# Latest

**URL:** https://discourse.nodered.org/latest.md?page=974

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

**Page:** 975

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## [Face recognition pallet installation error](https://discourse.nodered.org/t/face-recognition-pallet-installation-error/34562)

<div class="topic-metadata">

**Author:** [@alikhan](https://discourse.nodered.org/u/alikhan)\
**Replies:** 6\
**Last updated:** [20 October 2020 16:58 UTC](https://discourse.nodered.org/t/face-recognition-pallet-installation-error/34562 "2020-10-20T16:58:19Z")

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with node-red 1.2.1 installation of face recognition getting error.

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## [Calculate percentage between time](https://discourse.nodered.org/t/calculate-percentage-between-time/34448)

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**Author:** [@MrWolff](https://discourse.nodered.org/u/MrWolff)\
**Replies:** 32\
**Last updated:** [20 October 2020 16:44 UTC](https://discourse.nodered.org/t/calculate-percentage-between-time/34448 "2020-10-20T16:44:24Z")

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Hi Everyone, I am new to this forum. I struggle with calculating percentage between two times. I have the time in two objects. The 'operating' time and the 'downtime'. I want to calculate the 'uptime' (by operating t…

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## [Conversion Temperature (Celsius) to RGB Value](https://discourse.nodered.org/t/conversion-temperature-celsius-to-rgb-value/34548)

<div class="topic-metadata">

**Author:** [@Noschvie](https://discourse.nodered.org/u/Noschvie)\
**Replies:** 4\
**Last updated:** [20 October 2020 16:22 UTC](https://discourse.nodered.org/t/conversion-temperature-celsius-to-rgb-value/34548 "2020-10-20T16:22:31Z")

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Hello is there a function available to convert a temperature value (range 10° Celsius up to 90°) to a RGB value representing the colour ? The calculated colour / RGB value shall be used to controll a LED. Thanks!

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## [Example of how to capture ui-table column resizing done by operator dynamically?](https://discourse.nodered.org/t/example-of-how-to-capture-ui-table-column-resizing-done-by-operator-dynamically/34578)

<div class="topic-metadata">

**Author:** [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\
**Replies:** 1\
**Last updated:** [20 October 2020 15:36 UTC](https://discourse.nodered.org/t/example-of-how-to-capture-ui-table-column-resizing-done-by-operator-dynamically/34578 "2020-10-20T15:36:09Z")

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Example of how to capture ui-table column resizing done by operator dynamically? I this is my first project where I am not just using the basic form (submit) logic in the dashboard for operating input, so starting from …

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## [Setting OPC UA Variables](https://discourse.nodered.org/t/setting-opc-ua-variables/34581)

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**Author:** [@b.chi](https://discourse.nodered.org/u/b.chi)\
**Replies:** 0\
**Last updated:** [20 October 2020 15:19 UTC](https://discourse.nodered.org/t/setting-opc-ua-variables/34581 "2020-10-20T15:19:19Z")

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Hi everyone! I'm a newbie in the automation field, so please excuse my dumb question. I am developing an OPC UA server using Node-RED, but I really don't know how to create, read and write variables in it. I am using …

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## [How can I set up open dashboard access, but have user/pass on editor?](https://discourse.nodered.org/t/how-can-i-set-up-open-dashboard-access-but-have-user-pass-on-editor/34572)

<div class="topic-metadata">

**Author:** [@thebaldgeek](https://discourse.nodered.org/u/thebaldgeek)\
**Replies:** 5\
**Last updated:** [20 October 2020 15:08 UTC](https://discourse.nodered.org/t/how-can-i-set-up-open-dashboard-access-but-have-user-pass-on-editor/34572 "2020-10-20T15:08:39Z")

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Have been trolling through this forum and Google looking for an answer for just over two hours, if I missed it, please point it out and I will be on my way.... I'd like to have unfettered access to the dashboard pages, …

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## [Raspberry Pi Zero with Node-Red as webserver over WiFi?](https://discourse.nodered.org/t/raspberry-pi-zero-with-node-red-as-webserver-over-wifi/34530)

<div class="topic-metadata">

**Author:** [@dr\_cave\_dweller](https://discourse.nodered.org/u/dr_cave_dweller)\
**Replies:** 6\
**Last updated:** [20 October 2020 14:57 UTC](https://discourse.nodered.org/t/raspberry-pi-zero-with-node-red-as-webserver-over-wifi/34530 "2020-10-20T14:57:57Z")

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Hi all, I have a previous project where I use a Raspberry Pi Zero W running headless as a SoftAP web server, it reads serial data and pushes data to a webpage when requested by Client connected over Ethernet or WiFi. I …

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## [Uploading multiple files at once](https://discourse.nodered.org/t/uploading-multiple-files-at-once/34571)

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**Author:** [@Filipus24](https://discourse.nodered.org/u/Filipus24)\
**Replies:** 1\
**Last updated:** [20 October 2020 14:49 UTC](https://discourse.nodered.org/t/uploading-multiple-files-at-once/34571 "2020-10-20T14:49:51Z")

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Hello good folks, I am trying to upload multiple files at once, from Node-RED to another server, using the HTTP Request Node. The documentation explains the payload structure required to attach a single file: { "KE…

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## [Hikvision Onvif doorbell - how did OpenHab get it working?](https://discourse.nodered.org/t/hikvision-onvif-doorbell-how-did-openhab-get-it-working/34404)

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**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 6\
**Last updated:** [20 October 2020 14:36 UTC](https://discourse.nodered.org/t/hikvision-onvif-doorbell-how-did-openhab-get-it-working/34404 "2020-10-20T14:36:24Z")

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Hi folks, Having my own ip video doorbell is already since day one on my todo list. But most bells need a cloud subscription, and I'm not going to pay somebody to look at my own pictures from my own camera... The DoorB…

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## [Cookbook - backup - projects](https://discourse.nodered.org/t/cookbook-backup-projects/34575)

<div class="topic-metadata">

**Author:** [@hklages](https://discourse.nodered.org/u/hklages)\
**Replies:** 0\
**Last updated:** [20 October 2020 14:04 UTC](https://discourse.nodered.org/t/cookbook-backup-projects/34575 "2020-10-20T14:04:40Z")

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Hi. I suggest 2 updates - see the bold text - for the following page: Node-RED backup flows\_\*.json & flows\_\*\_cred.json in case you don't use projects. .config.json or since version 1.20 .config.\*.json This contai…

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## [Automated Current limit](https://discourse.nodered.org/t/automated-current-limit/33883)

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**Author:** [@Londine](https://discourse.nodered.org/u/Londine)\
**Replies:** 6\
**Last updated:** [20 October 2020 12:09 UTC](https://discourse.nodered.org/t/automated-current-limit/33883 "2020-10-20T12:09:54Z")

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I am best to say a beginner compared to the knowledgeable people on this site. Thankfully for this site i have read and fought through the beginning of the learning curve and found my self knowing enough about NR and it…

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## [Control radiator thermostat Zigbee2mqtt](https://discourse.nodered.org/t/control-radiator-thermostat-zigbee2mqtt/34454)

<div class="topic-metadata">

**Author:** [@Monokel777](https://discourse.nodered.org/u/Monokel777)\
**Replies:** 3\
**Last updated:** [20 October 2020 11:34 UTC](https://discourse.nodered.org/t/control-radiator-thermostat-zigbee2mqtt/34454 "2020-10-20T11:34:18Z")

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Hello, I got a "Eurotronic Spirit ZigBee" and an Zigbee-Stick for my Raspberry Pi 3. I also use Nodered (4 sure) and mosquitto. Now i can see the radiator thermostat on my devices, but i cant use it and the documentat…

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## [Finger print reader](https://discourse.nodered.org/t/finger-print-reader/34559)

<div class="topic-metadata">

**Author:** [@Ataraxial](https://discourse.nodered.org/u/Ataraxial)\
**Replies:** 1\
**Last updated:** [20 October 2020 11:30 UTC](https://discourse.nodered.org/t/finger-print-reader/34559 "2020-10-20T11:30:57Z")

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Good morning, I am interested in integrating a fingerprint reader in node red, and I was wondering if there is already a node that works with a specific brand. The hardware I had looked at was this or similar. https:/…

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## [Json in Bar-Chart](https://discourse.nodered.org/t/json-in-bar-chart/33931)

<div class="topic-metadata">

**Author:** [@Ataraxial](https://discourse.nodered.org/u/Ataraxial)\
**Replies:** 4\
**Last updated:** [20 October 2020 10:59 UTC](https://discourse.nodered.org/t/json-in-bar-chart/33931 "2020-10-20T10:59:09Z")

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good morning I am working with a series of data from the API of a website, I have transformed them to JSON, remaining in this format. \[ { "value": 104.61, "hora": "00" }, { "value": …

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## [Making Validation System - by showing valid label depending on a msg.payload value coming from Database when it is true and showing an error label when the msg.payload is false](https://discourse.nodered.org/t/making-validation-system-by-showing-valid-label-depending-on-a-msg-payload-value-coming-from-database-when-it-is-true-and-showing-an-error-label-when-the-msg-payload-is-false/34557)

<div class="topic-metadata">

**Author:** [@Verina](https://discourse.nodered.org/u/Verina)\
**Replies:** 0\
**Last updated:** [20 October 2020 10:40 UTC](https://discourse.nodered.org/t/making-validation-system-by-showing-valid-label-depending-on-a-msg-payload-value-coming-from-database-when-it-is-true-and-showing-an-error-label-when-the-msg-payload-is-false/34557 "2020-10-20T10:40:52Z")

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I'm new to node-red, I'm working on a project where the user types a value in UI\_Template node and the value is passed to mongodb3 node to check if it exists in the database then send a msg.payload that comes to a page(U…

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## [\[ANNOUNCE\] Node-RED Desktop v1.2.0 Released](https://discourse.nodered.org/t/announce-node-red-desktop-v1-2-0-released/34529)

<div class="topic-metadata">

**Author:** [@sakazuki](https://discourse.nodered.org/u/sakazuki)\
**Replies:** 1\
**Last updated:** [20 October 2020 08:33 UTC](https://discourse.nodered.org/t/announce-node-red-desktop-v1-2-0-released/34529 "2020-10-20T08:33:48Z")

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Hi all, I released Node-RED Desktop v1.2.0 . This release includes Node-RED 1.2.2. If you have interested in Node-RED Desktop, Please try it. Homepage: https://sakazuki.github.io/node-red-desktop/ Regards, sakaz…

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## [How to use Timer on Dashboard with E-mail Notification](https://discourse.nodered.org/t/how-to-use-timer-on-dashboard-with-e-mail-notification/34537)

<div class="topic-metadata">

**Author:** [@akshay369](https://discourse.nodered.org/u/akshay369)\
**Replies:** 3\
**Last updated:** [20 October 2020 08:32 UTC](https://discourse.nodered.org/t/how-to-use-timer-on-dashboard-with-e-mail-notification/34537 "2020-10-20T08:32:55Z")

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Hello Everyone, I want to create Node-Red flow which can automated means ON and OFF Raspberry pi GPIO with controlled by start and Stop Timer. Make sure I want to set timer by UI page means user can set Start and Stop …

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## [Trigger every 6 hours but starting at 02:00?](https://discourse.nodered.org/t/trigger-every-6-hours-but-starting-at-02-00/34509)

<div class="topic-metadata">

**Author:** [@loeten](https://discourse.nodered.org/u/loeten)\
**Replies:** 8\
**Last updated:** [20 October 2020 08:21 UTC](https://discourse.nodered.org/t/trigger-every-6-hours-but-starting-at-02-00/34509 "2020-10-20T08:21:40Z")

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Hi there, I want to get messages every 6 hours and so I have a flow with an inject node at boot time connected to a a trigger node that is set every 6 hours. That works fine, but depends on the moment when I boot. Is t…

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## [\[ANNOUNCE\] node-red-constrib-selenium-wd2 0.1.0](https://discourse.nodered.org/t/announce-node-red-constrib-selenium-wd2-0-1-0/34158)

<div class="topic-metadata">

**Author:** [@simonr](https://discourse.nodered.org/u/simonr)\
**Replies:** 4\
**Last updated:** [20 October 2020 08:16 UTC](https://discourse.nodered.org/t/announce-node-red-constrib-selenium-wd2-0-1-0/34158 "2020-10-20T08:16:27Z")

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Hi all, I have made a new set of nodes which support selenium-webdriver API. It was based on node-red-contrib-selenium-webdriver (which is not supported since several years) but it ended with a complete rewriting in Typ…

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## [Help with or gate](https://discourse.nodered.org/t/help-with-or-gate/34473)

<div class="topic-metadata">

**Author:** [@rmystique](https://discourse.nodered.org/u/rmystique)\
**Replies:** 7\
**Last updated:** [20 October 2020 06:08 UTC](https://discourse.nodered.org/t/help-with-or-gate/34473 "2020-10-20T06:08:47Z")

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I cant get the or gate to output properly, with 2 trues coming in i still get a false out? \[{"id":"fe6acb18.1c8208","type":"change","z":"4f2cae6a.c5ec8","name":"","rules":\[{"t":"set","p":"Topic","pt":"msg","to":"2","tot…

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## [How to check if value exists in Array object](https://discourse.nodered.org/t/how-to-check-if-value-exists-in-array-object/34541)

<div class="topic-metadata">

**Author:** [@minhhn0205](https://discourse.nodered.org/u/minhhn0205)\
**Replies:** 2\
**Last updated:** [20 October 2020 07:34 UTC](https://discourse.nodered.org/t/how-to-check-if-value-exists-in-array-object/34541 "2020-10-20T07:34:48Z")

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Hi, To check whether the value (for example X0000002) exists in the array or not, I use the for loop, then it can be determined. \[{"id":"313fcd3d.d1cfa2","type":"inject","z":"fa444759.e27348","name":"","topic":"","pa…

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## [Calling npm module from the function node](https://discourse.nodered.org/t/calling-npm-module-from-the-function-node/34535)

<div class="topic-metadata">

**Author:** [@ded\_banzai](https://discourse.nodered.org/u/ded_banzai)\
**Replies:** 5\
**Last updated:** [20 October 2020 06:54 UTC](https://discourse.nodered.org/t/calling-npm-module-from-the-function-node/34535 "2020-10-20T06:54:02Z")

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I am trying to use world-clock npm module within function node for the first time. So, I installed module first, added one to the settings.js: functionGlobalContext: { worldClock:require('world-clock'), …

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## [Help for a newbie formating PLC inputs](https://discourse.nodered.org/t/help-for-a-newbie-formating-plc-inputs/33094)

<div class="topic-metadata">

**Author:** [@tarin71](https://discourse.nodered.org/u/tarin71)\
**Replies:** 4\
**Last updated:** [20 October 2020 06:08 UTC](https://discourse.nodered.org/t/help-for-a-newbie-formating-plc-inputs/33094 "2020-10-20T06:08:25Z")

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Sorry for posting this, I feel a bit ashamed. I'm an absolute newbie to node-red, and I cannot find how to do something that I assume should be quite easy to do. I want to read several inputs from an external device (a …

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## [Dificuldade para coveter para float](https://discourse.nodered.org/t/dificuldade-para-coveter-para-float/34531)

<div class="topic-metadata">

**Author:** [@jose632silva](https://discourse.nodered.org/u/jose632silva)\
**Replies:** 0\
**Last updated:** [20 October 2020 02:53 UTC](https://discourse.nodered.org/t/dificuldade-para-coveter-para-float/34531 "2020-10-20T02:53:24Z")

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Boa noite pessoal. Estou com um problema, na realidade eram dois, porem um eu consegui resolver lendo alguns tópicos aqui, mas o segundo ainda permanece! O problema é o seguinte estou recebendo um objeto JSOM, porém nã…

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## [How to change state of digital output based on payload](https://discourse.nodered.org/t/how-to-change-state-of-digital-output-based-on-payload/34481)

<div class="topic-metadata">

**Author:** [@thePLCguy](https://discourse.nodered.org/u/thePLCguy)\
**Replies:** 5\
**Last updated:** [19 October 2020 20:54 UTC](https://discourse.nodered.org/t/how-to-change-state-of-digital-output-based-on-payload/34481 "2020-10-19T20:54:02Z")

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Hi guys, this is going to come across as a real newbie question, but try as I might I have not been able to find an answer this online. This has got to be simple, surely. I have a message payload value from a 1 wire te…

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## [OPC UA nodes to MQTT topics](https://discourse.nodered.org/t/opc-ua-nodes-to-mqtt-topics/15370)

<div class="topic-metadata">

**Author:** [@smalhao](https://discourse.nodered.org/u/smalhao)\
**Replies:** 16\
**Last updated:** [19 October 2020 20:29 UTC](https://discourse.nodered.org/t/opc-ua-nodes-to-mqtt-topics/15370 "2020-10-19T20:29:32Z")

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I would like to know if through Node Red there is a way to convert the OPC UA nodes into MQTT, because I think that a while ago I saw a video that showed that but in the meantime I looked again and I can't find it.

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## [Cannot connect to external redis instance - solved](https://discourse.nodered.org/t/cannot-connect-to-external-redis-instance-solved/34508)

<div class="topic-metadata">

**Author:** [@mrsteve](https://discourse.nodered.org/u/mrsteve)\
**Replies:** 4\
**Last updated:** [19 October 2020 19:54 UTC](https://discourse.nodered.org/t/cannot-connect-to-external-redis-instance-solved/34508 "2020-10-19T19:54:17Z")

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I deployed nodered via docker/dockerhub As shown in the attachment, I'm hosting my redis on a seperate server within the same subnet as my nodered. I changed the redis instance information to point to the IP of the…

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## [Custom thermometer with OID](https://discourse.nodered.org/t/custom-thermometer-with-oid/34393)

<div class="topic-metadata">

**Author:** [@svetlinsem](https://discourse.nodered.org/u/svetlinsem)\
**Replies:** 6\
**Last updated:** [19 October 2020 19:52 UTC](https://discourse.nodered.org/t/custom-thermometer-with-oid/34393 "2020-10-19T19:52:28Z")

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Hello, first you are an amazing community. I'm new here and I have a case. I'm trying to check the temperature with a custom thermometer and I have the following points, channel, oid, IP, and port. I tried with UDP but w…

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## [Cannot update Node-Red v1.0.6](https://discourse.nodered.org/t/cannot-update-node-red-v1-0-6/34418)

<div class="topic-metadata">

**Author:** [@adi-dev](https://discourse.nodered.org/u/adi-dev)\
**Replies:** 21\
**Last updated:** [19 October 2020 19:32 UTC](https://discourse.nodered.org/t/cannot-update-node-red-v1-0-6/34418 "2020-10-19T19:32:47Z")

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Just checked my installation, which has been working uninterrupted for quite some time now and realized it's out of date, so I run sudo npm install -g --unsafe-perm node-red with result: npm WARN deprecated bcrypt@3.0.6…

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## [\[ANNOUNCE\] node-red-contrib-github-plus](https://discourse.nodered.org/t/announce-node-red-contrib-github-plus/34517)

<div class="topic-metadata">

**Author:** [@alexk111](https://discourse.nodered.org/u/alexk111)\
**Replies:** 1\
**Last updated:** [19 October 2020 18:41 UTC](https://discourse.nodered.org/t/announce-node-red-contrib-github-plus/34517 "2020-10-19T18:41:31Z")

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Hi everyone, Announcing node-red-contrib-github-plus which provides generic REST API & Webhook nodes for low-code GitHub integrations. https://flows.nodered.org/node/node-red-contrib-github-plus

[Previous page](https://discourse.nodered.org/latest.md?page=973)

[Next page](https://discourse.nodered.org/latest.md?page=975)