# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=644

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

**Page:** 645

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## [Need help with the error part please! Cannot display error](https://discourse.nodered.org/t/need-help-with-the-error-part-please-cannot-display-error/36830)

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**Author:** [@SKA](https://discourse.nodered.org/u/SKA)\
**Replies:** 5\
**Last updated:** [1 December 2020 23:45 UTC](https://discourse.nodered.org/t/need-help-with-the-error-part-please-cannot-display-error/36830 "2020-12-01T23:45:34Z")

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I am trying to display an error if the value is less than or equal to zero, but it for some reasons isn't working. I have tried searching, but no luck. I know it is probably something very small that needs to be fixed th…

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## [Update one object in Global Context array](https://discourse.nodered.org/t/update-one-object-in-global-context-array/36790)

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**Author:** [@cllp](https://discourse.nodered.org/u/cllp)\
**Replies:** 9\
**Last updated:** [1 December 2020 21:00 UTC](https://discourse.nodered.org/t/update-one-object-in-global-context-array/36790 "2020-12-01T21:00:23Z")

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Hi, I´m worikng with the global context to stora an array of devices. For a device´s incoming message I use the global.get and filter on the whole devicelist array to find the specific object (device). I´m updating some …

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## [Optimisation tactics - JSONata and State Machines](https://discourse.nodered.org/t/optimisation-tactics-jsonata-and-state-machines/9608)

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**Author:** [@bohtho](https://discourse.nodered.org/u/bohtho)\
**Replies:** 25\
**Last updated:** [1 December 2020 20:48 UTC](https://discourse.nodered.org/t/optimisation-tactics-jsonata-and-state-machines/9608 "2020-12-01T20:48:44Z")

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Having been hooked on NR for about a year, and steadily evolving a massive spaghetti of many flows with somewhat diverse bouquet of common solutions, and getting to a point where it feels like some unnecessary weight, I …

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## [Node-Red to Slack attachments](https://discourse.nodered.org/t/node-red-to-slack-attachments/36829)

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**Author:** [@loki79](https://discourse.nodered.org/u/loki79)\
**Replies:** 0\
**Last updated:** [1 December 2020 20:05 UTC](https://discourse.nodered.org/t/node-red-to-slack-attachments/36829 "2020-12-01T20:05:32Z")

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Hi Guys, I'm new here and working with node-red for half a year or so. I like it very much and still learning alot. But I have a problem. I'm sending my notifications and images via Pushbullet and that worked like it sh…

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## [Stop timer display remaining time?](https://discourse.nodered.org/t/stop-timer-display-remaining-time/36808)

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**Author:** [@dougle03](https://discourse.nodered.org/u/dougle03)\
**Replies:** 4\
**Last updated:** [1 December 2020 19:51 UTC](https://discourse.nodered.org/t/stop-timer-display-remaining-time/36808 "2020-12-01T19:51:02Z")

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Hi all, Can anyone recommend a alternative for the Stop timer node that will show the remaining time under the node (Not bothered about dashboard). Thanks, P

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## [Node-RED expects JSON?](https://discourse.nodered.org/t/node-red-expects-json/36824)

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**Author:** [@DripHarrison](https://discourse.nodered.org/u/DripHarrison)\
**Replies:** 1\
**Last updated:** [1 December 2020 19:50 UTC](https://discourse.nodered.org/t/node-red-expects-json/36824 "2020-12-01T19:50:45Z")

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I am working on a project that uses an Arduino connected to LabVIEW, and Node-RED. It is a smart home system, with multiple user-defined inputs and outputs. The Node-RED dashboard is able to receive all of the inputs tha…

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## [Eurotronic Zigbee Spirit Thermostat in HomeKit](https://discourse.nodered.org/t/eurotronic-zigbee-spirit-thermostat-in-homekit/36783)

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**Author:** [@broken.pipe](https://discourse.nodered.org/u/broken.pipe)\
**Replies:** 3\
**Last updated:** [1 December 2020 17:21 UTC](https://discourse.nodered.org/t/eurotronic-zigbee-spirit-thermostat-in-homekit/36783 "2020-12-01T17:21:22Z")

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Hello everyone, I am trying to model my thermostat in Homekit (the connection is working and I can control my thermostat (over deConz Addon and REST API)). I've already had a look at the "Clever Thermostat" demo, but I…

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## ['Const' is available.... Mozilla JS extensions (use moz) Error](https://discourse.nodered.org/t/const-is-available-mozilla-js-extensions-use-moz-error/36805)

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**Author:** [@stephenn](https://discourse.nodered.org/u/stephenn)\
**Replies:** 4\
**Last updated:** [1 December 2020 16:08 UTC](https://discourse.nodered.org/t/const-is-available-mozilla-js-extensions-use-moz-error/36805 "2020-12-01T16:08:14Z")

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I am using someone else's flow to download backups from my Hubitat Hub that then uploads to Dropbox. I just noticed it hasn't been working for 2 weeks and I have this error that is causing problem I believe. I tried …

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## [Node-red-contrib-drawsvg](https://discourse.nodered.org/t/node-red-contrib-drawsvg/36804)

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**Author:** [@jayaprabhu](https://discourse.nodered.org/u/jayaprabhu)\
**Replies:** 1\
**Last updated:** [1 December 2020 14:19 UTC](https://discourse.nodered.org/t/node-red-contrib-drawsvg/36804 "2020-12-01T14:19:23Z")

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Hello, We are looking for some open source SVG editors for our commercial deployment. We are in the process of exploring. Looks like the node red is Apache-2.0 License. But the library used by node-red for SVG editor is…

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## [SQL date to chart](https://discourse.nodered.org/t/sql-date-to-chart/36787)

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**Author:** [@MA.ING](https://discourse.nodered.org/u/MA.ING)\
**Replies:** 4\
**Last updated:** [1 December 2020 10:51 UTC](https://discourse.nodered.org/t/sql-date-to-chart/36787 "2020-12-01T10:51:36Z")

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Hi, im trying to get a chart with 7 lines comming from 7 variables from SQL, if i get only 1 variable all is fine in the chart, but if i want 2 or more variables/lines in my chart its imposible to get, someone knows how …

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## [Force node-red server to reload deployed files without restaring from command line](https://discourse.nodered.org/t/force-node-red-server-to-reload-deployed-files-without-restaring-from-command-line/36770)

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**Author:** [@hamboy75](https://discourse.nodered.org/u/hamboy75)\
**Replies:** 7\
**Last updated:** [1 December 2020 09:22 UTC](https://discourse.nodered.org/t/force-node-red-server-to-reload-deployed-files-without-restaring-from-command-line/36770 "2020-12-01T09:22:26Z")

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Hi I'm not using node-red web editor to create my files but i want to use node-red server to run them. (webserver is fully disabled) Is it possible to relad the deployed files in .node-red directory (flow json file) wi…

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## [Caution installing nodes that may replace your flows file](https://discourse.nodered.org/t/caution-installing-nodes-that-may-replace-your-flows-file/36775)

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**Author:** [@nileio](https://discourse.nodered.org/u/nileio)\
**Replies:** 8\
**Last updated:** [1 December 2020 00:08 UTC](https://discourse.nodered.org/t/caution-installing-nodes-that-may-replace-your-flows-file/36775 "2020-12-01T00:08:06Z")

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I learned it the hard way guys, so I am letting everyone know. I was experimenting with a flow idea and while browsing for additional nodes I came across https://github.com/Streampunk/node-red-contrib-dynamorse-core loo…

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## [HTTP response based on last status of variable](https://discourse.nodered.org/t/http-response-based-on-last-status-of-variable/36771)

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**Author:** [@oliver.es](https://discourse.nodered.org/u/oliver.es)\
**Replies:** 2\
**Last updated:** [30 November 2020 22:20 UTC](https://discourse.nodered.org/t/http-response-based-on-last-status-of-variable/36771 "2020-11-30T22:20:05Z")

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Hi, I'm trying to build little tricky flow for purpose as follows: I have the Hikvision IP camera installed on door and this camera is sending alarm to Node-RED using hikvision-alarm-in when detect motion. In debug wind…

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## [Is it possible to link the NEST thermostat to nodered using NORA?](https://discourse.nodered.org/t/is-it-possible-to-link-the-nest-thermostat-to-nodered-using-nora/35495)

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**Author:** [@piggy](https://discourse.nodered.org/u/piggy)\
**Replies:** 21\
**Last updated:** [30 November 2020 21:26 UTC](https://discourse.nodered.org/t/is-it-possible-to-link-the-nest-thermostat-to-nodered-using-nora/35495 "2020-11-30T21:26:14Z")

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is it possiable link the NEST thermostat to nodered using NORA? THX!

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## [Form node use in node red](https://discourse.nodered.org/t/form-node-use-in-node-red/36710)

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**Author:** [@bachloo.rahul](https://discourse.nodered.org/u/bachloo.rahul)\
**Replies:** 5\
**Last updated:** [29 November 2020 14:06 UTC](https://discourse.nodered.org/t/form-node-use-in-node-red/36710 "2020-11-29T14:06:01Z")

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\[{"id":"2de7c650.bbb06a","type":"tab","label":"Flow 2","disabled":false,"info":""},{"id":"3979472e.7741f8","type":"buffer-parser","z":"2de7c650.bbb06a","name":"Bulid Tags","data":"payload.data","dataType":"msg","speci…

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## [Node red will not start](https://discourse.nodered.org/t/node-red-will-not-start/36758)

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**Author:** [@hebbus](https://discourse.nodered.org/u/hebbus)\
**Replies:** 6\
**Last updated:** [30 November 2020 17:06 UTC](https://discourse.nodered.org/t/node-red-will-not-start/36758 "2020-11-30T17:06:46Z")

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Try to install nodered again and I get the following message: pi@raspberrypi:~ $ sudo apt-get install nodered Pakketlijsten worden ingelezen... Klaar Boom van vereisten wordt opgebouwd De statusinformatie wordt gelez…

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## [Node-red-contrib-opcua Write Extension Objects Datatype](https://discourse.nodered.org/t/node-red-contrib-opcua-write-extension-objects-datatype/36763)

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**Author:** [@aitor](https://discourse.nodered.org/u/aitor)\
**Replies:** 0\
**Last updated:** [30 November 2020 15:52 UTC](https://discourse.nodered.org/t/node-red-contrib-opcua-write-extension-objects-datatype/36763 "2020-11-30T15:52:30Z")

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Hi there, I am trying to send ExtensionObject datatypes using the lastest version of node-red-contrib-opcua. Does anybody know if this node supports writing this datatype? (I've tried with other datatypes such as bool…

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## [Twitter - Old Tweets](https://discourse.nodered.org/t/twitter-old-tweets/36759)

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**Author:** [@knubbl](https://discourse.nodered.org/u/knubbl)\
**Replies:** 1\
**Last updated:** [30 November 2020 14:15 UTC](https://discourse.nodered.org/t/twitter-old-tweets/36759 "2020-11-30T14:15:08Z")

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Hi, im Using node-red-twitter to request Tweets from a certain user. So far it works but i want to get tweets with a defined Hashtag also for the past. At the moment i only get new tweets posted by the user. Is it po…

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## [Multiple injections at the same time?](https://discourse.nodered.org/t/multiple-injections-at-the-same-time/36319)

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**Author:** [@agmacedo](https://discourse.nodered.org/u/agmacedo)\
**Replies:** 11\
**Last updated:** [30 November 2020 13:56 UTC](https://discourse.nodered.org/t/multiple-injections-at-the-same-time/36319 "2020-11-30T13:56:32Z")

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Hello, My idea is to develope a datalogger in node-red. If I have use a injection node (1 minute of interval) to write to a database diferent tags (values, some kind of identification, ...) from diferent sources (variab…

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## [Modify "function node" to create "Loop"](https://discourse.nodered.org/t/modify-function-node-to-create-loop/36750)

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**Author:** [@seyeon](https://discourse.nodered.org/u/seyeon)\
**Replies:** 1\
**Last updated:** [30 November 2020 11:25 UTC](https://discourse.nodered.org/t/modify-function-node-to-create-loop/36750 "2020-11-30T11:25:25Z")

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\[{"id":"7401e57d.659e4c","type":"function","z":"f5d4feda.70164","name":"dimming","func":"x = msg.payload\\nfor(var x=50; x\<=255; x++)\\n{\\n node.send({\\"bright\\":x})\\n}","outputs":1,"noerr":0,"initialize":"","finaliz…

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## [Cannot login admin after using dashboard on ios](https://discourse.nodered.org/t/cannot-login-admin-after-using-dashboard-on-ios/36713)

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**Author:** [@linhtranvu](https://discourse.nodered.org/u/linhtranvu)\
**Replies:** 1\
**Last updated:** [30 November 2020 09:53 UTC](https://discourse.nodered.org/t/cannot-login-admin-after-using-dashboard-on-ios/36713 "2020-11-30T09:53:16Z")

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I find this issue while working with my app. At first I think there s something wrong with my app, then discover it is an weird issue on IOS. How to replicate: 1.Open dashboard with authentication on safari 2. Close da…

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## [How to send Slash Commands to Slack](https://discourse.nodered.org/t/how-to-send-slash-commands-to-slack/36734)

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**Author:** [@Deleon](https://discourse.nodered.org/u/Deleon)\
**Replies:** 1\
**Last updated:** [30 November 2020 08:46 UTC](https://discourse.nodered.org/t/how-to-send-slash-commands-to-slack/36734 "2020-11-30T08:46:10Z")

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Hi people anybody know how i can send slash commands from node-red to slack? i need to invoke a "/pool" for example in Slack i have a integration between WA \<\> Node-red \<\> Slack and i need analyze the responses from W…

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## [Tcp in node loosing/stacking messages](https://discourse.nodered.org/t/tcp-in-node-loosing-stacking-messages/15049)

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**Author:** [@SeRiusRod](https://discourse.nodered.org/u/SeRiusRod)\
**Replies:** 12\
**Last updated:** [30 November 2020 06:40 UTC](https://discourse.nodered.org/t/tcp-in-node-loosing-stacking-messages/15049 "2020-11-30T06:40:34Z")

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I was doing some modifications to my system when I found that I was losing mqtt messages. I debugged the issue to the first node, a tcp input. I use mysensors on my devices, and it has a network gateway that publishes t…

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## [Change node-red-contrib-ezviz node language to English](https://discourse.nodered.org/t/change-node-red-contrib-ezviz-node-language-to-english/36707)

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**Author:** [@KoenH](https://discourse.nodered.org/u/KoenH)\
**Replies:** 6\
**Last updated:** [30 November 2020 06:02 UTC](https://discourse.nodered.org/t/change-node-red-contrib-ezviz-node-language-to-english/36707 "2020-11-30T06:02:59Z")

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Hello, i want to test if a node is doing what i search, but it's programmed in (i think) Chinese... ( node-red-contrib-ezviz) How can i change it to English so i understand what is it doing? already thanks!

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## [Inject at specific time at granular level](https://discourse.nodered.org/t/inject-at-specific-time-at-granular-level/36738)

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**Author:** [@varunyc](https://discourse.nodered.org/u/varunyc)\
**Replies:** 1\
**Last updated:** [30 November 2020 03:53 UTC](https://discourse.nodered.org/t/inject-at-specific-time-at-granular-level/36738 "2020-11-30T03:53:16Z")

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Hi there, simple question : How can I trigger a flow every fifteen minutes interval from 23:00PM to 3:00AM. As inject node support only one day configuration that is from 23:00PM to 00:00. I can use another inject no…

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## [No catch of TCP timeout](https://discourse.nodered.org/t/no-catch-of-tcp-timeout/36735)

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**Author:** [@garybia](https://discourse.nodered.org/u/garybia)\
**Replies:** 4\
**Last updated:** [30 November 2020 00:53 UTC](https://discourse.nodered.org/t/no-catch-of-tcp-timeout/36735 "2020-11-30T00:53:47Z")

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I am testing a disconnection of a tcp in node. I have an external computer connected to my node-red running on a pi. I set the the keep alive parameter on the pi set as net.ipv4.tcp\_keepalive\_time = 60 net.ipv4.tcp\_ke…

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## [Multiple Instances of a Flow](https://discourse.nodered.org/t/multiple-instances-of-a-flow/36732)

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**Author:** [@davidmarch](https://discourse.nodered.org/u/davidmarch)\
**Replies:** 1\
**Last updated:** [29 November 2020 22:07 UTC](https://discourse.nodered.org/t/multiple-instances-of-a-flow/36732 "2020-11-29T22:07:37Z")

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I have a flow that I want to be able to create multiple instances of and have them run independently. I am controlling a number of IoT devices but each device sees different circumstances so each needs to be controlled b…

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## [Getting a value from json for a gauge](https://discourse.nodered.org/t/getting-a-value-from-json-for-a-gauge/36728)

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**Author:** [@Wingnut](https://discourse.nodered.org/u/Wingnut)\
**Replies:** 4\
**Last updated:** [29 November 2020 21:45 UTC](https://discourse.nodered.org/t/getting-a-value-from-json-for-a-gauge/36728 "2020-11-29T21:45:56Z")

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I'm new to this, so much to learn with Home Assistant, Tasmota, Grafana and now Node Red. I'm trying to construct a Node Red Dashboard to display and control my Owl Intuition Electricity monitor and Central Heating syst…

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## [Split the string and set to number](https://discourse.nodered.org/t/split-the-string-and-set-to-number/36727)

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**Author:** [@Napster](https://discourse.nodered.org/u/Napster)\
**Replies:** 3\
**Last updated:** [29 November 2020 20:08 UTC](https://discourse.nodered.org/t/split-the-string-and-set-to-number/36727 "2020-11-29T20:08:39Z")

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Hello, 0-1:24.2.3(201129181002W)(00050.845\*m3) I got this payload from my smart meter, i need only the m3 value. How can i do that ? Kind Regards

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## [Update in IOTstack](https://discourse.nodered.org/t/update-in-iotstack/36723)

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**Author:** [@BBurkett](https://discourse.nodered.org/u/BBurkett)\
**Replies:** 1\
**Last updated:** [29 November 2020 17:34 UTC](https://discourse.nodered.org/t/update-in-iotstack/36723 "2020-11-29T17:34:57Z")

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I’m running NodeRed in IOTstack/Docker and can’t seem to find how to update to latest NodeRed version. Can anyone point me in the right direction? Thanks! ~Bob

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