# Latest

**URL:** https://discourse.nodered.org/latest.md?page=571

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

**Page:** 572

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## [Controlling Relay using mqtt](https://discourse.nodered.org/t/controlling-relay-using-mqtt/62459)

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**Author:** [@rolandoartha](https://discourse.nodered.org/u/rolandoartha)\
**Replies:** 3\
**Last updated:** [11 May 2022 16:37 UTC](https://discourse.nodered.org/t/controlling-relay-using-mqtt/62459 "2022-05-11T16:37:18Z")

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hello guys, i want to control my relay by mqtt broker, it's already subcribe the data from Soil Moisture Sensor, but the relay is always off this is the logic i use this is the callback function void mqttCallback(…

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## [Curl --unix-socket in node-red?](https://discourse.nodered.org/t/curl-unix-socket-in-node-red/62488)

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**Author:** [@bakman2](https://discourse.nodered.org/u/bakman2)\
**Replies:** 5\
**Last updated:** [11 May 2022 16:17 UTC](https://discourse.nodered.org/t/curl-unix-socket-in-node-red/62488 "2022-05-11T16:17:35Z")

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I am trying to reinvent the "portainer" wheel by creating my own docker container manager in node-red. Docker engine has an API that can be called by using something like: curl --unix-socket /var/run/docker.sock http:/…

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## [OPC UA connection timeout/error | catch node](https://discourse.nodered.org/t/opc-ua-connection-timeout-error-catch-node/62511)

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**Author:** [@learnobyte](https://discourse.nodered.org/u/learnobyte)\
**Replies:** 8\
**Last updated:** [11 May 2022 15:33 UTC](https://discourse.nodered.org/t/opc-ua-connection-timeout-error-catch-node/62511 "2022-05-11T15:33:07Z")

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Hi, I need to display a message in the dashboard when the OPC UA server is down/not connected. I have used "catch" node, not catching the error, still not displaying the connection time out error in debug window. …

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## [Mutiple outputs if statement](https://discourse.nodered.org/t/mutiple-outputs-if-statement/62515)

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**Author:** [@Subsony](https://discourse.nodered.org/u/Subsony)\
**Replies:** 2\
**Last updated:** [11 May 2022 15:25 UTC](https://discourse.nodered.org/t/mutiple-outputs-if-statement/62515 "2022-05-11T15:25:20Z")

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Hey guys! Im on my first jurney on Java an Node Red and have experienced actually some nice stuff. But actually im stuck and the documentation dont answer my quenstions or i dont understand it. I want to split one if s…

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## [Monitoring Email Connection Status](https://discourse.nodered.org/t/monitoring-email-connection-status/62479)

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**Author:** [@als7](https://discourse.nodered.org/u/als7)\
**Replies:** 2\
**Last updated:** [11 May 2022 13:42 UTC](https://discourse.nodered.org/t/monitoring-email-connection-status/62479 "2022-05-11T13:42:09Z")

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Hi there, I need to find a way to monitor the email in node (from node-red-node-email) to see if the node is still connected or having connection problems and if it is disconnected, to send me an alert. One of the prob…

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## [Subflow variables](https://discourse.nodered.org/t/subflow-variables/62505)

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**Author:** [@sfedo](https://discourse.nodered.org/u/sfedo)\
**Replies:** 8\
**Last updated:** [11 May 2022 13:32 UTC](https://discourse.nodered.org/t/subflow-variables/62505 "2022-05-11T13:32:34Z")

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I'm using subflow in my node-red with one env-variable. if i use the variable individually, then it works: But when I use them inside another String, it doenst work anymore. is there a workaround or a solution for …

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## [Unable to install Telegram palette on Node-Red](https://discourse.nodered.org/t/unable-to-install-telegram-palette-on-node-red/62489)

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**Author:** [@Kaij3](https://discourse.nodered.org/u/Kaij3)\
**Replies:** 1\
**Last updated:** [11 May 2022 13:03 UTC](https://discourse.nodered.org/t/unable-to-install-telegram-palette-on-node-red/62489 "2022-05-11T13:03:03Z")

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Hello! Trying to install telegram bot using Node red palette, i am using Node-red snap version 2.2. This is the error i encountered trying to install it. ----------------------------------------------------------- 202…

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## [Upload file to SQL table](https://discourse.nodered.org/t/upload-file-to-sql-table/62440)

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**Author:** [@QGIO](https://discourse.nodered.org/u/QGIO)\
**Replies:** 13\
**Last updated:** [11 May 2022 12:58 UTC](https://discourse.nodered.org/t/upload-file-to-sql-table/62440 "2022-05-11T12:58:57Z")

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Continuing the discussion from How to upload pdf file to sql sever: I don't see any solution for this post or Ican't found it. Do you have suggestion?

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## [Determine default context store](https://discourse.nodered.org/t/determine-default-context-store/62508)

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**Author:** [@danube](https://discourse.nodered.org/u/danube)\
**Replies:** 0\
**Last updated:** [11 May 2022 12:34 UTC](https://discourse.nodered.org/t/determine-default-context-store/62508 "2022-05-11T12:34:40Z")

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I wonder how to determine the value of default context store? Is there an api call? A specific node I'm developing should warn the user, if default store is memory instead of localfilesystem.

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## [\[new user\] Blank screen upon starting node-red](https://discourse.nodered.org/t/new-user-blank-screen-upon-starting-node-red/62425)

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**Author:** [@Razz](https://discourse.nodered.org/u/Razz)\
**Replies:** 15\
**Last updated:** [11 May 2022 12:20 UTC](https://discourse.nodered.org/t/new-user-blank-screen-upon-starting-node-red/62425 "2022-05-11T12:20:26Z")

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Upon starting node-red, it comes out to be a blank page. Fairly new with little knowledge on OS, help please!. pi@raspberrypi:~ $ node-red-start Start Node-RED Once Node-RED has started, point a browser at 192.168…

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## [How to choose values out of one object and combine to new object?](https://discourse.nodered.org/t/how-to-choose-values-out-of-one-object-and-combine-to-new-object/62499)

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**Author:** [@sfedo](https://discourse.nodered.org/u/sfedo)\
**Replies:** 4\
**Last updated:** [11 May 2022 11:27 UTC](https://discourse.nodered.org/t/how-to-choose-values-out-of-one-object-and-combine-to-new-object/62499 "2022-05-11T11:27:15Z")

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Hello everyone, I create an object with different topic and combine it with join node. It works very well. Now I read this object and would like to pick only 3 values and create new object. This is how my read looks l…

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## [Drag and move feature in layout editor,is not working](https://discourse.nodered.org/t/drag-and-move-feature-in-layout-editor-is-not-working/62504)

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**Author:** [@bilel](https://discourse.nodered.org/u/bilel)\
**Replies:** 0\
**Last updated:** [11 May 2022 11:10 UTC](https://discourse.nodered.org/t/drag-and-move-feature-in-layout-editor-is-not-working/62504 "2022-05-11T11:10:41Z")

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## [" Uncaught ReferenceError: io is not defined error " getting in reactjs app with node-red uibuilder backend](https://discourse.nodered.org/t/uncaught-referenceerror-io-is-not-defined-error-getting-in-reactjs-app-with-node-red-uibuilder-backend/62470)

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**Author:** [@noob69](https://discourse.nodered.org/u/noob69)\
**Replies:** 3\
**Last updated:** [11 May 2022 08:38 UTC](https://discourse.nodered.org/t/uncaught-referenceerror-io-is-not-defined-error-getting-in-reactjs-app-with-node-red-uibuilder-backend/62470 "2022-05-11T08:38:38Z")

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I'm getting Uncaught ReferenceError: io is not defined error when running a reactjs app with the node-red ui builder backend. I've configured nodeserver in index.html but the error keeps getting thrown. my index.html co…

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## [Looking for node help timing](https://discourse.nodered.org/t/looking-for-node-help-timing/62491)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 7\
**Last updated:** [11 May 2022 07:15 UTC](https://discourse.nodered.org/t/looking-for-node-help-timing/62491 "2022-05-11T07:15:18Z")

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(I am cursed with this scenario that if I don't ask I will remain stuck but if I do ask, it increases the chances I work it out myself.) Requirement: Messages received. If two are received within a given time it sends …

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## [Joining 2 buffer payloads in java script](https://discourse.nodered.org/t/joining-2-buffer-payloads-in-java-script/62483)

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**Author:** [@Mick](https://discourse.nodered.org/u/Mick)\
**Replies:** 6\
**Last updated:** [10 May 2022 23:47 UTC](https://discourse.nodered.org/t/joining-2-buffer-payloads-in-java-script/62483 "2022-05-10T23:47:49Z")

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I am trying to duplicate the join node in javascript as a learning exercise. I am trying to join a payload consisting of 2 buffers. I have a test env of: My function node is: var a= Buffer.from(msg.payload); var …

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## [Reinicio de flujo para reconexión de servidor Modbus TCP/IP - Flow restart for Modbus TCP/IP server reconnection](https://discourse.nodered.org/t/reinicio-de-flujo-para-reconexion-de-servidor-modbus-tcp-ip-flow-restart-for-modbus-tcp-ip-server-reconnection/62466)

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**Author:** [@Jara129](https://discourse.nodered.org/u/Jara129)\
**Replies:** 0\
**Last updated:** [10 May 2022 17:39 UTC](https://discourse.nodered.org/t/reinicio-de-flujo-para-reconexion-de-servidor-modbus-tcp-ip-flow-restart-for-modbus-tcp-ip-server-reconnection/62466 "2022-05-10T17:39:09Z")

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Buenas tardes comunidad, tengo un inconveniente con la reconexión del servidor modbus tcp/ip, estoy utilizando un adquisidor de datos con node red incluido, pero a la hora que el equipo(maquina de dosificar sobres) que c…

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## [S3 compatible storage](https://discourse.nodered.org/t/s3-compatible-storage/62467)

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**Author:** [@Miguel](https://discourse.nodered.org/u/Miguel)\
**Replies:** 1\
**Last updated:** [10 May 2022 22:25 UTC](https://discourse.nodered.org/t/s3-compatible-storage/62467 "2022-05-10T22:25:11Z")

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I've searched a lot but couldn't find the right node to connect to a non-aws s3 compatible storage. Would it be possible to give an option to specify the endpoint being able to use S3 compatible storage, and not only aw…

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## [Node red dashboard 3.1.7](https://discourse.nodered.org/t/node-red-dashboard-3-1-7/62456)

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**Author:** [@kelvo763](https://discourse.nodered.org/u/kelvo763)\
**Replies:** 3\
**Last updated:** [10 May 2022 21:36 UTC](https://discourse.nodered.org/t/node-red-dashboard-3-1-7/62456 "2022-05-10T21:36:31Z")

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Hi, I have upgraded my dashboard node from version 2.25.0 to version 3.17 and all my UIs no longer work. The buttons for example no longer appear on the dashboard and I can't group them either. Any ideas??

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## [Compare 2 strings values](https://discourse.nodered.org/t/compare-2-strings-values/62475)

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**Author:** [@Stergios96](https://discourse.nodered.org/u/Stergios96)\
**Replies:** 1\
**Last updated:** [10 May 2022 21:07 UTC](https://discourse.nodered.org/t/compare-2-strings-values/62475 "2022-05-10T21:07:20Z")

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Hello! i would like to compare 2 scores. Below there is the flow and settings. Is any way to compare strings values? Thanks in advance!

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## [Node-red-contrib-whatsapp-messagebird does not work](https://discourse.nodered.org/t/node-red-contrib-whatsapp-messagebird-does-not-work/62474)

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**Author:** [@Difean98](https://discourse.nodered.org/u/Difean98)\
**Replies:** 3\
**Last updated:** [10 May 2022 21:19 UTC](https://discourse.nodered.org/t/node-red-contrib-whatsapp-messagebird-does-not-work/62474 "2022-05-10T21:19:17Z")

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I'm trying to use the whatsapp-messagebird-send node with this data format but it doesn't work, I already created a whatsapp channel in messagebird and put my API key but not work msg.payload={"params":{ "channelId": "…

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## [Cant find my project](https://discourse.nodered.org/t/cant-find-my-project/62476)

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**Author:** [@bilel](https://discourse.nodered.org/u/bilel)\
**Replies:** 0\
**Last updated:** [10 May 2022 21:03 UTC](https://discourse.nodered.org/t/cant-find-my-project/62476 "2022-05-10T21:03:57Z")

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hello, i just finish a project on ned red after a weak without using i return for a check but didnt find my work . there is any solution to bring it back ?

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## [Having to reboot RPi after node update](https://discourse.nodered.org/t/having-to-reboot-rpi-after-node-update/62461)

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**Author:** [@k5map](https://discourse.nodered.org/u/k5map)\
**Replies:** 3\
**Last updated:** [10 May 2022 19:19 UTC](https://discourse.nodered.org/t/having-to-reboot-rpi-after-node-update/62461 "2022-05-10T19:19:35Z")

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When I update any of my installed nodes, I get the message I must restart Node-Red in order for the update to take effort. Ok, no problem so I got and issue "node-red restart" (or do stop then start) but it does not mat…

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## [\[ANNOUNCE\]node-red-contrib-ui-svg : pan & zoom (beta)](https://discourse.nodered.org/t/announce-node-red-contrib-ui-svg-pan-zoom-beta/19729)

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**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 10\
**Last updated:** [28 June 2020 22:07 UTC](https://discourse.nodered.org/t/announce-node-red-contrib-ui-svg-pan-zoom-beta/19729 "2020-06-28T22:07:33Z")

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Hi folks, Trying to publish all my nearly-completed-stuff as soon as possible. Here the next one ... Got a feature request recently to have pan and zoom functionality in the node-red-contrib-ui-svg node. This might i…

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## [Get name of configuration node](https://discourse.nodered.org/t/get-name-of-configuration-node/62407)

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**Author:** [@Blovorad](https://discourse.nodered.org/u/Blovorad)\
**Replies:** 3\
**Last updated:** [10 May 2022 19:17 UTC](https://discourse.nodered.org/t/get-name-of-configuration-node/62407 "2022-05-10T19:17:04Z")

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Hello, i will try to explain my idea. I don't know if it is possible but when you have configuration node i want to know if i can, with function node or other, get the name of the configuration node. You can look on thi…

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## [Plotting array wont work](https://discourse.nodered.org/t/plotting-array-wont-work/62471)

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**Author:** [@Olivia](https://discourse.nodered.org/u/Olivia)\
**Replies:** 4\
**Last updated:** [10 May 2022 19:02 UTC](https://discourse.nodered.org/t/plotting-array-wont-work/62471 "2022-05-10T19:02:46Z")

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Hello everyone, i am trying to plot this array (which i think is correct) but it wont work... \[{"series":\["Frequentie","Totaal\_Vermogen","Spanning\_L1","Spanning\_L2","Spanning\_L3","Stroom\_L1net","Stroom\_L2net","Stroom\_L…

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## [Model railway turntable automatic Indexing](https://discourse.nodered.org/t/model-railway-turntable-automatic-indexing/62458)

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**Author:** [@Mrb32](https://discourse.nodered.org/u/Mrb32)\
**Replies:** 6\
**Last updated:** [10 May 2022 18:50 UTC](https://discourse.nodered.org/t/model-railway-turntable-automatic-indexing/62458 "2022-05-10T18:50:11Z")

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Hello all, I have posted a few times (here ) about a little model train control application I put together with Nodered, ESP8266, Tasmota, MQTT and a PI4. It is designed to control vintage (30++ year old) Märklin acces…

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## [Help with messaging on sqlite DB to dashboard chart](https://discourse.nodered.org/t/help-with-messaging-on-sqlite-db-to-dashboard-chart/62309)

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**Author:** [@NRdiscrs9393](https://discourse.nodered.org/u/NRdiscrs9393)\
**Replies:** 10\
**Last updated:** [10 May 2022 17:16 UTC](https://discourse.nodered.org/t/help-with-messaging-on-sqlite-db-to-dashboard-chart/62309 "2022-05-10T17:16:14Z")

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Hello, I'm looking for help to resolve the "Bad data inject" error when trying to pull from the sqllite node to the Chart node of the attached flow. My thought is that the array is putting out a 0: and 1: instead of x: …

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## [Add checkbox to default the MQTT node name to broker name](https://discourse.nodered.org/t/add-checkbox-to-default-the-mqtt-node-name-to-broker-name/62444)

<div class="topic-metadata">

**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 31\
**Last updated:** [10 May 2022 16:43 UTC](https://discourse.nodered.org/t/add-checkbox-to-default-the-mqtt-node-name-to-broker-name/62444 "2022-05-10T16:43:42Z")

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But I can see that changing the default automatically to be broker name would muck up some peoples existing flows visually so that's why I'm suggesting adding a checkbox

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## [Nrlint is not working](https://discourse.nodered.org/t/nrlint-is-not-working/62359)

<div class="topic-metadata">

**Author:** [@Nobbody](https://discourse.nodered.org/u/Nobbody)\
**Replies:** 2\
**Last updated:** [10 May 2022 16:21 UTC](https://discourse.nodered.org/t/nrlint-is-not-working/62359 "2022-05-10T16:21:48Z")

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I installed the nrlint linker. Then create the default file: npx nrlint --init \> .nrlintrc.js Then modify the setting.js: module.exports { // Add a nrlint entry pointing to your nrlint config file nrlint: re…

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## [Node-Red-Influxdb with Shelly 3EM](https://discourse.nodered.org/t/node-red-influxdb-with-shelly-3em/62449)

<div class="topic-metadata">

**Author:** [@mdd](https://discourse.nodered.org/u/mdd)\
**Replies:** 1\
**Last updated:** [10 May 2022 15:29 UTC](https://discourse.nodered.org/t/node-red-influxdb-with-shelly-3em/62449 "2022-05-10T15:29:52Z")

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Hello, I use Node-Red with the Shelly 3 EM energy meter. I can display the data in the dashboard via MQTT. Question/ Problem: I write the data to the Influx DB database every 3 seconds. I can then read them via: query …

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