# Latest

**URL:** https://discourse.nodered.org/latest.md?page=678

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

**Page:** 679

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## [Adding a dynamic amount of values to a JavaScript Object Property](https://discourse.nodered.org/t/adding-a-dynamic-amount-of-values-to-a-javascript-object-property/54806)

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**Author:** [@tfuchs1987](https://discourse.nodered.org/u/tfuchs1987)\
**Replies:** 4\
**Last updated:** [7 December 2021 18:10 UTC](https://discourse.nodered.org/t/adding-a-dynamic-amount-of-values-to-a-javascript-object-property/54806 "2021-12-07T18:10:16Z")

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Hi Guys, I am desperatly trying to add values to an object property. The API I want to communicate with needs all information delivered that way and the amount of values vary. msg.object = {property: {\[var1\] : "value1"…

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## [Hide / show groups in dashboard](https://discourse.nodered.org/t/hide-show-groups-in-dashboard/54681)

<div class="topic-metadata">

**Author:** [@standby82](https://discourse.nodered.org/u/standby82)\
**Replies:** 3\
**Last updated:** [7 December 2021 18:48 UTC](https://discourse.nodered.org/t/hide-show-groups-in-dashboard/54681 "2021-12-07T18:48:00Z")

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Hi, I'm new around here, but I've been using Node Red for a long time. This problem has arisen and I do not know if it has a solution or how to solve it. I have created a dashboard with 3 groups: Menu, Group\_A and Grou…

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## [Openplc on nodered](https://discourse.nodered.org/t/openplc-on-nodered/54662)

<div class="topic-metadata">

**Author:** [@pfe](https://discourse.nodered.org/u/pfe)\
**Replies:** 6\
**Last updated:** [7 December 2021 16:31 UTC](https://discourse.nodered.org/t/openplc-on-nodered/54662 "2021-12-07T16:31:38Z")

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Hello forum I want to use the openplc in node-red. Do someone use this component? I have now sone problem to install it . ( my installation of node-red is up todate).. Greetings

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## [Customizable Predictive Maintenance with NCD Long-Range Wireless Sensors](https://discourse.nodered.org/t/customizable-predictive-maintenance-with-ncd-long-range-wireless-sensors/54786)

<div class="topic-metadata">

**Author:** [@pacosta](https://discourse.nodered.org/u/pacosta)\
**Replies:** 0\
**Last updated:** [6 December 2021 18:50 UTC](https://discourse.nodered.org/t/customizable-predictive-maintenance-with-ncd-long-range-wireless-sensors/54786 "2021-12-06T18:50:35Z")

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Webinar announcement! On December 15 @ 12pm ET, explore how National Control Devices’ (NCD’s) industry-leading, long-range wireless sensors and Prescient Devices’ plug-and-play, customizable, and scalable predictive mai…

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## [Rbpi is showing wifi blocking on one of signal](https://discourse.nodered.org/t/rbpi-is-showing-wifi-blocking-on-one-of-signal/54811)

<div class="topic-metadata">

**Author:** [@aminulhaq](https://discourse.nodered.org/u/aminulhaq)\
**Replies:** 3\
**Last updated:** [7 December 2021 13:08 UTC](https://discourse.nodered.org/t/rbpi-is-showing-wifi-blocking-on-one-of-signal/54811 "2021-12-07T13:08:41Z")

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hi, i am using rbpi and when i click on wifi icon it shows list of signal some are active and my coperate wifi is dim black and cant click on it kindly see reference for understanding, how to solve the problem Thanks …

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## [Adding balena into the Node-RED getting started](https://discourse.nodered.org/t/adding-balena-into-the-node-red-getting-started/52753)

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**Author:** [@mpous](https://discourse.nodered.org/u/mpous)\
**Replies:** 4\
**Last updated:** [7 December 2021 11:33 UTC](https://discourse.nodered.org/t/adding-balena-into-the-node-red-getting-started/52753 "2021-12-07T11:33:51Z")

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Hello, following the contribution guidelines i would like to PR the documentation in order to add another way to install Node-RED on a Raspberry Pi or other devices compatible with balena (e.g. NVIDIA Jetson, Intel NUC, …

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## [Beginner - Sending mulitple AT commands in sequence to a serial interface (raspberry pi with USB dongle)](https://discourse.nodered.org/t/beginner-sending-mulitple-at-commands-in-sequence-to-a-serial-interface-raspberry-pi-with-usb-dongle/54789)

<div class="topic-metadata">

**Author:** [@JzzO](https://discourse.nodered.org/u/JzzO)\
**Replies:** 6\
**Last updated:** [7 December 2021 10:40 UTC](https://discourse.nodered.org/t/beginner-sending-mulitple-at-commands-in-sequence-to-a-serial-interface-raspberry-pi-with-usb-dongle/54789 "2021-12-07T10:40:47Z")

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Hi .. I am new to both Node-RED and the forum.. I am kind of stuck and hoping someone can send me in the right direction - Setup - Raspberry Pi 3 - LTE USB dongle Due to lack of internet in the house I am setting the …

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## [I am missing something here with message format - JSON](https://discourse.nodered.org/t/i-am-missing-something-here-with-message-format-json/54814)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 10\
**Last updated:** [7 December 2021 10:35 UTC](https://discourse.nodered.org/t/i-am-missing-something-here-with-message-format-json/54814 "2021-12-07T10:35:47Z")

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These are the 3 nodes: \[{"id":"a2b9b7d51d629336","type":"mqtt in","z":"d65ab744.465758","name":"","topic":"ARLEC-1/#","qos":"2","datatype":"auto","broker":"378c0403.8cda04","nl":false,"rap":true,"rh":0,"inputs":0,"x":81…

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## [How can i use the value of a variable i created inside the template node](https://discourse.nodered.org/t/how-can-i-use-the-value-of-a-variable-i-created-inside-the-template-node/54780)

<div class="topic-metadata">

**Author:** [@hanine](https://discourse.nodered.org/u/hanine)\
**Replies:** 32\
**Last updated:** [7 December 2021 10:31 UTC](https://discourse.nodered.org/t/how-can-i-use-the-value-of-a-variable-i-created-inside-the-template-node/54780 "2021-12-07T10:31:53Z")

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I am new to node red and i created a variable inside the template node and i want to use its content in another node how can i do that? thank you in advance

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## [Unable to query json data from http request](https://discourse.nodered.org/t/unable-to-query-json-data-from-http-request/54707)

<div class="topic-metadata">

**Author:** [@blob](https://discourse.nodered.org/u/blob)\
**Replies:** 28\
**Last updated:** [7 December 2021 10:19 UTC](https://discourse.nodered.org/t/unable-to-query-json-data-from-http-request/54707 "2021-12-07T10:19:46Z")

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Hi, We are trying to query json data acquired from GET http request. I want to use this json data as an API but we are unable to query particular data from the entire data (in json format) received from GET http reques…

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## [How to configure instructions in node document tab (subflow)](https://discourse.nodered.org/t/how-to-configure-instructions-in-node-document-tab-subflow/54803)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 13\
**Last updated:** [7 December 2021 09:56 UTC](https://discourse.nodered.org/t/how-to-configure-instructions-in-node-document-tab-subflow/54803 "2021-12-07T09:56:10Z")

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My hand's up. I don't know all the tricks. I know that you have to start the text with \*\* but then it is all blank. I want to write instructions to explain how to configure a subflow I am writing.

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## [3 arduino with sketch to node red with rpi](https://discourse.nodered.org/t/3-arduino-with-sketch-to-node-red-with-rpi/54767)

<div class="topic-metadata">

**Author:** [@azertym](https://discourse.nodered.org/u/azertym)\
**Replies:** 8\
**Last updated:** [7 December 2021 07:35 UTC](https://discourse.nodered.org/t/3-arduino-with-sketch-to-node-red-with-rpi/54767 "2021-12-07T07:35:36Z")

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Hi everybody. I need your help to make my project. In first i'm sorry. I'm french so my english is not very good. About my project. I work for an escape game and we want add interractivity. For this i use 3 arduino. …

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## [Running sudo from exec](https://discourse.nodered.org/t/running-sudo-from-exec/54787)

<div class="topic-metadata">

**Author:** [@nygma2004](https://discourse.nodered.org/u/nygma2004)\
**Replies:** 4\
**Last updated:** [7 December 2021 07:08 UTC](https://discourse.nodered.org/t/running-sudo-from-exec/54787 "2021-12-07T07:08:48Z")

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I think this is going to be generic Linux question, but I don't know the answer to it: I am setting up my new Node-Red server which is not a RaspberryPI, but a PC running Debian. Back in the Rpi days I used to run comma…

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## [Toggle node (subflow)](https://discourse.nodered.org/t/toggle-node-subflow/54804)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 8\
**Last updated:** [7 December 2021 06:27 UTC](https://discourse.nodered.org/t/toggle-node-subflow/54804 "2021-12-07T06:27:35Z")

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This is my effort at a node which could be handy for people who like flashy things on their dashboard. You want to make a light blink rather than just be constantly on. Though not complicated, this may save you some he…

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## [Ui-time-scheduler pre-select device from dropdown](https://discourse.nodered.org/t/ui-time-scheduler-pre-select-device-from-dropdown/53874)

<div class="topic-metadata">

**Author:** [@xjust](https://discourse.nodered.org/u/xjust)\
**Replies:** 25\
**Last updated:** [7 December 2021 05:51 UTC](https://discourse.nodered.org/t/ui-time-scheduler-pre-select-device-from-dropdown/53874 "2021-12-07T05:51:35Z")

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Can anybody help me change ui-time-scheduler dashboard to be able to pre-select a required device ? Similar to its enableDevice option that enables/disables the device. And similar to the standard dropdown dashboard wi…

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## [Full web OEE system with plc communication](https://discourse.nodered.org/t/full-web-oee-system-with-plc-communication/54799)

<div class="topic-metadata">

**Author:** [@vitormnm](https://discourse.nodered.org/u/vitormnm)\
**Replies:** 0\
**Last updated:** [6 December 2021 23:04 UTC](https://discourse.nodered.org/t/full-web-oee-system-with-plc-communication/54799 "2021-12-06T23:04:49Z")

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I just made a system made with a web interface using the standard nodes http(not red-dashboard), I used the mysql nodes and the communication node with plc(AB micrologix 1400). The performance looks good to me, I'm usin…

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## [Looking for a GUI to define Input for Schedex](https://discourse.nodered.org/t/looking-for-a-gui-to-define-input-for-schedex/8938)

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**Author:** [@Cowboy](https://discourse.nodered.org/u/Cowboy)\
**Replies:** 51\
**Last updated:** [6 December 2021 22:52 UTC](https://discourse.nodered.org/t/looking-for-a-gui-to-define-input-for-schedex/8938 "2021-12-06T22:52:58Z")

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Hi Guys, sry for my bad english, hopefully it is good enough. I'm new to Raspberry PI and Node-Red also. My plan is to build a schedule food automation for my animals for days where i have to go to work - mostly for 3 …

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## [Node-RED Glossary](https://discourse.nodered.org/t/node-red-glossary/54790)

<div class="topic-metadata">

**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 2\
**Last updated:** [6 December 2021 21:58 UTC](https://discourse.nodered.org/t/node-red-glossary/54790 "2021-12-06T21:58:45Z")

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Threw this together for a recent forum post. Not had any disagreement with what was written so I thought it would be useful to create a Glossary FAQ. Feel free, of course, to add/correct as needed. Nodes - in Node-RED …

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## [My video about the use of a 4-way zigbee switch, a zigbee2mqtt gateway, Node Red and a hybrid inverter](https://discourse.nodered.org/t/my-video-about-the-use-of-a-4-way-zigbee-switch-a-zigbee2mqtt-gateway-node-red-and-a-hybrid-inverter/54788)

<div class="topic-metadata">

**Author:** [@Jean-Luc](https://discourse.nodered.org/u/Jean-Luc)\
**Replies:** 5\
**Last updated:** [6 December 2021 21:51 UTC](https://discourse.nodered.org/t/my-video-about-the-use-of-a-4-way-zigbee-switch-a-zigbee2mqtt-gateway-node-red-and-a-hybrid-inverter/54788 "2021-12-06T21:51:06Z")

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I wanted to share a demo about the use of a 4-way zigbee switch, a zigbee2mqtt gateway, Node Red and a hybrid inverter. A telling example of what can be done with NR without any real programming knowledge. The wish of …

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## [Mad idea - link call type MQTT mechanism](https://discourse.nodered.org/t/mad-idea-link-call-type-mqtt-mechanism/53829)

<div class="topic-metadata">

**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 16\
**Last updated:** [6 December 2021 15:18 UTC](https://discourse.nodered.org/t/mad-idea-link-call-type-mqtt-mechanism/53829 "2021-12-06T15:18:27Z")

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Just while working on something and repeating something from another instance a (probably) daft thought struck me As well as the link call return thingy, why not do the same across instances (using MQTT??) e.g You want…

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## [Flows stopped due to missing node types. postgresDB](https://discourse.nodered.org/t/flows-stopped-due-to-missing-node-types-postgresdb/54778)

<div class="topic-metadata">

**Author:** [@Alessandra](https://discourse.nodered.org/u/Alessandra)\
**Replies:** 2\
**Last updated:** [6 December 2021 14:27 UTC](https://discourse.nodered.org/t/flows-stopped-due-to-missing-node-types-postgresdb/54778 "2021-12-06T14:27:58Z")

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I'm using node-red connected to PLC and saving to an influxdb database, I restarted the server and this error "Flows stopped due to missing node types. postgresDB" started to appear on node-red, could you help me?

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## [Energy Management](https://discourse.nodered.org/t/energy-management/54732)

<div class="topic-metadata">

**Author:** [@bjorningeo](https://discourse.nodered.org/u/bjorningeo)\
**Replies:** 2\
**Last updated:** [6 December 2021 14:19 UTC](https://discourse.nodered.org/t/energy-management/54732 "2021-12-06T14:19:43Z")

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Seaching for nodes for cost optimizing energy consumption in our home challenge there is high variation on electricity price during the day and from 1. of January there will aslo be introduced an aditional cost based o…

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## [How to mask a point in a path?](https://discourse.nodered.org/t/how-to-mask-a-point-in-a-path/54774)

<div class="topic-metadata">

**Author:** [@SN-8023](https://discourse.nodered.org/u/SN-8023)\
**Replies:** 3\
**Last updated:** [6 December 2021 12:16 UTC](https://discourse.nodered.org/t/how-to-mask-a-point-in-a-path/54774 "2021-12-06T12:16:49Z")

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I have a particle sensor under tasmota.... I get the payload in the format Payload:{"Time":"2021-12-06T10:53:53","BME280":{"Temperature":22.3,"Humidity":38.2,"DewPoint":7.4,"Pressure":997.8},"VINDRIKTNING":{"PM1":895,"P…

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## [How to send an initial MQTT message to get the status of a tasmota switch?](https://discourse.nodered.org/t/how-to-send-an-initial-mqtt-message-to-get-the-status-of-a-tasmota-switch/54721)

<div class="topic-metadata">

**Author:** [@belgah](https://discourse.nodered.org/u/belgah)\
**Replies:** 49\
**Last updated:** [6 December 2021 12:03 UTC](https://discourse.nodered.org/t/how-to-send-an-initial-mqtt-message-to-get-the-status-of-a-tasmota-switch/54721 "2021-12-06T12:03:31Z")

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Hi, I'm new to node red, but could at least implement a switch to a tasmota switch via MQTT. It worked after I change the switch. But due to the fact, that I've initially missed the last state, I'm searching for a mec…

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## [Help to sort by a column the data entered in node ui\_tablet](https://discourse.nodered.org/t/help-to-sort-by-a-column-the-data-entered-in-node-ui-tablet/54711)

<div class="topic-metadata">

**Author:** [@carflomi](https://discourse.nodered.org/u/carflomi)\
**Replies:** 2\
**Last updated:** [6 December 2021 11:35 UTC](https://discourse.nodered.org/t/help-to-sort-by-a-column-the-data-entered-in-node-ui-tablet/54711 "2021-12-06T11:35:39Z")

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Hello. I present you my problem I have a Ui\_tablet node that works great. . But I am not able to sort the data from newest to oldest (in the image you can see that the "Timestamp" field is sorted from oldest to newe…

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## [How do I dynamically change httpNodeAuth externally (setting.js)](https://discourse.nodered.org/t/how-do-i-dynamically-change-httpnodeauth-externally-setting-js/54665)

<div class="topic-metadata">

**Author:** [@sercancetin](https://discourse.nodered.org/u/sercancetin)\
**Replies:** 7\
**Last updated:** [6 December 2021 11:16 UTC](https://discourse.nodered.org/t/how-do-i-dynamically-change-httpnodeauth-externally-setting-js/54665 "2021-12-06T11:16:00Z")

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Hello to everyone. How do I dynamically change httpNodeAuth externally (setting.js). The scenario is: The customer will edit the setting.js file via the form on the browser without manually changing it. Maybe it has not…

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## [\`link call\` node. Stuck](https://discourse.nodered.org/t/link-call-node-stuck/54763)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 4\
**Last updated:** [6 December 2021 10:21 UTC](https://discourse.nodered.org/t/link-call-node-stuck/54763 "2021-12-06T10:21:59Z")

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I am not understanding how to use it. Alas looking in the import/examples there aren't any. Could someone show me how to use it? I'm missing something. All I can manage is link - in --\> link - call --\> link - out Bu…

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## [Trigger a flow when a dumb external CD player starts playing](https://discourse.nodered.org/t/trigger-a-flow-when-a-dumb-external-cd-player-starts-playing/54611)

<div class="topic-metadata">

**Author:** [@HonestJohn61](https://discourse.nodered.org/u/HonestJohn61)\
**Replies:** 19\
**Last updated:** [6 December 2021 10:19 UTC](https://discourse.nodered.org/t/trigger-a-flow-when-a-dumb-external-cd-player-starts-playing/54611 "2021-12-06T10:19:50Z")

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This is a long shot ... but there may be someone who has done something like this before. I have an ancient CD player which my wife likes to use. I'd like to be able to detect when it starts playing to trigger a flow I …

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## [How sort data into ui\_dropdown](https://discourse.nodered.org/t/how-sort-data-into-ui-dropdown/54750)

<div class="topic-metadata">

**Author:** [@Geppy57](https://discourse.nodered.org/u/Geppy57)\
**Replies:** 2\
**Last updated:** [6 December 2021 09:27 UTC](https://discourse.nodered.org/t/how-sort-data-into-ui-dropdown/54750 "2021-12-06T09:27:10Z")

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Hi all. A simple question. There is a simple way to sort data into ui\_dropdown node? I store files hourly in order to view historical charts. The files are named by date and time. To select file I put a ui\_dropdown …

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## [SOLVED - Server error when using mobile devices](https://discourse.nodered.org/t/solved-server-error-when-using-mobile-devices/54740)

<div class="topic-metadata">

**Author:** [@sneakynuts](https://discourse.nodered.org/u/sneakynuts)\
**Replies:** 3\
**Last updated:** [6 December 2021 09:15 UTC](https://discourse.nodered.org/t/solved-server-error-when-using-mobile-devices/54740 "2021-12-06T09:15:11Z")

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I have a strange issue i cant sus out. When i navigate to Node Red using my mobile devices, i get a error message saying cant connect to server, try again in x seconds. But when i'm on my pc, i ahve no issues - So can'…

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