# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=965

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

**Page:** 966

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## [Blink Map marker](https://discourse.nodered.org/t/blink-map-marker/736)

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**Author:** [@mshaz](https://discourse.nodered.org/u/mshaz)\
**Replies:** 1\
**Last updated:** [11 June 2018 13:03 UTC](https://discourse.nodered.org/t/blink-map-marker/736 "2018-06-11T13:03:49Z")

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\[map%20marker\] Hi i have these flows. Top will get input from I/O pin and i want to blink the marker when there’s trigger else it should be grey color. The bottom flow i would want the grey marker to be there when i …

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## [Help with understanding payload](https://discourse.nodered.org/t/help-with-understanding-payload/717)

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**Author:** [@NickB](https://discourse.nodered.org/u/NickB)\
**Replies:** 4\
**Last updated:** [11 June 2018 09:59 UTC](https://discourse.nodered.org/t/help-with-understanding-payload/717 "2018-06-11T09:59:38Z")

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Hi, I’m really struggling with understanding the 'msg.payload" with objects. I’m really looking for this since a while, but I really miss a basic link. I’m just going to tell what I trie to do: I’m playing with the h…

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## [How to use JS chart and mysql data in node-red?](https://discourse.nodered.org/t/how-to-use-js-chart-and-mysql-data-in-node-red/701)

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**Author:** [@imadouino](https://discourse.nodered.org/u/imadouino)\
**Replies:** 2\
**Last updated:** [11 June 2018 07:32 UTC](https://discourse.nodered.org/t/how-to-use-js-chart-and-mysql-data-in-node-red/701 "2018-06-11T07:32:20Z")

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hi. How i can to use JAVASCRIPT Chart in node-red with dynamic data !!!? (use variables in JS) Thank you for your help.

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## [Deployed flow not updating (node-red-contrib-redis ignoring close event after flow deploy)](https://discourse.nodered.org/t/deployed-flow-not-updating-node-red-contrib-redis-ignoring-close-event-after-flow-deploy/731)

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**Author:** [@adarsk](https://discourse.nodered.org/u/adarsk)\
**Replies:** 6\
**Last updated:** [11 June 2018 07:21 UTC](https://discourse.nodered.org/t/deployed-flow-not-updating-node-red-contrib-redis-ignoring-close-event-after-flow-deploy/731 "2018-06-11T07:21:57Z")

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Hi all, I created a flow that reads from a redis list using BLPOP. I configured it to read from localhost:6379. It came up with ETIMEOUT because I don’t have a server on the same machine. I then corrected the server add…

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## [Can't get Email flow to Work](https://discourse.nodered.org/t/cant-get-email-flow-to-work/728)

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**Author:** [@Bobfla](https://discourse.nodered.org/u/Bobfla)\
**Replies:** 12\
**Last updated:** [10 June 2018 22:12 UTC](https://discourse.nodered.org/t/cant-get-email-flow-to-work/728 "2018-06-10T22:12:19Z")

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I’v tried every thing I could keep getting this message: “YOU HAVE SOME UNUSED CONFIGURATION NODES” It says click for more info but nothing happens. Can run Email from chrome OK so system works. running RPI 3 with No…

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## [Dot inside query string not converted to underscore](https://discourse.nodered.org/t/dot-inside-query-string-not-converted-to-underscore/722)

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**Author:** [@hutje](https://discourse.nodered.org/u/hutje)\
**Replies:** 1\
**Last updated:** [9 June 2018 18:44 UTC](https://discourse.nodered.org/t/dot-inside-query-string-not-converted-to-underscore/722 "2018-06-09T18:44:34Z")

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When I get a HTTP Request with: https://www.website.nl/webhooks?hub.challenge=0000 This query string consists of hub.challenge. I need to respond with the value of hub.challenge. I can’t respond because the template-no…

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## [Methods of variable sharing compared](https://discourse.nodered.org/t/methods-of-variable-sharing-compared/708)

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**Author:** [@igrowing](https://discourse.nodered.org/u/igrowing)\
**Replies:** 8\
**Last updated:** [9 June 2018 13:16 UTC](https://discourse.nodered.org/t/methods-of-variable-sharing-compared/708 "2018-06-09T13:16:08Z")

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In https://nodered.org/docs/writing-functions.html#flow-context it’s shown how to read context/flow/global shared variables (1). var mv = flow.get('my\_var')||0; The || statement protects the failure in case the variabl…

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## [Can you cancel a trigger node?](https://discourse.nodered.org/t/can-you-cancel-a-trigger-node/712)

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**Author:** [@fahrvergnuugen](https://discourse.nodered.org/u/fahrvergnuugen)\
**Replies:** 5\
**Last updated:** [9 June 2018 14:44 UTC](https://discourse.nodered.org/t/can-you-cancel-a-trigger-node/712 "2018-06-09T14:44:08Z")

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I’m using a trigger node as a timer for my basement lights so that they automatically shut off after X minutes. I have three inputs which trigger the lights to turn on (two light switches and a motion detector). If any o…

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## [Sending a set of pulses to a relay by pressing a button on a web page](https://discourse.nodered.org/t/sending-a-set-of-pulses-to-a-relay-by-pressing-a-button-on-a-web-page/518)

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**Author:** [@Johans](https://discourse.nodered.org/u/Johans)\
**Replies:** 7\
**Last updated:** [9 June 2018 09:18 UTC](https://discourse.nodered.org/t/sending-a-set-of-pulses-to-a-relay-by-pressing-a-button-on-a-web-page/518 "2018-06-09T09:18:15Z")

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Hi, I’m new and as many of us newcomers still have to learn a lot. I’m in the process of modifying my jukebox AMI-H 200 selection in such a way that I can select a song via a webpage. So far I’ve managed all with a pyt…

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## [Duplicate config-nodes](https://discourse.nodered.org/t/duplicate-config-nodes/690)

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**Author:** [@tilleul](https://discourse.nodered.org/u/tilleul)\
**Replies:** 2\
**Last updated:** [9 June 2018 08:11 UTC](https://discourse.nodered.org/t/duplicate-config-nodes/690 "2018-06-09T08:11:23Z")

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It’s possible to copy/paste nodes including all their parameters but is there any way to achieve the same with config-nodes ?

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## [Setup ds18b20 temp sensor to webpage](https://discourse.nodered.org/t/setup-ds18b20-temp-sensor-to-webpage/676)

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**Author:** [@polskifacet](https://discourse.nodered.org/u/polskifacet)\
**Replies:** 8\
**Last updated:** [8 June 2018 21:16 UTC](https://discourse.nodered.org/t/setup-ds18b20-temp-sensor-to-webpage/676 "2018-06-08T21:16:18Z")

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Is there an easy way to show temperature from a ds18b20 sensor? Would eventually like to evolve into a general status page to check if things are on or off remotely, temperature, etc.

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## [Nodered Project desapear 2 times - Any help please?](https://discourse.nodered.org/t/nodered-project-desapear-2-times-any-help-please/706)

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**Author:** [@vfreire](https://discourse.nodered.org/u/vfreire)\
**Replies:** 0\
**Last updated:** [8 June 2018 20:06 UTC](https://discourse.nodered.org/t/nodered-project-desapear-2-times-any-help-please/706 "2018-06-08T20:06:26Z")

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Hi team, i am a new nodered user and i did a small orchestrator using IBM Watson assistant node + text to Speech in a project. I did a integration with a webpage and facebook. Everthing was going well when my project de…

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## [Libraries affect load time?](https://discourse.nodered.org/t/libraries-affect-load-time/531)

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**Author:** [@RobSenix](https://discourse.nodered.org/u/RobSenix)\
**Replies:** 4\
**Last updated:** [8 June 2018 14:22 UTC](https://discourse.nodered.org/t/libraries-affect-load-time/531 "2018-06-08T14:22:36Z")

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I am running Node-RED on an embedded computer with limited resources. I have developed a set of flows for my application. With all flows loaded into the editor, a browser refresh takes about 20-30 seconds to refresh an…

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## [Create Dashboard from node red receiving data from cloud through sensors](https://discourse.nodered.org/t/create-dashboard-from-node-red-receiving-data-from-cloud-through-sensors/333)

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**Author:** [@fredy76](https://discourse.nodered.org/u/fredy76)\
**Replies:** 1\
**Last updated:** [8 June 2018 10:10 UTC](https://discourse.nodered.org/t/create-dashboard-from-node-red-receiving-data-from-cloud-through-sensors/333 "2018-06-08T10:10:02Z")

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Hey I am looking for cloud to save the reading of temperature sensor to database following are the point I wanted to know about the possibility to read the sensor data with NODE Red using Pycom Store the readings in c…

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## [How to possible aes128 encrypt and decrypt?](https://discourse.nodered.org/t/how-to-possible-aes128-encrypt-and-decrypt/687)

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**Author:** [@variyaSandip](https://discourse.nodered.org/u/variyaSandip)\
**Replies:** 0\
**Last updated:** [8 June 2018 05:36 UTC](https://discourse.nodered.org/t/how-to-possible-aes128-encrypt-and-decrypt/687 "2018-06-08T05:36:15Z")

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Hello… How to possible to 128-aes ecb encrypt and decrypt data in node-red ? I have use node-red-contrib-crypto-js but not matching my c language 128-aes encrypt and decrypt data . I attached below screen \[1\]\[2\]\[3\] …

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## [Create new file](https://discourse.nodered.org/t/create-new-file/691)

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**Author:** [@ThanosMel](https://discourse.nodered.org/u/ThanosMel)\
**Replies:** 4\
**Last updated:** [8 June 2018 08:19 UTC](https://discourse.nodered.org/t/create-new-file/691 "2018-06-08T08:19:54Z")

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I want to create a new file i using the fs function. I get the following error “ReferenceError: fs is not defined” . I tried that but error persists https://flows.nodered.org/flow/cdf160c36f082dc2a20cd1183ac6cd7d.

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## [Connect flow with flow](https://discourse.nodered.org/t/connect-flow-with-flow/689)

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**Author:** [@ThanosMel](https://discourse.nodered.org/u/ThanosMel)\
**Replies:** 2\
**Last updated:** [8 June 2018 07:11 UTC](https://discourse.nodered.org/t/connect-flow-with-flow/689 "2018-06-08T07:11:09Z")

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Can i connect two different flows to each other like flow1-\>flow2.

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## [Debug-problem-with-press](https://discourse.nodered.org/t/debug-problem-with-press/636)

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**Author:** [@chrisious](https://discourse.nodered.org/u/chrisious)\
**Replies:** 10\
**Last updated:** [8 June 2018 00:28 UTC](https://discourse.nodered.org/t/debug-problem-with-press/636 "2018-06-08T00:28:35Z")

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hello I have a problem at debug button I press the debug button and the message doesn’t work .

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## [Visual recognition of a video \[Help\]](https://discourse.nodered.org/t/visual-recognition-of-a-video-help/673)

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**Author:** [@Sgilroy](https://discourse.nodered.org/u/Sgilroy)\
**Replies:** 1\
**Last updated:** [7 June 2018 18:08 UTC](https://discourse.nodered.org/t/visual-recognition-of-a-video-help/673 "2018-06-07T18:08:55Z")

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Hi, I’ve been working with node-red and Watson studio for about 2 weeks. Recently I’ve been trying to get Watson visual recognition to work with a live Youtube video (doesn’t have to be live you just need the embedded c…

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## [Dashboard nodes not in palette](https://discourse.nodered.org/t/dashboard-nodes-not-in-palette/666)

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**Author:** [@ORLINTech](https://discourse.nodered.org/u/ORLINTech)\
**Replies:** 5\
**Last updated:** [7 June 2018 14:18 UTC](https://discourse.nodered.org/t/dashboard-nodes-not-in-palette/666 "2018-06-07T14:18:55Z")

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Hi, Noob question: I am using Node-Red on a Raspberry Pi 3. I installed the Dashboard node (node-red-dashboard) but the nodes do not appear in the palette. It seemed to install OK with no errors and I have rebooted the P…

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## [Missing something in how to decode an output SOLVED I hope](https://discourse.nodered.org/t/missing-something-in-how-to-decode-an-output-solved-i-hope/661)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 2\
**Last updated:** [7 June 2018 11:42 UTC](https://discourse.nodered.org/t/missing-something-in-how-to-decode-an-output-solved-i-hope/661 "2018-06-07T11:42:56Z")

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Sorry folks, but I’m stuck. Recently installed “hostip” node. Nice. It seems to do what I need. I think. But the output: msg : Object object \_msgid: "b7761d7a.5ea9" topic: "" payload: array\[2\] 0: object address: "1…

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## [Install Windows](https://discourse.nodered.org/t/install-windows/660)

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**Author:** [@chrisious](https://discourse.nodered.org/u/chrisious)\
**Replies:** 1\
**Last updated:** [7 June 2018 11:02 UTC](https://discourse.nodered.org/t/install-windows/660 "2018-06-07T11:02:23Z")

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Hello i have a problem with windows installation when i write the npm install -g --unsafe-perm node-red it doesn’t work .

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## [Override Trigger-Button](https://discourse.nodered.org/t/override-trigger-button/642)

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**Author:** [@standro](https://discourse.nodered.org/u/standro)\
**Replies:** 2\
**Last updated:** [7 June 2018 07:15 UTC](https://discourse.nodered.org/t/override-trigger-button/642 "2018-06-07T07:15:09Z")

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Hi there, is there a possibility to trigger a trigger-button (e.g. “Inject”-node, …) from extern? Via http/mqtt/flow-variable/… I agree, everyone should reword his flow to trigger an event on specific time, instead of …

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## [Scan a specific directory for new files](https://discourse.nodered.org/t/scan-a-specific-directory-for-new-files/655)

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**Author:** [@ThanosMel](https://discourse.nodered.org/u/ThanosMel)\
**Replies:** 2\
**Last updated:** [7 June 2018 06:31 UTC](https://discourse.nodered.org/t/scan-a-specific-directory-for-new-files/655 "2018-06-07T06:31:58Z")

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Hi I need to keep scanning a specific -raspberry-directory for new xml files and store the xml files to a database. The raspberry pi is paired with a weight scale and each time that someone uses this scale a new xml fil…

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## [How to create a new UI from scratch](https://discourse.nodered.org/t/how-to-create-a-new-ui-from-scratch/478)

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**Author:** [@aoighost](https://discourse.nodered.org/u/aoighost)\
**Replies:** 5\
**Last updated:** [6 June 2018 16:08 UTC](https://discourse.nodered.org/t/how-to-create-a-new-ui-from-scratch/478 "2018-06-06T16:08:36Z")

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So I’m working on a project and need to create a new editor UI to create flows from scratch. @mike said he has done it in another thread and I’m wondering how to do it with existing APIs. Also I’m wondering if I can use …

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## [Problem with SOAP request authentication](https://discourse.nodered.org/t/problem-with-soap-request-authentication/644)

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**Author:** [@kiipeli](https://discourse.nodered.org/u/kiipeli)\
**Replies:** 0\
**Last updated:** [6 June 2018 14:41 UTC](https://discourse.nodered.org/t/problem-with-soap-request-authentication/644 "2018-06-06T14:41:21Z")

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Hello community! I am newbie and trying to learn to use Node-RED. I have been creating flows to retrieve data from several API´s and presenting them in the dashboard. Everything went well until I tried to create flow fo…

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## [When using mustache - / gets converted to &#x2F;](https://discourse.nodered.org/t/when-using-mustache-gets-converted-to-x2f/640)

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**Author:** [@grawsom](https://discourse.nodered.org/u/grawsom)\
**Replies:** 1\
**Last updated:** [6 June 2018 11:57 UTC](https://discourse.nodered.org/t/when-using-mustache-gets-converted-to-x2f/640 "2018-06-06T11:57:58Z")

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Why is / (Slash) changed to &#x2F; when using mustache ? I have made this test setup \[{"id":"c804c18d.255688","type":"inject","z":"fdf95545.a593b8","name":"","topic":"","payload":"TEST / TEST","payloadType":"str","repe…

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## [Convert some JSON](https://discourse.nodered.org/t/convert-some-json/634)

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**Author:** [@grawsom](https://discourse.nodered.org/u/grawsom)\
**Replies:** 2\
**Last updated:** [6 June 2018 10:11 UTC](https://discourse.nodered.org/t/convert-some-json/634 "2018-06-06T10:11:57Z")

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Are trying to change the output of a JSON code, but are stuck in how to do a loop for it. I can do this with value directly - “se my ex.” Change from \[{"Name":"name1","Number":1},{"Name":"name2","Number":2},{"Name":"n…

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## [Http Response not receiving data](https://discourse.nodered.org/t/http-response-not-receiving-data/521)

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**Author:** [@IanH](https://discourse.nodered.org/u/IanH)\
**Replies:** 21\
**Last updated:** [6 June 2018 07:45 UTC](https://discourse.nodered.org/t/http-response-not-receiving-data/521 "2018-06-06T07:45:45Z")

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Trying to get data out of a linux based system with web server, everything works except this which just puts up the requesting flag and nothing else happens. Node red 17 running on pi3b on a private network. \[{“id”:“12…

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## [Substract values from msg and using global variable](https://discourse.nodered.org/t/substract-values-from-msg-and-using-global-variable/623)

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**Author:** [@tzeeth](https://discourse.nodered.org/u/tzeeth)\
**Replies:** 4\
**Last updated:** [5 June 2018 22:29 UTC](https://discourse.nodered.org/t/substract-values-from-msg-and-using-global-variable/623 "2018-06-05T22:29:05Z")

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Hi Node community! I need some help in trying to do a subtraction operation between two messages that are msg.payload: Object like: {“contA”:20,“contB”:57} In one Flow, let’s call it Flow1 I receive one message like pr…

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