# Latest

**URL:** https://discourse.nodered.org/latest.md?page=590

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

**Page:** 591

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## [Array compare not going well](https://discourse.nodered.org/t/array-compare-not-going-well/61163)

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**Author:** [@Olivia](https://discourse.nodered.org/u/Olivia)\
**Replies:** 10\
**Last updated:** [12 April 2022 12:21 UTC](https://discourse.nodered.org/t/array-compare-not-going-well/61163 "2022-04-12T12:21:47Z")

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Hello everyone, i would like to compare an array, when its 1,1 its should give 1 as output and when its 0,0 it should give a 0. Every other combination should give an error message. i tried this as you can see bellow b…

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## [How can i make animation hmi scada with node red (i couldn't find any video that goes step by step )](https://discourse.nodered.org/t/how-can-i-make-animation-hmi-scada-with-node-red-i-couldnt-find-any-video-that-goes-step-by-step/61172)

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**Author:** [@bilel](https://discourse.nodered.org/u/bilel)\
**Replies:** 1\
**Last updated:** [12 April 2022 12:04 UTC](https://discourse.nodered.org/t/how-can-i-make-animation-hmi-scada-with-node-red-i-couldnt-find-any-video-that-goes-step-by-step/61172 "2022-04-12T12:04:40Z")

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a pdf or a video link for beginer will help

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## [Function problem](https://discourse.nodered.org/t/function-problem/61170)

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**Author:** [@rubenbraekman](https://discourse.nodered.org/u/rubenbraekman)\
**Replies:** 6\
**Last updated:** [12 April 2022 11:54 UTC](https://discourse.nodered.org/t/function-problem/61170 "2022-04-12T11:54:41Z")

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Hello, a noob here, I'm trying to create a function that outputs a true or false depending on the situation. When the number is positive the output has to be false and when the number is negative the output has to be tr…

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## [Watson machine learning node credentials (node-red-contrib-watson-machine-learning node)](https://discourse.nodered.org/t/watson-machine-learning-node-credentials-node-red-contrib-watson-machine-learning-node/61165)

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**Author:** [@Apoorva](https://discourse.nodered.org/u/Apoorva)\
**Replies:** 0\
**Last updated:** [12 April 2022 10:56 UTC](https://discourse.nodered.org/t/watson-machine-learning-node-credentials-node-red-contrib-watson-machine-learning-node/61165 "2022-04-12T10:56:02Z")

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Hello! I am pretty new to using node-red so apologies if this is not the right place to post this. Essentially, I am working with the node-red-contrib-watson-machine-learning node to run predictions. This is the tutori…

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## [Best practice for MC-Protocol Read](https://discourse.nodered.org/t/best-practice-for-mc-protocol-read/61132)

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**Author:** [@rjmiller](https://discourse.nodered.org/u/rjmiller)\
**Replies:** 5\
**Last updated:** [12 April 2022 11:14 UTC](https://discourse.nodered.org/t/best-practice-for-mc-protocol-read/61132 "2022-04-12T11:14:39Z")

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Hi all, I'm successfully connected to a Mitsubishi PLC and I'm able to read addresses using MC-Read. I want to read several addresses that are not contiguous, so I haven't used the ,CNT syntax in the address string. Is…

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## [Serial loopback, how to get message when no data received](https://discourse.nodered.org/t/serial-loopback-how-to-get-message-when-no-data-received/61161)

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**Author:** [@tob84](https://discourse.nodered.org/u/tob84)\
**Replies:** 0\
**Last updated:** [12 April 2022 10:26 UTC](https://discourse.nodered.org/t/serial-loopback-how-to-get-message-when-no-data-received/61161 "2022-04-12T10:26:48Z")

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serialloopback.json (6.9 KB) Hi all I've got a simple serial loopback flow writing a string from COM1-COM2 and COM3-COM4 every 3 seconds, and sending the output from COM3 and COM4 to a TCP out node. This works fine but…

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## [Fa-microchip icon](https://discourse.nodered.org/t/fa-microchip-icon/61152)

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**Author:** [@dzairo](https://discourse.nodered.org/u/dzairo)\
**Replies:** 18\
**Last updated:** [12 April 2022 10:09 UTC](https://discourse.nodered.org/t/fa-microchip-icon/61152 "2022-04-12T10:09:42Z")

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Hi. I try edit existing node and have little problem with icons . for example : fa-microchip is working , and show good , but use class="fa fa-network-wired" then show nothing . Where are stored all icons ? may be nee…

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## [Can i create a generale dashboard that all my other dashboard included in](https://discourse.nodered.org/t/can-i-create-a-generale-dashboard-that-all-my-other-dashboard-included-in/61136)

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**Author:** [@bilel](https://discourse.nodered.org/u/bilel)\
**Replies:** 4\
**Last updated:** [12 April 2022 09:38 UTC](https://discourse.nodered.org/t/can-i-create-a-generale-dashboard-that-all-my-other-dashboard-included-in/61136 "2022-04-12T09:38:34Z")

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this is how i wonna make

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## [Exec Node /n issue in spawn mode](https://discourse.nodered.org/t/exec-node-n-issue-in-spawn-mode/61158)

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**Author:** [@VicBos](https://discourse.nodered.org/u/VicBos)\
**Replies:** 2\
**Last updated:** [12 April 2022 09:23 UTC](https://discourse.nodered.org/t/exec-node-n-issue-in-spawn-mode/61158 "2022-04-12T09:23:27Z")

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Hi. I'm using the Exec node to run python scripts. When the spawn mode is selected (-u python command to disable buffering is included) I randomly get msg.payload that isn't terminated with /n. The missing /n will the…

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## [Modbus tcp node red](https://discourse.nodered.org/t/modbus-tcp-node-red/61146)

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**Author:** [@Ivan27](https://discourse.nodered.org/u/Ivan27)\
**Replies:** 1\
**Last updated:** [12 April 2022 08:35 UTC](https://discourse.nodered.org/t/modbus-tcp-node-red/61146 "2022-04-12T08:35:05Z")

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Buenas tardes tengo un problema con la librería modbus estoy leyendo datos del un plc micro800 Allen bradley todo marcha bien en valores boleanos y enteros pero para leer datos con con punto flotante solo me aparecen val…

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## [ControlTimer sometimes does not pause](https://discourse.nodered.org/t/controltimer-sometimes-does-not-pause/61149)

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**Author:** [@steerage250](https://discourse.nodered.org/u/steerage250)\
**Replies:** 1\
**Last updated:** [12 April 2022 08:13 UTC](https://discourse.nodered.org/t/controltimer-sometimes-does-not-pause/61149 "2022-04-12T08:13:07Z")

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I have a common event that is fed into a Change node where the output is set to PAUSE. The output of that Change node is then sent to about 10 controltimers and they should all pause. (A similar common Change node ou…

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## [Flexible and decent smart radiator TRV (UK)?](https://discourse.nodered.org/t/flexible-and-decent-smart-radiator-trv-uk/60438)

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**Author:** [@hazymat](https://discourse.nodered.org/u/hazymat)\
**Replies:** 8\
**Last updated:** [11 April 2022 21:46 UTC](https://discourse.nodered.org/t/flexible-and-decent-smart-radiator-trv-uk/60438 "2022-04-11T21:46:26Z")

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This isn't really Node-RED related, but I wanted to ask here as I know you are all on the same wavelength! I'm looking for a couple of Smart TRVs (radiator valves), ideally: zigbee or RF but something I can interface…

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## [TypeError: Cannot read properties of undefined (reading 'notification')](https://discourse.nodered.org/t/typeerror-cannot-read-properties-of-undefined-reading-notification/60995)

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**Author:** [@Mannshoch](https://discourse.nodered.org/u/Mannshoch)\
**Replies:** 4\
**Last updated:** [11 April 2022 21:26 UTC](https://discourse.nodered.org/t/typeerror-cannot-read-properties-of-undefined-reading-notification/60995 "2022-04-11T21:26:07Z")

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On a function I have this two Ifs: if (typeof msg.payload.notification !== 'undefined') {...} if (typeof msg.payload.data.data.item.title !== 'undefined') {...} But I get the Error TypeError: Cannot read properties of…

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## [How to bring data from MySQL to Node red in a dashboard](https://discourse.nodered.org/t/how-to-bring-data-from-mysql-to-node-red-in-a-dashboard/61141)

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**Author:** [@22JES](https://discourse.nodered.org/u/22JES)\
**Replies:** 1\
**Last updated:** [11 April 2022 21:23 UTC](https://discourse.nodered.org/t/how-to-bring-data-from-mysql-to-node-red-in-a-dashboard/61141 "2022-04-11T21:23:52Z")

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I already have the database ready and it registers everything but I want it to be shown on my dashboard

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## [Save dashboard switch node state to file](https://discourse.nodered.org/t/save-dashboard-switch-node-state-to-file/60851)

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**Author:** [@gschmidt](https://discourse.nodered.org/u/gschmidt)\
**Replies:** 2\
**Last updated:** [11 April 2022 21:12 UTC](https://discourse.nodered.org/t/save-dashboard-switch-node-state-to-file/60851 "2022-04-11T21:12:51Z")

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Hi, Is it possible to store the state of a dashboard switch node in a context \[file\] and restore the state after a reset/deploy with an injector node?

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## [Integration shelly](https://discourse.nodered.org/t/integration-shelly/61082)

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**Author:** [@jordirt75](https://discourse.nodered.org/u/jordirt75)\
**Replies:** 5\
**Last updated:** [11 April 2022 18:21 UTC](https://discourse.nodered.org/t/integration-shelly/61082 "2022-04-11T18:21:43Z")

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google translation Good morning. I don't know what happens to my assistant man but there is no way I can integrate any device. i tried to integrate a shelly and can't find it, i watched videos on youtube, i followed the …

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## [\[ANNOUNCE\] node-red-contrib-chronos 1.17](https://discourse.nodered.org/t/announce-node-red-contrib-chronos-1-17/61138)

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**Author:** [@jens\_rossbach](https://discourse.nodered.org/u/jens_rossbach)\
**Replies:** 0\
**Last updated:** [11 April 2022 17:44 UTC](https://discourse.nodered.org/t/announce-node-red-contrib-chronos-1-17/61138 "2022-04-11T17:44:46Z")

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Hi all, after a couple of months, I published the new release v1.17.0 of node-red-contrib-chronos. Please have a look at the announcement on GitHub for further details. :loudspeaker: node-red-contrib-chronos 1.17

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## [Template node - Chartjs help](https://discourse.nodered.org/t/template-node-chartjs-help/61134)

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**Author:** [@rakgupta](https://discourse.nodered.org/u/rakgupta)\
**Replies:** 1\
**Last updated:** [11 April 2022 16:50 UTC](https://discourse.nodered.org/t/template-node-chartjs-help/61134 "2022-04-11T16:50:41Z")

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Hello: I am trying to use the "stack" option in a data set but I cannot seem to get it to work. When using the same settings in a codepen.io repository, it does exactly what I am trying to do using the template node. O…

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## [Generic sensor processing code](https://discourse.nodered.org/t/generic-sensor-processing-code/60421)

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**Author:** [@bkenobi](https://discourse.nodered.org/u/bkenobi)\
**Replies:** 51\
**Last updated:** [11 April 2022 16:48 UTC](https://discourse.nodered.org/t/generic-sensor-processing-code/60421 "2022-04-11T16:48:11Z")

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I use rtl\_433 to convert my Acurite sensors into MQTT that NR utilizes. The packets are transmitted one data type at a time so my Acurite 592TXR towers result in several MQTT messages each time they transmit though I re…

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## [Subflow property for selecting ui group](https://discourse.nodered.org/t/subflow-property-for-selecting-ui-group/61128)

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**Author:** [@finlay\_morrison](https://discourse.nodered.org/u/finlay_morrison)\
**Replies:** 1\
**Last updated:** [11 April 2022 15:49 UTC](https://discourse.nodered.org/t/subflow-property-for-selecting-ui-group/61128 "2022-04-11T15:49:56Z")

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I am trying to create a subflow which houses functionality for dealing with a single type of data that my sensors relay back. I would like to be able to select the ui group that a specific instance of a subflow should us…

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## [Can't open node-red](https://discourse.nodered.org/t/cant-open-node-red/60014)

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**Author:** [@shidqinaf](https://discourse.nodered.org/u/shidqinaf)\
**Replies:** 3\
**Last updated:** [11 April 2022 15:29 UTC](https://discourse.nodered.org/t/cant-open-node-red/60014 "2022-04-11T15:29:25Z")

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Hello, I want to open node red locally, but every time I start it closes itself. Anyone can help me to fix this?

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## [Comparing two payload at new message but keeping last value if not refreshed](https://discourse.nodered.org/t/comparing-two-payload-at-new-message-but-keeping-last-value-if-not-refreshed/61123)

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**Author:** [@ch-zacmo](https://discourse.nodered.org/u/ch-zacmo)\
**Replies:** 3\
**Last updated:** [11 April 2022 15:19 UTC](https://discourse.nodered.org/t/comparing-two-payload-at-new-message-but-keeping-last-value-if-not-refreshed/61123 "2022-04-11T15:19:34Z")

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Hi, First post here. For the context, I'm receiving a temperature from a KNX node and I would like to compare it with a set value to trigger a Reset Set gate. What I would like my flow to do is : If temperature is bi…

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## [Calculate timeinterval between two signals](https://discourse.nodered.org/t/calculate-timeinterval-between-two-signals/61108)

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**Author:** [@Node01](https://discourse.nodered.org/u/Node01)\
**Replies:** 12\
**Last updated:** [11 April 2022 14:54 UTC](https://discourse.nodered.org/t/calculate-timeinterval-between-two-signals/61108 "2022-04-11T14:54:58Z")

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Hello everyone I have following problem, I want to calculate an interval between two different signals. For example I want save timestamp from a first signal and compare it with timestamp from second signal. But i don…

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## [Access remote NR instance behind firewall with proxy server?](https://discourse.nodered.org/t/access-remote-nr-instance-behind-firewall-with-proxy-server/61124)

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**Author:** [@bbartling](https://discourse.nodered.org/u/bbartling)\
**Replies:** 1\
**Last updated:** [11 April 2022 15:09 UTC](https://discourse.nodered.org/t/access-remote-nr-instance-behind-firewall-with-proxy-server/61124 "2022-04-11T15:09:22Z")

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Hopefully this isn't a silly question, but for work I use an electrical meter called an egauge to log data for research projects and it has an easy configuration interface via a web browser. What I think is really slick…

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## [Trigger an alarm at a certain time off day a couple of times at a certain time interval](https://discourse.nodered.org/t/trigger-an-alarm-at-a-certain-time-off-day-a-couple-of-times-at-a-certain-time-interval/59966)

<div class="topic-metadata">

**Author:** [@SplitSecComp](https://discourse.nodered.org/u/SplitSecComp)\
**Replies:** 5\
**Last updated:** [11 April 2022 13:33 UTC](https://discourse.nodered.org/t/trigger-an-alarm-at-a-certain-time-off-day-a-couple-of-times-at-a-certain-time-interval/59966 "2022-04-11T13:33:35Z")

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Hi. I need a timer to trigger an alarm at a certain time off day a couple of times at a certain time interval. i need to be able to change the time and interval with function node or a message. I have tried ezitmer but…

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## [How can I move the position of a dashboard gauge?](https://discourse.nodered.org/t/how-can-i-move-the-position-of-a-dashboard-gauge/61115)

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**Author:** [@bilel](https://discourse.nodered.org/u/bilel)\
**Replies:** 5\
**Last updated:** [11 April 2022 12:33 UTC](https://discourse.nodered.org/t/how-can-i-move-the-position-of-a-dashboard-gauge/61115 "2022-04-11T12:33:44Z")

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how can i move node-red dashboard guages

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## [Uibuilder: Getting Started Walkthrough](https://discourse.nodered.org/t/uibuilder-getting-started-walkthrough/51483)

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**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 24\
**Last updated:** [11 April 2022 12:31 UTC](https://discourse.nodered.org/t/uibuilder-getting-started-walkthrough/51483 "2022-04-11T12:31:20Z")

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OK, so a few people have asked for this and here is the first part! This walkthrough for getting started with uibuilder is a section of what will be a slightly longer page that will go into the uibuilder docs. It may ev…

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## [\[Tutorial\] How to create a custom Node-Red Docker Image and conduct Integration Testing using Docker-Compose](https://discourse.nodered.org/t/tutorial-how-to-create-a-custom-node-red-docker-image-and-conduct-integration-testing-using-docker-compose/61059)

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**Author:** [@Shan](https://discourse.nodered.org/u/Shan)\
**Replies:** 0\
**Last updated:** [10 April 2022 11:55 UTC](https://discourse.nodered.org/t/tutorial-how-to-create-a-custom-node-red-docker-image-and-conduct-integration-testing-using-docker-compose/61059 "2022-04-10T11:55:17Z")

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So I have been experimenting with Node-Red and have got some good grip on docker and docker-compose. So what better way than to work something up I documented: How to build a custom Node-Red image using Docker Multi-S…

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## [Processing sensor data and structuring node-red-program](https://discourse.nodered.org/t/processing-sensor-data-and-structuring-node-red-program/56152)

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**Author:** [@juntiedt](https://discourse.nodered.org/u/juntiedt)\
**Replies:** 2\
**Last updated:** [11 April 2022 09:13 UTC](https://discourse.nodered.org/t/processing-sensor-data-and-structuring-node-red-program/56152 "2022-04-11T09:13:12Z")

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for my floor heating system I had to manage quite a few sensors. I put all sensors in one flow and all my different rooms in seperate flows. I used a flow router (input) to bring the sensor data to the rooms. I actually…

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## [Dates not handled correctly](https://discourse.nodered.org/t/dates-not-handled-correctly/61091)

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**Author:** [@killahbee](https://discourse.nodered.org/u/killahbee)\
**Replies:** 2\
**Last updated:** [11 April 2022 09:37 UTC](https://discourse.nodered.org/t/dates-not-handled-correctly/61091 "2022-04-11T09:37:51Z")

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Trying to get something done based on the date. In this example the collection date is the 13th and today is the 10th, but for some reason it's is marking the if statement as true. var now = new Date().getDate() var co…

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