# Latest

**URL:** https://discourse.nodered.org/latest.md?page=874

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

**Page:** 875

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## [How to program Pulse Width Modulation on a Unipi Neuron S103](https://discourse.nodered.org/t/how-to-program-pulse-width-modulation-on-a-unipi-neuron-s103/41727)

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**Author:** [@Jeff](https://discourse.nodered.org/u/Jeff)\
**Replies:** 0\
**Last updated:** [27 February 2021 18:01 UTC](https://discourse.nodered.org/t/how-to-program-pulse-width-modulation-on-a-unipi-neuron-s103/41727 "2021-02-27T18:01:56Z")

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I'm new here and Node-RED is new for me. I installed Node-RED on a Unipi Neuron S103 (raspberry pi inside) and I want do dim an electrical heater. I want to send short pulses to a solid state relais. Writing it myself in…

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## [Logic nodes with multiple inputs?](https://discourse.nodered.org/t/logic-nodes-with-multiple-inputs/41692)

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**Author:** [@daxliniere](https://discourse.nodered.org/u/daxliniere)\
**Replies:** 7\
**Last updated:** [27 February 2021 17:13 UTC](https://discourse.nodered.org/t/logic-nodes-with-multiple-inputs/41692 "2021-02-27T17:13:59Z")

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I couldn't seem to find any logic gate nodes (AND/OR) that have multiple input pins. I feel like I have missed something, because I know that NR is extremely powerful and flexible, so I'm guessing there's a way to do so…

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## [Node-red-contrib-voice2json](https://discourse.nodered.org/t/node-red-contrib-voice2json/37925)

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**Author:** [@pvklink](https://discourse.nodered.org/u/pvklink)\
**Replies:** 30\
**Last updated:** [27 February 2021 15:46 UTC](https://discourse.nodered.org/t/node-red-contrib-voice2json/37925 "2021-02-27T15:46:19Z")

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Hi, i tried to install this node on my rpi 3b with the latest node-red and the latest rpi os. I installed npm install johanneskropf/node-red-contrib-voice2json sudo apt install ./voice2json\_2.0\_armhf.deb tar -zxvf en-…

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## [REsizing the dashboard according to the screen](https://discourse.nodered.org/t/resizing-the-dashboard-according-to-the-screen/41679)

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**Author:** [@Fenix999](https://discourse.nodered.org/u/Fenix999)\
**Replies:** 1\
**Last updated:** [27 February 2021 15:15 UTC](https://discourse.nodered.org/t/resizing-the-dashboard-according-to-the-screen/41679 "2021-02-27T15:15:00Z")

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Hello i am new with Node-Red.. i create a dashboard that is working fine so far i am looking for any feature that will adjust - resize the dashboard according to the screen screen should fix on a desktop or a iphone…

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## [Waiting for missing types to be registered: - onvif-config](https://discourse.nodered.org/t/waiting-for-missing-types-to-be-registered-onvif-config/41715)

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**Author:** [@essability](https://discourse.nodered.org/u/essability)\
**Replies:** 2\
**Last updated:** [27 February 2021 14:59 UTC](https://discourse.nodered.org/t/waiting-for-missing-types-to-be-registered-onvif-config/41715 "2021-02-27T14:59:19Z")

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Hello, I currently have a problem with my node-red application. Flows stopped due to missing node types. onvif-config Close 27 Feb 14:29:11 - \[info\] Waiting for missing types to be registered: 27 Feb 14:29:11 - \[in…

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## [Inject 20 times with 1 sec intervals](https://discourse.nodered.org/t/inject-20-times-with-1-sec-intervals/41714)

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**Author:** [@Benja](https://discourse.nodered.org/u/Benja)\
**Replies:** 8\
**Last updated:** [27 February 2021 14:34 UTC](https://discourse.nodered.org/t/inject-20-times-with-1-sec-intervals/41714 "2021-02-27T14:34:09Z")

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Is there a way to trigger an inject 20 times with 1 sec intervals?

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## [Bacnet addressing mstp through ip router](https://discourse.nodered.org/t/bacnet-addressing-mstp-through-ip-router/34979)

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**Author:** [@afssElite](https://discourse.nodered.org/u/afssElite)\
**Replies:** 10\
**Last updated:** [27 February 2021 14:22 UTC](https://discourse.nodered.org/t/bacnet-addressing-mstp-through-ip-router/34979 "2021-02-27T14:22:34Z")

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I am developing a ui for a bacnet network on a single subnet: 10.252.252.24/24 is the ip of the bacnet ip mstp router. I have 1 mstp device on mac address 1, mstp network number 3, mac address of router is 0, router devi…

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## [Help with creating a new node with c++](https://discourse.nodered.org/t/help-with-creating-a-new-node-with-c/41713)

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**Author:** [@theo481](https://discourse.nodered.org/u/theo481)\
**Replies:** 3\
**Last updated:** [27 February 2021 14:09 UTC](https://discourse.nodered.org/t/help-with-creating-a-new-node-with-c/41713 "2021-02-27T14:09:36Z")

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Hi everyone, Still being quite new ( with node-red, node.js and javascript in general) so understanding code online is not easy; I was therefore hoping to find some help over her. I wrote some code in c++, that I manag…

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## [Subtract 2 functions](https://discourse.nodered.org/t/subtract-2-functions/41711)

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**Author:** [@Bos1982](https://discourse.nodered.org/u/Bos1982)\
**Replies:** 5\
**Last updated:** [27 February 2021 11:06 UTC](https://discourse.nodered.org/t/subtract-2-functions/41711 "2021-02-27T11:06:10Z")

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So I’m new to this forum and rather new to Node-Red. I’m struggling with the following.. I would likely subtract 2 functions. I have come quite far but now really get stuck. The whole idea is to “ Input a function” an…

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## [How to add recaptchaV3 to nodered notification dialog?](https://discourse.nodered.org/t/how-to-add-recaptchav3-to-nodered-notification-dialog/41712)

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**Author:** [@bigboxth](https://discourse.nodered.org/u/bigboxth)\
**Replies:** 0\
**Last updated:** [27 February 2021 10:45 UTC](https://discourse.nodered.org/t/how-to-add-recaptchav3-to-nodered-notification-dialog/41712 "2021-02-27T10:45:09Z")

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I want to add recaptchaV3 to notification dialog with angular template , please help .

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## [node red not opening](https://discourse.nodered.org/t/node-red-not-opening/41706)

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**Author:** [@Razr](https://discourse.nodered.org/u/Razr)\
**Replies:** 2\
**Last updated:** [27 February 2021 08:39 UTC](https://discourse.nodered.org/t/node-red-not-opening/41706 "2021-02-27T08:39:11Z")

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Welcome to Node-RED 27 Feb 13:20:41 - \[info\] Node-RED version: v1.2.9 27 Feb 13:20:41 - \[info\] Node.js version: v10.23.1 27 Feb 13:20:41 - \[info\] Linux 5.10.11+ arm LE 27 Feb 13:21:01 - \[info\] Loading palette nodes …

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## [Adding variable values](https://discourse.nodered.org/t/adding-variable-values/41705)

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**Author:** [@little\_rich](https://discourse.nodered.org/u/little_rich)\
**Replies:** 2\
**Last updated:** [27 February 2021 08:37 UTC](https://discourse.nodered.org/t/adding-variable-values/41705 "2021-02-27T08:37:13Z")

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I have struggled all afternoon with something which shouldn't be hard. Have had a look around and seen some similar queries but not quite the same. My problem is I am trying to add two variables together but the answer…

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## [Blocklly node in node red?](https://discourse.nodered.org/t/blocklly-node-in-node-red/41696)

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**Author:** [@franzda](https://discourse.nodered.org/u/franzda)\
**Replies:** 2\
**Last updated:** [27 February 2021 06:18 UTC](https://discourse.nodered.org/t/blocklly-node-in-node-red/41696 "2021-02-27T06:18:26Z")

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I have probably overlooked or misunderstood something: Where can I find "blockly node" to create graphical functions in node red. I did the installation already sudo npm install node-red-contrib-blockly

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## [Disabling flows during startup](https://discourse.nodered.org/t/disabling-flows-during-startup/41355)

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**Author:** [@augjoh](https://discourse.nodered.org/u/augjoh)\
**Replies:** 5\
**Last updated:** [27 February 2021 06:16 UTC](https://discourse.nodered.org/t/disabling-flows-during-startup/41355 "2021-02-27T06:16:40Z")

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Hello everybody, I'm running a Node-RED project with mutliple flows. I would like to enable/disable some flows during startup. I've seen, that this is possible using the admin web interface. Is this possible using setti…

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## [Rotate the dashboard](https://discourse.nodered.org/t/rotate-the-dashboard/41607)

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**Author:** [@bird](https://discourse.nodered.org/u/bird)\
**Replies:** 2\
**Last updated:** [27 February 2021 02:22 UTC](https://discourse.nodered.org/t/rotate-the-dashboard/41607 "2021-02-27T02:22:55Z")

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Hi I want to show specific dashboards on a rotating screen every 3 seconds. For example, I want to show the camera dashboard and show the sensor dashboard after 3 seconds. I want to repeat this. How should it be con…

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## [Visualization of data](https://discourse.nodered.org/t/visualization-of-data/41639)

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**Author:** [@bkenobi](https://discourse.nodered.org/u/bkenobi)\
**Replies:** 20\
**Last updated:** [26 February 2021 22:17 UTC](https://discourse.nodered.org/t/visualization-of-data/41639 "2021-02-26T22:17:16Z")

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I know there is the NR Dashboard available but to date I have been experimenting with Grafana. I'm not completely happy with the way data is visualized and thought perhaps I should step back and see if others are using …

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## [Creating custom node and the getting accesstoken and then making api call on single custom node](https://discourse.nodered.org/t/creating-custom-node-and-the-getting-accesstoken-and-then-making-api-call-on-single-custom-node/41605)

<div class="topic-metadata">

**Author:** [@Sudthakur](https://discourse.nodered.org/u/Sudthakur)\
**Replies:** 4\
**Last updated:** [26 February 2021 21:14 UTC](https://discourse.nodered.org/t/creating-custom-node-and-the-getting-accesstoken-and-then-making-api-call-on-single-custom-node/41605 "2021-02-26T21:14:46Z")

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Hello, I created the custom node called getMachines where I will be supplying the ClientId and ClientSecret in input of the node. And after that i will be accessing the accessToken to get the API data. After that on …

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## [Issues trying to install on new Pi 4](https://discourse.nodered.org/t/issues-trying-to-install-on-new-pi-4/41485)

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**Author:** [@Industrialogics](https://discourse.nodered.org/u/Industrialogics)\
**Replies:** 15\
**Last updated:** [26 February 2021 21:09 UTC](https://discourse.nodered.org/t/issues-trying-to-install-on-new-pi-4/41485 "2021-02-26T21:09:58Z")

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It says successfully loaded, but I cannot start either from window or Programming-Node-Red at VNC... What am I doing wrong?

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## [Only pass True if input is true for X seconds](https://discourse.nodered.org/t/only-pass-true-if-input-is-true-for-x-seconds/41657)

<div class="topic-metadata">

**Author:** [@daxliniere](https://discourse.nodered.org/u/daxliniere)\
**Replies:** 18\
**Last updated:** [26 February 2021 21:01 UTC](https://discourse.nodered.org/t/only-pass-true-if-input-is-true-for-x-seconds/41657 "2021-02-26T21:01:58Z")

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Hey all, I'm relatively new to NR, but absolutely LOVING it. I'm working on a flow which will let me know if a cupboard has been left open. The input is a reed switch connected to a RPi GPIO pin (this is working), the …

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## [Thanks to all helping user here in forum](https://discourse.nodered.org/t/thanks-to-all-helping-user-here-in-forum/41690)

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**Author:** [@iiot2k](https://discourse.nodered.org/u/iiot2k)\
**Replies:** 0\
**Last updated:** [26 February 2021 19:39 UTC](https://discourse.nodered.org/t/thanks-to-all-helping-user-here-in-forum/41690 "2021-02-26T19:39:14Z")

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Very thanks to all helping users here. :trophy: They spend her free time to solve our problems in Node-Red. :sweat: Sometimes they show a lot of patience for our stupid questions. :roll\_eyes: @knolleary @Steve-Mcl @…

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## [How to add key/value of json object by node change](https://discourse.nodered.org/t/how-to-add-key-value-of-json-object-by-node-change/41662)

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**Author:** [@minhhn0205](https://discourse.nodered.org/u/minhhn0205)\
**Replies:** 4\
**Last updated:** [26 February 2021 20:28 UTC](https://discourse.nodered.org/t/how-to-add-key-value-of-json-object-by-node-change/41662 "2021-02-26T20:28:27Z")

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Hi, I would like to add key/value to the json object, I have done it using the function node. \[{"id":"828012fb.ba609","type":"tab","label":"フロー 1","disabled":false,"info":""},{"id":"b7825fef.5e89","type":"inject","z"…

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## [UI Dropdown - How to select / deselect all?](https://discourse.nodered.org/t/ui-dropdown-how-to-select-deselect-all/41575)

<div class="topic-metadata">

**Author:** [@relic](https://discourse.nodered.org/u/relic)\
**Replies:** 10\
**Last updated:** [26 February 2021 20:21 UTC](https://discourse.nodered.org/t/ui-dropdown-how-to-select-deselect-all/41575 "2021-02-26T20:21:34Z")

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Hi there, I'm trying to find a convenient way to add a 'Select all / Deselect all' for UI\_Dropdown. So far I'm stuck on multiple Google searches with no answer. I'm guessing that I should use the 'template' node but I …

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## [Help with a function](https://discourse.nodered.org/t/help-with-a-function/41686)

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**Author:** [@877](https://discourse.nodered.org/u/877)\
**Replies:** 2\
**Last updated:** [26 February 2021 19:16 UTC](https://discourse.nodered.org/t/help-with-a-function/41686 "2021-02-26T19:16:48Z")

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I would like to write a function that does the following: Filters messages from topic zigbee2mqtt/Hue\_dimmer\_main\_bedroom on payload.action = "off\_press" For each matching received message, the function sends one of …

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## [Node-red-contrib-opcua](https://discourse.nodered.org/t/node-red-contrib-opcua/41688)

<div class="topic-metadata">

**Author:** [@CesSifu](https://discourse.nodered.org/u/CesSifu)\
**Replies:** 0\
**Last updated:** [26 February 2021 17:51 UTC](https://discourse.nodered.org/t/node-red-contrib-opcua/41688 "2021-02-26T17:51:29Z")

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HI! I'm trying to use the "node-red-contrib-opcua", but I'm having an issue. Versions: Node red - v1.2.9 Node JS - v14.16.0 I'm able to configure the OPC UA server, I connect to the server with the UAEXPERT, everyt…

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## [NodeRED crashed after var undefined](https://discourse.nodered.org/t/nodered-crashed-after-var-undefined/41683)

<div class="topic-metadata">

**Author:** [@nicedevil](https://discourse.nodered.org/u/nicedevil)\
**Replies:** 10\
**Last updated:** [26 February 2021 15:34 UTC](https://discourse.nodered.org/t/nodered-crashed-after-var-undefined/41683 "2021-02-26T15:34:23Z")

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Heya I just noticed that my node-red keeps crashing all day long. Inside the logs I could find that node-red seems to have a problem after a function node tries to get an undefined variable. here an example on how I de…

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## [Node-RED Self Restart](https://discourse.nodered.org/t/node-red-self-restart/432)

<div class="topic-metadata">

**Author:** [@GChapo](https://discourse.nodered.org/u/GChapo)\
**Replies:** 30\
**Last updated:** [26 February 2021 14:08 UTC](https://discourse.nodered.org/t/node-red-self-restart/432 "2021-02-26T14:08:54Z")

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Is there a node red restart command available? I have put a reboot command in an exec node which works well, but sometimes it maybe that node red requires a restart rather than the computer and I wondered if restart was…

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## [Sending a email with a attachment and a text](https://discourse.nodered.org/t/sending-a-email-with-a-attachment-and-a-text/41626)

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**Author:** [@Bradley](https://discourse.nodered.org/u/Bradley)\
**Replies:** 13\
**Last updated:** [26 February 2021 13:16 UTC](https://discourse.nodered.org/t/sending-a-email-with-a-attachment-and-a-text/41626 "2021-02-26T13:16:13Z")

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Im trying for a project to send a email with a bit of text and a attachment but dont find how to do it tried some things also lloked on the internet but dont realy find something similar because the person who will get …

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## [How to connect to nodered using raspberry pi hostname](https://discourse.nodered.org/t/how-to-connect-to-nodered-using-raspberry-pi-hostname/12145)

<div class="topic-metadata">

**Author:** [@cuxcrider](https://discourse.nodered.org/u/cuxcrider)\
**Replies:** 8\
**Last updated:** [26 February 2021 13:01 UTC](https://discourse.nodered.org/t/how-to-connect-to-nodered-using-raspberry-pi-hostname/12145 "2021-02-26T13:01:16Z")

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Goal: I would like to allow users to just type into their browser: \<hostname\> and automatically be directed to the nodered dashboard app I made. Progress so far: Nodered is running on a raspberry pi. I already chang…

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## [Openweathermap how to insert api](https://discourse.nodered.org/t/openweathermap-how-to-insert-api/41680)

<div class="topic-metadata">

**Author:** [@sfedo](https://discourse.nodered.org/u/sfedo)\
**Replies:** 2\
**Last updated:** [26 February 2021 12:57 UTC](https://discourse.nodered.org/t/openweathermap-how-to-insert-api/41680 "2021-02-26T12:57:40Z")

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where to set api inside openweathermap node?? I found older tutorials with a field for an api key, but the new node, Ive installed doesnt have it?

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## [Somfy Tahoma OAuth2 - Authorization Code Grant Challenge](https://discourse.nodered.org/t/somfy-tahoma-oauth2-authorization-code-grant-challenge/41428)

<div class="topic-metadata">

**Author:** [@n300](https://discourse.nodered.org/u/n300)\
**Replies:** 6\
**Last updated:** [26 February 2021 12:00 UTC](https://discourse.nodered.org/t/somfy-tahoma-oauth2-authorization-code-grant-challenge/41428 "2021-02-26T12:00:12Z")

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Hi there, I'm using Redmatic (specialized node-red version for Homematic CCU3). My latest project is, to automate my Somfy RTS windows shutters via Somfy Tahoma. But at the moment I'm failing to get an initial API-Toke…

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