# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=728

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

**Page:** 729

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## [Help debugging "random" node-red-node-ping 0.2.0 crash](https://discourse.nodered.org/t/help-debugging-random-node-red-node-ping-0-2-0-crash/28829)

<div class="topic-metadata">

**Author:** [@redDawn](https://discourse.nodered.org/u/redDawn)\
**Replies:** 5\
**Last updated:** [23 June 2020 23:13 UTC](https://discourse.nodered.org/t/help-debugging-random-node-red-node-ping-0-2-0-crash/28829 "2020-06-23T23:13:00Z")

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Hello all, Attached is the relevant log. I get these random crashes with the ping node. I looked at the code and there does appear to be an "on" property. I just can't track this down. Any ideas on how to track this…

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## [I need MQTT node that have input and output](https://discourse.nodered.org/t/i-need-mqtt-node-that-have-input-and-output/28451)

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**Author:** [@denisjoshua](https://discourse.nodered.org/u/denisjoshua)\
**Replies:** 40\
**Last updated:** [23 June 2020 22:37 UTC](https://discourse.nodered.org/t/i-need-mqtt-node-that-have-input-and-output/28451 "2020-06-23T22:37:28Z")

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I there all, I so there is MQTT node that cab be used to input and the other one that can be used like output. But how can I use a MQTT node that have also input and also output please ? I wonder how can I use a node-…

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## [Node-Red Email and GMail Folders](https://discourse.nodered.org/t/node-red-email-and-gmail-folders/28453)

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**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 2\
**Last updated:** [23 June 2020 22:30 UTC](https://discourse.nodered.org/t/node-red-email-and-gmail-folders/28453 "2020-06-23T22:30:09Z")

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Guys, I know GMail does not really support the concept of folders - but using IMAP tags and labels it appears that they are folders to IMAP clients. Does anyone know (or has tried) to poll a single IMAP folder on Gmail…

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## [Nodes Installieren Palette Verwalten](https://discourse.nodered.org/t/nodes-installieren-palette-verwalten/28844)

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**Author:** [@Rappsj](https://discourse.nodered.org/u/Rappsj)\
**Replies:** 1\
**Last updated:** [23 June 2020 20:21 UTC](https://discourse.nodered.org/t/nodes-installieren-palette-verwalten/28844 "2020-06-23T20:21:49Z")

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Hallo Leute ich brauche eure Hilfe, ich bin Neu im Thema und wollte die KNX Node Installieren dazu gibt es ja zahlreichen tutorials im Netz.denoch schaffe ich es Nicht bei mir wir der Menüpunkt Paletten Verwalten nicht a…

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## [Old code deploys after reboot](https://discourse.nodered.org/t/old-code-deploys-after-reboot/28803)

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**Author:** [@sallen135](https://discourse.nodered.org/u/sallen135)\
**Replies:** 6\
**Last updated:** [23 June 2020 19:26 UTC](https://discourse.nodered.org/t/old-code-deploys-after-reboot/28803 "2020-06-23T19:26:54Z")

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Recently when my Pi restarts, the node red code that it loads is not the latest. I can make changes and deploy (both full and modified nodes) and the changes work and remain. If the pi restarts, these changes are no long…

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## [Node-red-log to file](https://discourse.nodered.org/t/node-red-log-to-file/27683)

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**Author:** [@StrongTown](https://discourse.nodered.org/u/StrongTown)\
**Replies:** 17\
**Last updated:** [23 June 2020 18:58 UTC](https://discourse.nodered.org/t/node-red-log-to-file/27683 "2020-06-23T18:58:14Z")

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By now my node-red application is fairly complex. I have 19 tabs each with many nodes and all with some form of unique function coding, many that are extensive. While it seems to run as expected for lengthy periods (days…

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## [Using msg.payload in a SQL query](https://discourse.nodered.org/t/using-msg-payload-in-a-sql-query/15995)

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**Author:** [@kresten88](https://discourse.nodered.org/u/kresten88)\
**Replies:** 7\
**Last updated:** [23 June 2020 18:05 UTC](https://discourse.nodered.org/t/using-msg-payload-in-a-sql-query/15995 "2020-06-23T18:05:42Z")

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This might be a simple one... When I select a value from a dropdownlist the msg.payload is e.g. 1E6 Now I would like to use that msg.payload to make a query (mysql node) However I cannot find a working function for th…

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## [Setting the timer in node-red function node for few milliseconds](https://discourse.nodered.org/t/setting-the-timer-in-node-red-function-node-for-few-milliseconds/28622)

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**Author:** [@Waled22](https://discourse.nodered.org/u/Waled22)\
**Replies:** 16\
**Last updated:** [23 June 2020 16:45 UTC](https://discourse.nodered.org/t/setting-the-timer-in-node-red-function-node-for-few-milliseconds/28622 "2020-06-23T16:45:47Z")

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Hi, I have been looking for a way to set the timer for a few milliseconds in the function node. Actually the scenario is that the function node is receiving the data coming from the sensor which sends this data when an…

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## [Apple TV Node - Reinstall ed25519](https://discourse.nodered.org/t/apple-tv-node-reinstall-ed25519/28754)

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**Author:** [@yyjdennis](https://discourse.nodered.org/u/yyjdennis)\
**Replies:** 7\
**Last updated:** [23 June 2020 14:39 UTC](https://discourse.nodered.org/t/apple-tv-node-reinstall-ed25519/28754 "2020-06-23T14:39:20Z")

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I'm trying to get the Contrib Apple TV node to work. It won't install and there are error messages in the log which mention ed25519. The documentation for the node says: "If you're having trouble with ed25519, mdns, …

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## [Problem on platerecognizer.com with node red and rapsberry pi](https://discourse.nodered.org/t/problem-on-platerecognizer-com-with-node-red-and-rapsberry-pi/28768)

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**Author:** [@xy06](https://discourse.nodered.org/u/xy06)\
**Replies:** 2\
**Last updated:** [23 June 2020 14:26 UTC](https://discourse.nodered.org/t/problem-on-platerecognizer-com-with-node-red-and-rapsberry-pi/28768 "2020-06-23T14:26:16Z")

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I have some problems with the node-red-contrib-plate-recognizer. It get "bad request" after recognizing the picture that capture by raspberry pi camera module. Is there any suggestion to solve it?

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## [Node Development config-node missing create new button and dropdown](https://discourse.nodered.org/t/node-development-config-node-missing-create-new-button-and-dropdown/28798)

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**Author:** [@Czerwe](https://discourse.nodered.org/u/Czerwe)\
**Replies:** 4\
**Last updated:** [23 June 2020 12:52 UTC](https://discourse.nodered.org/t/node-development-config-node-missing-create-new-button-and-dropdown/28798 "2020-06-23T12:52:18Z")

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Hi, i am quite new to JavaScript/Node/NodeRed development but not to coding as it. I did follow following this tutorial but fail to get an dialog to create a new Configuration Node. I whould like to have a drop down o…

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## [How to using React in NodeRed](https://discourse.nodered.org/t/how-to-using-react-in-nodered/28788)

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**Author:** [@vahidsam](https://discourse.nodered.org/u/vahidsam)\
**Replies:** 1\
**Last updated:** [23 June 2020 11:51 UTC](https://discourse.nodered.org/t/how-to-using-react-in-nodered/28788 "2020-06-23T11:51:14Z")

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Hi all, I have a tiny project with "react" implemented and now I want to migrate to NodeRed. But I dont know, how can I do this hier is index.html: \<!DOCTYPE html\> \<html lang="en"\> \<head\> \<title\>Comments\</title\> …

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## [Build an XML file](https://discourse.nodered.org/t/build-an-xml-file/25370)

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**Author:** [@caveman](https://discourse.nodered.org/u/caveman)\
**Replies:** 6\
**Last updated:** [23 June 2020 10:37 UTC](https://discourse.nodered.org/t/build-an-xml-file/25370 "2020-06-23T10:37:28Z")

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Hi all, it is maybe an simple topic but i have not found an solution... maybe i have not read very well the doc... i need to build an xml file that have this structure: \<?xml version="1.0" ?\> \<pcis:PCISDocument xmln…

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## [I don't understand why I am getting this error](https://discourse.nodered.org/t/i-dont-understand-why-i-am-getting-this-error/28791)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 1\
**Last updated:** [23 June 2020 09:58 UTC](https://discourse.nodered.org/t/i-dont-understand-why-i-am-getting-this-error/28791 "2020-06-23T09:58:01Z")

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I am seeing this error: Error: Invalid property expression: unexpected ' ' at position 7 This is the node (change node) \[{"id":"515a1c91.ae5a8c","type":"change","z":"bdc47459.27c378","name":"flow set Channel Passed","…

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## [Range error - The value "NaN" is invalid](https://discourse.nodered.org/t/range-error-the-value-nan-is-invalid/28778)

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**Author:** [@jan12](https://discourse.nodered.org/u/jan12)\
**Replies:** 26\
**Last updated:** [23 June 2020 08:08 UTC](https://discourse.nodered.org/t/range-error-the-value-nan-is-invalid/28778 "2020-06-23T08:08:06Z")

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Got a big problem with a range error. I've tried to uninstal and instal js again but still the same problem. Can any help have I solve it. Thanks Jan

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## [Help JSONata Expression](https://discourse.nodered.org/t/help-jsonata-expression/28767)

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**Author:** [@mikeh](https://discourse.nodered.org/u/mikeh)\
**Replies:** 4\
**Last updated:** [23 June 2020 07:26 UTC](https://discourse.nodered.org/t/help-jsonata-expression/28767 "2020-06-23T07:26:23Z")

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I need help with this JSONata Expression. It's not working...

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## [LED Brightness, for(), dash board slider, dimming](https://discourse.nodered.org/t/led-brightness-for-dash-board-slider-dimming/28706)

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**Author:** [@seyeon](https://discourse.nodered.org/u/seyeon)\
**Replies:** 12\
**Last updated:** [23 June 2020 06:18 UTC](https://discourse.nodered.org/t/led-brightness-for-dash-board-slider-dimming/28706 "2020-06-23T06:18:55Z")

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How can I slowly increase the brightness of a light in Node-red?. apply for() to the Dashboard with slider...Or what else?

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## [Send capture snapshot url photo from motioneye to pushover](https://discourse.nodered.org/t/send-capture-snapshot-url-photo-from-motioneye-to-pushover/28549)

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**Author:** [@mversion](https://discourse.nodered.org/u/mversion)\
**Replies:** 3\
**Last updated:** [23 June 2020 06:15 UTC](https://discourse.nodered.org/t/send-capture-snapshot-url-photo-from-motioneye-to-pushover/28549 "2020-06-23T06:15:20Z")

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So I have motion eye setup with a snapshot URL for a camera. my idea is if motion is detected, send the captured image via pushover so I get a push notification with the image. via the http request node, i can easily se…

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## [Trying to save numeric input to varible and recall it for funtion input](https://discourse.nodered.org/t/trying-to-save-numeric-input-to-varible-and-recall-it-for-funtion-input/28697)

<div class="topic-metadata">

**Author:** [@rmystique](https://discourse.nodered.org/u/rmystique)\
**Replies:** 2\
**Last updated:** [23 June 2020 05:49 UTC](https://discourse.nodered.org/t/trying-to-save-numeric-input-to-varible-and-recall-it-for-funtion-input/28697 "2020-06-23T05:49:49Z")

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I am trying to use a numeric input to be able to adjust a timer off delay, but becuase the numeric input node only sends when changed I am trying to save the value to a varible and have a function use that varible to add…

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## [How to using environment variables in the subflow](https://discourse.nodered.org/t/how-to-using-environment-variables-in-the-subflow/28773)

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**Author:** [@jinyistudio](https://discourse.nodered.org/u/jinyistudio)\
**Replies:** 1\
**Last updated:** [23 June 2020 04:37 UTC](https://discourse.nodered.org/t/how-to-using-environment-variables-in-the-subflow/28773 "2020-06-23T04:37:17Z")

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Hi I add a environment variables in the subflow. name is PinNumber and type is string. I have a Function node in this subflow. How to access PinNumber in the Function node ? :joy: \[{"id":"f89b2c94.be924","type":"func-e…

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## [Msg.object change number](https://discourse.nodered.org/t/msg-object-change-number/28716)

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**Author:** [@seyeon](https://discourse.nodered.org/u/seyeon)\
**Replies:** 6\
**Last updated:** [23 June 2020 02:16 UTC](https://discourse.nodered.org/t/msg-object-change-number/28716 "2020-06-23T02:16:54Z")

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Hello :slight\_smile: : I try to change the Object to number... Can I export the brightness value of the msg : Object as a number? What if I could...

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## [Receive real time data](https://discourse.nodered.org/t/receive-real-time-data/28702)

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**Author:** [@seyeon](https://discourse.nodered.org/u/seyeon)\
**Replies:** 10\
**Last updated:** [23 June 2020 01:51 UTC](https://discourse.nodered.org/t/receive-real-time-data/28702 "2020-06-23T01:51:33Z")

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Receive real-time data once every 10 seconds. I'm a student and beginner. I want to average the data. (by 10 times) I think... First, sort the data that is measured once every 10 seconds... I've tried many times, b…

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## [How to use msg.payload or global variables in postgrestor node?](https://discourse.nodered.org/t/how-to-use-msg-payload-or-global-variables-in-postgrestor-node/28712)

<div class="topic-metadata">

**Author:** [@xiao1201](https://discourse.nodered.org/u/xiao1201)\
**Replies:** 4\
**Last updated:** [23 June 2020 00:52 UTC](https://discourse.nodered.org/t/how-to-use-msg-payload-or-global-variables-in-postgrestor-node/28712 "2020-06-23T00:52:34Z")

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Hi there, so I'm using postgrestor node in NR and am able to do some sql operations by the postgrestor node just fine. My question is: how to use msg.payload or NR global varaible in the postgrestor node because the post…

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## [Mysql node not working properly](https://discourse.nodered.org/t/mysql-node-not-working-properly/28746)

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**Author:** [@jnbest00](https://discourse.nodered.org/u/jnbest00)\
**Replies:** 3\
**Last updated:** [22 June 2020 22:08 UTC](https://discourse.nodered.org/t/mysql-node-not-working-properly/28746 "2020-06-22T22:08:39Z")

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Hello, Im trying to connect to a MySQL database via the node-red-node-mysql. After I enter the appropriate info it reads back an error msg 'Error: Cannot find module './protocol/constants/client'. Does anyone know a solu…

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## [Raspberry Pi vs. Linux Virtual Machine](https://discourse.nodered.org/t/raspberry-pi-vs-linux-virtual-machine/28577)

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**Author:** [@BrainBomber100](https://discourse.nodered.org/u/BrainBomber100)\
**Replies:** 9\
**Last updated:** [22 June 2020 22:01 UTC](https://discourse.nodered.org/t/raspberry-pi-vs-linux-virtual-machine/28577 "2020-06-22T22:01:30Z")

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Hello! I was wondering whether it would be more cost-efficient to run my own Node Red server on a Raspberry Pi or a virtual machine on my laptop. I don't exactly have a spare computer lying around to use as a server, so …

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## [Please help simplify this. Multiple IFs to one Output](https://discourse.nodered.org/t/please-help-simplify-this-multiple-ifs-to-one-output/28755)

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**Author:** [@CaptainSweatpants](https://discourse.nodered.org/u/CaptainSweatpants)\
**Replies:** 2\
**Last updated:** [22 June 2020 21:21 UTC](https://discourse.nodered.org/t/please-help-simplify-this-multiple-ifs-to-one-output/28755 "2020-06-22T21:21:53Z")

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Ok, clearly I’m not familiar with JS super well; but what this flow does is grab all the properties of my Ecobee Thermostat’s Outside Weather conditions and then start filtering them off to ultimately end up at a functio…

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## [Get Alexa to show green notifications](https://discourse.nodered.org/t/get-alexa-to-show-green-notifications/28759)

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**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 0\
**Last updated:** [22 June 2020 20:57 UTC](https://discourse.nodered.org/t/get-alexa-to-show-green-notifications/28759 "2020-06-22T20:57:45Z")

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One thing I'd like to do is to be able to send notifications (like the ones you get about Prime deliveries) using Node-RED Anyone managed to do this at all?

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## [Node-red nodes and password](https://discourse.nodered.org/t/node-red-nodes-and-password/28740)

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**Author:** [@olab](https://discourse.nodered.org/u/olab)\
**Replies:** 2\
**Last updated:** [22 June 2020 19:24 UTC](https://discourse.nodered.org/t/node-red-nodes-and-password/28740 "2020-06-22T19:24:34Z")

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Hi, There are quite a few different nodes available to conect Note-red to different systems like SQL, Samba, MQTT etc. Most of them need a password to work of course. But, how safe is this passwords actually stored. Are…

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## [Watson Assistant "context variable"](https://discourse.nodered.org/t/watson-assistant-context-variable/28751)

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**Author:** [@SufyanParkar](https://discourse.nodered.org/u/SufyanParkar)\
**Replies:** 0\
**Last updated:** [22 June 2020 19:08 UTC](https://discourse.nodered.org/t/watson-assistant-context-variable/28751 "2020-06-22T19:08:26Z")

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I am using Node-RED for making a UI, this UI has a registration form with input fields as: Name: Email: Age: Phone no. my goal here is to have my Watson Assistant know the name of the user before the user starts to ch…

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## [IF Statement for two DS18B20 Sensors](https://discourse.nodered.org/t/if-statement-for-two-ds18b20-sensors/28280)

<div class="topic-metadata">

**Author:** [@Los\_Andros](https://discourse.nodered.org/u/Los_Andros)\
**Replies:** 31\
**Last updated:** [22 June 2020 16:52 UTC](https://discourse.nodered.org/t/if-statement-for-two-ds18b20-sensors/28280 "2020-06-22T16:52:52Z")

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Dear Node Red Community, as part of an university project did I connect two DS18B20 sensors (via a Rasperry Pi) to Node Red. My goal is to insert a function flow, which will alert the user if both sensors show a payloa…

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