# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=950

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

**Page:** 951

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## [Function Buffer to Outputs](https://discourse.nodered.org/t/function-buffer-to-outputs/2874)

<div class="topic-metadata">

**Author:** [@WimmerM](https://discourse.nodered.org/u/WimmerM)\
**Replies:** 1\
**Last updated:** [5 September 2018 13:09 UTC](https://discourse.nodered.org/t/function-buffer-to-outputs/2874 "2018-09-05T13:09:17Z")

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Hello, I get data about an IOT hub that looks like this: object deviceId: "Raspberry1" payload: buffer \[43\] string {DeviceId: 2, val \[1000,1000,1000,1000,1000\]} \_msgid: "7a2ce875.0b8488" Actually I'm only interest…

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## [Looking for blocking function](https://discourse.nodered.org/t/looking-for-blocking-function/2872)

<div class="topic-metadata">

**Author:** [@Foukk](https://discourse.nodered.org/u/Foukk)\
**Replies:** 1\
**Last updated:** [5 September 2018 10:41 UTC](https://discourse.nodered.org/t/looking-for-blocking-function/2872 "2018-09-05T10:41:31Z")

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hi, i need function that stops messages from one source, if recive message form another source. this message can be "stopblockig" and "startblocking".

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## [Where are the NodeRED core files on a Pi?](https://discourse.nodered.org/t/where-are-the-nodered-core-files-on-a-pi/2826)

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**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 11\
**Last updated:** [5 September 2018 08:27 UTC](https://discourse.nodered.org/t/where-are-the-nodered-core-files-on-a-pi/2826 "2018-09-05T08:27:56Z")

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I have a separate Node-RED github download install that I mess around in when trying things out before issuing pull-requests which works fine But I can't seem to find where the equivalent files are for the standard Node…

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## [Raspi 3 Outputs in Ascending or Descending Order](https://discourse.nodered.org/t/raspi-3-outputs-in-ascending-or-descending-order/2844)

<div class="topic-metadata">

**Author:** [@strickb](https://discourse.nodered.org/u/strickb)\
**Replies:** 5\
**Last updated:** [5 September 2018 07:47 UTC](https://discourse.nodered.org/t/raspi-3-outputs-in-ascending-or-descending-order/2844 "2018-09-05T07:47:46Z")

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I would like to control three Raspi Outputs based on an Upper and Lower Value. Upper Value is 100. If value is above 100 turn on first output, if still above 100 after 10 seconds turn on second output and if still above …

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## [Troubleshooting nodes - where to go?](https://discourse.nodered.org/t/troubleshooting-nodes-where-to-go/2823)

<div class="topic-metadata">

**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 11\
**Last updated:** [5 September 2018 00:26 UTC](https://discourse.nodered.org/t/troubleshooting-nodes-where-to-go/2823 "2018-09-05T00:26:19Z")

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Guys, Very strange one here. I am running the latest Node-red on Ubuntu 16.04. NPM is 6.2 I have a flow that sits in the background and pulls down the weather from Darksky - it is a direct cut and paste of one that P…

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## [Monitor if kids are using their smart device?](https://discourse.nodered.org/t/monitor-if-kids-are-using-their-smart-device/2720)

<div class="topic-metadata">

**Author:** [@nodecentral](https://discourse.nodered.org/u/nodecentral)\
**Replies:** 23\
**Last updated:** [4 September 2018 21:11 UTC](https://discourse.nodered.org/t/monitor-if-kids-are-using-their-smart-device/2720 "2018-09-04T21:11:26Z")

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Hi all Maybe a long shot - but the Mrs asked me the other day if it was possible or not.. Seeing as we limit screen time for our kids, they sometime find a window of opportunity to pick up their device and start to sur…

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## [Get specific data from mqtt message](https://discourse.nodered.org/t/get-specific-data-from-mqtt-message/2851)

<div class="topic-metadata">

**Author:** [@steffok](https://discourse.nodered.org/u/steffok)\
**Replies:** 2\
**Last updated:** [4 September 2018 20:44 UTC](https://discourse.nodered.org/t/get-specific-data-from-mqtt-message/2851 "2018-09-04T20:44:34Z")

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Im struggling a bit with the piece of code below. The var msg1 and msg2 part is what i´ve added but it´s not working atm What I want to achieve is when a MQTT message/object conains a topic with PM10 or PM2.5 then retri…

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## [Windows 8.1 node-red-contrib-machine-learning](https://discourse.nodered.org/t/windows-8-1-node-red-contrib-machine-learning/2827)

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**Author:** [@digital.learner](https://discourse.nodered.org/u/digital.learner)\
**Replies:** 7\
**Last updated:** [4 September 2018 19:16 UTC](https://discourse.nodered.org/t/windows-8-1-node-red-contrib-machine-learning/2827 "2018-09-04T19:16:38Z")

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Hello, I am trying to use node red machine learning package (node-red-contrib-machine-learning) on windows 8.1. I could not make it work. I have checked few posts regarding issues running this package on windows. Is the…

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## [Raspberry Pi Install Not Restarting After Installing From Manage Pallet](https://discourse.nodered.org/t/raspberry-pi-install-not-restarting-after-installing-from-manage-pallet/2835)

<div class="topic-metadata">

**Author:** [@Patrick](https://discourse.nodered.org/u/Patrick)\
**Replies:** 21\
**Last updated:** [4 September 2018 17:06 UTC](https://discourse.nodered.org/t/raspberry-pi-install-not-restarting-after-installing-from-manage-pallet/2835 "2018-09-04T17:06:48Z")

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Hi, I have Rasbian Stretch Lite set up in read only mode and installed NodeRED with the script (as per the website). Using manage pallet to install the dashboard works fine. But after a reboot NodeRED does not start. s…

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## [Split stream into multiple values](https://discourse.nodered.org/t/split-stream-into-multiple-values/2700)

<div class="topic-metadata">

**Author:** [@jfehl](https://discourse.nodered.org/u/jfehl)\
**Replies:** 12\
**Last updated:** [4 September 2018 16:14 UTC](https://discourse.nodered.org/t/split-stream-into-multiple-values/2700 "2018-09-04T16:14:04Z")

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I found a very similar topic by doing a search, but did not know how to become part of that conversation. "Node-RED ›" "How to split string, multiple values inside string to separate output." In that conversation Nick…

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## [How set the output variable "{{msg.payload}}" in JS?!](https://discourse.nodered.org/t/how-set-the-output-variable-msg-payload-in-js/657)

<div class="topic-metadata">

**Author:** [@imadouino](https://discourse.nodered.org/u/imadouino)\
**Replies:** 27\
**Last updated:** [4 September 2018 15:40 UTC](https://discourse.nodered.org/t/how-set-the-output-variable-msg-payload-in-js/657 "2018-09-04T15:40:39Z")

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that’s my flow. \[1\] my function return a array 2D \[2\] ad you see in my debug i can to show it. \[3\] but i can’t set the variable in script js!!?? \[4\] \[5\] How i can do that!!! Thank you fooor your hellp !!

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## [Timing of events and notification if something doesn't happen](https://discourse.nodered.org/t/timing-of-events-and-notification-if-something-doesnt-happen/2790)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 17\
**Last updated:** [4 September 2018 08:53 UTC](https://discourse.nodered.org/t/timing-of-events-and-notification-if-something-doesnt-happen/2790 "2018-09-04T08:53:26Z")

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Before you read any further: Sorry. This is not entirely thought through on how to describe it. But I am trying to get my head around how to do this little thing: Machine comes online. Tick. Got that. Done with…

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## [TCP request re-use](https://discourse.nodered.org/t/tcp-request-re-use/2825)

<div class="topic-metadata">

**Author:** [@Kallb123](https://discourse.nodered.org/u/Kallb123)\
**Replies:** 3\
**Last updated:** [4 September 2018 08:29 UTC](https://discourse.nodered.org/t/tcp-request-re-use/2825 "2018-09-04T08:29:58Z")

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I have a device I want to query with a specific sequence of commands. I have used the TCP request node, which sends the first message fine. I can see the message go out in Wireshark and get an acknowledgment. The acknowl…

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## [Fix broken Pi install](https://discourse.nodered.org/t/fix-broken-pi-install/2822)

<div class="topic-metadata">

**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 5\
**Last updated:** [4 September 2018 08:01 UTC](https://discourse.nodered.org/t/fix-broken-pi-install/2822 "2018-09-04T08:01:53Z")

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OK - I'm normally on other end of such problems but I'm sitting here stumped as to where to start with this one! I had a Pi3 connected to Neopixel cube, programmed with Node-RED and decided to take it to a Raspberry Ja…

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## [Reading csv file](https://discourse.nodered.org/t/reading-csv-file/2687)

<div class="topic-metadata">

**Author:** [@andy\_karl](https://discourse.nodered.org/u/andy_karl)\
**Replies:** 16\
**Last updated:** [4 September 2018 06:22 UTC](https://discourse.nodered.org/t/reading-csv-file/2687 "2018-09-04T06:22:15Z")

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Hi everyone I'm trying to get my heatpump logging into my smarthome. Have set up Node-red up and running. My heatpump loggings are accessable over http in my local network. The file is generated everyday and has this p…

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## [Issue with microphone](https://discourse.nodered.org/t/issue-with-microphone/2813)

<div class="topic-metadata">

**Author:** [@mshaz](https://discourse.nodered.org/u/mshaz)\
**Replies:** 1\
**Last updated:** [4 September 2018 00:08 UTC](https://discourse.nodered.org/t/issue-with-microphone/2813 "2018-09-04T00:08:40Z")

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Hi I tested the flow individually it was working but when i connect to mic it has this problem.

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## [Execute Arduino from exec node](https://discourse.nodered.org/t/execute-arduino-from-exec-node/2772)

<div class="topic-metadata">

**Author:** [@tmwai](https://discourse.nodered.org/u/tmwai)\
**Replies:** 3\
**Last updated:** [3 September 2018 19:23 UTC](https://discourse.nodered.org/t/execute-arduino-from-exec-node/2772 "2018-09-03T19:23:50Z")

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Hi there, I am trying to call the arduino cli (ps now they support) from exec node in Window 10. I got code 0 and access denied error. How can I solve it? please. PS. For arduino, I use arduino by downloading compresse…

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## [Raspbian install script vs. "add software" for node-red?](https://discourse.nodered.org/t/raspbian-install-script-vs-add-software-for-node-red/2807)

<div class="topic-metadata">

**Author:** [@wb666greene](https://discourse.nodered.org/u/wb666greene)\
**Replies:** 4\
**Last updated:** [3 September 2018 16:29 UTC](https://discourse.nodered.org/t/raspbian-install-script-vs-add-software-for-node-red/2807 "2018-09-03T16:29:38Z")

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The recent thread about installation problems on a Pi3 has motivated me be ask about this. I recently setup a PiZero-W using the full gui image. I find it easier to set things up initially with the gui and a KVM, and a…

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## [Import an existing project with its git history](https://discourse.nodered.org/t/import-an-existing-project-with-its-git-history/2797)

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**Author:** [@bebR](https://discourse.nodered.org/u/bebR)\
**Replies:** 3\
**Last updated:** [3 September 2018 12:51 UTC](https://discourse.nodered.org/t/import-an-existing-project-with-its-git-history/2797 "2018-09-03T12:51:23Z")

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Hi, I started to use Node-RED a few weeks ago. Actually, this was just to test and see if I can use it for a home security system. As usual, I created a git repository from the node-red folder and made commits. Now tha…

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## [What msg property naming scheme to use?](https://discourse.nodered.org/t/what-msg-property-naming-scheme-to-use/2764)

<div class="topic-metadata">

**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 9\
**Last updated:** [3 September 2018 12:29 UTC](https://discourse.nodered.org/t/what-msg-property-naming-scheme-to-use/2764 "2018-09-03T12:29:38Z")

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Is there a consensus/recommendation on how to assign names to msg property values for contrib or shared function nodes? My present dilemma is that I have developed a colour name conversion node that takes in a colour na…

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## [Advice please on best way to attack this](https://discourse.nodered.org/t/advice-please-on-best-way-to-attack-this/2719)

<div class="topic-metadata">

**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 18\
**Last updated:** [3 September 2018 09:50 UTC](https://discourse.nodered.org/t/advice-please-on-best-way-to-attack-this/2719 "2018-09-03T09:50:03Z")

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Guys, I have a value being sent across by MQTT (actually a string but then i convert it to an Int) - the number is a binary representation of the state of pins on a Arduino - each of the pins represents a state for a de…

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## [And again more confustion about error handling](https://discourse.nodered.org/t/and-again-more-confustion-about-error-handling/2759)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 16\
**Last updated:** [2 September 2018 14:04 UTC](https://discourse.nodered.org/t/and-again-more-confustion-about-error-handling/2759 "2018-09-02T14:04:50Z")

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Ok, at the beginning I was silly. I didn't get all the quirks with MQTT and msg.error. I think I have moved forward from there but "it" still doesn't seem to be working. Though the long way, I'll start with knowns and…

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## [Suggested Approach please](https://discourse.nodered.org/t/suggested-approach-please/2682)

<div class="topic-metadata">

**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 7\
**Last updated:** [2 September 2018 23:45 UTC](https://discourse.nodered.org/t/suggested-approach-please/2682 "2018-09-02T23:45:33Z")

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Guys, I have an MQTT message that comes in from a Arduino to my Node-red. This String when received is essentially a binary representation of the state of output pins on the Arduino - so i might see a value like 176, 160…

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## [Timer function with UI input](https://discourse.nodered.org/t/timer-function-with-ui-input/2747)

<div class="topic-metadata">

**Author:** [@flow](https://discourse.nodered.org/u/flow)\
**Replies:** 4\
**Last updated:** [2 September 2018 22:54 UTC](https://discourse.nodered.org/t/timer-function-with-ui-input/2747 "2018-09-02T22:54:23Z")

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Hello there! I am completely new to this fascinating area about node-red and using a raspberry pi. Also I am new to programming in any languages like java etc. My first project i'd like to make is controlling our heat…

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## [A URL to call/execute a node red flow?](https://discourse.nodered.org/t/a-url-to-call-execute-a-node-red-flow/2674)

<div class="topic-metadata">

**Author:** [@nodecentral](https://discourse.nodered.org/u/nodecentral)\
**Replies:** 21\
**Last updated:** [2 September 2018 21:47 UTC](https://discourse.nodered.org/t/a-url-to-call-execute-a-node-red-flow/2674 "2018-09-02T21:47:17Z")

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Hi is it possible to call/execute a node flow via an simple http request /url from any standard browser ? I was looking in here http://nodered.org/docs/api/admin/methods/ but could not see anything specific, I would as…

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## [Create dynamic urls for TTS](https://discourse.nodered.org/t/create-dynamic-urls-for-tts/2763)

<div class="topic-metadata">

**Author:** [@nodecentral](https://discourse.nodered.org/u/nodecentral)\
**Replies:** 2\
**Last updated:** [2 September 2018 14:34 UTC](https://discourse.nodered.org/t/create-dynamic-urls-for-tts/2763 "2018-09-02T14:34:45Z")

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Hi I have a TTS set up at home where I can send formatted URLs to be spoken out via my Sonos set up (via a Sonos-http engine, with an Amazon Polly speech config). The URLs that need to be created are like the following …

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## [RED.notify from node backend](https://discourse.nodered.org/t/red-notify-from-node-backend/2753)

<div class="topic-metadata">

**Author:** [@CatalinFetoiu](https://discourse.nodered.org/u/CatalinFetoiu)\
**Replies:** 1\
**Last updated:** [1 September 2018 22:24 UTC](https://discourse.nodered.org/t/red-notify-from-node-backend/2753 "2018-09-01T22:24:45Z")

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Hello, How can I use RED.notify from the backend of a node (for example for showing an information when a certain message arrives at the node)? I managed to use that call only from the frontend. Thank you, Catalin

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## [Node Red IBM Cloud](https://discourse.nodered.org/t/node-red-ibm-cloud/2744)

<div class="topic-metadata">

**Author:** [@mtoko](https://discourse.nodered.org/u/mtoko)\
**Replies:** 3\
**Last updated:** [1 September 2018 14:29 UTC](https://discourse.nodered.org/t/node-red-ibm-cloud/2744 "2018-09-01T14:29:47Z")

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Hi I have a NR app running on IBM Cloud and it was working great until I stopped the app and then restarted it. I had installed additional nodes from the pallette (Dashboard) and when restarted these were no longer inst…

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## [Help with mqtt garage door logic](https://discourse.nodered.org/t/help-with-mqtt-garage-door-logic/2708)

<div class="topic-metadata">

**Author:** [@j0hncc](https://discourse.nodered.org/u/j0hncc)\
**Replies:** 8\
**Last updated:** [1 September 2018 06:22 UTC](https://discourse.nodered.org/t/help-with-mqtt-garage-door-logic/2708 "2018-09-01T06:22:36Z")

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I am fairly new to node-red but have had a lot of success with it so far with thermostats, thermometers and my esp8266/mqtt garage door controller. I want to implement in NR this logic: "At 9pm every night, if the garag…

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## [Custom icons for nodes](https://discourse.nodered.org/t/custom-icons-for-nodes/2735)

<div class="topic-metadata">

**Author:** [@tilleul](https://discourse.nodered.org/u/tilleul)\
**Replies:** 2\
**Last updated:** [31 August 2018 20:25 UTC](https://discourse.nodered.org/t/custom-icons-for-nodes/2735 "2018-08-31T20:25:02Z")

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Node-RED 0.19.x allows to customize the icon of each node. It seems to search for all available icons in the "traditional" nodes as well as in the "node-red-contrib" nodes ... but it seems to retrieve only PNG files and …

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