# Latest

**URL:** https://discourse.nodered.org/latest.md?page=593

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

**Page:** 594

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## [Connection failed to broker ()](https://discourse.nodered.org/t/connection-failed-to-broker/60968)

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**Author:** [@bilel](https://discourse.nodered.org/u/bilel)\
**Replies:** 3\
**Last updated:** [8 April 2022 09:50 UTC](https://discourse.nodered.org/t/connection-failed-to-broker/60968 "2022-04-08T09:50:24Z")

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## [Ui nodes on dashboard showing borders , when I have not added any](https://discourse.nodered.org/t/ui-nodes-on-dashboard-showing-borders-when-i-have-not-added-any/60938)

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**Author:** [@Ganesh](https://discourse.nodered.org/u/Ganesh)\
**Replies:** 2\
**Last updated:** [8 April 2022 09:11 UTC](https://discourse.nodered.org/t/ui-nodes-on-dashboard-showing-borders-when-i-have-not-added-any/60938 "2022-04-08T09:11:04Z")

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Hi In my node-red dashboard screen I am facing a issues As You can see in below image for UI text -box and gauges etc., its showing borders for some elements , but I have not added any borders or padding to the elemen…

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## [Im about to connect esp32 with rpi pi3 via mqtt it seems not working](https://discourse.nodered.org/t/im-about-to-connect-esp32-with-rpi-pi3-via-mqtt-it-seems-not-working/60950)

<div class="topic-metadata">

**Author:** [@bilel](https://discourse.nodered.org/u/bilel)\
**Replies:** 4\
**Last updated:** [7 April 2022 20:28 UTC](https://discourse.nodered.org/t/im-about-to-connect-esp32-with-rpi-pi3-via-mqtt-it-seems-not-working/60950 "2022-04-07T20:28:09Z")

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Uploading: Capture d’écran 2022-04-07 181318.png...

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## [TCP node what is buffer and stream exactly?](https://discourse.nodered.org/t/tcp-node-what-is-buffer-and-stream-exactly/60847)

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**Author:** [@Joris6](https://discourse.nodered.org/u/Joris6)\
**Replies:** 4\
**Last updated:** [7 April 2022 20:37 UTC](https://discourse.nodered.org/t/tcp-node-what-is-buffer-and-stream-exactly/60847 "2022-04-07T20:37:49Z")

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I was experimenting with an Arduino to Node-RED, where I heavily tested the TCP connection to be slow. Here I got a bit confused what the TCP node exactly does. The documentation couldn't help me further. I made a list h…

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## [Error Reading Modbus tcp](https://discourse.nodered.org/t/error-reading-modbus-tcp/60786)

<div class="topic-metadata">

**Author:** [@motosierra1141](https://discourse.nodered.org/u/motosierra1141)\
**Replies:** 6\
**Last updated:** [7 April 2022 20:32 UTC](https://discourse.nodered.org/t/error-reading-modbus-tcp/60786 "2022-04-07T20:32:12Z")

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Hello everyone i'm trying to read Modbus wirh fc03 holding input register, everytime i get "Error: Modbus exception 3: Illegal data value (value cannot be written to this register)" i know that sounds like i'm trying to …

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## [Calling C code from within node-red](https://discourse.nodered.org/t/calling-c-code-from-within-node-red/60742)

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**Author:** [@Hishamjz](https://discourse.nodered.org/u/Hishamjz)\
**Replies:** 15\
**Last updated:** [7 April 2022 18:02 UTC](https://discourse.nodered.org/t/calling-c-code-from-within-node-red/60742 "2022-04-07T18:02:43Z")

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Hello everybody, I'm new to javascript. I am interested in running C code inside of node-red. I have read it is possible to run C code in Javascript code using C++ addons, is this possible to do in Node-RED? if not, is …

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## [Android and iOS Mobile Apps for Node-Red](https://discourse.nodered.org/t/android-and-ios-mobile-apps-for-node-red/60954)

<div class="topic-metadata">

**Author:** [@CONNECT](https://discourse.nodered.org/u/CONNECT)\
**Replies:** 0\
**Last updated:** [7 April 2022 17:37 UTC](https://discourse.nodered.org/t/android-and-ios-mobile-apps-for-node-red/60954 "2022-04-07T17:37:43Z")

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Android and iOS Mobile Apps for Node-Red DEMO dashboard http://smart.iglass.international:8072 Login: demo Password: demo

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## [How to compare two values (number input) and(mqtt node) and return true if they're equal](https://discourse.nodered.org/t/how-to-compare-two-values-number-input-and-mqtt-node-and-return-true-if-theyre-equal/60945)

<div class="topic-metadata">

**Author:** [@emnabk\_12](https://discourse.nodered.org/u/emnabk_12)\
**Replies:** 2\
**Last updated:** [7 April 2022 15:31 UTC](https://discourse.nodered.org/t/how-to-compare-two-values-number-input-and-mqtt-node-and-return-true-if-theyre-equal/60945 "2022-04-07T15:31:24Z")

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Hey, I want to compare an entering value of a sensor in MQTT node with a number I choose from dashboard and return "True" if they're equal, this didn't seem to work with the Switch node, and even with the function node …

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## [How to update data when returning to a tab in dashboard](https://discourse.nodered.org/t/how-to-update-data-when-returning-to-a-tab-in-dashboard/60936)

<div class="topic-metadata">

**Author:** [@intergus](https://discourse.nodered.org/u/intergus)\
**Replies:** 3\
**Last updated:** [7 April 2022 15:12 UTC](https://discourse.nodered.org/t/how-to-update-data-when-returning-to-a-tab-in-dashboard/60936 "2022-04-07T15:12:32Z")

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I have an svg of a fan. When you give it the command to rotate the blades, they do it perfectly, but every time a new payload arrives, it restarts the rotation and this displays a very ugly and undesirable jump. I avoide…

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## [Disable a dropdown node on the basis of a switch node result](https://discourse.nodered.org/t/disable-a-dropdown-node-on-the-basis-of-a-switch-node-result/60882)

<div class="topic-metadata">

**Author:** [@QGIO](https://discourse.nodered.org/u/QGIO)\
**Replies:** 11\
**Last updated:** [7 April 2022 14:56 UTC](https://discourse.nodered.org/t/disable-a-dropdown-node-on-the-basis-of-a-switch-node-result/60882 "2022-04-07T14:56:09Z")

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Is there a way to disable a dropdown node on the basis of a switch node result?

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## [Ecobee Custom Preset Modes](https://discourse.nodered.org/t/ecobee-custom-preset-modes/60944)

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**Author:** [@CAL37](https://discourse.nodered.org/u/CAL37)\
**Replies:** 0\
**Last updated:** [7 April 2022 14:48 UTC](https://discourse.nodered.org/t/ecobee-custom-preset-modes/60944 "2022-04-07T14:48:31Z")

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I have Ecobee integrated into Home Assistant and have 2 custom preset modes "School Day" and "Guest Mode". I can use the call service to change the default ones just fine home, away, sleep, but for some reason it will no…

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## [Connect Hue with RGBW](https://discourse.nodered.org/t/connect-hue-with-rgbw/14925)

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**Author:** [@wburst](https://discourse.nodered.org/u/wburst)\
**Replies:** 11\
**Last updated:** [7 April 2022 14:30 UTC](https://discourse.nodered.org/t/connect-hue-with-rgbw/14925 "2022-04-07T14:30:36Z")

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Hi Guys I have a little Problem with Hue I have KNX and want to control Hue From KNX i just have seperate Objects for R,G,B,W and want to connect this to the Hue ligth. But how can i do this. theoretical i ned 4 Slid…

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## [Table with temperatures in horizontal axe and timestamps in vertical axe](https://discourse.nodered.org/t/table-with-temperatures-in-horizontal-axe-and-timestamps-in-vertical-axe/60942)

<div class="topic-metadata">

**Author:** [@DemalCal96](https://discourse.nodered.org/u/DemalCal96)\
**Replies:** 0\
**Last updated:** [7 April 2022 14:24 UTC](https://discourse.nodered.org/t/table-with-temperatures-in-horizontal-axe-and-timestamps-in-vertical-axe/60942 "2022-04-07T14:24:08Z")

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Hello everyone I have an MQTT IN node that receives temperature data (Temp1, Temp2, Temp3, Temp4) that can be distinguished by its topic. The Message payload contains a Value parameter (which is the temperature) and a T…

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## [Best way to wire switches in parallell?](https://discourse.nodered.org/t/best-way-to-wire-switches-in-parallell/60707)

<div class="topic-metadata">

**Author:** [@houser](https://discourse.nodered.org/u/houser)\
**Replies:** 19\
**Last updated:** [7 April 2022 14:17 UTC](https://discourse.nodered.org/t/best-way-to-wire-switches-in-parallell/60707 "2022-04-07T14:17:20Z")

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Hello, Would appreciate some help with the attached flow. The flow works but is a bit of a hack and I would appreciate a hint or two of how you would do this to optimize it. It is simply three switches wired in parall…

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## [Lock trace colors in ui\_chart](https://discourse.nodered.org/t/lock-trace-colors-in-ui-chart/60939)

<div class="topic-metadata">

**Author:** [@Geppy57](https://discourse.nodered.org/u/Geppy57)\
**Replies:** 0\
**Last updated:** [7 April 2022 13:17 UTC](https://discourse.nodered.org/t/lock-trace-colors-in-ui-chart/60939 "2022-04-07T13:17:51Z")

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Hi all. I see with multiple trace charts that some edit inside ui\_chart node can modify the order / trace color. I see into dashboard config fields but I do not see anything that allows this functionality. There is so…

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## [Gps data collating satellite info on GPGSV messages](https://discourse.nodered.org/t/gps-data-collating-satellite-info-on-gpgsv-messages/60832)

<div class="topic-metadata">

**Author:** [@vikingsraven](https://discourse.nodered.org/u/vikingsraven)\
**Replies:** 6\
**Last updated:** [7 April 2022 13:09 UTC](https://discourse.nodered.org/t/gps-data-collating-satellite-info-on-gpgsv-messages/60832 "2022-04-07T13:09:34Z")

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Hi all, I'm working on some gps data using GSV messages. what i would like to do and am failing miserably at is to collate the data into a json message. GSV sends 19 blocks of data. blocks are 1 Total Number of mess…

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## [Exec node can't execute the command but terminal does](https://discourse.nodered.org/t/exec-node-cant-execute-the-command-but-terminal-does/60892)

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**Author:** [@Raver](https://discourse.nodered.org/u/Raver)\
**Replies:** 11\
**Last updated:** [7 April 2022 12:54 UTC](https://discourse.nodered.org/t/exec-node-cant-execute-the-command-but-terminal-does/60892 "2022-04-07T12:54:45Z")

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Hi. I can run in terminal: "./speech.sh hello" all ok but in exec node runs with no error, i didn't hear "hello" from speakers and the output message is: Terminal type \`unknown' is not defined. Can anyone help me i tri…

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## [No error logging with catch node](https://discourse.nodered.org/t/no-error-logging-with-catch-node/60933)

<div class="topic-metadata">

**Author:** [@AMWN](https://discourse.nodered.org/u/AMWN)\
**Replies:** 5\
**Last updated:** [7 April 2022 11:52 UTC](https://discourse.nodered.org/t/no-error-logging-with-catch-node/60933 "2022-04-07T11:52:55Z")

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I really like to use te catch node, to catch errors and program logic after that.For example, I use this to response http 500, with error message to the client side. I mostly use node-red as backend (API). All loging fr…

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## [Disregard "undefined" msg](https://discourse.nodered.org/t/disregard-undefined-msg/60918)

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**Author:** [@FeliceM](https://discourse.nodered.org/u/FeliceM)\
**Replies:** 7\
**Last updated:** [7 April 2022 11:38 UTC](https://discourse.nodered.org/t/disregard-undefined-msg/60918 "2022-04-07T11:38:01Z")

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In a normal situation my payload is like this: 1:13.5230:14.0900:0.0000:0.0000:24:24:216:216 Time to time I get back messages like this: Cells : msg : Object object payload: object NaNVCNaN: undefined NaNTCNaN: u…

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## [How add circles in svg based on number of incoming inputs](https://discourse.nodered.org/t/how-add-circles-in-svg-based-on-number-of-incoming-inputs/60773)

<div class="topic-metadata">

**Author:** [@Ganesh](https://discourse.nodered.org/u/Ganesh)\
**Replies:** 6\
**Last updated:** [7 April 2022 11:07 UTC](https://discourse.nodered.org/t/how-add-circles-in-svg-based-on-number-of-incoming-inputs/60773 "2022-04-07T11:07:05Z")

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Hi I have around 250 Tags in database for every tag I want to display a circle on SVG Image , and the number of tags in dB keep varying , with it the circles in SVG should also vary Ex = if I have 50 Tags in dB then…

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## [Twitter Direct Message](https://discourse.nodered.org/t/twitter-direct-message/2781)

<div class="topic-metadata">

**Author:** [@PdeJ](https://discourse.nodered.org/u/PdeJ)\
**Replies:** 5\
**Last updated:** [7 April 2022 10:30 UTC](https://discourse.nodered.org/t/twitter-direct-message/2781 "2022-04-07T10:30:14Z")

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Would appreciate a walk through of how to send a direct message with the twitter node using "D {username} {message}".

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## [Connect Azure IoT Hub to node red](https://discourse.nodered.org/t/connect-azure-iot-hub-to-node-red/60926)

<div class="topic-metadata">

**Author:** [@moadoma](https://discourse.nodered.org/u/moadoma)\
**Replies:** 2\
**Last updated:** [7 April 2022 08:54 UTC](https://discourse.nodered.org/t/connect-azure-iot-hub-to-node-red/60926 "2022-04-07T08:54:52Z")

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Hi! I'm having a problem with connecting my hub to node red. I was watching this tutorial and I have the same "Azure IoT Hub" node from "cloud", the difference is that when he edit the node in properties it says "conne…

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## [Boolean Logic Ultimate update](https://discourse.nodered.org/t/boolean-logic-ultimate-update/58086)

<div class="topic-metadata">

**Author:** [@Supergiovane](https://discourse.nodered.org/u/Supergiovane)\
**Replies:** 1\
**Last updated:** [7 April 2022 08:13 UTC](https://discourse.nodered.org/t/boolean-logic-ultimate-update/58086 "2022-04-07T08:13:01Z")

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Boolean Logic Ultimate nodeset has been updated. You can also find a youtube "how-to" video for each node (the link is in the configuration window). Otherwise, you can see the full playlist here. LINK:Boolean Logic Ul…

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## [Pause/resume and Home printer Octoprint API](https://discourse.nodered.org/t/pause-resume-and-home-printer-octoprint-api/60577)

<div class="topic-metadata">

**Author:** [@liminal](https://discourse.nodered.org/u/liminal)\
**Replies:** 4\
**Last updated:** [7 April 2022 01:53 UTC](https://discourse.nodered.org/t/pause-resume-and-home-printer-octoprint-api/60577 "2022-04-07T01:53:41Z")

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Hey guys, I have been able to work out how to shutdown my printer using the function and HTTP nodes. But no idea how to send this POST /api/printer/printhead HTTP/1.1 Host: example.com Content-Type: application/json X…

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## [HTTP IN node - gives 500 internal server error response](https://discourse.nodered.org/t/http-in-node-gives-500-internal-server-error-response/60899)

<div class="topic-metadata">

**Author:** [@hughjms](https://discourse.nodered.org/u/hughjms)\
**Replies:** 0\
**Last updated:** [6 April 2022 21:25 UTC](https://discourse.nodered.org/t/http-in-node-gives-500-internal-server-error-response/60899 "2022-04-06T21:25:47Z")

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Hi , I am attempting to replicate the very simple use of the HTTP IN node from the documentation . It's part of my Home Assistant setup running on a rasberry Pi . Each time I attempt a curl statement from a PC to t…

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## [Snap package, after update to 2.2.2 Error: EPERM: operation not permitted, copyfile](https://discourse.nodered.org/t/snap-package-after-update-to-2-2-2-error-eperm-operation-not-permitted-copyfile/60792)

<div class="topic-metadata">

**Author:** [@iamhermes](https://discourse.nodered.org/u/iamhermes)\
**Replies:** 2\
**Last updated:** [6 April 2022 20:14 UTC](https://discourse.nodered.org/t/snap-package-after-update-to-2-2-2-error-eperm-operation-not-permitted-copyfile/60792 "2022-04-06T20:14:02Z")

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after update to newest stable from 2022-03-29 i can't apply changes in flows old version (677) works if i revert the 800 to 677 revision snap refresh did not work, error message did not disappear log entry: 2022-04-0…

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## [Schedex of Cronplus node for a dashboard Alarm Clock?](https://discourse.nodered.org/t/schedex-of-cronplus-node-for-a-dashboard-alarm-clock/59789)

<div class="topic-metadata">

**Author:** [@gschmidt](https://discourse.nodered.org/u/gschmidt)\
**Replies:** 5\
**Last updated:** [6 April 2022 18:32 UTC](https://discourse.nodered.org/t/schedex-of-cronplus-node-for-a-dashboard-alarm-clock/59789 "2022-04-06T18:32:47Z")

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Hi, I am trying to create a weekday alarm clock live dashboard. The image below is the user interface If the time is set and the day is activated, a music stream is send with a Castv2 Node to a Google Home mini devi…

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## [Converter decimal 16 bits to UFT-8](https://discourse.nodered.org/t/converter-decimal-16-bits-to-uft-8/60883)

<div class="topic-metadata">

**Author:** [@bparra](https://discourse.nodered.org/u/bparra)\
**Replies:** 2\
**Last updated:** [6 April 2022 17:17 UTC](https://discourse.nodered.org/t/converter-decimal-16-bits-to-uft-8/60883 "2022-04-06T17:17:46Z")

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Hi, I receive this array, it's a decimal 16 bits and I need to convert it to UFT-8 text It converted should show the date 06/04/22 How can I do this?

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## [Status code decoding / partition function](https://discourse.nodered.org/t/status-code-decoding-partition-function/60889)

<div class="topic-metadata">

**Author:** [@Rawpnzl](https://discourse.nodered.org/u/Rawpnzl)\
**Replies:** 4\
**Last updated:** [6 April 2022 17:05 UTC](https://discourse.nodered.org/t/status-code-decoding-partition-function/60889 "2022-04-06T17:05:45Z")

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Hello together, sorry for my bad english. In the past I could solve problems with Node Red by my own or with reading of this forum but at the moment I'm stuck with a problem or I don't see the obvious solution. I have …

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## [Node.send not always works](https://discourse.nodered.org/t/node-send-not-always-works/60615)

<div class="topic-metadata">

**Author:** [@cloud-rocket](https://discourse.nodered.org/u/cloud-rocket)\
**Replies:** 20\
**Last updated:** [6 April 2022 16:53 UTC](https://discourse.nodered.org/t/node-send-not-always-works/60615 "2022-04-06T16:53:27Z")

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I am developing a node that receives asynchronous messages from an external system through AMQP and sends the data to the developed node output. My external message function is triggered perfectly fine every time, but w…

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