# Latest

**URL:** https://discourse.nodered.org/latest.md?page=1302

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

**Page:** 1303

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## [Group height does not resize](https://discourse.nodered.org/t/group-height-does-not-resize/9176)

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**Author:** [@realjax](https://discourse.nodered.org/u/realjax)\
**Replies:** 5\
**Last updated:** [20 March 2019 08:28 UTC](https://discourse.nodered.org/t/group-height-does-not-resize/9176 "2019-03-20T08:28:30Z")

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Hi, I have a group in which the content may vary in size dynamically. However I'v found that a group's height does not change dynamically as well and I end up with scrollbars. What can I do to prevent this from happenin…

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## [Authentication for api's](https://discourse.nodered.org/t/authentication-for-apis/9216)

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**Author:** [@akhilendharreddy](https://discourse.nodered.org/u/akhilendharreddy)\
**Replies:** 2\
**Last updated:** [20 March 2019 07:57 UTC](https://discourse.nodered.org/t/authentication-for-apis/9216 "2019-03-20T07:57:58Z")

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Hi, I am trying to expose some endpoints (api) for this I want to add authentication, I can able to add bais auth by enabling httpNodeAuth in the settings.js file but I want to pass authorization(access\_token) in the hea…

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## [Custom function node with auto filled code](https://discourse.nodered.org/t/custom-function-node-with-auto-filled-code/9119)

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**Author:** [@mvidhya86](https://discourse.nodered.org/u/mvidhya86)\
**Replies:** 3\
**Last updated:** [20 March 2019 04:13 UTC](https://discourse.nodered.org/t/custom-function-node-with-auto-filled-code/9119 "2019-03-20T04:13:35Z")

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Can i create a custom function node with auto filled code in it ? How do i achieve this? I would like to drag-drop this custom node, and when i double click, the code(which is pre-configured or pre-defined) has to appea…

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## [Trigger a flow from external call (QUESTION)](https://discourse.nodered.org/t/trigger-a-flow-from-external-call-question/9128)

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**Author:** [@defremont](https://discourse.nodered.org/u/defremont)\
**Replies:** 7\
**Last updated:** [20 March 2019 00:23 UTC](https://discourse.nodered.org/t/trigger-a-flow-from-external-call-question/9128 "2019-03-20T00:23:23Z")

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Hello everyone, i'm new on node-red and trying to integrate this with a Hyperledger Client (that is baiscally Angular 4) and i need to send an email when the user send a transaction on hyperledger. In the docs of Hyperl…

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## [Change height of Group](https://discourse.nodered.org/t/change-height-of-group/9151)

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**Author:** [@hebergeweb](https://discourse.nodered.org/u/hebergeweb)\
**Replies:** 3\
**Last updated:** [20 March 2019 00:12 UTC](https://discourse.nodered.org/t/change-height-of-group/9151 "2019-03-20T00:12:55Z")

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Hi, How to change the height of group title ?

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## [Cookbook - Simple GET request](https://discourse.nodered.org/t/cookbook-simple-get-request/9184)

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**Author:** [@Andrei](https://discourse.nodered.org/u/Andrei)\
**Replies:** 2\
**Last updated:** [19 March 2019 17:31 UTC](https://discourse.nodered.org/t/cookbook-simple-get-request/9184 "2019-03-19T17:31:10Z")

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A couple of questions about this cookbook recipe: 1- The flow does not match the picture. As a matter of fact, the flow has a bad CSS selector. As far as I can remember this was corrected at some point. I am not sure ho…

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## [Security, add more then one user](https://discourse.nodered.org/t/security-add-more-then-one-user/9141)

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**Author:** [@pvklink](https://discourse.nodered.org/u/pvklink)\
**Replies:** 6\
**Last updated:** [19 March 2019 17:14 UTC](https://discourse.nodered.org/t/security-add-more-then-one-user/9141 "2019-03-19T17:14:38Z")

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Hi like to add more then one user to use the dashboard. So i edit the setting.js. It seems that only the last account/user is working, can there be only one user ? I want to have one user that i use to edit the dashbo…

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## [Read data from JSON array](https://discourse.nodered.org/t/read-data-from-json-array/1938)

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**Author:** [@Ahd](https://discourse.nodered.org/u/Ahd)\
**Replies:** 42\
**Last updated:** [19 March 2019 10:36 UTC](https://discourse.nodered.org/t/read-data-from-json-array/1938 "2019-03-19T10:36:33Z")

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I have function node to read data from JSON file, I want read-only last value in the array. I have written the following code in function node but shown error " "TypeError: Cannot read property 'length' of undefined"\`\` f…

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## [Node red how to change the nodered dashboard layout fonts](https://discourse.nodered.org/t/node-red-how-to-change-the-nodered-dashboard-layout-fonts/9178)

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**Author:** [@VIKRAMAS](https://discourse.nodered.org/u/VIKRAMAS)\
**Replies:** 1\
**Last updated:** [19 March 2019 14:05 UTC](https://discourse.nodered.org/t/node-red-how-to-change-the-nodered-dashboard-layout-fonts/9178 "2019-03-19T14:05:14Z")

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In nodered I have used the theme-tomorrow which I have got in node red forum. But in nodered flow editor having dashboard layout font color I have to change. In the below snap I have shared it has the property --nr-db-d…

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## [PID controlling in general and a specific case](https://discourse.nodered.org/t/pid-controlling-in-general-and-a-specific-case/9169)

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**Author:** [@bohtho](https://discourse.nodered.org/u/bohtho)\
**Replies:** 12\
**Last updated:** [19 March 2019 13:41 UTC](https://discourse.nodered.org/t/pid-controlling-in-general-and-a-specific-case/9169 "2019-03-19T13:41:37Z")

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I hope this is the right category. This isnt entirely Node-RED specific but I cant think of any other forum with as many smart people. I'm new to PID control and would like to spar about a conondrum. I have particularl…

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## [Dowgrading Node.js on raspberry](https://discourse.nodered.org/t/dowgrading-node-js-on-raspberry/8945)

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**Author:** [@RobBekke](https://discourse.nodered.org/u/RobBekke)\
**Replies:** 7\
**Last updated:** [19 March 2019 12:20 UTC](https://discourse.nodered.org/t/dowgrading-node-js-on-raspberry/8945 "2019-03-19T12:20:09Z")

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Hi all, I use NR 0.20 on a Raspberry pi. I would like to use the Noble Node to be able to read the Ruuvitag via BLE. According to the makers, there is an issue with the NodeJS 10 version. Is there a possibility to downg…

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## [Node-RED 0.20.0 Released](https://discourse.nodered.org/t/node-red-0-20-0-released/8888)

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**Author:** [@knolleary](https://discourse.nodered.org/u/knolleary)\
**Replies:** 64\
**Last updated:** [19 March 2019 11:21 UTC](https://discourse.nodered.org/t/node-red-0-20-0-released/8888 "2019-03-19T11:21:34Z")

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After a few beta releases, Node-RED 0.20.0 has now been released for general use. Checkout the release blog post, including video, to find out what's in it - https://nodered.org/blog/2019/03/12/version-0-20-released

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## [Connecting to MQTT](https://discourse.nodered.org/t/connecting-to-mqtt/9172)

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**Author:** [@Madhumati](https://discourse.nodered.org/u/Madhumati)\
**Replies:** 2\
**Last updated:** [19 March 2019 09:37 UTC](https://discourse.nodered.org/t/connecting-to-mqtt/9172 "2019-03-19T09:37:58Z")

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Hello I am trying to connect my hardware Rasppbeery PI based to MQTT client, but not connecting . I am not able to subscribe/publish to the topic ..can you please guide? Data received out & sent/published to …

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## [Multiple lines on a chart](https://discourse.nodered.org/t/multiple-lines-on-a-chart/9167)

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**Author:** [@alex2](https://discourse.nodered.org/u/alex2)\
**Replies:** 3\
**Last updated:** [19 March 2019 09:09 UTC](https://discourse.nodered.org/t/multiple-lines-on-a-chart/9167 "2019-03-19T09:09:16Z")

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I need some help, i have 2 flows with different output every 5 min, and want this 2 numbers in one chart on the dashboard. Alex

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## [Writing using file node UTF-8, encoding becomes iso-8859](https://discourse.nodered.org/t/writing-using-file-node-utf-8-encoding-becomes-iso-8859/9114)

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**Author:** [@mbot](https://discourse.nodered.org/u/mbot)\
**Replies:** 3\
**Last updated:** [19 March 2019 08:44 UTC](https://discourse.nodered.org/t/writing-using-file-node-utf-8-encoding-becomes-iso-8859/9114 "2019-03-19T08:44:03Z")

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I used the file node to write an XML file to disk. The XML has UTF-8 special characters like ä, however when written to file it is written as iso-8859, as shown on the linux command line : file original\_alert.xml origi…

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## [Same event use with Node-Red](https://discourse.nodered.org/t/same-event-use-with-node-red/8952)

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**Author:** [@florent](https://discourse.nodered.org/u/florent)\
**Replies:** 8\
**Last updated:** [19 March 2019 02:51 UTC](https://discourse.nodered.org/t/same-event-use-with-node-red/8952 "2019-03-19T02:51:30Z")

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Hi, I have two node, one for detector of open door and another for detector of water. The probleme is that I use the same changment event. Detector of open/close door And detector of water And when i use det…

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## [Subflows broken with 0.20.0](https://discourse.nodered.org/t/subflows-broken-with-0-20-0/9143)

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**Author:** [@caralmar](https://discourse.nodered.org/u/caralmar)\
**Replies:** 8\
**Last updated:** [18 March 2019 21:15 UTC](https://discourse.nodered.org/t/subflows-broken-with-0-20-0/9143 "2019-03-18T21:15:45Z")

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Hi, I have tested this with a simple "hello world" function. The datamapper is a hello world for now: the function "hello": msg.payload = "hello world"; return msg; When I hit the inject node, I see nothing in t…

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## [Inject and MQTT input topics - using variables](https://discourse.nodered.org/t/inject-and-mqtt-input-topics-using-variables/9134)

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**Author:** [@scargill](https://discourse.nodered.org/u/scargill)\
**Replies:** 10\
**Last updated:** [18 March 2019 20:36 UTC](https://discourse.nodered.org/t/inject-and-mqtt-input-topics-using-variables/9134 "2019-03-18T20:36:58Z")

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This is most likely a stupid question, but I have a number of devices, identical in all but name which receive input from injects and from MQTT input. Is it possible to use, say, flow variables for topics in these two, r…

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## [Handles at top and bottom](https://discourse.nodered.org/t/handles-at-top-and-bottom/615)

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**Author:** [@michaelblight](https://discourse.nodered.org/u/michaelblight)\
**Replies:** 40\
**Last updated:** [18 March 2019 20:11 UTC](https://discourse.nodered.org/t/handles-at-top-and-bottom/615 "2019-03-18T20:11:57Z")

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I’m working on a laptop without an external monitor and fast running out of horizontal space. Wrapping around to a new ‘line’ detracts from the beautiful layout. It would be great to be able to alternatively link two nod…

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## [MQTT connection status](https://discourse.nodered.org/t/mqtt-connection-status/9139)

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**Author:** [@domcsidd](https://discourse.nodered.org/u/domcsidd)\
**Replies:** 7\
**Last updated:** [18 March 2019 18:02 UTC](https://discourse.nodered.org/t/mqtt-connection-status/9139 "2019-03-18T18:02:16Z")

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Hi everyone! I have some problem with my solution. I have an esp8266 witch communicate with my node-red server. It sends a sensor's value and publish an "ALIVE" text if callback happens(if a msg arrive in a specified …

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## [0.18.4 Projects need "git" and "ssh-keygen", OK. how?](https://discourse.nodered.org/t/0-18-4-projects-need-git-and-ssh-keygen-ok-how/160)

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**Author:** [@tree-frog](https://discourse.nodered.org/u/tree-frog)\
**Replies:** 6\
**Last updated:** [18 March 2019 16:55 UTC](https://discourse.nodered.org/t/0-18-4-projects-need-git-and-ssh-keygen-ok-how/160 "2019-03-18T16:55:48Z")

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I’m trying to use Projects. “The feature relies on having the git and ssh-keygen command line tools available. Node-RED will check for them on start-up and let you know if they are missing.” Started node-RED and \[warn…

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## [Post or get check](https://discourse.nodered.org/t/post-or-get-check/9088)

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**Author:** [@pvklink](https://discourse.nodered.org/u/pvklink)\
**Replies:** 11\
**Last updated:** [18 March 2019 16:22 UTC](https://discourse.nodered.org/t/post-or-get-check/9088 "2019-03-18T16:22:52Z")

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is there a way to check if a call is a POST or a GET ?

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## [Nodered 0.20.2 crashes - TypeError: Converting circular structure to JSON](https://discourse.nodered.org/t/nodered-0-20-2-crashes-typeerror-converting-circular-structure-to-json/9127)

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**Author:** [@snoekieboe](https://discourse.nodered.org/u/snoekieboe)\
**Replies:** 2\
**Last updated:** [18 March 2019 15:02 UTC](https://discourse.nodered.org/t/nodered-0-20-2-crashes-typeerror-converting-circular-structure-to-json/9127 "2019-03-18T15:02:17Z")

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Hi, I upgraded my Node-Red install to version 0.20.2 and now it's constantly restarting or crashing with the following error: 18 Mar 14:49:50 - TypeError: Converting circular structure to JSON at JSON.stringify (\<a…

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## [How to handle multiple http post request at once](https://discourse.nodered.org/t/how-to-handle-multiple-http-post-request-at-once/1248)

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**Author:** [@sergiogama](https://discourse.nodered.org/u/sergiogama)\
**Replies:** 12\
**Last updated:** [18 March 2019 14:34 UTC](https://discourse.nodered.org/t/how-to-handle-multiple-http-post-request-at-once/1248 "2019-03-18T14:34:17Z")

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Hi all, I have a flow which has a http end point (Post), that process something in the middle and send response thru http response. The problem is that the client system make many calls in one shot (node.js, using Promi…

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## [Menu-dashboard location to url page](https://discourse.nodered.org/t/menu-dashboard-location-to-url-page/9117)

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**Author:** [@hebergeweb](https://discourse.nodered.org/u/hebergeweb)\
**Replies:** 2\
**Last updated:** [18 March 2019 13:51 UTC](https://discourse.nodered.org/t/menu-dashboard-location-to-url-page/9117 "2019-03-18T13:51:55Z")

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Hi, how to add a button in the menu-bar to go to a web page example "http://www.example.com" or even the button that is in an orange circle to redirect to web page.

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## [Geograpfic map of premisses](https://discourse.nodered.org/t/geograpfic-map-of-premisses/9123)

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**Author:** [@jacko91](https://discourse.nodered.org/u/jacko91)\
**Replies:** 1\
**Last updated:** [18 March 2019 13:37 UTC](https://discourse.nodered.org/t/geograpfic-map-of-premisses/9123 "2019-03-18T13:37:59Z")

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Hey, I have several esp32 in my garden, which use mqtt to publish to a raspberry pi. All done using node red. I want to use a map of my garden, where i can visualize my sensors. Basically a google maps map, where the s…

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## [How to read Byte Array from Xbee device](https://discourse.nodered.org/t/how-to-read-byte-array-from-xbee-device/9121)

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**Author:** [@fredy76](https://discourse.nodered.org/u/fredy76)\
**Replies:** 0\
**Last updated:** [18 March 2019 12:40 UTC](https://discourse.nodered.org/t/how-to-read-byte-array-from-xbee-device/9121 "2019-03-18T12:40:28Z")

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Hi, I am trying to read the byte array from the Xbee device but while using serial node or Wireless Device or Wireless gateway Node which is installed from ncd-red-wireless. While connecting these nodes with the debug n…

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## [Node-Red prometheus plugins/node](https://discourse.nodered.org/t/node-red-prometheus-plugins-node/8960)

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**Author:** [@Albin](https://discourse.nodered.org/u/Albin)\
**Replies:** 3\
**Last updated:** [18 March 2019 11:02 UTC](https://discourse.nodered.org/t/node-red-prometheus-plugins-node/8960 "2019-03-18T11:02:15Z")

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Hi All , New to Node-Red. Can anyone please advise if there is any plugin/nodes available so that we could connect to Prometheus database. Regards, Albin

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## [Programmatic Group Collapse?](https://discourse.nodered.org/t/programmatic-group-collapse/8643)

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**Author:** [@tcontrada](https://discourse.nodered.org/u/tcontrada)\
**Replies:** 2\
**Last updated:** [18 March 2019 10:13 UTC](https://discourse.nodered.org/t/programmatic-group-collapse/8643 "2019-03-18T10:13:58Z")

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Is it possible to programmatically expand or collapse a Group section? Thanks...

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## [Switch a flow on or off](https://discourse.nodered.org/t/switch-a-flow-on-or-off/9106)

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**Author:** [@RickW](https://discourse.nodered.org/u/RickW)\
**Replies:** 5\
**Last updated:** [18 March 2019 09:20 UTC](https://discourse.nodered.org/t/switch-a-flow-on-or-off/9106 "2019-03-18T09:20:59Z")

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I would like to use a dashboard switch to allow or stop a flow of time triggered analog data from a sensor input to a save to file node. It seems like a fairly simple task to request but I can't picture how I can do it…

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