourse.nodered.org/t/how-to-decide-between-template-and-ui-template-nodes/26553)

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**Author:** [@cadu](https://discourse.nodered.org/u/cadu)\
**Replies:** 2\
**Last updated:** [13 May 2020 16:40 UTC](https://discourse.nodered.org/t/how-to-decide-between-template-and-ui-template-nodes/26553 "2020-05-13T16:40:36Z")

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Hello! I'm fairly new to Node-RED and I need to send an email with basic HTML in a flow. However, it does have tables and some logic to hide a few elements if needed. As I'd never used the mustache syntax, when I read …

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## [24h time format for ui time input](https://discourse.nodered.org/t/24h-time-format-for-ui-time-input/26590)

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**Author:** [@iungo](https://discourse.nodered.org/u/iungo)\
**Replies:** 10\
**Last updated:** [13 May 2020 16:35 UTC](https://discourse.nodered.org/t/24h-time-format-for-ui-time-input/26590 "2020-05-13T16:35:49Z")

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Is it possible to change time format from 12h to 24h In some cases there is a problem to change time format in browser (chromium kiosk mode on raspbian lite) Maybe somebody has any solution?

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## [How to add slider on map sensor once on click it should do some action](https://discourse.nodered.org/t/how-to-add-slider-on-map-sensor-once-on-click-it-should-do-some-action/8700)

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**Author:** [@VIKRAMAS](https://discourse.nodered.org/u/VIKRAMAS)\
**Replies:** 13\
**Last updated:** [13 May 2020 16:14 UTC](https://discourse.nodered.org/t/how-to-add-slider-on-map-sensor-once-on-click-it-should-do-some-action/8700 "2020-05-13T16:14:59Z")

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In node-red I wanted to add slider on the dashboard world map, and once the user clicks on sensor mapped on world map it should show slider on tool tip.I wanted to control sensor based on that slider action is that possi…

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## [Grab text value from HTML](https://discourse.nodered.org/t/grab-text-value-from-html/26502)

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**Author:** [@Frank\_R](https://discourse.nodered.org/u/Frank_R)\
**Replies:** 8\
**Last updated:** [13 May 2020 16:05 UTC](https://discourse.nodered.org/t/grab-text-value-from-html/26502 "2020-05-13T16:05:04Z")

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Hi, im pretty new to node red and trying for a while now to grab some data from an internal webinterface. I could not get the HTTP request node to work as authentication will fail. I tried all combinations but no luck.…

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## [Setting up node-red-auth-github](https://discourse.nodered.org/t/setting-up-node-red-auth-github/6868)

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**Author:** [@SteveDonie](https://discourse.nodered.org/u/SteveDonie)\
**Replies:** 3\
**Last updated:** [13 May 2020 15:45 UTC](https://discourse.nodered.org/t/setting-up-node-red-auth-github/6868 "2020-05-13T15:45:27Z")

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I am trying to follow the instructions at https://www.npmjs.com/package/node-red-auth-github, but I am unclear on one thing - when I register the new application with github I am not sure what to put in the "Authorizatio…

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## [Get value from local webpage](https://discourse.nodered.org/t/get-value-from-local-webpage/26324)

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**Author:** [@nick](https://discourse.nodered.org/u/nick)\
**Replies:** 13\
**Last updated:** [13 May 2020 15:44 UTC](https://discourse.nodered.org/t/get-value-from-local-webpage/26324 "2020-05-13T15:44:21Z")

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Hi all, i have a local network with a device that has a webpage to show some status value's of it. now am i trying to get that information to a raspberry pi using node red. in the pictures below you will find the code…

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## [Icons for buttons with two functions - which to display when?](https://discourse.nodered.org/t/icons-for-buttons-with-two-functions-which-to-display-when/26414)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 14\
**Last updated:** [13 May 2020 15:28 UTC](https://discourse.nodered.org/t/icons-for-buttons-with-two-functions-which-to-display-when/26414 "2020-05-13T15:28:49Z")

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I have a button on my dashboard. In this instance it is the mute button for audio. The two icons are: So it begs the question: When the audio is working which icon should be visible? volume\_off or volume\_up? To…

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## [Node-red-contrib-ui-svg / DrawSVG](https://discourse.nodered.org/t/node-red-contrib-ui-svg-drawsvg/26484)

<div class="topic-metadata">

**Author:** [@tfmeier](https://discourse.nodered.org/u/tfmeier)\
**Replies:** 3\
**Last updated:** [13 May 2020 15:19 UTC](https://discourse.nodered.org/t/node-red-contrib-ui-svg-drawsvg/26484 "2020-05-13T15:19:48Z")

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I'm running Node-RED on the IBM Cloud when I came across node-red-contrib-ui-svg. What an opportunity to create dynamic dashboards for a home automation setup! Trying to find my around the wiki I tried to start the SVG …

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## [Node-red on windows hidden icons](https://discourse.nodered.org/t/node-red-on-windows-hidden-icons/26593)

<div class="topic-metadata">

**Author:** [@Nxito](https://discourse.nodered.org/u/Nxito)\
**Replies:** 2\
**Last updated:** [13 May 2020 14:44 UTC](https://discourse.nodered.org/t/node-red-on-windows-hidden-icons/26593 "2020-05-13T14:44:45Z")

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How should I do to hide the cmd that opens node-red in windows? Problems: having the cmd minimized can be annoying with an nssm service I cannot open windows of the desktop applications. so i think about leaving it a…

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## [How good is NodeRED in reading files?](https://discourse.nodered.org/t/how-good-is-nodered-in-reading-files/26572)

<div class="topic-metadata">

**Author:** [@syoma755](https://discourse.nodered.org/u/syoma755)\
**Replies:** 11\
**Last updated:** [13 May 2020 13:40 UTC](https://discourse.nodered.org/t/how-good-is-nodered-in-reading-files/26572 "2020-05-13T13:40:57Z")

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Hi all, I have one application in which a Linux machine capturing and saving to RAM disk a lot of traffic (telemetry). This traffic is quite huge - about 700MB/s. I do it with TCPdump, which works just fine. It creates …

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## [PCF8574P Chip via i2C](https://discourse.nodered.org/t/pcf8574p-chip-via-i2c/26449)

<div class="topic-metadata">

**Author:** [@Askjerry](https://discourse.nodered.org/u/Askjerry)\
**Replies:** 16\
**Last updated:** [13 May 2020 13:26 UTC](https://discourse.nodered.org/t/pcf8574p-chip-via-i2c/26449 "2020-05-13T13:26:50Z")

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I have several PCF8574P interface chips, this is an i2c to 8 I/O pins. You can use them for input or output and I have had great success with them when I was programming in python. I wanted to use them with Node Red, bu…

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## [Multiple times message triggering](https://discourse.nodered.org/t/multiple-times-message-triggering/26591)

<div class="topic-metadata">

**Author:** [@akhtar321h](https://discourse.nodered.org/u/akhtar321h)\
**Replies:** 6\
**Last updated:** [13 May 2020 12:51 UTC](https://discourse.nodered.org/t/multiple-times-message-triggering/26591 "2020-05-13T12:51:44Z")

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Hello Everyone, I want to trigger a node a specified number of times with the help of function node. Please give me solution for that. Thank you.

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## [How to access array element by index in mustache in template node](https://discourse.nodered.org/t/how-to-access-array-element-by-index-in-mustache-in-template-node/26588)

<div class="topic-metadata">

**Author:** [@PlkMarudny](https://discourse.nodered.org/u/PlkMarudny)\
**Replies:** 6\
**Last updated:** [13 May 2020 11:35 UTC](https://discourse.nodered.org/t/how-to-access-array-element-by-index-in-mustache-in-template-node/26588 "2020-05-13T11:35:16Z")

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I have a simple flow that generates xml file using a template. But I have troubles using the data from the payload that holds the nested properties, as if only the first level of nesting is supported. The flow is below,…

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## [More updates to my previous MQTT question](https://discourse.nodered.org/t/more-updates-to-my-previous-mqtt-question/26562)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 9\
**Last updated:** [13 May 2020 09:35 UTC](https://discourse.nodered.org/t/more-updates-to-my-previous-mqtt-question/26562 "2020-05-13T09:35:07Z")

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In follow up to: this It is still not consistent in what is happening. Or that's what I am seeing it as. This is a lot of screen shots. That may better. It may be worse. The scenario: I turn on this machine. Th…

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