# Latest

**URL:** https://discourse.nodered.org/latest.md?page=775

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

**Page:** 776

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## [How can I detect changes in varaibles?](https://discourse.nodered.org/t/how-can-i-detect-changes-in-varaibles/48316)

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**Author:** [@juan\_R](https://discourse.nodered.org/u/juan_R)\
**Replies:** 1\
**Last updated:** [12 July 2021 13:31 UTC](https://discourse.nodered.org/t/how-can-i-detect-changes-in-varaibles/48316 "2021-07-12T13:31:53Z")

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Hello everyone, I am developing a code and I want to active a "controler" for see the value of one variable in a period of time. Right now I do this: The inyect repeat every second and in the function I check the va…

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## [Move a file from point A to point B](https://discourse.nodered.org/t/move-a-file-from-point-a-to-point-b/48301)

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**Author:** [@luis](https://discourse.nodered.org/u/luis)\
**Replies:** 18\
**Last updated:** [12 July 2021 13:21 UTC](https://discourse.nodered.org/t/move-a-file-from-point-a-to-point-b/48301 "2021-07-12T13:21:49Z")

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I have a file in a folder and i want to move it to another folder, any ideias?

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## [Aquarium Controller - Raspberry PI 4B Node-RED, Atlas-Scientific i2c Devices, NCD i2c Relay Board](https://discourse.nodered.org/t/aquarium-controller-raspberry-pi-4b-node-red-atlas-scientific-i2c-devices-ncd-i2c-relay-board/25839)

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**Author:** [@SonoraTechnical](https://discourse.nodered.org/u/SonoraTechnical)\
**Replies:** 44\
**Last updated:** [12 July 2021 12:55 UTC](https://discourse.nodered.org/t/aquarium-controller-raspberry-pi-4b-node-red-atlas-scientific-i2c-devices-ncd-i2c-relay-board/25839 "2021-07-12T12:55:31Z")

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Aquarium Controller, Pardon the Topic Title, but I wanted this Project to be found. This project has had many false starts as a baremetal project on ArduinoDue and later a UWP on RPI3B w/ Win10IoT. I was particularly i…

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## [Connection Speed Comparisons](https://discourse.nodered.org/t/connection-speed-comparisons/48282)

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**Author:** [@tmichaeltx](https://discourse.nodered.org/u/tmichaeltx)\
**Replies:** 4\
**Last updated:** [12 July 2021 12:46 UTC](https://discourse.nodered.org/t/connection-speed-comparisons/48282 "2021-07-12T12:46:44Z")

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I have started using @Steve-Mcl 's excellent flow-timer in my development to compare various ways of doing things and found some interesting anecdata to share. When comparing 3 ways of connecting 2 nodes, I found the fo…

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## [Seeing the code for custom nodes](https://discourse.nodered.org/t/seeing-the-code-for-custom-nodes/48291)

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**Author:** [@ryan1998](https://discourse.nodered.org/u/ryan1998)\
**Replies:** 2\
**Last updated:** [12 July 2021 12:43 UTC](https://discourse.nodered.org/t/seeing-the-code-for-custom-nodes/48291 "2021-07-12T12:43:41Z")

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Hi all. I am new to Node-Red. I just installed a custom node. (node-red-contrib-rate (node) - Node-RED) For learning purposes, it would be great to see the javscript that drives the node functionality. Is there any …

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## [Ui-table supports ui\_control](https://discourse.nodered.org/t/ui-table-supports-ui-control/18870)

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**Author:** [@Christian-Me](https://discourse.nodered.org/u/Christian-Me)\
**Replies:** 84\
**Last updated:** [12 July 2021 12:32 UTC](https://discourse.nodered.org/t/ui-table-supports-ui-control/18870 "2021-07-12T12:32:45Z")

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Hello all, ui-table supports now sending msg.ui\_control messages to have more possibilities to style your dashboard table: or with grouping Example flow included but many other things should be possible. This Exam…

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## [Flow rate node : Output not in msg object](https://discourse.nodered.org/t/flow-rate-node-output-not-in-msg-object/48307)

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**Author:** [@ryan1998](https://discourse.nodered.org/u/ryan1998)\
**Replies:** 3\
**Last updated:** [12 July 2021 12:11 UTC](https://discourse.nodered.org/t/flow-rate-node-output-not-in-msg-object/48307 "2021-07-12T12:11:23Z")

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I am new to Node Red. I am using the "Rate" node. (node-red-contrib-rate (node) - Node-RED) The docs say that the output is "msg.rate". When I add a debug and set it to show the complete object, I get this: {"topic"…

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## [Need some help with float numbers](https://discourse.nodered.org/t/need-some-help-with-float-numbers/48292)

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**Author:** [@Aivaras](https://discourse.nodered.org/u/Aivaras)\
**Replies:** 10\
**Last updated:** [12 July 2021 11:25 UTC](https://discourse.nodered.org/t/need-some-help-with-float-numbers/48292 "2021-07-12T11:25:36Z")

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Hi, I have some difficulties with float numbers. I am usind node-red modbus to read some modbus values. I read two values and they are in array \[34853, 200\]. I need to convert that first number to negative float. Can so…

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## [How can I use ui like multi-screen(dialog)?](https://discourse.nodered.org/t/how-can-i-use-ui-like-multi-screen-dialog/48286)

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**Author:** [@jlian168](https://discourse.nodered.org/u/jlian168)\
**Replies:** 1\
**Last updated:** [12 July 2021 10:05 UTC](https://discourse.nodered.org/t/how-can-i-use-ui-like-multi-screen-dialog/48286 "2021-07-12T10:05:07Z")

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Dear All : Like title, My mean is like below at one screen : into into main -\> dialog1 -\> dialog2 exit exit Thank u.

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## [How can I use UI standalone?](https://discourse.nodered.org/t/how-can-i-use-ui-standalone/48285)

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**Author:** [@jlian168](https://discourse.nodered.org/u/jlian168)\
**Replies:** 10\
**Last updated:** [12 July 2021 09:44 UTC](https://discourse.nodered.org/t/how-can-i-use-ui-standalone/48285 "2021-07-12T09:44:56Z")

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Dear All : Like title, No need flow edit just ui ...Can and How? Thank u

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## [Pause flows from cmd line](https://discourse.nodered.org/t/pause-flows-from-cmd-line/48293)

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**Author:** [@JoshuaG](https://discourse.nodered.org/u/JoshuaG)\
**Replies:** 3\
**Last updated:** [12 July 2021 09:28 UTC](https://discourse.nodered.org/t/pause-flows-from-cmd-line/48293 "2021-07-12T09:28:40Z")

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I'm running my node from within a portainer container system and one of my flows has ran away and now I cannot manage the node from the web interface, does anyone know a command i can use from the console to pause the fl…

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## [How can I initial all node and send out when ui is first start?](https://discourse.nodered.org/t/how-can-i-initial-all-node-and-send-out-when-ui-is-first-start/48287)

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**Author:** [@jlian168](https://discourse.nodered.org/u/jlian168)\
**Replies:** 4\
**Last updated:** [12 July 2021 08:29 UTC](https://discourse.nodered.org/t/how-can-i-initial-all-node-and-send-out-when-ui-is-first-start/48287 "2021-07-12T08:29:03Z")

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Dear All : Does nore-red can do that like title? Thank u.

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## [I'm node-red stupid and need help](https://discourse.nodered.org/t/im-node-red-stupid-and-need-help/48279)

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**Author:** [@Jackob25](https://discourse.nodered.org/u/Jackob25)\
**Replies:** 16\
**Last updated:** [12 July 2021 00:48 UTC](https://discourse.nodered.org/t/im-node-red-stupid-and-need-help/48279 "2021-07-12T00:48:59Z")

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I have a plethora of problems. My largest is I have a gauge that I want to track the amount of hints given to someone (in an escape room) and I can't figure out how to progress the gauge by one with the click of a button…

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## [Using values from entities directly in function nodes](https://discourse.nodered.org/t/using-values-from-entities-directly-in-function-nodes/48267)

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**Author:** [@RonMa](https://discourse.nodered.org/u/RonMa)\
**Replies:** 13\
**Last updated:** [12 July 2021 02:19 UTC](https://discourse.nodered.org/t/using-values-from-entities-directly-in-function-nodes/48267 "2021-07-12T02:19:20Z")

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Hi there, I´m again struggling with my "Home Assistant" integration in Node Red which actually provides global variables for each entity of the system. For what reason ever, all values are provided formated as a string …

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## [Template node cannot receive POST data correctly](https://discourse.nodered.org/t/template-node-cannot-receive-post-data-correctly/48171)

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**Author:** [@homeuser](https://discourse.nodered.org/u/homeuser)\
**Replies:** 2\
**Last updated:** [12 July 2021 02:12 UTC](https://discourse.nodered.org/t/template-node-cannot-receive-post-data-correctly/48171 "2021-07-12T02:12:22Z")

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Hi, I tried to retrieve data in template node from POST by AJAX. However, data is returned in the header and not in the body. Attached is my flow. Help is much appreciated. \[{"id":"1683bd9a.5e0a02","type":"tab","label…

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## [Sending Json data in PHP url to WhatsAPP](https://discourse.nodered.org/t/sending-json-data-in-php-url-to-whatsapp/48231)

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**Author:** [@tramanah](https://discourse.nodered.org/u/tramanah)\
**Replies:** 4\
**Last updated:** [12 July 2021 00:14 UTC](https://discourse.nodered.org/t/sending-json-data-in-php-url-to-whatsapp/48231 "2021-07-12T00:14:24Z")

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Hi , I am trying to send json data in API WhatsApp. But unsuccessful https://api.callmebot.com/whatsapp.php?phone=+6XXXXXXXXX&text={{payload}}&apikey=XXXXX json = {"name":"pippo","surname":"topolino","street":"blablab…

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## [Change request url for Vattenfall API automatically every day](https://discourse.nodered.org/t/change-request-url-for-vattenfall-api-automatically-every-day/48255)

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**Author:** [@masteroftherings](https://discourse.nodered.org/u/masteroftherings)\
**Replies:** 4\
**Last updated:** [12 July 2021 00:03 UTC](https://discourse.nodered.org/t/change-request-url-for-vattenfall-api-automatically-every-day/48255 "2021-07-12T00:03:29Z")

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Hi guys, I'm new in Node Red! I live in Sweden and I have the swedish electricity company Vattenfall as my electricity supplier. They have an API that publishes tomorrow electricity price hour by hour. The problem is t…

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## [Uibuilder - next release (v4) - now available for beta testing](https://discourse.nodered.org/t/uibuilder-next-release-v4-now-available-for-beta-testing/47601)

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**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 16\
**Last updated:** [11 July 2021 19:11 UTC](https://discourse.nodered.org/t/uibuilder-next-release-v4-now-available-for-beta-testing/47601 "2021-07-11T19:11:44Z")

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Hi all, just giving some advanced notice of uibuilder v4 which I'm hoping will be the next release and not too far away. Jumping from v3 to v4 due to some breaking changes. Please do get in touch if you think that any o…

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## [How to change Json text](https://discourse.nodered.org/t/how-to-change-json-text/48273)

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**Author:** [@ryan1998](https://discourse.nodered.org/u/ryan1998)\
**Replies:** 1\
**Last updated:** [11 July 2021 17:20 UTC](https://discourse.nodered.org/t/how-to-change-json-text/48273 "2021-07-11T17:20:37Z")

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Hi all. Very new to Node Red. I have an MQTT node, with this output: Preformatted text{"topic":"flow-meter/heartbeat7","payload":"+112","qos":0,"retain":false,"\_msgid":"rf6226f9.aug622"} I want to use a change node t…

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## [Logic for input value](https://discourse.nodered.org/t/logic-for-input-value/48153)

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**Author:** [@Stes](https://discourse.nodered.org/u/Stes)\
**Replies:** 13\
**Last updated:** [11 July 2021 17:12 UTC](https://discourse.nodered.org/t/logic-for-input-value/48153 "2021-07-11T17:12:18Z")

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I have 4 inputs, and Input payload can be one of them ("x", "y" or "z"). And if payload is "z" then it with show msg.payload "1" otherwise zero, and among 4 inputs if atleast one input is "z" then the msg.payload is "1" …

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## [Communication via Modbus to bus coupler (Beckhoff)](https://discourse.nodered.org/t/communication-via-modbus-to-bus-coupler-beckhoff/48218)

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**Author:** [@Crashy77](https://discourse.nodered.org/u/Crashy77)\
**Replies:** 10\
**Last updated:** [11 July 2021 15:37 UTC](https://discourse.nodered.org/t/communication-via-modbus-to-bus-coupler-beckhoff/48218 "2021-07-11T15:37:35Z")

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Hi guys. I´m trying to communicate with a Beckhoff bus coupler BK9000. It´s a ethernet based coupler and reading inputs works. But I´m not able to write an output. Does anybody got this working ? Thanks. Thanks in …

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## [A better way to Modbus?](https://discourse.nodered.org/t/a-better-way-to-modbus/47851)

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**Author:** [@dleberfinger](https://discourse.nodered.org/u/dleberfinger)\
**Replies:** 10\
**Last updated:** [11 July 2021 11:16 UTC](https://discourse.nodered.org/t/a-better-way-to-modbus/47851 "2021-07-11T11:16:15Z")

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I'm trying to communicate with 12 different devices over modbus TCP. I have an ethernet connection to each device and I'm running Node Red on a Raspberry Pi which is also hardwired to the switch. I've managed to get it …

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## [Inject node with multiple payload and topic](https://discourse.nodered.org/t/inject-node-with-multiple-payload-and-topic/48265)

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**Author:** [@tpbillund](https://discourse.nodered.org/u/tpbillund)\
**Replies:** 5\
**Last updated:** [11 July 2021 11:12 UTC](https://discourse.nodered.org/t/inject-node-with-multiple-payload-and-topic/48265 "2021-07-11T11:12:27Z")

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Hi If I need to use an inject node and need to work with two msg.topic where the topic text is: zigbee2mqtt/name1/set zigbee2mqtt/name2/set And name1 is using one payload and name2 another payload, how can I make the…

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## [\[Announce\] node-red-contrib-redplc-module (Using redPlc module nodes without ladder logic)](https://discourse.nodered.org/t/announce-node-red-contrib-redplc-module-using-redplc-module-nodes-without-ladder-logic/40441)

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**Author:** [@iiot2k](https://discourse.nodered.org/u/iiot2k)\
**Replies:** 1\
**Last updated:** [11 July 2021 10:53 UTC](https://discourse.nodered.org/t/announce-node-red-contrib-redplc-module-using-redplc-module-nodes-without-ladder-logic/40441 "2021-07-11T10:53:25Z")

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Many users ask me how use the redPlc module nodes (e.g mcp23008 or gpio) without ladder logic. For this, I develope nodes for get/set the module nodes with data from/to other Node-Red nodes (e.g Dashboard or MQTT). H…

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## [Tuya-smart-device and tuya-smart-device-generic node questions](https://discourse.nodered.org/t/tuya-smart-device-and-tuya-smart-device-generic-node-questions/48248)

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**Author:** [@grant1](https://discourse.nodered.org/u/grant1)\
**Replies:** 4\
**Last updated:** [11 July 2021 09:35 UTC](https://discourse.nodered.org/t/tuya-smart-device-and-tuya-smart-device-generic-node-questions/48248 "2021-07-11T09:35:33Z")

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I am trying to get either of the above nodes to work. I downloaded the sample flow and it seems straightforward enough. I have a wifi lightswitch that is connected to my wifi and I obtained the DeviceID and DeviceKey. …

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## [Help with a webscrap](https://discourse.nodered.org/t/help-with-a-webscrap/47694)

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**Author:** [@leftymuller](https://discourse.nodered.org/u/leftymuller)\
**Replies:** 6\
**Last updated:** [11 July 2021 06:30 UTC](https://discourse.nodered.org/t/help-with-a-webscrap/47694 "2021-07-11T06:30:08Z")

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Hello All! Can somebody lend me a hand.. HTML is not my strong point I want to get the oil price from this website Crude Oil Prices - Brent And WTI Oil Price Per Barrel (oilcrudeprice.com) I can find the figure I need …

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## [Generate offline graph and save in PNG](https://discourse.nodered.org/t/generate-offline-graph-and-save-in-png/1802)

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**Author:** [@nygma2004](https://discourse.nodered.org/u/nygma2004)\
**Replies:** 4\
**Last updated:** [11 July 2021 01:04 UTC](https://discourse.nodered.org/t/generate-offline-graph-and-save-in-png/1802 "2021-07-11T01:04:17Z")

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Hi All, I am looking for a way to generate a graph in the background and save it as a PNG or similar image format. I want to be able to request a graph in Telegram and have Node Red send the image of the generated graph…

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## [Road traffic information / arrival time](https://discourse.nodered.org/t/road-traffic-information-arrival-time/48214)

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**Author:** [@moormel](https://discourse.nodered.org/u/moormel)\
**Replies:** 6\
**Last updated:** [10 July 2021 22:59 UTC](https://discourse.nodered.org/t/road-traffic-information-arrival-time/48214 "2021-07-10T22:59:40Z")

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Hi, does anyone know a way to obtain road traffic information and estimated arrival time from point to point (using car) without using google maps API? Perfect if available in Poland. Cheers!

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## [\[ANNOUNCE\] node-red-node-ui-vega](https://discourse.nodered.org/t/announce-node-red-node-ui-vega/14788)

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**Author:** [@nisiyama](https://discourse.nodered.org/u/nisiyama)\
**Replies:** 20\
**Last updated:** [10 July 2021 19:33 UTC](https://discourse.nodered.org/t/announce-node-red-node-ui-vega/14788 "2021-07-10T19:33:57Z")

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Hi, I have released new Node-RED Dashboard widget node for declarative data visualization using Vega visualization grammar. (thank you Dave for support!) Vega is a visualization grammar and framework for visualizi…

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## [Function node: How to "OR" operate](https://discourse.nodered.org/t/function-node-how-to-or-operate/48245)

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**Author:** [@RonMa](https://discourse.nodered.org/u/RonMa)\
**Replies:** 3\
**Last updated:** [10 July 2021 12:50 UTC](https://discourse.nodered.org/t/function-node-how-to-or-operate/48245 "2021-07-10T12:50:09Z")

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Hi guys, For one of my Alexa based flows, I´m trying to define the room in which the echo device is located that one is speaking to. Unfortunately, the corresponding "Alexa Event" node does not deliver the information a…

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