# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=966

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

**Page:** 967

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## [White space in object names](https://discourse.nodered.org/t/white-space-in-object-names/629)

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**Author:** [@Meistro](https://discourse.nodered.org/u/Meistro)\
**Replies:** 1\
**Last updated:** [5 June 2018 18:27 UTC](https://discourse.nodered.org/t/white-space-in-object-names/629 "2018-06-05T18:27:42Z")

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Hi. I am trying to convert some data so I can transfer from one software to another without the need to manually enter lines and lines of data. I have everything working except in the import on new software it’s looking …

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## [From array message, get specific columns](https://discourse.nodered.org/t/from-array-message-get-specific-columns/620)

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**Author:** [@DisHarmonious](https://discourse.nodered.org/u/DisHarmonious)\
**Replies:** 1\
**Last updated:** [5 June 2018 15:11 UTC](https://discourse.nodered.org/t/from-array-message-get-specific-columns/620 "2018-06-05T15:11:43Z")

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Hello, my flow is the one at links. At the top part of the flow, i want to get from message array, the columns named “high” and “low”. What I have done returns only the first row of 60+ messages and I don’t know really k…

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## [MySQL Node doesn't pass payload?](https://discourse.nodered.org/t/mysql-node-doesnt-pass-payload/603)

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**Author:** [@fraser](https://discourse.nodered.org/u/fraser)\
**Replies:** 2\
**Last updated:** [4 June 2018 12:22 UTC](https://discourse.nodered.org/t/mysql-node-doesnt-pass-payload/603 "2018-06-04T12:22:04Z")

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I’m writing a flow which processes an HTML form. In order to carry out the form processing I need to query a MySQL/mariadb database and act on the returned query. So far, so normal, I’ve got the queries working fine. Th…

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## [How to configure Mongodb node and insert the data in Local Mongodb?](https://discourse.nodered.org/t/how-to-configure-mongodb-node-and-insert-the-data-in-local-mongodb/594)

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**Author:** [@variyaSandip](https://discourse.nodered.org/u/variyaSandip)\
**Replies:** 3\
**Last updated:** [4 June 2018 10:07 UTC](https://discourse.nodered.org/t/how-to-configure-mongodb-node-and-insert-the-data-in-local-mongodb/594 "2018-06-04T10:07:38Z")

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I configure mongodb node to my local mongodb URL : mongodb/localhost:27017/test Name : Insert and then Deploy Getting the error "Invalid schema, expected mongodb or mongodb+srv" Please any one, share configuration t…

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## [Gpio mqtt button light](https://discourse.nodered.org/t/gpio-mqtt-button-light/578)

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**Author:** [@neodev](https://discourse.nodered.org/u/neodev)\
**Replies:** 5\
**Last updated:** [4 June 2018 08:47 UTC](https://discourse.nodered.org/t/gpio-mqtt-button-light/578 "2018-06-04T08:47:42Z")

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Hi i’m new i want know a solution on a problem USE CASE I have a central raspberry node that use as a cntral pannel for use alla my house then when i push a button on a central send a message mqtt on client node1 n…

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## [Marketing Automation with Node-RED](https://discourse.nodered.org/t/marketing-automation-with-node-red/599)

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**Author:** [@dipak](https://discourse.nodered.org/u/dipak)\
**Replies:** 4\
**Last updated:** [4 June 2018 08:39 UTC](https://discourse.nodered.org/t/marketing-automation-with-node-red/599 "2018-06-04T08:39:54Z")

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Can Node-RED be used for Marketing Automation?, Any idea?

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## [Pushing objects in to array](https://discourse.nodered.org/t/pushing-objects-in-to-array/587)

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**Author:** [@toni](https://discourse.nodered.org/u/toni)\
**Replies:** 7\
**Last updated:** [4 June 2018 07:57 UTC](https://discourse.nodered.org/t/pushing-objects-in-to-array/587 "2018-06-04T07:57:43Z")

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Hello, Quite new to node-red but have a bit of a confusing thing that i would like to have clarification from more experienced node-red developers. I have a function which i would like to use to return an array of obje…

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## [How to release MySQL connection](https://discourse.nodered.org/t/how-to-release-mysql-connection/499)

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**Author:** [@ad-He](https://discourse.nodered.org/u/ad-He)\
**Replies:** 15\
**Last updated:** [4 June 2018 00:49 UTC](https://discourse.nodered.org/t/how-to-release-mysql-connection/499 "2018-06-04T00:49:36Z")

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I use node module node-red-node-mysql to connect my MySQL DB. It works fine at begining.When I develop a lot of node red app with the same DataBase. I have some issue appear there is too many connection to my databae. …

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## [Research on "multiple outputs" question](https://discourse.nodered.org/t/research-on-multiple-outputs-question/567)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 2\
**Last updated:** [3 June 2018 20:55 UTC](https://discourse.nodered.org/t/research-on-multiple-outputs-question/567 "2018-06-03T20:55:15Z")

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I’ve been reading about multiple outputs. Multiple outputs I can’t use that on the function node - can I? I tried and put this in it - to get a feel for it: msg.payload = "blah"; return \[msg, msg\]; But when I deploy…

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## [Using node-red-contrib-i2c to display text on LCD RGB from Seeed](https://discourse.nodered.org/t/using-node-red-contrib-i2c-to-display-text-on-lcd-rgb-from-seeed/537)

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**Author:** [@iotman](https://discourse.nodered.org/u/iotman)\
**Replies:** 7\
**Last updated:** [3 June 2018 16:35 UTC](https://discourse.nodered.org/t/using-node-red-contrib-i2c-to-display-text-on-lcd-rgb-from-seeed/537 "2018-06-03T16:35:22Z")

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Hi, I have the Grove LCD RGB from Seeed and I am trying to use node-red-contrib-i2c to display text on it. There are 3 nodes: one to scan for devices on i2c bus, one to retrieve data from a device, and one to send data t…

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## [Stuck with how to detect this](https://discourse.nodered.org/t/stuck-with-how-to-detect-this/563)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 2\
**Last updated:** [3 June 2018 03:26 UTC](https://discourse.nodered.org/t/stuck-with-how-to-detect-this/563 "2018-06-03T03:26:43Z")

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Sorry folks, maybe I should know by now, but I seem to be missing something. This is a BASIC flow. Walk through: Signal comes in. It is \[\] (null). First two nodes. I show that. First debug node. I want to chan…

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## [Node-red-node-pi-mcp3008 always return 0](https://discourse.nodered.org/t/node-red-node-pi-mcp3008-always-return-0/560)

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**Author:** [@excessnet](https://discourse.nodered.org/u/excessnet)\
**Replies:** 1\
**Last updated:** [2 June 2018 23:39 UTC](https://discourse.nodered.org/t/node-red-node-pi-mcp3008-always-return-0/560 "2018-06-02T23:39:19Z")

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Hello there, I’ve been trying for several hours to figure out why the MCP3008 always read “0” on node-red. I’ve confirmed with many site and also using the Adafruit Library ( https://learn.adafruit.com/raspberry-pi-ana…

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## [Adding new input and output types](https://discourse.nodered.org/t/adding-new-input-and-output-types/554)

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**Author:** [@mbenson](https://discourse.nodered.org/u/mbenson)\
**Replies:** 1\
**Last updated:** [2 June 2018 19:44 UTC](https://discourse.nodered.org/t/adding-new-input-and-output-types/554 "2018-06-02T19:44:59Z")

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I just discovered Node-RED and think it might be a very interesting add to another open source project, or vice versa. Are the input and output types extensible? Would it be practical to add a new input type that can r…

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## [Deploy button disable](https://discourse.nodered.org/t/deploy-button-disable/556)

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**Author:** [@chrisious2](https://discourse.nodered.org/u/chrisious2)\
**Replies:** 1\
**Last updated:** [2 June 2018 19:21 UTC](https://discourse.nodered.org/t/deploy-button-disable/556 "2018-06-02T19:21:41Z")

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Hello I have a problem with the button deploy it is shown as grey and it is disable and I can’t press it .

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## [Node-red.org still pointing at google groups mailing list](https://discourse.nodered.org/t/node-red-org-still-pointing-at-google-groups-mailing-list/527)

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**Author:** [@wb666greene](https://discourse.nodered.org/u/wb666greene)\
**Replies:** 2\
**Last updated:** [1 June 2018 16:24 UTC](https://discourse.nodered.org/t/node-red-org-still-pointing-at-google-groups-mailing-list/527 "2018-06-01T16:24:04Z")

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I just joined after a banner on the google groups list pointed me here after revisiting the list via a search. First time in quite a while, as node-red has been working very well for me. But I may follow up with an iss…

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## [Running out of room for nodes?](https://discourse.nodered.org/t/running-out-of-room-for-nodes/524)

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**Author:** [@Northof49](https://discourse.nodered.org/u/Northof49)\
**Replies:** 4\
**Last updated:** [1 June 2018 16:20 UTC](https://discourse.nodered.org/t/running-out-of-room-for-nodes/524 "2018-06-01T16:20:32Z")

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I have run out of room to add any more nodes in an organized manner. I am at the bottom of the grid on my tab. What do I do? If I start another tab, does that tab run simultaneously? Is there a limit to the number of…

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## [OWM: "Invalid API Key provided"](https://discourse.nodered.org/t/owm-invalid-api-key-provided/519)

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**Author:** [@Werner](https://discourse.nodered.org/u/Werner)\
**Replies:** 0\
**Last updated:** [1 June 2018 11:32 UTC](https://discourse.nodered.org/t/owm-invalid-api-key-provided/519 "2018-06-01T11:32:55Z")

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I made use of this node before, and also if I am using the API-key in the browser: no probs to get all the weather data. But since I re-arranged my flows a little bit, I am not able to get weather datas on NR. Always the…

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## [Running Node-RED on Windows](https://discourse.nodered.org/t/running-node-red-on-windows/500)

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**Author:** [@Madhumati](https://discourse.nodered.org/u/Madhumati)\
**Replies:** 6\
**Last updated:** [31 May 2018 08:02 UTC](https://discourse.nodered.org/t/running-node-red-on-windows/500 "2018-05-31T08:02:44Z")

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Hi, can I run node-RED on my windows 7/ windows 8 OS system? where I can get exe to run? BR Madhumati

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## [Increment or decrement a value between two ranges](https://discourse.nodered.org/t/increment-or-decrement-a-value-between-two-ranges/477)

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**Author:** [@Northof49](https://discourse.nodered.org/u/Northof49)\
**Replies:** 24\
**Last updated:** [31 May 2018 05:23 UTC](https://discourse.nodered.org/t/increment-or-decrement-a-value-between-two-ranges/477 "2018-05-31T05:23:20Z")

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I want to finely control the position of a servo by having two buttons, one which will move it in one direction (as far as a pre-set limit) and the other to move it in the opposite towards the other limit. So I picture …

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## [Inject Node: "flow." and "global." variables?](https://discourse.nodered.org/t/inject-node-flow-and-global-variables/122)

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**Author:** [@Eric](https://discourse.nodered.org/u/Eric)\
**Replies:** 2\
**Last updated:** [31 May 2018 01:28 UTC](https://discourse.nodered.org/t/inject-node-flow-and-global-variables/122 "2018-05-31T01:28:55Z")

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Hello. The Inject Node provides ways to inject strings, numbers, booleans, timestamp, and also “flow.” and “global.”. What’s the “flow.” and “global.” do? How are people using it? These are such common terms I’m havi…

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## [One node-red device to ctl another node-red device](https://discourse.nodered.org/t/one-node-red-device-to-ctl-another-node-red-device/449)

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**Author:** [@gbond](https://discourse.nodered.org/u/gbond)\
**Replies:** 19\
**Last updated:** [30 May 2018 23:46 UTC](https://discourse.nodered.org/t/one-node-red-device-to-ctl-another-node-red-device/449 "2018-05-30T23:46:29Z")

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is there a way to get one node red to send commands to another node-red device

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## [Create HTTP endpoint on node-red startup](https://discourse.nodered.org/t/create-http-endpoint-on-node-red-startup/494)

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**Author:** [@benjamin](https://discourse.nodered.org/u/benjamin)\
**Replies:** 1\
**Last updated:** [30 May 2018 23:10 UTC](https://discourse.nodered.org/t/create-http-endpoint-on-node-red-startup/494 "2018-05-30T23:10:21Z")

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Hi everyone, what I am trying to achieve is to have an HTTP endpoint available that serves information for several different nodes. I am aware of the solution brought forward here. But my requirement is a little differ…

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## [Installing The Things Network palette fails without GIT](https://discourse.nodered.org/t/installing-the-things-network-palette-fails-without-git/481)

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**Author:** [@smbunn](https://discourse.nodered.org/u/smbunn)\
**Replies:** 7\
**Last updated:** [30 May 2018 22:19 UTC](https://discourse.nodered.org/t/installing-the-things-network-palette-fails-without-git/481 "2018-05-30T22:19:17Z")

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I have a well established Node-Red implementation running on a Google Cloud Platform machine under Ubuntu 16.04. I recently tried adding The Things Network (node-red-contrib-ttn) whcih failed. After working through on …

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## [Node-red won't work any more](https://discourse.nodered.org/t/node-red-wont-work-any-more/497)

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**Author:** [@hary](https://discourse.nodered.org/u/hary)\
**Replies:** 2\
**Last updated:** [30 May 2018 18:07 UTC](https://discourse.nodered.org/t/node-red-wont-work-any-more/497 "2018-05-30T18:07:10Z")

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Hi. After installing npm i node-red-node-serialport my node-red worked once with serial communication also working. Then after a reboot, it spits the following ! $ node-red 30 May 19:02:28 - \[info\] Welcome to Node…

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## [Node-red-node-pi-sense-hat - DOCUP](https://discourse.nodered.org/t/node-red-node-pi-sense-hat-docup/451)

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**Author:** [@zenofmud](https://discourse.nodered.org/u/zenofmud)\
**Replies:** 4\
**Last updated:** [30 May 2018 06:54 UTC](https://discourse.nodered.org/t/node-red-node-pi-sense-hat-docup/451 "2018-05-30T06:54:13Z")

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Node-RED version: v0.18.7 Node.js version: v8.11.2 node-red-node-pi-sense-hat@0.0.15 I spent a lot of time trying to get the flip to work. The help says: Flip the screen Format: F axis must be either H or V to fli…

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## [Trying to evaluate time to use 2 different constants for energy usage](https://discourse.nodered.org/t/trying-to-evaluate-time-to-use-2-different-constants-for-energy-usage/285)

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**Author:** [@jonyan](https://discourse.nodered.org/u/jonyan)\
**Replies:** 8\
**Last updated:** [29 May 2018 21:05 UTC](https://discourse.nodered.org/t/trying-to-evaluate-time-to-use-2-different-constants-for-energy-usage/285 "2018-05-29T21:05:02Z")

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Hi Everyone, I am trying to create logic using the Function node where: (1) peak times (3PM - 8PM), I assign and use one peak rate, a constant, that will be used as a factor (2) non-peak times (outside of 3-8), would …

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## [Debug node does not display a property?](https://discourse.nodered.org/t/debug-node-does-not-display-a-property/459)

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**Author:** [@Andrei](https://discourse.nodered.org/u/Andrei)\
**Replies:** 2\
**Last updated:** [29 May 2018 16:10 UTC](https://discourse.nodered.org/t/debug-node-does-not-display-a-property/459 "2018-05-29T16:10:54Z")

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I wanted to test if Node-Red would accept to pass a function as a property of the msg object and have it executed downstream in the flow. Since a function is an object in JavaScript this should work flawlessly. Well, i…

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## [Newbee question regarding "http request" with login parameters](https://discourse.nodered.org/t/newbee-question-regarding-http-request-with-login-parameters/425)

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**Author:** [@grawsom](https://discourse.nodered.org/u/grawsom)\
**Replies:** 7\
**Last updated:** [29 May 2018 13:44 UTC](https://discourse.nodered.org/t/newbee-question-regarding-http-request-with-login-parameters/425 "2018-05-29T13:44:26Z")

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Hi new to this world, and have just discovred Node-Red - wow… Have made some nodes where I use (http requests) to “monitor” a webpage - no problem there… and now I have a new project where I though that I could use same…

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## [Returning TWO msg.payloads?](https://discourse.nodered.org/t/returning-two-msg-payloads/456)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 3\
**Last updated:** [29 May 2018 07:04 UTC](https://discourse.nodered.org/t/returning-two-msg-payloads/456 "2018-05-29T07:04:41Z")

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New problem. (Of course) With new knowledge I am re-writing a lot of my flows to simplify things. Or so I hope. I have a “node” that detects if things are good or bad. If good, all is … good. If bad, it sends ONE…

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## [Detecting link closure - options?](https://discourse.nodered.org/t/detecting-link-closure-options/439)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 13\
**Last updated:** [28 May 2018 22:59 UTC](https://discourse.nodered.org/t/detecting-link-closure-options/439 "2018-05-28T22:59:10Z")

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Ok, not the best description. I know I have explored MQTT before and have got things working. Alas I am back with that and am (again) stuck. Well, I don’t know of a good way to do this thing. Back story: I have a RP…

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