# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=199

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

**Page:** 200

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## [UI Control multiple sessions hide/show groups](https://discourse.nodered.org/t/ui-control-multiple-sessions-hide-show-groups/79408)

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**Author:** [@kubasmyk](https://discourse.nodered.org/u/kubasmyk)\
**Replies:** 3\
**Last updated:** [27 June 2023 01:41 UTC](https://discourse.nodered.org/t/ui-control-multiple-sessions-hide-show-groups/79408 "2023-06-27T01:41:11Z")

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Hi should this be possible to do? I have dropdown node that controls show and hide groups that works fine in a browser session. When view the dashboard at the same time on the second screen ui session the dropdown change…

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## [How to read or write to individual cells in excel using node red](https://discourse.nodered.org/t/how-to-read-or-write-to-individual-cells-in-excel-using-node-red/79412)

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**Author:** [@user2002](https://discourse.nodered.org/u/user2002)\
**Replies:** 1\
**Last updated:** [26 June 2023 18:20 UTC](https://discourse.nodered.org/t/how-to-read-or-write-to-individual-cells-in-excel-using-node-red/79412 "2023-06-26T18:20:00Z")

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I want to read or write to a particular cell of a specific sheet of an excel file using an excel node in node-red. Please give the flow for this and/or java script code.

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## [Question about svg node not respecing dimensions / proportions](https://discourse.nodered.org/t/question-about-svg-node-not-respecing-dimensions-proportions/79417)

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**Author:** [@vongomben](https://discourse.nodered.org/u/vongomben)\
**Replies:** 0\
**Last updated:** [26 June 2023 12:56 UTC](https://discourse.nodered.org/t/question-about-svg-node-not-respecing-dimensions-proportions/79417 "2023-06-26T12:56:00Z")

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The Svg node is the most interesting one I've been playing so far for creating custom visualizations (which is super requested and cool). In this case, I'm trying to visualize the weight of people using a smart sole. I…

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## [Modbus TCP previews correct output, but receiving end gets garbage](https://discourse.nodered.org/t/modbus-tcp-previews-correct-output-but-receiving-end-gets-garbage/78322)

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**Author:** [@Darren](https://discourse.nodered.org/u/Darren)\
**Replies:** 25\
**Last updated:** [26 June 2023 12:21 UTC](https://discourse.nodered.org/t/modbus-tcp-previews-correct-output-but-receiving-end-gets-garbage/78322 "2023-06-26T12:21:37Z")

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I'm running a Modbus TCP server within node-red. I had a bit of an adventure forwarding the right ports from Docker, and now its signal is reachable from clients (sorry, I know it's master/slave config, but I'm more fami…

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## [Node Red Custom Token issue](https://discourse.nodered.org/t/node-red-custom-token-issue/79368)

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**Author:** [@arzooshah](https://discourse.nodered.org/u/arzooshah)\
**Replies:** 1\
**Last updated:** [26 June 2023 10:27 UTC](https://discourse.nodered.org/t/node-red-custom-token-issue/79368 "2023-06-26T10:27:19Z")

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We have successfully integrated and launched the Node-RED application as an embedded component within our existing system using an iframe. However, we encountered an issue where all the child requests are being denied du…

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## [IOT2050+MX300+Sensor](https://discourse.nodered.org/t/iot2050-mx300-sensor/78950)

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**Author:** [@Edona](https://discourse.nodered.org/u/Edona)\
**Replies:** 20\
**Last updated:** [26 June 2023 09:24 UTC](https://discourse.nodered.org/t/iot2050-mx300-sensor/78950 "2023-06-26T09:24:54Z")

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Hello Please I need help... I am trying to reach data from my Sensor but I am not getting it unfortunatelyy with Node -Red At the beginning it was working then after to many time of running i am getting only errors…

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## [How to set two same incoming message formats to different variables](https://discourse.nodered.org/t/how-to-set-two-same-incoming-message-formats-to-different-variables/79349)

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**Author:** [@Industry40](https://discourse.nodered.org/u/Industry40)\
**Replies:** 3\
**Last updated:** [26 June 2023 00:47 UTC](https://discourse.nodered.org/t/how-to-set-two-same-incoming-message-formats-to-different-variables/79349 "2023-06-26T00:47:04Z")

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Hello, I am receiving two messages from different nodes from plc and I need to set it to two different variables. But its not working as planned. To have a better understanding there is an example flow below. Do someo…

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## [Emotiv push node data send them via mqtt protocol to an esp8266 and activate an output](https://discourse.nodered.org/t/emotiv-push-node-data-send-them-via-mqtt-protocol-to-an-esp8266-and-activate-an-output/79357)

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**Author:** [@osman11](https://discourse.nodered.org/u/osman11)\
**Replies:** 3\
**Last updated:** [25 June 2023 14:45 UTC](https://discourse.nodered.org/t/emotiv-push-node-data-send-them-via-mqtt-protocol-to-an-esp8266-and-activate-an-output/79357 "2023-06-25T14:45:10Z")

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I am using the emotiv simulator to generate integer data from 0 to 100 through the emotiv node, in this case the push node, I need to send these data to the mosquito broker that will communicate through the MQTT protocol…

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## [Function with Puppeteer](https://discourse.nodered.org/t/function-with-puppeteer/79401)

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**Author:** [@mtoko](https://discourse.nodered.org/u/mtoko)\
**Replies:** 2\
**Last updated:** [25 June 2023 14:24 UTC](https://discourse.nodered.org/t/function-with-puppeteer/79401 "2023-06-25T14:24:14Z")

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Hi I have a working javascript file that uses Puppeteer to submit a form. I would like to use this in a Node Red function, I have added the puppeteer library in the set up of the function but there are errors in the fun…

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## [Save nodes password for backups](https://discourse.nodered.org/t/save-nodes-password-for-backups/79402)

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**Author:** [@andre\_x](https://discourse.nodered.org/u/andre_x)\
**Replies:** 2\
**Last updated:** [25 June 2023 13:18 UTC](https://discourse.nodered.org/t/save-nodes-password-for-backups/79402 "2023-06-25T13:18:11Z")

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Hi all! When I restore a flow from backup I have to reinsert all the password of nodes (MQTT, email, etc.). Is there a way to save them? Thanks!

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## [Let the lamp flash when the machine is ready](https://discourse.nodered.org/t/let-the-lamp-flash-when-the-machine-is-ready/79393)

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**Author:** [@Damrak2022](https://discourse.nodered.org/u/Damrak2022)\
**Replies:** 1\
**Last updated:** [25 June 2023 06:47 UTC](https://discourse.nodered.org/t/let-the-lamp-flash-when-the-machine-is-ready/79393 "2023-06-25T06:47:12Z")

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Hello everyone, I need your help please. So far I've created a flow that sends me a pushover message when my washing machine is done. Now I still have a Hue lamp in the living room and I want it to flash blue 10 times a…

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## [Toggle POE State of UniFi Switch Ports WITH node-red-contrib-unifi-os](https://discourse.nodered.org/t/toggle-poe-state-of-unifi-switch-ports-with-node-red-contrib-unifi-os/78734)

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**Author:** [@ager](https://discourse.nodered.org/u/ager)\
**Replies:** 8\
**Last updated:** [25 June 2023 00:40 UTC](https://discourse.nodered.org/t/toggle-poe-state-of-unifi-switch-ports-with-node-red-contrib-unifi-os/78734 "2023-06-25T00:40:41Z")

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Hi all, I would like to be able to toggle (On/Off POE) POE on unifi switch ports from Loxone commands (http or udp doesnt matter it is working for me). I have POE Unifi switch US-8-60W. (1-4 port is without POE and por…

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## [Node-RED Standalone Executable](https://discourse.nodered.org/t/node-red-standalone-executable/77963)

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**Author:** [@jgreenmt](https://discourse.nodered.org/u/jgreenmt)\
**Replies:** 41\
**Last updated:** [24 June 2023 12:08 UTC](https://discourse.nodered.org/t/node-red-standalone-executable/77963 "2023-06-24T12:08:13Z")

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Hello all, I am curious about the best way to package a Node-RED application for deployment as a standalone executable. The goal is to be able to develop a Node-RED application on a Raspberry Pi and once it is finished,…

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## [Send a click to a button on a dashboard in node red function](https://discourse.nodered.org/t/send-a-click-to-a-button-on-a-dashboard-in-node-red-function/79379)

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**Author:** [@azxo1](https://discourse.nodered.org/u/azxo1)\
**Replies:** 4\
**Last updated:** [24 June 2023 11:20 UTC](https://discourse.nodered.org/t/send-a-click-to-a-button-on-a-dashboard-in-node-red-function/79379 "2023-06-24T11:20:56Z")

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Hello everyone! The code below is from a dashboard button. How can I send this button an on-click using http-request? (Either function or other) In id="microphone\_control\_3910" "3910" always changes to node red Deploy \<b…

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## [Node-Red editor running very quick on Windows - Very slow on Raspberry Pi - Why?](https://discourse.nodered.org/t/node-red-editor-running-very-quick-on-windows-very-slow-on-raspberry-pi-why/79365)

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**Author:** [@dr\_cave\_dweller](https://discourse.nodered.org/u/dr_cave_dweller)\
**Replies:** 12\
**Last updated:** [23 June 2023 19:55 UTC](https://discourse.nodered.org/t/node-red-editor-running-very-quick-on-windows-very-slow-on-raspberry-pi-why/79365 "2023-06-23T19:55:48Z")

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The exact same json file runs very quick on my Windows PC, but very slow on the Raspberry Pi. The flow is quite large spread over many tabs, and I am using Dashboard as well. When I say quick, I mean when I am in the ed…

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## [Trying to store a value in change node and pick it up in switch nodes](https://discourse.nodered.org/t/trying-to-store-a-value-in-change-node-and-pick-it-up-in-switch-nodes/79378)

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**Author:** [@FSHelgeland](https://discourse.nodered.org/u/FSHelgeland)\
**Replies:** 5\
**Last updated:** [23 June 2023 17:38 UTC](https://discourse.nodered.org/t/trying-to-store-a-value-in-change-node-and-pick-it-up-in-switch-nodes/79378 "2023-06-23T17:38:39Z")

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So I have made this input number in home assistant to have the possibility to adjust the level of moist when the temporary boost shall start. I thought it would be possible to store the input value and the pick it up an…

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## [Extracting text from object using mustache template](https://discourse.nodered.org/t/extracting-text-from-object-using-mustache-template/79370)

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**Author:** [@smanjunath211](https://discourse.nodered.org/u/smanjunath211)\
**Replies:** 1\
**Last updated:** [23 June 2023 13:26 UTC](https://discourse.nodered.org/t/extracting-text-from-object-using-mustache-template/79370 "2023-06-23T13:26:21Z")

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\[{"id":"f9a5770faf447e4d","type":"inject","z":"400bc99efba52b23","name":"","props":\[{"p":"payload"},{"p":"topic","vt":"str"}\],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"\[{\\"Text\\":\\"SP-4 …

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## [WAP list with graph - help please](https://discourse.nodered.org/t/wap-list-with-graph-help-please/79361)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 25\
**Last updated:** [23 June 2023 11:55 UTC](https://discourse.nodered.org/t/wap-list-with-graph-help-please/79361 "2023-06-23T11:55:50Z")

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I have some code that lists all the visible WAPs. (Though I don't think it is going to work for what I am wanting to do.) :frowning: (python code) #wifiscan.py import subprocess import json import re child = subpr…

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## [Tensor flow installation error](https://discourse.nodered.org/t/tensor-flow-installation-error/79363)

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**Author:** [@PRABHAKAR82](https://discourse.nodered.org/u/PRABHAKAR82)\
**Replies:** 1\
**Last updated:** [23 June 2023 11:15 UTC](https://discourse.nodered.org/t/tensor-flow-installation-error/79363 "2023-06-23T11:15:21Z")

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I am trying to install tensor flow but got error. Error log is as bellow 2023-06-23T10:28:37.356Z Install : node-red-contrib-tensorflow 0.4.2 2023-06-23T10:28:37.368Z npm.cmd install --no-audit --no-update-notifier --n…

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## [Avoid the ? in the msg.payload](https://discourse.nodered.org/t/avoid-the-in-the-msg-payload/79360)

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**Author:** [@Vaibhavi27](https://discourse.nodered.org/u/Vaibhavi27)\
**Replies:** 9\
**Last updated:** [23 June 2023 11:08 UTC](https://discourse.nodered.org/t/avoid-the-in-the-msg-payload/79360 "2023-06-23T11:08:52Z")

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Hii, The data coming from the serial monitor has ? error coming in between the msg.payload:string I have no idea how to avoid those.

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## [ERROR due to firebase](https://discourse.nodered.org/t/error-due-to-firebase/79313)

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**Author:** [@Vaibhavi27](https://discourse.nodered.org/u/Vaibhavi27)\
**Replies:** 5\
**Last updated:** [23 June 2023 09:37 UTC](https://discourse.nodered.org/t/error-due-to-firebase/79313 "2023-06-23T09:37:56Z")

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"Error: FIREBASE FATAL ERROR: Cannot parse Firebase url. Please use https://.firebaseio.com I am not using firebase currently. How to get rid of this error in the debug

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## [Import excel file and read data from it](https://discourse.nodered.org/t/import-excel-file-and-read-data-from-it/79302)

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**Author:** [@douchebagraccoon](https://discourse.nodered.org/u/douchebagraccoon)\
**Replies:** 11\
**Last updated:** [23 June 2023 06:42 UTC](https://discourse.nodered.org/t/import-excel-file-and-read-data-from-it/79302 "2023-06-23T06:42:24Z")

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Hello everyone, Is it possible to import an excel file (xlsx, xlsm) into node-red and extract data from it without precising the path of said file ? Almost like a "drag and drop your file here" on the dashboard. Thank…

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## [Node-red-contrib-oauth2 not able to install or load](https://discourse.nodered.org/t/node-red-contrib-oauth2-not-able-to-install-or-load/79329)

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**Author:** [@cabh](https://discourse.nodered.org/u/cabh)\
**Replies:** 7\
**Last updated:** [23 June 2023 05:41 UTC](https://discourse.nodered.org/t/node-red-contrib-oauth2-not-able-to-install-or-load/79329 "2023-06-23T05:41:04Z")

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I am having difficulty installing node-red-contrib-oauth2. my stats are as follows: Node-Red version 3.02 Node v18.16.0 NPM v9.5.1 OS Ubuntu 20.04.6 LTS Additional notes form Log trying to install: 2023-06-20T18:16:2…

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## [Help with simple OCR of two-digit numbers](https://discourse.nodered.org/t/help-with-simple-ocr-of-two-digit-numbers/79339)

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**Author:** [@grant1](https://discourse.nodered.org/u/grant1)\
**Replies:** 6\
**Last updated:** [23 June 2023 04:51 UTC](https://discourse.nodered.org/t/help-with-simple-ocr-of-two-digit-numbers/79339 "2023-06-23T04:51:13Z")

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Hello and thanks in advance for anyone's help here... See these 3 photos of my setup and flow: https://photos.app.goo.gl/g8XBTwsx5xYe1NXc6 I have set up this OCR node to read a two-digit value via a webcam. I convert …

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## [Http request login](https://discourse.nodered.org/t/http-request-login/79328)

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**Author:** [@tgottie](https://discourse.nodered.org/u/tgottie)\
**Replies:** 17\
**Last updated:** [23 June 2023 04:38 UTC](https://discourse.nodered.org/t/http-request-login/79328 "2023-06-23T04:38:13Z")

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ive been trying to google this but cant find anything that works, but how do I make it so that the request will log into my webpages user account. I am trying to access a linear emerge webpage that has all my users data,…

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## [How do I update node.js to latest version?](https://discourse.nodered.org/t/how-do-i-update-node-js-to-latest-version/79280)

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**Author:** [@dynamicdave](https://discourse.nodered.org/u/dynamicdave)\
**Replies:** 14\
**Last updated:** [22 June 2023 17:16 UTC](https://discourse.nodered.org/t/how-do-i-update-node-js-to-latest-version/79280 "2023-06-22T17:16:28Z")

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I used this script to update one of my RPi-4B running NR version 2 on Buster. $ bash \<(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodered) --node16 Although I adde…

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## [What is this type of error and how can i fix it](https://discourse.nodered.org/t/what-is-this-type-of-error-and-how-can-i-fix-it/79347)

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**Author:** [@Hamza7](https://discourse.nodered.org/u/Hamza7)\
**Replies:** 2\
**Last updated:** [22 June 2023 16:45 UTC](https://discourse.nodered.org/t/what-is-this-type-of-error-and-how-can-i-fix-it/79347 "2023-06-22T16:45:28Z")

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RequestError: write EPROTO 38410000:error:0A000152:SSL routines:final\_renegotiate:unsafe legacy renegotiation disabled:c:\\ws\\deps\\openssl\\openssl\\ssl\\statem\\extensions.c:922:

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## [How best to restrict an httpNodeMiddleware function to certain endpoints](https://discourse.nodered.org/t/how-best-to-restrict-an-httpnodemiddleware-function-to-certain-endpoints/79351)

<div class="topic-metadata">

**Author:** [@mpolling](https://discourse.nodered.org/u/mpolling)\
**Replies:** 3\
**Last updated:** [22 June 2023 16:42 UTC](https://discourse.nodered.org/t/how-best-to-restrict-an-httpnodemiddleware-function-to-certain-endpoints/79351 "2023-06-22T16:42:12Z")

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I am using some middleware functions to get authentication/authorization on my endpoints. (Doing it this way because I don't want to bother with that in my flows, and I want OAuth2 instead of basic auth.) I got it worki…

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## [Tcp client, websocket](https://discourse.nodered.org/t/tcp-client-websocket/79343)

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**Author:** [@CRIS19Nn](https://discourse.nodered.org/u/CRIS19Nn)\
**Replies:** 1\
**Last updated:** [22 June 2023 16:31 UTC](https://discourse.nodered.org/t/tcp-client-websocket/79343 "2023-06-22T16:31:03Z")

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Greetings, is there any guide or example of real use that meets these requirements. -A TCP node that acts as a client. -a websocket server that can get the data from the TCP client. -Identify the connection data of th…

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## [Strange signal spike to GPIO pins at startup of NodeRED (Pigpiod)](https://discourse.nodered.org/t/strange-signal-spike-to-gpio-pins-at-startup-of-nodered-pigpiod/78391)

<div class="topic-metadata">

**Author:** [@rik1984](https://discourse.nodered.org/u/rik1984)\
**Replies:** 59\
**Last updated:** [22 June 2023 09:25 UTC](https://discourse.nodered.org/t/strange-signal-spike-to-gpio-pins-at-startup-of-nodered-pigpiod/78391 "2023-06-22T09:25:04Z")

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I'm currently using NodeRED to interact with the GPIO pins of my RPI4 board. All works pretty well, but when I'm rebooting my RPI I have a very short signal pulse to the relays that are connected to the GPIO output pins.…

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