# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=490

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

**Page:** 491

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## [Debian - use gpio](https://discourse.nodered.org/t/debian-use-gpio/51527)

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**Author:** [@sdalee](https://discourse.nodered.org/u/sdalee)\
**Replies:** 7\
**Last updated:** [26 September 2021 12:12 UTC](https://discourse.nodered.org/t/debian-use-gpio/51527 "2021-09-26T12:12:57Z")

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HI, I installed debian 11 some days ago for Rpi 4, but I can't use GPIO. I installed 'node-red-node-pi-gpio' add-on. I'd like to use input, but the message doesn't come when I change the state of GPIO input. Under raspb…

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## [Converting hex to decimal](https://discourse.nodered.org/t/converting-hex-to-decimal/49580)

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**Author:** [@dick](https://discourse.nodered.org/u/dick)\
**Replies:** 29\
**Last updated:** [26 September 2021 07:02 UTC](https://discourse.nodered.org/t/converting-hex-to-decimal/49580 "2021-09-26T07:02:19Z")

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Hello, for you perhaps something stupids, but for me a problem Ho do i get decimal data from (wx)sensors TEMP;'00f6' ; HUM;'62'; Dick

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## [Looking for a text](https://discourse.nodered.org/t/looking-for-a-text/51525)

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**Author:** [@mversion](https://discourse.nodered.org/u/mversion)\
**Replies:** 6\
**Last updated:** [26 September 2021 05:44 UTC](https://discourse.nodered.org/t/looking-for-a-text/51525 "2021-09-26T05:44:01Z")

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I know it is something really basic that I'm missing here. So I am getting Pushbullet notifications from my phone to NodeRed. I'm looking for any particular notification with a msg.payload that contains a specific set of…

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## [Rocker Switch HTML CSS output question](https://discourse.nodered.org/t/rocker-switch-html-css-output-question/51514)

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**Author:** [@shel](https://discourse.nodered.org/u/shel)\
**Replies:** 5\
**Last updated:** [25 September 2021 21:41 UTC](https://discourse.nodered.org/t/rocker-switch-html-css-output-question/51514 "2021-09-25T21:41:51Z")

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Trying to stretch my HTML CSS wings and found a rocker switch I'd like to incorporate in a flow. Problem is I can't get any out put of the switch. Hours of googling has not helped so in desperation if there is a CSS wiza…

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## [Send data from s7 to mysql](https://discourse.nodered.org/t/send-data-from-s7-to-mysql/51310)

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**Author:** [@hederson2801](https://discourse.nodered.org/u/hederson2801)\
**Replies:** 11\
**Last updated:** [25 September 2021 21:10 UTC](https://discourse.nodered.org/t/send-data-from-s7-to-mysql/51310 "2021-09-25T21:10:08Z")

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Hello my friends. I am working with mysql and s7. I was able to communicate and write values ​​in my database. I'm not able to write the data I get from the PLC to mysql. I would like to save every two minutes of the dic…

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## [LAN shared folders in Android](https://discourse.nodered.org/t/lan-shared-folders-in-android/51475)

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**Author:** [@RafaelMarquesRibeiro](https://discourse.nodered.org/u/RafaelMarquesRibeiro)\
**Replies:** 7\
**Last updated:** [25 September 2021 20:58 UTC](https://discourse.nodered.org/t/lan-shared-folders-in-android/51475 "2021-09-25T20:58:20Z")

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Hi! Im developing a node-red flow where it needs to acess another computer folder with a network connection. In windows it works perfectly i just need to put the right directory (//PCNAME/etc). I've installed "Total Comm…

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## [Automate a huge volume of GET requests](https://discourse.nodered.org/t/automate-a-huge-volume-of-get-requests/51509)

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**Author:** [@humphrysr](https://discourse.nodered.org/u/humphrysr)\
**Replies:** 17\
**Last updated:** [25 September 2021 20:07 UTC](https://discourse.nodered.org/t/automate-a-huge-volume-of-get-requests/51509 "2021-09-25T20:07:19Z")

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I have a SQL Server table with 115,000+ last names and first name and some other identifiers. I need to make GET requests against a REST endpoint, using these data and store the json response for parsing. Can I use NR …

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## [Nrlint eslint:recommended rules not applied](https://discourse.nodered.org/t/nrlint-eslint-recommended-rules-not-applied/51502)

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**Author:** [@a\_grunt](https://discourse.nodered.org/u/a_grunt)\
**Replies:** 2\
**Last updated:** [25 September 2021 19:40 UTC](https://discourse.nodered.org/t/nrlint-eslint-recommended-rules-not-applied/51502 "2021-09-25T19:40:42Z")

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Hi everyone! I am trying to check my function nodes code with function-eslint rule in nrlint. nrlint version - 1.0.2 node-red version - 2.0.6 NodeJS version - 14.17.3 The function-eslint rule configuration is defaul…

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## [Best way to set up some context on boot](https://discourse.nodered.org/t/best-way-to-set-up-some-context-on-boot/51507)

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**Author:** [@Calendil](https://discourse.nodered.org/u/Calendil)\
**Replies:** 2\
**Last updated:** [25 September 2021 14:40 UTC](https://discourse.nodered.org/t/best-way-to-set-up-some-context-on-boot/51507 "2021-09-25T14:40:58Z")

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Hello all, I would like my set up some context at the beginning of a boot. \[start-up-trigger\] -----\[change\] Is this the best way to do it?

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## [Twilio out node play mp3 problems](https://discourse.nodered.org/t/twilio-out-node-play-mp3-problems/51513)

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**Author:** [@Hadas](https://discourse.nodered.org/u/Hadas)\
**Replies:** 0\
**Last updated:** [25 September 2021 14:21 UTC](https://discourse.nodered.org/t/twilio-out-node-play-mp3-problems/51513 "2021-09-25T14:21:09Z")

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Hi, Using twilio out node I am able to play the demo music however when I change the url to my own mp3's which are stored at google bucket I receive an error. We've made sure the access is public and still does not wor…

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## [Changing the Base Color Setting via CSS](https://discourse.nodered.org/t/changing-the-base-color-setting-via-css/51497)

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**Author:** [@Gunner](https://discourse.nodered.org/u/Gunner)\
**Replies:** 9\
**Last updated:** [25 September 2021 10:51 UTC](https://discourse.nodered.org/t/changing-the-base-color-setting-via-css/51497 "2021-09-25T10:51:10Z")

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As it is, the ui-digital-display node doesn't have any custom colour options (yet) instead it uses the Dashboard Theme colours. For example with the Base colour set as green... But with my preferred dark theme, it l…

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## ["if" within a loop not sending messages in correct order](https://discourse.nodered.org/t/if-within-a-loop-not-sending-messages-in-correct-order/51488)

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**Author:** [@notnice](https://discourse.nodered.org/u/notnice)\
**Replies:** 8\
**Last updated:** [25 September 2021 10:19 UTC](https://discourse.nodered.org/t/if-within-a-loop-not-sending-messages-in-correct-order/51488 "2021-09-25T10:19:00Z")

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I have a loop that works, and within that i'm using "if" to check the difference in days between 2 dates. When the "if" is matched I'm setting some flow variables which are used by the next node to send emails with other…

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## [I do not succeed in changing input\_number in home assistant from Node-Red function node](https://discourse.nodered.org/t/i-do-not-succeed-in-changing-input-number-in-home-assistant-from-node-red-function-node/51435)

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**Author:** [@Herman](https://discourse.nodered.org/u/Herman)\
**Replies:** 1\
**Last updated:** [25 September 2021 09:50 UTC](https://discourse.nodered.org/t/i-do-not-succeed-in-changing-input-number-in-home-assistant-from-node-red-function-node/51435 "2021-09-25T09:50:47Z")

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Hi, I do not succeed in changing an input\_number in home assistant using a Node-Red function. I had a look at Changing state of input\_number in Function Node - is it possible? but this could not solve my problem. I tri…

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## [Red node does not start anymore](https://discourse.nodered.org/t/red-node-does-not-start-anymore/51441)

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**Author:** [@WernerM96](https://discourse.nodered.org/u/WernerM96)\
**Replies:** 12\
**Last updated:** [25 September 2021 09:36 UTC](https://discourse.nodered.org/t/red-node-does-not-start-anymore/51441 "2021-09-25T09:36:05Z")

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Hey, since a edit on a template of the dashboard node red dont start anymore. Starting manually in putty gives me this console output: Welcome to Node-RED =================== 23 Sep 15:15:54 - \[info\] Node-RED version:…

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## [Is there a node to tell you if/when files are changed?](https://discourse.nodered.org/t/is-there-a-node-to-tell-you-if-when-files-are-changed/51504)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 2\
**Last updated:** [25 September 2021 09:30 UTC](https://discourse.nodered.org/t/is-there-a-node-to-tell-you-if-when-files-are-changed/51504 "2021-09-25T09:30:55Z")

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I've found this one: node-red-contrib-watchdirectory Reading the docs there is a hint there is a native one, but its name escapes me.

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## [MQTT - not getting it - again. message structure](https://discourse.nodered.org/t/mqtt-not-getting-it-again-message-structure/51493)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 3\
**Last updated:** [25 September 2021 07:48 UTC](https://discourse.nodered.org/t/mqtt-not-getting-it-again-message-structure/51493 "2021-09-25T07:48:49Z")

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It would seem my thinking I understand MQTT and messages is wrong. Or I am missing something - again. This is my test flow. \[{"id":"b87b117d64f2fc0a","type":"mqtt out","z":"65c9b63cb09879a0","name":"","topic":"test","…

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## [My OPCUA node suddenly don't work with the “End point must exist opc.tcp://GCS:4862” issue](https://discourse.nodered.org/t/my-opcua-node-suddenly-dont-work-with-the-end-point-must-exist-opc-tcp-gcs-4862-issue/51495)

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**Author:** [@Thormagol](https://discourse.nodered.org/u/Thormagol)\
**Replies:** 0\
**Last updated:** [25 September 2021 04:17 UTC](https://discourse.nodered.org/t/my-opcua-node-suddenly-dont-work-with-the-end-point-must-exist-opc-tcp-gcs-4862-issue/51495 "2021-09-25T04:17:09Z")

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I use the node-red-contrib-opcua node to connect the WinCC OPCUA， it works just fine until last night the Windows get itself updated. This morning I start my flows and find my node can\`t connect the Wincc OPC UA . the e…

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## [How to Merge 8 PNGs into 1 PNG?](https://discourse.nodered.org/t/how-to-merge-8-pngs-into-1-png/51422)

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**Author:** [@geoseph](https://discourse.nodered.org/u/geoseph)\
**Replies:** 31\
**Last updated:** [24 September 2021 23:35 UTC](https://discourse.nodered.org/t/how-to-merge-8-pngs-into-1-png/51422 "2021-09-24T23:35:44Z")

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Hey everyone, So I have essentially 8 png files at urls, that are 284px by 284px each, I want to stack them ontop of each other like layer so to speak and then save the composite as a single new png file. I've already…

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## [UIBUILDER - Dummies guild to using uiBuilder](https://discourse.nodered.org/t/uibuilder-dummies-guild-to-using-uibuilder/51290)

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**Author:** [@Sangoma8](https://discourse.nodered.org/u/Sangoma8)\
**Replies:** 6\
**Last updated:** [24 September 2021 16:12 UTC](https://discourse.nodered.org/t/uibuilder-dummies-guild-to-using-uibuilder/51290 "2021-09-24T16:12:11Z")

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Hi folks. I am keen on getting to use uibuilder, but their WIKI is rather difficult to fathom. Is there an alternate source on information on how to utilise the uibuilder; someting for bummies like me. I am not a fron…

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## [Uibuilder example](https://discourse.nodered.org/t/uibuilder-example/51445)

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**Author:** [@shel](https://discourse.nodered.org/u/shel)\
**Replies:** 28\
**Last updated:** [24 September 2021 16:11 UTC](https://discourse.nodered.org/t/uibuilder-example/51445 "2021-09-24T16:11:33Z")

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After reading the new dashboard topic I decided to try out the uibuilder to see what all the fuss was about. After loading a dozen examples I got none of them to work, not a single one. So I have decided to see if someon…

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## [Node Red Admin Authentication with Office 365(passport)](https://discourse.nodered.org/t/node-red-admin-authentication-with-office-365-passport/51479)

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**Author:** [@HarryPottar](https://discourse.nodered.org/u/HarryPottar)\
**Replies:** 0\
**Last updated:** [24 September 2021 15:33 UTC](https://discourse.nodered.org/t/node-red-admin-authentication-with-office-365-passport/51479 "2021-09-24T15:33:48Z")

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HI, Does anyone have an example of connecting the Node-Red Admin authentication to Office 365, using say passport I have worked with OAuth in my flows and registered apps in our azure and connected fine with both deleg…

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## [Capture image using Arduino and run object detection](https://discourse.nodered.org/t/capture-image-using-arduino-and-run-object-detection/50682)

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**Author:** [@norahb](https://discourse.nodered.org/u/norahb)\
**Replies:** 9\
**Last updated:** [24 September 2021 13:58 UTC](https://discourse.nodered.org/t/capture-image-using-arduino-and-run-object-detection/50682 "2021-09-24T13:58:35Z")

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Hi there, I am new to Node-Red. I am trying to build a flow that reads an image captured using Arduino Nano BLE 33 Sense. Then the image sent to (node-red-contrib-tfjs-coco-ssd) for object detection. The issue is that t…

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## [How to use push button to toggle Led in raspberry pi?](https://discourse.nodered.org/t/how-to-use-push-button-to-toggle-led-in-raspberry-pi/51444)

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**Author:** [@JasonV](https://discourse.nodered.org/u/JasonV)\
**Replies:** 9\
**Last updated:** [24 September 2021 13:43 UTC](https://discourse.nodered.org/t/how-to-use-push-button-to-toggle-led-in-raspberry-pi/51444 "2021-09-24T13:43:43Z")

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Hello my name is Jason, I have a question about how to set a push button as on/off function. I already started to construct a push button which functions quite nicely as long as I push and release the button. It then c…

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## [Bug in ui dashboard causes duplicate entries - reproducible](https://discourse.nodered.org/t/bug-in-ui-dashboard-causes-duplicate-entries-reproducible/2684)

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**Author:** [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Replies:** 4\
**Last updated:** [30 August 2018 08:56 UTC](https://discourse.nodered.org/t/bug-in-ui-dashboard-causes-duplicate-entries-reproducible/2684 "2018-08-30T08:56:12Z")

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Several people have mentioned this issue in the last couple days and I have stumbled upon for awhile. It happened to me again and I decided to see if I could reproduce it and I did. Here are the steps to reproduce the i…

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## [Two devices send messages, only the messages from one are arriving](https://discourse.nodered.org/t/two-devices-send-messages-only-the-messages-from-one-are-arriving/51349)

<div class="topic-metadata">

**Author:** [@minime](https://discourse.nodered.org/u/minime)\
**Replies:** 8\
**Last updated:** [24 September 2021 09:45 UTC](https://discourse.nodered.org/t/two-devices-send-messages-only-the-messages-from-one-are-arriving/51349 "2021-09-24T09:45:51Z")

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Hi there\` I'm new to node red and have an issue with multiple devices. I've managed to send data from my esp via mqtt to node-red. this data is processed and stored in influxDB. so far so good, everything worked. the …

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## [How to get the count of incoming node flow lines](https://discourse.nodered.org/t/how-to-get-the-count-of-incoming-node-flow-lines/51447)

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**Author:** [@gstick](https://discourse.nodered.org/u/gstick)\
**Replies:** 5\
**Last updated:** [24 September 2021 09:30 UTC](https://discourse.nodered.org/t/how-to-get-the-count-of-incoming-node-flow-lines/51447 "2021-09-24T09:30:40Z")

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Is there a way of getting the count of the number of incoming lines to a function node? For example if I had a function node with three input nodes linked to it, is there any code I can use in the function to count the …

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## [Delete part of an object in Context](https://discourse.nodered.org/t/delete-part-of-an-object-in-context/51371)

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**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 10\
**Last updated:** [24 September 2021 09:04 UTC](https://discourse.nodered.org/t/delete-part-of-an-object-in-context/51371 "2021-09-24T09:04:05Z")

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Guys, As my battery project has evolved i have evolved the name of objects and their properties. Is there a way to delete single parts of an object to remove any confusion ? Obviously i can delete the whole object if n…

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## [Node-red running on DietPi shows gpio nodes as not available](https://discourse.nodered.org/t/node-red-running-on-dietpi-shows-gpio-nodes-as-not-available/51463)

<div class="topic-metadata">

**Author:** [@kedzior-io](https://discourse.nodered.org/u/kedzior-io)\
**Replies:** 6\
**Last updated:** [24 September 2021 08:25 UTC](https://discourse.nodered.org/t/node-red-running-on-dietpi-shows-gpio-nodes-as-not-available/51463 "2021-09-24T08:25:53Z")

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o this, running the latest DietPi (DietPi\_RPi-ARMv6-Bullseye) on Raspberry Pi zero W and using node-red-node-pi-gpio (node) - Node-RED to talk to hardware. However after deployment I see this: RPi.GPIO python library…

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## [TcpIp client connecting to server and send-receive binary data on same socket](https://discourse.nodered.org/t/tcpip-client-connecting-to-server-and-send-receive-binary-data-on-same-socket/51453)

<div class="topic-metadata">

**Author:** [@nicky007](https://discourse.nodered.org/u/nicky007)\
**Replies:** 1\
**Last updated:** [24 September 2021 06:28 UTC](https://discourse.nodered.org/t/tcpip-client-connecting-to-server-and-send-receive-binary-data-on-same-socket/51453 "2021-09-24T06:28:10Z")

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Hi, I want to create in NodeRed a TcpIp client who connects to a TcpIp server at a specific address, port, sends data (so far I made one using Inject and TcpIp out node), and now the tricky part: I wish to receive on t…

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## [Unopened section "payload" at 4893](https://discourse.nodered.org/t/unopened-section-payload-at-4893/51376)

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**Author:** [@Nisha](https://discourse.nodered.org/u/Nisha)\
**Replies:** 20\
**Last updated:** [24 September 2021 04:39 UTC](https://discourse.nodered.org/t/unopened-section-payload-at-4893/51376 "2021-09-24T04:39:21Z")

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Hi there, Im trying to get output from pythonshell and give it to the template node in js using json node in between. But, whenever I run the node it says Unopened section "payload" at 4893. I am not getting how to get j…

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