# Latest

**URL:** https://discourse.nodered.org/latest.md?page=1393

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

**Page:** 1394

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## [Need Help with creating Dashboard from Sense Hat data on raspi 3](https://discourse.nodered.org/t/need-help-with-creating-dashboard-from-sense-hat-data-on-raspi-3/346)

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**Author:** [@george](https://discourse.nodered.org/u/george)\
**Replies:** 3\
**Last updated:** [24 May 2018 14:37 UTC](https://discourse.nodered.org/t/need-help-with-creating-dashboard-from-sense-hat-data-on-raspi-3/346 "2018-05-24T14:37:55Z")

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I watched this tutorial right here : https://www.youtube.com/watch?v=UKv4\_jvPtr4&t=137s and managed to pull it out.I am interested to do something similar to this however not with temperature or humidity etc. but with th…

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## [Windows/Raspberry LAN name issues following recent Win update](https://discourse.nodered.org/t/windows-raspberry-lan-name-issues-following-recent-win-update/313)

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**Author:** [@MattMiller](https://discourse.nodered.org/u/MattMiller)\
**Replies:** 1\
**Last updated:** [24 May 2018 14:08 UTC](https://discourse.nodered.org/t/windows-raspberry-lan-name-issues-following-recent-win-update/313 "2018-05-24T14:08:25Z")

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JFI - if you encounter issues in deploying flows to a Pi from a Windows 10 machine - this thread in the Pi forums may (or might be something else or course ) be relevant https://www.raspberrypi.org/forums/viewtopic.php…

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## [Max call stack exceed error on smooth nodes](https://discourse.nodered.org/t/max-call-stack-exceed-error-on-smooth-nodes/341)

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**Author:** [@davidcgu](https://discourse.nodered.org/u/davidcgu)\
**Replies:** 4\
**Last updated:** [24 May 2018 10:51 UTC](https://discourse.nodered.org/t/max-call-stack-exceed-error-on-smooth-nodes/341 "2018-05-24T10:51:51Z")

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Good evening All my smooth node functions are giving me on debug error as follows: “RangeError: Maximum call stack size exceeded” 23/5/2018 22:13:56node: cc331629.f54448 msg : error “RangeError: Maximum call stack …

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## [Beginner help with capturing State changes](https://discourse.nodered.org/t/beginner-help-with-capturing-state-changes/339)

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**Author:** [@jbautomaion](https://discourse.nodered.org/u/jbautomaion)\
**Replies:** 1\
**Last updated:** [23 May 2018 20:21 UTC](https://discourse.nodered.org/t/beginner-help-with-capturing-state-changes/339 "2018-05-23T20:21:01Z")

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I am just starting to pick up NODE-RED so bear with me. I do have a coding background so I may be over analysing this a little bit :slight\_smile: I am using the Home Assistant module to trigger off some flows. I know …

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## [Feedback wanted: sidebar tab redesign](https://discourse.nodered.org/t/feedback-wanted-sidebar-tab-redesign/318)

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**Author:** [@knolleary](https://discourse.nodered.org/u/knolleary)\
**Replies:** 9\
**Last updated:** [23 May 2018 18:54 UTC](https://discourse.nodered.org/t/feedback-wanted-sidebar-tab-redesign/318 "2018-05-23T18:54:08Z")

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Hi, Since we added the history section to the sidebar, the tabs can get a bit squashed. There are now three in the default set, and everyone with dashboard installed has four. There's also the config nodes sidebar tab …

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## [Serialport access in Node-Red of IBM](https://discourse.nodered.org/t/serialport-access-in-node-red-of-ibm/335)

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**Author:** [@gustavosolano](https://discourse.nodered.org/u/gustavosolano)\
**Replies:** 1\
**Last updated:** [23 May 2018 16:40 UTC](https://discourse.nodered.org/t/serialport-access-in-node-red-of-ibm/335 "2018-05-23T16:40:51Z")

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Hello, is it possible to access the raspberry serial ports with the NODE-RD in IBM? \[2018-05-23-112244\_1824x984\_scrot\]

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## [Maximum Load Level](https://discourse.nodered.org/t/maximum-load-level/310)

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**Author:** [@Ksedline](https://discourse.nodered.org/u/Ksedline)\
**Replies:** 4\
**Last updated:** [22 May 2018 21:49 UTC](https://discourse.nodered.org/t/maximum-load-level/310 "2018-05-22T21:49:19Z")

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Hello! I need to know answers on these questions. The questions is about maximum load level of Node-Red. Will it works correctly with 10 requests per second? Same question for 20 000 requests per hour? We using this …

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## [Trouble w/HTTP request node (ENOTFOUND)](https://discourse.nodered.org/t/trouble-w-http-request-node-enotfound/302)

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**Author:** [@Joey.Bail](https://discourse.nodered.org/u/Joey.Bail)\
**Replies:** 6\
**Last updated:** [22 May 2018 18:32 UTC](https://discourse.nodered.org/t/trouble-w-http-request-node-enotfound/302 "2018-05-22T18:32:28Z")

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I am running into an error with the HTTP Request node in Node-RED. I am following this tutorial step-by-step, but I am not receiving expected results. Instead, I am seeing an ENOTFOUND error when the flow gets to the HTT…

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## [Where can i find the homeassistant server configuration](https://discourse.nodered.org/t/where-can-i-find-the-homeassistant-server-configuration/305)

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**Author:** [@jbautomaion](https://discourse.nodered.org/u/jbautomaion)\
**Replies:** 2\
**Last updated:** [22 May 2018 16:22 UTC](https://discourse.nodered.org/t/where-can-i-find-the-homeassistant-server-configuration/305 "2018-05-22T16:22:46Z")

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After importing a couple flows that I found in forums to look at I now have 2 failed Home Assistant connections to IP addresses that do not exist flooding my debug window on every flow. I have verified that there is onl…

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## [Read data from http link](https://discourse.nodered.org/t/read-data-from-http-link/308)

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**Author:** [@mahbh](https://discourse.nodered.org/u/mahbh)\
**Replies:** 3\
**Last updated:** [22 May 2018 15:25 UTC](https://discourse.nodered.org/t/read-data-from-http-link/308 "2018-05-22T15:25:48Z")

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i have this link that contains data http://blynk-cloud.com/d6f128e07xxxxxxxxxxxxxxx3/get/V5 like this: \[“24.000”\] so i want to display this data in gauge and chart on node-red how can i do this ??

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## [Exporting array to a local file](https://discourse.nodered.org/t/exporting-array-to-a-local-file/278)

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**Author:** [@Joey.Bail](https://discourse.nodered.org/u/Joey.Bail)\
**Replies:** 12\
**Last updated:** [22 May 2018 14:08 UTC](https://discourse.nodered.org/t/exporting-array-to-a-local-file/278 "2018-05-22T14:08:51Z")

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I am having extreme difficulty exporting information from Node-RED to a file on my local drive. To give some context, I am reading information from an external sensor into Node-RED, and I am trying to export that informa…

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## [Exporting nodered to home assistant yaml](https://discourse.nodered.org/t/exporting-nodered-to-home-assistant-yaml/270)

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**Author:** [@david\_c](https://discourse.nodered.org/u/david_c)\
**Replies:** 8\
**Last updated:** [22 May 2018 13:52 UTC](https://discourse.nodered.org/t/exporting-nodered-to-home-assistant-yaml/270 "2018-05-22T13:52:10Z")

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Hi. new to nodered so be patient please. I have it installed and running on a Rpi with Hasio. When I drag the nodes into the working area and deploy, how do I get the code into Hasio with the correct formatting, spaces…

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## [Node-RED as Replacement Rule Engine for OpenHab](https://discourse.nodered.org/t/node-red-as-replacement-rule-engine-for-openhab/298)

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**Author:** [@rgerrans](https://discourse.nodered.org/u/rgerrans)\
**Replies:** 0\
**Last updated:** [22 May 2018 12:53 UTC](https://discourse.nodered.org/t/node-red-as-replacement-rule-engine-for-openhab/298 "2018-05-22T12:53:20Z")

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Original thread is posted here - https://community.openhab.org/t/node-red-as-alternative-rule-engine/29509 “Node-RED is a visual wiring tool for the Internet of Things.” From an Openhab perspective it a visual tool tha…

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## [Checking for stable message before forwarding](https://discourse.nodered.org/t/checking-for-stable-message-before-forwarding/271)

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**Author:** [@dilby](https://discourse.nodered.org/u/dilby)\
**Replies:** 2\
**Last updated:** [22 May 2018 09:07 UTC](https://discourse.nodered.org/t/checking-for-stable-message-before-forwarding/271 "2018-05-22T09:07:05Z")

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Hi, I have a node red sensor input that I want to check is stable for 1min before forwarding on. I can’t find a simple way to do this. My use-case is that I have a location beacon that shows I’m either home or not home…

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## [Sharing information between auth callback and nodered node](https://discourse.nodered.org/t/sharing-information-between-auth-callback-and-nodered-node/292)

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**Author:** [@angelo](https://discourse.nodered.org/u/angelo)\
**Replies:** 0\
**Last updated:** [22 May 2018 08:41 UTC](https://discourse.nodered.org/t/sharing-information-between-auth-callback-and-nodered-node/292 "2018-05-22T08:41:52Z")

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Sorry for cross-posting :confused: I hope this is the right session I’ve this need: I’m using passport + openid-connect to enable access to the nodered. Everything works smooth and i’ve been able also to wrote a callbac…

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## [Deduct old payload from new payload](https://discourse.nodered.org/t/deduct-old-payload-from-new-payload/259)

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**Author:** [@Marcusrs](https://discourse.nodered.org/u/Marcusrs)\
**Replies:** 4\
**Last updated:** [21 May 2018 22:00 UTC](https://discourse.nodered.org/t/deduct-old-payload-from-new-payload/259 "2018-05-21T22:00:40Z")

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Hi, I am currently getting a payload that is perfectly fine to further use, but I would also like to deduct the previous payload Ideally something like payload=new.payload-old.payload Is this easily done in a functio…

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## [Upper limiit of nodes in a tab, inquiry](https://discourse.nodered.org/t/upper-limiit-of-nodes-in-a-tab-inquiry/266)

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**Author:** [@BlinkScooby](https://discourse.nodered.org/u/BlinkScooby)\
**Replies:** 3\
**Last updated:** [21 May 2018 11:57 UTC](https://discourse.nodered.org/t/upper-limiit-of-nodes-in-a-tab-inquiry/266 "2018-05-21T11:57:35Z")

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Hey guys. I was just wondering what would be the general upper limit to max nodes in one tab? Reason I ask is I was reading some best practices and it mentioned to keep them as small as possible. I do understand that b…

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## [Documentation: testing a node module locally](https://discourse.nodered.org/t/documentation-testing-a-node-module-locally/262)

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**Author:** [@drmibell](https://discourse.nodered.org/u/drmibell)\
**Replies:** 3\
**Last updated:** [21 May 2018 10:00 UTC](https://discourse.nodered.org/t/documentation-testing-a-node-module-locally/262 "2018-05-21T10:00:09Z")

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I have found two different recipes for this in the NR documentation, one at \[https://nodered.org/docs/creating-nodes/packaging\] and the other at \[https://nodered.org/docs/creating-nodes/first-node\]. I have had succes…

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## [Best Practices questions for dashboard and storing data](https://discourse.nodered.org/t/best-practices-questions-for-dashboard-and-storing-data/148)

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**Author:** [@BlinkScooby](https://discourse.nodered.org/u/BlinkScooby)\
**Replies:** 6\
**Last updated:** [21 May 2018 06:42 UTC](https://discourse.nodered.org/t/best-practices-questions-for-dashboard-and-storing-data/148 "2018-05-21T06:42:50Z")

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Hey guys. I had some quick questions about the dashboard. So in a previous topic that i implemented showing and hiding different groups of data. This has worked great. However has caused a slow down of the interface to w…

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## [Wildcard subscription for websockets?](https://discourse.nodered.org/t/wildcard-subscription-for-websockets/225)

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**Author:** [@Stwissel](https://discourse.nodered.org/u/Stwissel)\
**Replies:** 5\
**Last updated:** [21 May 2018 00:33 UTC](https://discourse.nodered.org/t/wildcard-subscription-for-websockets/225 "2018-05-21T00:33:56Z")

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Is it possible to configure a websocket as /wsendpoint/\* to accept connection requests from /wsendpoint/john, /wsendpoint/jane etc? Purpose would be to serve arbitrary subscribers (e.g. each user would use an own sub ch…

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## [Status Text for many possible outcomes in one place](https://discourse.nodered.org/t/status-text-for-many-possible-outcomes-in-one-place/223)

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**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 7\
**Last updated:** [20 May 2018 21:49 UTC](https://discourse.nodered.org/t/status-text-for-many-possible-outcomes-in-one-place/223 "2018-05-20T21:49:52Z")

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Guys, I have created a Tab with a seperate group - i want this group to display status information from a connected microcontroller (Arduino). I have the Arduino sending in MQTT streams fine. This particular stream is …

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## [Add a Nodes Category as a place to discuss specific nodes](https://discourse.nodered.org/t/add-a-nodes-category-as-a-place-to-discuss-specific-nodes/261)

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**Author:** [@rgerrans](https://discourse.nodered.org/u/rgerrans)\
**Replies:** 1\
**Last updated:** [20 May 2018 21:20 UTC](https://discourse.nodered.org/t/add-a-nodes-category-as-a-place-to-discuss-specific-nodes/261 "2018-05-20T21:20:21Z")

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It would be nice to have a place to discuss specific 3rd party nodes. My suggestion would be 1) to add a Nodes category for it, and 2) turn on tagging so we can tag topic’s related to specific nodes to make them easy fo…

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## [Docker Based Node-red User default password](https://discourse.nodered.org/t/docker-based-node-red-user-default-password/237)

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**Author:** [@Eyad](https://discourse.nodered.org/u/Eyad)\
**Replies:** 2\
**Last updated:** [20 May 2018 14:42 UTC](https://discourse.nodered.org/t/docker-based-node-red-user-default-password/237 "2018-05-20T14:42:59Z")

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Hello I am using docker based Node-red container in raspberry Pi "nodered/node-red-docker:rpi"and I would like to apply the login authentication for both the UI and the dashboard but when I am trying to edit the setting…

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## [Format data lost after system upgrade](https://discourse.nodered.org/t/format-data-lost-after-system-upgrade/256)

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**Author:** [@davidcgu](https://discourse.nodered.org/u/davidcgu)\
**Replies:** 3\
**Last updated:** [20 May 2018 03:35 UTC](https://discourse.nodered.org/t/format-data-lost-after-system-upgrade/256 "2018-05-20T03:35:52Z")

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Good Morning A few days ago I have upgraded my full system and seems the data output format from a graph have changed what makes that my template is not working anymore. I want to capture from the output of the graph t…

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## [Audio Context Changes](https://discourse.nodered.org/t/audio-context-changes/250)

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**Author:** [@chughts](https://discourse.nodered.org/u/chughts)\
**Replies:** 2\
**Last updated:** [19 May 2018 15:47 UTC](https://discourse.nodered.org/t/audio-context-changes/250 "2018-05-19T15:47:10Z")

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Not too sure where to ask, but I will start here. As a result of autoplay policy changes on Chrome, any node that makes use of an AudioContext needs to perform a .resume if the state is not 'running' . I am making the ch…

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## [To install Node-Red globally or not to](https://discourse.nodered.org/t/to-install-node-red-globally-or-not-to/216)

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**Author:** [@tilleul](https://discourse.nodered.org/u/tilleul)\
**Replies:** 3\
**Last updated:** [18 May 2018 20:49 UTC](https://discourse.nodered.org/t/to-install-node-red-globally-or-not-to/216 "2018-05-18T20:49:56Z")

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I’ve never installed NR “globally”. From the start I’ve been using the instructions here https://nodered.org/docs/embedding to embed NR in another app (which is in fact strictly node-red). One of the main advantages (i…

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## [HTTP\_POST to arduino webserver](https://discourse.nodered.org/t/http-post-to-arduino-webserver/242)

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**Author:** [@Buenovito](https://discourse.nodered.org/u/Buenovito)\
**Replies:** 1\
**Last updated:** [18 May 2018 20:45 UTC](https://discourse.nodered.org/t/http-post-to-arduino-webserver/242 "2018-05-18T20:45:38Z")

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hallo, I’am quite new in node red , and I want to know if there are any example of how to use HTTP post ? The idea is I wanted to post for example “HELLO” to a web-server made from an ESP8266 arduino.

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## [Making percentage calculations with two different msg.payload](https://discourse.nodered.org/t/making-percentage-calculations-with-two-different-msg-payload/215)

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**Author:** [@Tamar85](https://discourse.nodered.org/u/Tamar85)\
**Replies:** 7\
**Last updated:** [18 May 2018 14:24 UTC](https://discourse.nodered.org/t/making-percentage-calculations-with-two-different-msg-payload/215 "2018-05-18T14:24:53Z")

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Hi I have problem with my function block. First MQTT is sending me incoming water volume second MQTT is sending outgoing water volume and i wanna calculate whats the difference. My problem is that function block gives m…

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## [Value of text File as config](https://discourse.nodered.org/t/value-of-text-file-as-config/232)

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**Author:** [@rskhatri](https://discourse.nodered.org/u/rskhatri)\
**Replies:** 0\
**Last updated:** [18 May 2018 12:30 UTC](https://discourse.nodered.org/t/value-of-text-file-as-config/232 "2018-05-18T12:30:27Z")

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Hi, I have set the path of directory in setting.js and I want to read file and set that value of file as one of input configuration. How can I do it in html file? Best Regards, Rohit Khatri

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## [DashBoard not shows graphic](https://discourse.nodered.org/t/dashboard-not-shows-graphic/210)

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**Author:** [@nmarques](https://discourse.nodered.org/u/nmarques)\
**Replies:** 13\
**Last updated:** [18 May 2018 10:43 UTC](https://discourse.nodered.org/t/dashboard-not-shows-graphic/210 "2018-05-18T10:43:47Z")

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I am a new user and need help. I created a flow that has a graphic but when I’m on the preview page it appears blank showing nothing. Not even when the layout is muted is there any difference. Thank you for your suppor…

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