# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=636

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

**Page:** 637

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## [Email node: Can the sender information and password have been entered?](https://discourse.nodered.org/t/email-node-can-the-sender-information-and-password-have-been-entered/37604)

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**Author:** [@minhhn0205](https://discourse.nodered.org/u/minhhn0205)\
**Replies:** 3\
**Last updated:** [18 December 2020 01:14 UTC](https://discourse.nodered.org/t/email-node-can-the-sender-information-and-password-have-been-entered/37604 "2020-12-18T01:14:12Z")

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Hi, I want to evaluate whether the sender information and password have been entered in the email node. Is that possible? Thanks in advance!

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## [Dictionary object in Context](https://discourse.nodered.org/t/dictionary-object-in-context/37628)

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**Author:** [@zoltansz](https://discourse.nodered.org/u/zoltansz)\
**Replies:** 14\
**Last updated:** [17 December 2020 21:00 UTC](https://discourse.nodered.org/t/dictionary-object-in-context/37628 "2020-12-17T21:00:14Z")

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Hi there, I connected my flow to my paradox alarm system. It sends events when a door or window is opened or closed. I would like to keep the states of all sensors in a dictionary that is available for all my flows. I…

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## [Flow is not loading after project copied to another pc](https://discourse.nodered.org/t/flow-is-not-loading-after-project-copied-to-another-pc/37674)

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**Author:** [@Norberg95](https://discourse.nodered.org/u/Norberg95)\
**Replies:** 3\
**Last updated:** [17 December 2020 20:43 UTC](https://discourse.nodered.org/t/flow-is-not-loading-after-project-copied-to-another-pc/37674 "2020-12-17T20:43:04Z")

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I would like to copy my app with embedded node-red to another pc, but when I start the app on the new pc node-red is not loading my flows. Everything is loading perfectly, I have all the installed community nodes in the …

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## [MicroPi not running properly](https://discourse.nodered.org/t/micropi-not-running-properly/37408)

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**Author:** [@kart-able](https://discourse.nodered.org/u/kart-able)\
**Replies:** 32\
**Last updated:** [17 December 2020 18:58 UTC](https://discourse.nodered.org/t/micropi-not-running-properly/37408 "2020-12-17T18:58:04Z")

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Hello to all, I am trying to have MicroPi work, but I can't. Why is that? Is there something specific I must undestand before? I have tried with the MicroPi Microphone Wav-Filewriter \[Demo Flow\] and of course installed…

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## [How to send "False" when there is no Flow?](https://discourse.nodered.org/t/how-to-send-false-when-there-is-no-flow/37593)

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**Author:** [@Steinspiel](https://discourse.nodered.org/u/Steinspiel)\
**Replies:** 8\
**Last updated:** [17 December 2020 18:29 UTC](https://discourse.nodered.org/t/how-to-send-false-when-there-is-no-flow/37593 "2020-12-17T18:29:10Z")

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Hello, I would be happy if someone can help me solve my problem. An "mqtt-in" receives every five seconds the signal strength of my Bluetooth device. If the "MQTT broker" sends "-67", for example, the "switch-node" fo…

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## [Using Google Sheets to Manage Configs and 'Array of Objects' Data](https://discourse.nodered.org/t/using-google-sheets-to-manage-configs-and-array-of-objects-data/37661)

<div class="topic-metadata">

**Author:** [@dudleyjosh](https://discourse.nodered.org/u/dudleyjosh)\
**Replies:** 5\
**Last updated:** [17 December 2020 18:07 UTC](https://discourse.nodered.org/t/using-google-sheets-to-manage-configs-and-array-of-objects-data/37661 "2020-12-17T18:07:37Z")

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I'm just sharing a pattern I've used over-and-over with my various Node-RED projects that has worked really well for me in case others might find it useful (or perhaps this is commonplace and I am just late to the game). …

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## [Best practice for creating APIs that can be called from other domains](https://discourse.nodered.org/t/best-practice-for-creating-apis-that-can-be-called-from-other-domains/37657)

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**Author:** [@tim-m](https://discourse.nodered.org/u/tim-m)\
**Replies:** 1\
**Last updated:** [17 December 2020 18:03 UTC](https://discourse.nodered.org/t/best-practice-for-creating-apis-that-can-be-called-from-other-domains/37657 "2020-12-17T18:03:01Z")

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Hi! I'm building a number of APIs via NodeRED (on a Cloud) that I want to expose and want to get it right in terms of security and cors. I've secured the routes exposed by the HTTP In nodes using basic authentication. I …

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## [Have Objects in msg, need to take actions based on one of the payload codes](https://discourse.nodered.org/t/have-objects-in-msg-need-to-take-actions-based-on-one-of-the-payload-codes/37451)

<div class="topic-metadata">

**Author:** [@Tomadoggy](https://discourse.nodered.org/u/Tomadoggy)\
**Replies:** 63\
**Last updated:** [17 December 2020 17:09 UTC](https://discourse.nodered.org/t/have-objects-in-msg-need-to-take-actions-based-on-one-of-the-payload-codes/37451 "2020-12-17T17:09:45Z")

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Hello, I am using rtl\_433 in my node red project and have the need to take actions within node red based upon the data within payload.code of my (msg.payload : Object). Here is an example of the message from the rtl\_433…

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## [MQTT in Node - sort/switch the input](https://discourse.nodered.org/t/mqtt-in-node-sort-switch-the-input/37603)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 7\
**Last updated:** [17 December 2020 15:03 UTC](https://discourse.nodered.org/t/mqtt-in-node-sort-switch-the-input/37603 "2020-12-17T15:03:20Z")

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Hello i have some msg.payload coming from a Raspi-with433MHz Dongel. They nicely drop in Node Red MQTT IN with output a parsed JSON object The Question how do i splitt the Message to use them and later add to InfluxDB…

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## [Http-in get Request IP/Address](https://discourse.nodered.org/t/http-in-get-request-ip-address/3067)

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**Author:** [@gdomod](https://discourse.nodered.org/u/gdomod)\
**Replies:** 3\
**Last updated:** [17 December 2020 14:29 UTC](https://discourse.nodered.org/t/http-in-get-request-ip-address/3067 "2020-12-17T14:29:00Z")

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Hi there, its possible to get the client ip address at request ? i read that http-in based on expressjs but there is no msg.req.ip can anybody help me please

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## [Reseting context at beginning of flow](https://discourse.nodered.org/t/reseting-context-at-beginning-of-flow/37308)

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**Author:** [@Present](https://discourse.nodered.org/u/Present)\
**Replies:** 10\
**Last updated:** [17 December 2020 14:28 UTC](https://discourse.nodered.org/t/reseting-context-at-beginning-of-flow/37308 "2020-12-17T14:28:43Z")

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I have a function node where I use the context to save the information of several incoming messages. But I figured that the context lives, still after the flow restartet. Is there an elegant way of doing that? Here is …

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## [Uninstalling uibuilder node](https://discourse.nodered.org/t/uninstalling-uibuilder-node/37594)

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**Author:** [@adamelli](https://discourse.nodered.org/u/adamelli)\
**Replies:** 18\
**Last updated:** [17 December 2020 14:03 UTC](https://discourse.nodered.org/t/uninstalling-uibuilder-node/37594 "2020-12-17T14:03:37Z")

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I was trying to get the uibuilder node to work to implement a custom dashboard. I got to this page: So instead, at first I tried removing and disabling from the Palette. Then I did this: npm uninstall node-red-con…

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## [Select audio output](https://discourse.nodered.org/t/select-audio-output/37483)

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**Author:** [@Andrefs](https://discourse.nodered.org/u/Andrefs)\
**Replies:** 2\
**Last updated:** [17 December 2020 13:19 UTC](https://discourse.nodered.org/t/select-audio-output/37483 "2020-12-17T13:19:47Z")

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Hello everyone, I want to play music (probably from youtube or Spotify in the future) in a desktop using node red. My ideia is to use multiple outputs in order to select which outputs i want to play in that moment. Som…

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## [Change font-size of unit value in artless gauges](https://discourse.nodered.org/t/change-font-size-of-unit-value-in-artless-gauges/37629)

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**Author:** [@Niklas](https://discourse.nodered.org/u/Niklas)\
**Replies:** 4\
**Last updated:** [17 December 2020 12:11 UTC](https://discourse.nodered.org/t/change-font-size-of-unit-value-in-artless-gauges/37629 "2020-12-17T12:11:40Z")

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Hey everyone, I'm a node-red beginner who wants to change the font-size of the "unit" which is displayed under the value in a gauge, because for my taste the size is too small. (See pictures) I didn't find a post the c…

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## [Processing int16 values](https://discourse.nodered.org/t/processing-int16-values/37425)

<div class="topic-metadata">

**Author:** [@Ianmidd](https://discourse.nodered.org/u/Ianmidd)\
**Replies:** 42\
**Last updated:** [17 December 2020 11:49 UTC](https://discourse.nodered.org/t/processing-int16-values/37425 "2020-12-17T11:49:33Z")

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Hi all, first post so apologies if I do this wrong. I’m trying to process data from Modbus and the values are mostly listed as int16. I’m seeing numbers but none of them correspond to the values I’m expecting. I was ex…

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## [Copy Node-red Install on Windows server offline](https://discourse.nodered.org/t/copy-node-red-install-on-windows-server-offline/18135)

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**Author:** [@jlb](https://discourse.nodered.org/u/jlb)\
**Replies:** 3\
**Last updated:** [12 March 2020 16:26 UTC](https://discourse.nodered.org/t/copy-node-red-install-on-windows-server-offline/18135 "2020-03-12T16:26:05Z")

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I think this question has been posted several times but i don't find any solution working...: I've got a windows server with no internet connection, so impossible to install node-red online with NPM. I tried to copy th…

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## [deploying/Importing without pressing deploy/import](https://discourse.nodered.org/t/deploying-importing-without-pressing-deploy-import/37583)

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**Author:** [@christopherm123](https://discourse.nodered.org/u/christopherm123)\
**Replies:** 6\
**Last updated:** [17 December 2020 11:01 UTC](https://discourse.nodered.org/t/deploying-importing-without-pressing-deploy-import/37583 "2020-12-17T11:01:11Z")

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Hello, I have created a flow that is able to output an importable json object, which creates it's own flow, this is based on "https://eightbar.eu-gb.mybluemix.net/2014/01/19/node-red-flows-that-make-flows/" My next step…

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## [How get json value from array](https://discourse.nodered.org/t/how-get-json-value-from-array/37626)

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**Author:** [@donalddck](https://discourse.nodered.org/u/donalddck)\
**Replies:** 2\
**Last updated:** [17 December 2020 10:54 UTC](https://discourse.nodered.org/t/how-get-json-value-from-array/37626 "2020-12-17T10:54:09Z")

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Good morning, I have a message like this: { "dataflow":\[ { "date":"Dec 17, 2020 7:20 AM", "id":2, "cod":27, "value":676 }, { "date":"Dec 17, 2020 7:22 A…

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## [Node-RED Mqtt 5 support](https://discourse.nodered.org/t/node-red-mqtt-5-support/17847)

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**Author:** [@xxGL1TCHxx](https://discourse.nodered.org/u/xxGL1TCHxx)\
**Replies:** 41\
**Last updated:** [17 December 2020 10:27 UTC](https://discourse.nodered.org/t/node-red-mqtt-5-support/17847 "2020-12-17T10:27:27Z")

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I have an existing project using Mqtt 5 (user properties, etc) and would like to tie in Node Red. However, without Mqtt 5 support, I'm not able to do this. Any recommendations?

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## [Connection to the database disappears after node js reboot](https://discourse.nodered.org/t/connection-to-the-database-disappears-after-node-js-reboot/37619)

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**Author:** [@Aklex1](https://discourse.nodered.org/u/Aklex1)\
**Replies:** 6\
**Last updated:** [17 December 2020 09:17 UTC](https://discourse.nodered.org/t/connection-to-the-database-disappears-after-node-js-reboot/37619 "2020-12-17T09:17:53Z")

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when the server with node red is rebooted, the data for connecting to the sql database will disappear - the user and password, has anyone encountered this problem?

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## [Decrypt the data on node-red](https://discourse.nodered.org/t/decrypt-the-data-on-node-red/37611)

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**Author:** [@marwinwijaya](https://discourse.nodered.org/u/marwinwijaya)\
**Replies:** 1\
**Last updated:** [17 December 2020 08:11 UTC](https://discourse.nodered.org/t/decrypt-the-data-on-node-red/37611 "2020-12-17T08:11:13Z")

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how to decrypt data on node-red? i did data encryption using md5 on node node-red-contrib-md5 thanks

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## [Connecting with AWS IoT Core Using WebSocket Protocol](https://discourse.nodered.org/t/connecting-with-aws-iot-core-using-websocket-protocol/37622)

<div class="topic-metadata">

**Author:** [@gtmanoj235](https://discourse.nodered.org/u/gtmanoj235)\
**Replies:** 0\
**Last updated:** [17 December 2020 07:35 UTC](https://discourse.nodered.org/t/connecting-with-aws-iot-core-using-websocket-protocol/37622 "2020-12-17T07:35:48Z")

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I'm trying to connect to AWS IoT Core using MQTT, WebSocket and HTTPS communication protocols. Here I'm using Node-Red as an IoT Device simulator. While doing this I'm able to successfully connect using both MQTT and HT…

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## [SSD card crashed, moving backups Q](https://discourse.nodered.org/t/ssd-card-crashed-moving-backups-q/37533)

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**Author:** [@RASelkirk](https://discourse.nodered.org/u/RASelkirk)\
**Replies:** 15\
**Last updated:** [17 December 2020 00:19 UTC](https://discourse.nodered.org/t/ssd-card-crashed-moving-backups-q/37533 "2020-12-17T00:19:50Z")

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Hi All, The bad news is, my card crashed. The so-so news is I made an image file the day before the crash, but it won't boot. So I'm starting from a 10 month old (pre N-R) image and having to add my stuff back. So far,…

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## [Delete Files in a specific folder after 30 days](https://discourse.nodered.org/t/delete-files-in-a-specific-folder-after-30-days/37598)

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**Author:** [@node1](https://discourse.nodered.org/u/node1)\
**Replies:** 3\
**Last updated:** [16 December 2020 23:57 UTC](https://discourse.nodered.org/t/delete-files-in-a-specific-folder-after-30-days/37598 "2020-12-16T23:57:23Z")

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Hello, I just want to create a simple flow, where files in a specify folder on my laptop will be deleted if those are older than 30 days. Could someone give me an example please? Thanks in regards!

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## [Msg.payload undefined - message object](https://discourse.nodered.org/t/msg-payload-undefined-message-object/4985)

<div class="topic-metadata">

**Author:** [@newbee112](https://discourse.nodered.org/u/newbee112)\
**Replies:** 8\
**Last updated:** [16 December 2020 23:37 UTC](https://discourse.nodered.org/t/msg-payload-undefined-message-object/4985 "2020-12-16T23:37:07Z")

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Hi, I have been stuck on this problem for hours. It is probably an easy thing to solve, but the forum nor google resulted in a solution. when i debug the node i get the following: 2018-11-17 22:28:18 node: msg.payloa…

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## [\[solved\] Mosquitto\_pub Node Red](https://discourse.nodered.org/t/solved-mosquitto-pub-node-red/37584)

<div class="topic-metadata">

**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 7\
**Last updated:** [16 December 2020 22:17 UTC](https://discourse.nodered.org/t/solved-mosquitto-pub-node-red/37584 "2020-12-16T22:17:28Z")

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Hello i have a Raspberry Pi with Node Red, nothing else till now. i have a second Raspberry Pi with a 433 Dongel and installed like this to collect and view it on the Monitor works! then installed mosquitto-clients …

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## [SVG node, change one item's color from another node?](https://discourse.nodered.org/t/svg-node-change-one-items-color-from-another-node/35558)

<div class="topic-metadata">

**Author:** [@RASelkirk](https://discourse.nodered.org/u/RASelkirk)\
**Replies:** 15\
**Last updated:** [16 December 2020 20:38 UTC](https://discourse.nodered.org/t/svg-node-change-one-items-color-from-another-node/35558 "2020-12-16T20:38:21Z")

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I've been all over Google looking for this, 98% of it has to do with d.3/HTML. I want to use an SVG node and would like to change the color of ONE element from another node. I've seen data-bind, looks way to complicated …

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## [Basic question on how to find/get Information on homepage](https://discourse.nodered.org/t/basic-question-on-how-to-find-get-information-on-homepage/37419)

<div class="topic-metadata">

**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 9\
**Last updated:** [16 December 2020 19:49 UTC](https://discourse.nodered.org/t/basic-question-on-how-to-find-get-information-on-homepage/37419 "2020-12-16T19:49:51Z")

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Hello i have a basic question about getting the Data from the Net/Homepage with 2 example this page i wish to have the water temperatur and pick up this data! i found out how to dowanload a csv file but can't fin…

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## [Problem with NR in Docker: no connection to the outside](https://discourse.nodered.org/t/problem-with-nr-in-docker-no-connection-to-the-outside/37560)

<div class="topic-metadata">

**Author:** [@jayballz](https://discourse.nodered.org/u/jayballz)\
**Replies:** 0\
**Last updated:** [16 December 2020 01:17 UTC](https://discourse.nodered.org/t/problem-with-nr-in-docker-no-connection-to-the-outside/37560 "2020-12-16T01:17:41Z")

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UPDATE for the people with similiar problems: I found this solution: https://www.problemsolvedtoo.com/2019/02/14/docker-dns-issue/ Just create a daemon.json file in /etc/docker/ sudo nano /etc/docker/daemon.json ente…

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## [How to delete a flow variable from a \`function\` node](https://discourse.nodered.org/t/how-to-delete-a-flow-variable-from-a-function-node/19731)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 16\
**Last updated:** [16 December 2020 17:31 UTC](https://discourse.nodered.org/t/how-to-delete-a-flow-variable-from-a-function-node/19731 "2020-12-16T17:31:05Z")

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I know........ Use the change node. Please indulge me. In one node I have: flow.set('example',"something"); How do I delete the flow variable called example? delete flow.example doesn't work. Stuck.

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