# Latest

**URL:** https://discourse.nodered.org/latest.md?page=931

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

**Page:** 932

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

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**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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## [Deploy button not working after import](https://discourse.nodered.org/t/deploy-button-not-working-after-import/37618)

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**Author:** [@josekavunkal](https://discourse.nodered.org/u/josekavunkal)\
**Replies:** 4\
**Last updated:** [17 December 2020 11:33 UTC](https://discourse.nodered.org/t/deploy-button-not-working-after-import/37618 "2020-12-17T11:33:16Z")

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I imported following code . \[{"id":"c4ed7b7f.b766a8","type":"ui\_chart","z":"c1f54225.8011f","d":true,"name":"","group":"bb260e6b.77d62","order":8,"width":"9","height":"10","label":"Arduino YL-69 + v1.2 data","chartType"…

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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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## [Serial (UART) disconnections](https://discourse.nodered.org/t/serial-uart-disconnections/37632)

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**Author:** [@orang](https://discourse.nodered.org/u/orang)\
**Replies:** 2\
**Last updated:** [17 December 2020 09:53 UTC](https://discourse.nodered.org/t/serial-uart-disconnections/37632 "2020-12-17T09:53:05Z")

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Hi, i'm using Node-red on RPI 4 B to obtain serial (UART) data from device, everything seems to be ok but iv'e noticed that the connection hangs from time to time without noticeable pattern but with the following error i…

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## [Trigger node does NOT support JSONata on ouptput messages](https://discourse.nodered.org/t/trigger-node-does-not-support-jsonata-on-ouptput-messages/37436)

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**Author:** [@zinahe](https://discourse.nodered.org/u/zinahe)\
**Replies:** 12\
**Last updated:** [17 December 2020 09:24 UTC](https://discourse.nodered.org/t/trigger-node-does-not-support-jsonata-on-ouptput-messages/37436 "2020-12-17T09:24:04Z")

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Hi All, A very happy user of Node-RED here. Thank you all for the hard work. I have noticed that the Trigger node is missing JSONata (J: Expression) option to compose output messages. I ran in to an issue where the out…

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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)

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**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)

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**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)

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**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)

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**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)

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**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)

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**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)

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**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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## [File lister: problem "File could not be accessed"](https://discourse.nodered.org/t/file-lister-problem-file-could-not-be-accessed/37579)

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**Author:** [@rg24git](https://discourse.nodered.org/u/rg24git)\
**Replies:** 2\
**Last updated:** [16 December 2020 16:48 UTC](https://discourse.nodered.org/t/file-lister-problem-file-could-not-be-accessed/37579 "2020-12-16T16:48:02Z")

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I have Synology with hassio and node-red I work in administrator account I search to use File Lister. into node-red No succes :frowning: I have message "File could not be accessed" \[{"id":"a99e9181.01db6","type"…

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## [Jsonata & Multiple context stores](https://discourse.nodered.org/t/jsonata-multiple-context-stores/37582)

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**Author:** [@lowlow](https://discourse.nodered.org/u/lowlow)\
**Replies:** 2\
**Last updated:** [16 December 2020 14:52 UTC](https://discourse.nodered.org/t/jsonata-multiple-context-stores/37582 "2020-12-16T14:52:44Z")

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Hello, As NR allows to define multiple context stores, is there a way to select directly one of these stores with the "$globalContext()" function in a JSONata expression ? Or should I use a change node to retrieve the…

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## [Best way to concatenate content over time?](https://discourse.nodered.org/t/best-way-to-concatenate-content-over-time/37574)

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**Author:** [@bltDefender](https://discourse.nodered.org/u/bltDefender)\
**Replies:** 3\
**Last updated:** [16 December 2020 13:45 UTC](https://discourse.nodered.org/t/best-way-to-concatenate-content-over-time/37574 "2020-12-16T13:45:32Z")

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I do have a process consisting of several functions and api calls which is looped until all api responses have been processed. every time a loop cycle ends, there is some content being generated (f.e. "result of loop 1",…

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## [Info regarding check multiples switch's status](https://discourse.nodered.org/t/info-regarding-check-multiples-switchs-status/36940)

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**Author:** [@elmarsiglia](https://discourse.nodered.org/u/elmarsiglia)\
**Replies:** 5\
**Last updated:** [16 December 2020 13:39 UTC](https://discourse.nodered.org/t/info-regarding-check-multiples-switchs-status/36940 "2020-12-16T13:39:27Z")

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Hi guys, i am trying to build a node (if all of them off do something) and i could find a way to check in only one "events-state" multiple switches. i tried from homeassisant to aggregate in a group but from nodered i co…

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## [How to send Acknowledgement to device](https://discourse.nodered.org/t/how-to-send-acknowledgement-to-device/37520)

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**Author:** [@Ptwtech](https://discourse.nodered.org/u/Ptwtech)\
**Replies:** 8\
**Last updated:** [16 December 2020 13:37 UTC](https://discourse.nodered.org/t/how-to-send-acknowledgement-to-device/37520 "2020-12-16T13:37:29Z")

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Hello , I want to send acknowledgement to device in hex format. I'm doing this.please help me how to send acknowledgement in hex format Thanks var data; if(msg.payload.length == 17){ data= stringToHex('01'); }else…

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## [Are forum emails working?](https://discourse.nodered.org/t/are-forum-emails-working/37573)

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**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\
**Replies:** 2\
**Last updated:** [16 December 2020 11:50 UTC](https://discourse.nodered.org/t/are-forum-emails-working/37573 "2020-12-16T11:50:33Z")

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I have email mode enabled for the forum, which normally sends me an email for every post, but I have not received any since last night. Is this a problem with the forum? I know that Google (gmail) was having problems t…

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## [Simple Server for ESP8266 firmware only works once, then needs 'redeploying'](https://discourse.nodered.org/t/simple-server-for-esp8266-firmware-only-works-once-then-needs-redeploying/37572)

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**Author:** [@PedanticPete](https://discourse.nodered.org/u/PedanticPete)\
**Replies:** 0\
**Last updated:** [16 December 2020 11:06 UTC](https://discourse.nodered.org/t/simple-server-for-esp8266-firmware-only-works-once-then-needs-redeploying/37572 "2020-12-16T11:06:31Z")

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Hi, I am using a very simple Node-Red server to server a .bin file to an ESP8266 that requests it using the ESPhttpUpdate library. "http in" node + "file edit in" node + "http out" node \[{"id":"7538e99c.ff6858","type"…

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## [Read properties from global/flow in ui nodes](https://discourse.nodered.org/t/read-properties-from-global-flow-in-ui-nodes/37571)

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**Author:** [@lowlow](https://discourse.nodered.org/u/lowlow)\
**Replies:** 2\
**Last updated:** [16 December 2020 11:02 UTC](https://discourse.nodered.org/t/read-properties-from-global-flow-in-ui-nodes/37571 "2020-12-16T11:02:58Z")

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Hello, I'm looking into a way to manage translation for "labels" of the dashboard button nodes I have in my flows. My plan is store the translations in the global context and then retrieving these data and pushing them…

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## [How to apply style(css) to dashboard item when a message arrives](https://discourse.nodered.org/t/how-to-apply-style-css-to-dashboard-item-when-a-message-arrives/37566)

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**Author:** [@Mirco\_H](https://discourse.nodered.org/u/Mirco_H)\
**Replies:** 2\
**Last updated:** [16 December 2020 11:00 UTC](https://discourse.nodered.org/t/how-to-apply-style-css-to-dashboard-item-when-a-message-arrives/37566 "2020-12-16T11:00:41Z")

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Hey i have the same Problem like @kiran, I would like to create a Dashboard with ui\_text Node. This Dashboard is Displayed for End Customer, when they say for Example "Hello", The Voice2Json should trigger a Message a…

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## [How to add Css file path to html file of custom node](https://discourse.nodered.org/t/how-to-add-css-file-path-to-html-file-of-custom-node/20096)

<div class="topic-metadata">

**Author:** [@kiran](https://discourse.nodered.org/u/kiran)\
**Replies:** 4\
**Last updated:** [16 December 2020 10:00 UTC](https://discourse.nodered.org/t/how-to-add-css-file-path-to-html-file-of-custom-node/20096 "2020-12-16T10:00:29Z")

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I created custom node, i want to add CSS style like @-webkit-keyframes fadeIn { from {opacity: 0;} to {opacity: 1;} } to element in html. how to do that

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## [Telegram bot chat - add a friend](https://discourse.nodered.org/t/telegram-bot-chat-add-a-friend/37146)

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**Author:** [@loeten](https://discourse.nodered.org/u/loeten)\
**Replies:** 9\
**Last updated:** [16 December 2020 09:54 UTC](https://discourse.nodered.org/t/telegram-bot-chat-add-a-friend/37146 "2020-12-16T09:54:53Z")

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Hi there, I sucessfully used node-red-contrib-telegrambot with a bot created via BotFather, to send and receive messages. So usually I send texts that are interpreted as commands and I generate answers using the initial …

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