# Latest

**URL:** https://discourse.nodered.org/latest.md?page=1326

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

**Page:** 1327

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## [Fail to remove node that crashes Node Red on start](https://discourse.nodered.org/t/fail-to-remove-node-that-crashes-node-red-on-start/6893)

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**Author:** [@tobiasselin](https://discourse.nodered.org/u/tobiasselin)\
**Replies:** 8\
**Last updated:** [17 January 2019 13:34 UTC](https://discourse.nodered.org/t/fail-to-remove-node-that-crashes-node-red-on-start/6893 "2019-01-17T13:34:57Z")

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I've run into this problem, which crashes Node Red: TypeError: Cannot read property 'heartBeat' of null at Hub.onMessage (/Users/Admin/.node-red/node\_modules/node-xiaomi-smart-home/build/Hub.js:70:16) at Socket.emit (…

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## [Manipulating Template from different Node](https://discourse.nodered.org/t/manipulating-template-from-different-node/6880)

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**Author:** [@m.ristau](https://discourse.nodered.org/u/m.ristau)\
**Replies:** 2\
**Last updated:** [17 January 2019 10:59 UTC](https://discourse.nodered.org/t/manipulating-template-from-different-node/6880 "2019-01-17T10:59:17Z")

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I have built a UI with node-red-dashboard. Basically i have several arduinos with ethernet shield sending data to my node-red instance, each data will be parsed by a function node and then generate some html with a ui-t…

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## [Import querySelector function](https://discourse.nodered.org/t/import-queryselector-function/6884)

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**Author:** [@wojtula](https://discourse.nodered.org/u/wojtula)\
**Replies:** 11\
**Last updated:** [17 January 2019 10:32 UTC](https://discourse.nodered.org/t/import-queryselector-function/6884 "2019-01-17T10:32:09Z")

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Hello, I was wondering if could I import such function like querySelector or querySelectorAll to use it inside function node? I've tried with: var doc = msg.payload; var querySelector = global.get('querySelector'); …

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## [Blog site using Mongo db](https://discourse.nodered.org/t/blog-site-using-mongo-db/6904)

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**Author:** [@amrutha](https://discourse.nodered.org/u/amrutha)\
**Replies:** 1\
**Last updated:** [17 January 2019 08:46 UTC](https://discourse.nodered.org/t/blog-site-using-mongo-db/6904 "2019-01-17T08:46:24Z")

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This is my flow. I have created a blog site using mongo db. but i cannot able to retrieve my blog site. there are no errors in the debug sidebar. please help me with it \[{"id":"f28d0390.5bc93","type":"http in","z":"253…

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## [Share property information](https://discourse.nodered.org/t/share-property-information/6912)

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**Author:** [@Simo219h](https://discourse.nodered.org/u/Simo219h)\
**Replies:** 2\
**Last updated:** [17 January 2019 09:14 UTC](https://discourse.nodered.org/t/share-property-information/6912 "2019-01-17T09:14:47Z")

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Hi, I am trying to make a node to control some digital outputs. I am facing a problem, because my digital outputs have the possibility to use external voltage reference. I have made the node, but I cannot seem to find a…

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## [Can't get the blog post](https://discourse.nodered.org/t/cant-get-the-blog-post/6899)

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**Author:** [@RahulMathavan](https://discourse.nodered.org/u/RahulMathavan)\
**Replies:** 7\
**Last updated:** [17 January 2019 09:03 UTC](https://discourse.nodered.org/t/cant-get-the-blog-post/6899 "2019-01-17T09:03:46Z")

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I have created a blog site in node red. I have used mongodb database to create a collection and store my content. Everything is working fine, there is no error in debug side bar. But I cannot able to display my blog page …

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## [SMS app using node red](https://discourse.nodered.org/t/sms-app-using-node-red/6897)

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**Author:** [@RahulMathavan](https://discourse.nodered.org/u/RahulMathavan)\
**Replies:** 1\
**Last updated:** [17 January 2019 07:39 UTC](https://discourse.nodered.org/t/sms-app-using-node-red/6897 "2019-01-17T07:39:04Z")

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I am trying to create an SMS app, I need to build the SMS AT command...I saw a post in a website they have used serial port. But they used raspberry pi and portable wifi dongle. Here I am using only node red and a wifi c…

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## [COAP server with node-red](https://discourse.nodered.org/t/coap-server-with-node-red/6898)

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**Author:** [@manal](https://discourse.nodered.org/u/manal)\
**Replies:** 0\
**Last updated:** [17 January 2019 03:15 UTC](https://discourse.nodered.org/t/coap-server-with-node-red/6898 "2019-01-17T03:15:39Z")

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Hi All, I want to run CoAP server in raspberry pi where I installed the node-red, I found that there is a node for MQTT broker, so is there any node for CoAP server? or I should install it separately as software. Tha…

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## [Operator && doesn't work, unbelievable](https://discourse.nodered.org/t/operator-doesnt-work-unbelievable/6843)

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**Author:** [@GiovanniG](https://discourse.nodered.org/u/GiovanniG)\
**Replies:** 10\
**Last updated:** [16 January 2019 20:49 UTC](https://discourse.nodered.org/t/operator-doesnt-work-unbelievable/6843 "2019-01-16T20:49:22Z")

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Hi everone, I have this semplified code, I omiss the list of commands, ony the condition: var IO1\_0 = 1; if (IO1\_0 && 0) I have false, ok if (IO1\_0 && 1) I have true ok if (IO1\_0 && 2) I have true WHY? if (IO1\_0 …

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## [Unable to use oracledb node](https://discourse.nodered.org/t/unable-to-use-oracledb-node/6886)

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**Author:** [@tomasjuarez](https://discourse.nodered.org/u/tomasjuarez)\
**Replies:** 2\
**Last updated:** [16 January 2019 18:05 UTC](https://discourse.nodered.org/t/unable-to-use-oracledb-node/6886 "2019-01-16T18:05:35Z")

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Hi! This is my first day using node-RED, so I'm really new. I'm trying to use the oracledb node to perform some inserts into a table. Just a very simple try. The insert is working, but the problem is that bind variable…

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## [Sub flow management](https://discourse.nodered.org/t/sub-flow-management/6879)

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**Author:** [@Lionel](https://discourse.nodered.org/u/Lionel)\
**Replies:** 1\
**Last updated:** [16 January 2019 09:28 UTC](https://discourse.nodered.org/t/sub-flow-management/6879 "2019-01-16T09:28:03Z")

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Hi, In a project, we have created many sub flows dedicated to a feature, and all our projects need this feature. So is it possible to share sub flows from a project to an another ?

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## [Is there a way to insert a break row in the label programmatically?](https://discourse.nodered.org/t/is-there-a-way-to-insert-a-break-row-in-the-label-programmatically/6852)

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**Author:** [@gbove73](https://discourse.nodered.org/u/gbove73)\
**Replies:** 2\
**Last updated:** [16 January 2019 08:36 UTC](https://discourse.nodered.org/t/is-there-a-way-to-insert-a-break-row-in-the-label-programmatically/6852 "2019-01-16T08:36:41Z")

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Hi all, Is there a way to insert a break row in the label programmatically? for exampe: label: this.name + "\\n" + this.otherattribute Thanks in advance.

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## [Line char - error](https://discourse.nodered.org/t/line-char-error/6871)

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**Author:** [@robjakobs](https://discourse.nodered.org/u/robjakobs)\
**Replies:** 1\
**Last updated:** [16 January 2019 07:13 UTC](https://discourse.nodered.org/t/line-char-error/6871 "2019-01-16T07:13:52Z")

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After reboots my 'Line Chart' nodes stop working properly i.e. they plot all new input data at the same timestamp so the chart just displays a vertical line instead of a nice graph varying over time. Has anybody else ex…

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## [Mosquitto Log Files missing](https://discourse.nodered.org/t/mosquitto-log-files-missing/6860)

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**Author:** [@SteveMann](https://discourse.nodered.org/u/SteveMann)\
**Replies:** 4\
**Last updated:** [16 January 2019 07:11 UTC](https://discourse.nodered.org/t/mosquitto-log-files-missing/6860 "2019-01-16T07:11:41Z")

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I have been chasing down some duplicate client names on my MQTT devices, and frequently looking at the logfile: /var/log/mosquitto/mosquitto.log. However, today I noticed that the log file is simply missing. No file. …

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## [Mdashboard slight issue?](https://discourse.nodered.org/t/mdashboard-slight-issue/2592)

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**Author:** [@lowcbk](https://discourse.nodered.org/u/lowcbk)\
**Replies:** 44\
**Last updated:** [16 January 2019 00:02 UTC](https://discourse.nodered.org/t/mdashboard-slight-issue/2592 "2019-01-16T00:02:24Z")

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Hi All, I tried to pump random data into a Mdashboard gauge but nothing showed. Normal dashboard worked fine. Anyone can help would be appreciated! Here's the flow: \[{"id":"32dfc961.330d16","type":"inject","z":"c136be4…

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## [Cannot GET /mysite](https://discourse.nodered.org/t/cannot-get-mysite/6859)

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**Author:** [@ukjay](https://discourse.nodered.org/u/ukjay)\
**Replies:** 3\
**Last updated:** [15 January 2019 23:31 UTC](https://discourse.nodered.org/t/cannot-get-mysite/6859 "2019-01-15T23:31:55Z")

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Newbie here again I have searched & dabbled trying to get this working again http://localhost:1880/mysite mysite being a flow with a suitable http in like /tweetwx but getting cannot GET /tweetwx or whatever the url…

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## [Nodes from 6 months ago not showing up](https://discourse.nodered.org/t/nodes-from-6-months-ago-not-showing-up/6857)

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**Author:** [@blechdom](https://discourse.nodered.org/u/blechdom)\
**Replies:** 2\
**Last updated:** [15 January 2019 20:35 UTC](https://discourse.nodered.org/t/nodes-from-6-months-ago-not-showing-up/6857 "2019-01-15T20:35:52Z")

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Hello, I created three nodes six months ago. At the time, there was an issue with auto-recognizing new npm node-red-contrib nodes. Do I need to do something so they will be recognized? node-red-contrib-amcp node-red…

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## [Use scope in UI Nodes](https://discourse.nodered.org/t/use-scope-in-ui-nodes/6804)

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**Author:** [@Georg25](https://discourse.nodered.org/u/Georg25)\
**Replies:** 7\
**Last updated:** [15 January 2019 20:27 UTC](https://discourse.nodered.org/t/use-scope-in-ui-nodes/6804 "2019-01-15T20:27:32Z")

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Hi, I want to change the colors of the button using the ui\_picker. I save the new color globally in msg.colour. Can the UI node itself get the information from the scope? Is it enough if I write msg.colour in the field o…

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## [Xml2js problem registering](https://discourse.nodered.org/t/xml2js-problem-registering/6831)

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**Author:** [@ukjay](https://discourse.nodered.org/u/ukjay)\
**Replies:** 8\
**Last updated:** [15 January 2019 17:26 UTC](https://discourse.nodered.org/t/xml2js-problem-registering/6831 "2019-01-15T17:26:06Z")

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I'm not having any luck installing xml2js Can you help? Here is some info :-1: This is the flow address BBC Weather To Twitter https://flows.nodered.org/flow/0d98ac57a6ebf724def9 It requires xml2js, I've installed…

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## [Function to Convert 16 bit HEX value to float value](https://discourse.nodered.org/t/function-to-convert-16-bit-hex-value-to-float-value/6826)

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**Author:** [@bidyutper](https://discourse.nodered.org/u/bidyutper)\
**Replies:** 1\
**Last updated:** [15 January 2019 16:18 UTC](https://discourse.nodered.org/t/function-to-convert-16-bit-hex-value-to-float-value/6826 "2019-01-15T16:18:38Z")

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Hi!! I have a piece of code wriiten in c. How to do this in Node red function: Blockquote poutbuf\[1\] = FD; pOutbuf\[2\] = 6F; { short signal; float fsignal; signal = (short)(pOutbuf\[1\]\<\<8); signal += (short)(pOu…

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## [Exporting flows to external tools](https://discourse.nodered.org/t/exporting-flows-to-external-tools/6794)

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**Author:** [@mbenson](https://discourse.nodered.org/u/mbenson)\
**Replies:** 1\
**Last updated:** [15 January 2019 16:11 UTC](https://discourse.nodered.org/t/exporting-flows-to-external-tools/6794 "2019-01-15T16:11:22Z")

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I am completely new to Node Red but fairly experienced with Node. Is it reasonably feasible to write a plugin that reads a flow and exports it to a dissimilar file format? I have a software package that is fully functi…

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## [E-Mail sending not possible](https://discourse.nodered.org/t/e-mail-sending-not-possible/6845)

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**Author:** [@Tobi](https://discourse.nodered.org/u/Tobi)\
**Replies:** 3\
**Last updated:** [15 January 2019 16:09 UTC](https://discourse.nodered.org/t/e-mail-sending-not-possible/6845 "2019-01-15T16:09:41Z")

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Hi, I want to send and receive E-Mails via Node-RED. the e-mail is not delivered, in my gmail mailbox comes the following error message. 554 5.7.0 Reject, id = 30906-14 - spam: This message was blocked for security re…

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## [Multiple Flows "Execute" After I Deploy](https://discourse.nodered.org/t/multiple-flows-execute-after-i-deploy/6751)

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**Author:** [@Inshakoor](https://discourse.nodered.org/u/Inshakoor)\
**Replies:** 9\
**Last updated:** [15 January 2019 16:03 UTC](https://discourse.nodered.org/t/multiple-flows-execute-after-i-deploy/6751 "2019-01-15T16:03:12Z")

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Hey all, I'm a new Node-Red user and have had some guidance from a friend to get me going. I'm running the latest v8 version of Node-Red, Mosquitto Eclipse MQTT, and Homeseer (for my Z-wave devices). I've searched the …

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## [Motor Shields and Node Red](https://discourse.nodered.org/t/motor-shields-and-node-red/6676)

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**Author:** [@WillWelker](https://discourse.nodered.org/u/WillWelker)\
**Replies:** 10\
**Last updated:** [15 January 2019 15:57 UTC](https://discourse.nodered.org/t/motor-shields-and-node-red/6676 "2019-01-15T15:57:42Z")

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I think Node Red has broad applications in robotics and I was wondering if anyone can recommend some good motor shields that play nice with Node Red. Currently I am using Arduino over serial which works but it would be …

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## [Store RGB Values from Dashboard and activate them on sunset](https://discourse.nodered.org/t/store-rgb-values-from-dashboard-and-activate-them-on-sunset/6842)

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**Author:** [@flow86](https://discourse.nodered.org/u/flow86)\
**Replies:** 1\
**Last updated:** [15 January 2019 14:15 UTC](https://discourse.nodered.org/t/store-rgb-values-from-dashboard-and-activate-them-on-sunset/6842 "2019-01-15T14:15:19Z")

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Hi, i´d like to build an nice User-Interface for my House lights. For that i want to build a nice browser user interface: Get the RGB Value for the lights via 3 Sliders (=\>working) use an button to store the value on…

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## [Motozero and HC-SR04 Ultrasonic sensor](https://discourse.nodered.org/t/motozero-and-hc-sr04-ultrasonic-sensor/6818)

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**Author:** [@MR\_k10](https://discourse.nodered.org/u/MR_k10)\
**Replies:** 3\
**Last updated:** [15 January 2019 12:43 UTC](https://discourse.nodered.org/t/motozero-and-hc-sr04-ultrasonic-sensor/6818 "2019-01-15T12:43:35Z")

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I build a remote controlled robot with a Raspberry Pi zero and a MotoZero in Node-red. Now I would like to automize the robot with some ultrasonic eyes (HC-SR04 sensor), but the pins are used by the MotoZero. has somebod…

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## [Node Creation Questions](https://discourse.nodered.org/t/node-creation-questions/6830)

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**Author:** [@leedeokhee](https://discourse.nodered.org/u/leedeokhee)\
**Replies:** 2\
**Last updated:** [15 January 2019 12:43 UTC](https://discourse.nodered.org/t/node-creation-questions/6830 "2019-01-15T12:43:29Z")

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Hello, I have a question. If there are many nodes provided by Node-RED, can a person or company create nodes apart from these nodes? with his property.

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## [Node-red ended with exception](https://discourse.nodered.org/t/node-red-ended-with-exception/6825)

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**Author:** [@Hjh58](https://discourse.nodered.org/u/Hjh58)\
**Replies:** 2\
**Last updated:** [15 January 2019 12:10 UTC](https://discourse.nodered.org/t/node-red-ended-with-exception/6825 "2019-01-15T12:10:59Z")

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I am using the ping node for checking nodes to be alive. he error message: Jan 05:52:22 - Error: spawn ENOMEM at ChildProcess.spawn (internal/child\_process.js:372:11) at spawn (child\_process.js:544:9) at Timeout.\_onT…

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## [Chart Timezone Issue : X axis wrong](https://discourse.nodered.org/t/chart-timezone-issue-x-axis-wrong/6801)

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**Author:** [@Mathi78](https://discourse.nodered.org/u/Mathi78)\
**Replies:** 6\
**Last updated:** [15 January 2019 08:22 UTC](https://discourse.nodered.org/t/chart-timezone-issue-x-axis-wrong/6801 "2019-01-15T08:22:50Z")

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Hello guys, I found a behavior I can't explain, maybe you can help :slight\_smile: ! here is my test code : msg.payload = \[{ "series": \["A", "B", "C"\], "data": \[ \[{ "x": new Date(1504029632890).toUTCString(), "y": 5 …

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## [Cannot start Node-RED on MSYS2](https://discourse.nodered.org/t/cannot-start-node-red-on-msys2/6735)

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**Author:** [@BartButenaers](https://discourse.nodered.org/u/BartButenaers)\
**Replies:** 3\
**Last updated:** [15 January 2019 00:50 UTC](https://discourse.nodered.org/t/cannot-start-node-red-on-msys2/6735 "2019-01-15T00:50:28Z")

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Hi folks, I'm have been trying to debug FFmpeg to help somebody with another discussion. But no luck until now: I have installed MSYS2, VSCode, ... following this tutorial. Btw if anybody ever wants to reproduce it,…

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