# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=968

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

**Page:** 969

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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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## [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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## [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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## [Join: make a complete array](https://discourse.nodered.org/t/join-make-a-complete-array/192)

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**Author:** [@Joris6](https://discourse.nodered.org/u/Joris6)\
**Replies:** 9\
**Last updated:** [17 May 2018 20:58 UTC](https://discourse.nodered.org/t/join-make-a-complete-array/192 "2018-05-17T20:58:52Z")

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Hello people, I’ve got a question regarding the join and create an array out of x elements. What I want is to create an array out of two other elements. Until now I am able to make incomplete arrays. I noticed when you…

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## [Publish from Arduino Sketch to Node-Red - wanting to send Values (not strings) - results in \[250, 0\]](https://discourse.nodered.org/t/publish-from-arduino-sketch-to-node-red-wanting-to-send-values-not-strings-results-in-250-0/196)

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**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 3\
**Last updated:** [16 May 2018 16:57 UTC](https://discourse.nodered.org/t/publish-from-arduino-sketch-to-node-red-wanting-to-send-values-not-strings-results-in-250-0/196 "2018-05-16T16:57:59Z")

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I posted this earlier today on the Google Group before seeing that these new forums were up and running Guys , Still a babe in the woods with all this stuff. Essentially i am trying to send Temperature Values (and la…

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## [MsgPayload into a query on nodered-sqlite](https://discourse.nodered.org/t/msgpayload-into-a-query-on-nodered-sqlite/142)

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**Author:** [@fsnog87](https://discourse.nodered.org/u/fsnog87)\
**Replies:** 2\
**Last updated:** [16 May 2018 15:52 UTC](https://discourse.nodered.org/t/msgpayload-into-a-query-on-nodered-sqlite/142 "2018-05-16T15:52:28Z")

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Hi everyone, I’m Fabio and i’m using node-red for some days and i’m a newbie for sure. It allowed me to integrate many “black boxes” easily. However i have a problem that i cannot get around: I’m using a great node th…

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## [how can I connect an existing tcp connection on node-red with a java application through a JSON file](https://discourse.nodered.org/t/how-can-i-connect-an-existing-tcp-connection-on-node-red-with-a-java-application-through-a-json-file/169)

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**Author:** [@lina](https://discourse.nodered.org/u/lina)\
**Replies:** 2\
**Last updated:** [16 May 2018 14:41 UTC](https://discourse.nodered.org/t/how-can-i-connect-an-existing-tcp-connection-on-node-red-with-a-java-application-through-a-json-file/169 "2018-05-16T14:41:49Z")

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hello. how can I connect an existing tcp connection on node-red with a java application through a JSON file? I have a tcp connection on node-red and I want the info that I get there to be exported as a Json file that a…

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## [BASpi IO Shield/hat](https://discourse.nodered.org/t/baspi-io-shield-hat/195)

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**Author:** [@karlbo](https://discourse.nodered.org/u/karlbo)\
**Replies:** 1\
**Last updated:** [16 May 2018 10:01 UTC](https://discourse.nodered.org/t/baspi-io-shield-hat/195 "2018-05-16T10:01:26Z")

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Hi, good morning. Has anyone tried to use the BASpi hat with Node-Red? I just found it this morning doing a search for alternative IO shield/hat also i did a search here in the forum without any hits on BASpi Im thin…

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## [All nodes are "invisible" after an update of Node.js and Node-RED](https://discourse.nodered.org/t/all-nodes-are-invisible-after-an-update-of-node-js-and-node-red/174)

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**Author:** [@coolchip](https://discourse.nodered.org/u/coolchip)\
**Replies:** 5\
**Last updated:** [15 May 2018 18:40 UTC](https://discourse.nodered.org/t/all-nodes-are-invisible-after-an-update-of-node-js-and-node-red/174 "2018-05-15T18:40:57Z")

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Hello, yesterday I had to reinstall my Node.js because some dependencies to node-gyp and semver were broken. Also my Node-RED was outdated (0.18.4). So I did the following steps: Upgrade Node-RED to 0.18.5 Remove Node…

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## [Easiest way to convert from GMT into Local](https://discourse.nodered.org/t/easiest-way-to-convert-from-gmt-into-local/141)

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**Author:** [@jonyan](https://discourse.nodered.org/u/jonyan)\
**Replies:** 3\
**Last updated:** [13 May 2018 22:36 UTC](https://discourse.nodered.org/t/easiest-way-to-convert-from-gmt-into-local/141 "2018-05-13T22:36:35Z")

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Hello - I am taking timestamps and inserting them into SQLite which come from energy readings off my solar panel. The API I am using is from WattVision and they are reporting the times GMT. My goal is to write a funct…

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## [Slider and button define timeout](https://discourse.nodered.org/t/slider-and-button-define-timeout/126)

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**Author:** [@igrowing](https://discourse.nodered.org/u/igrowing)\
**Replies:** 6\
**Last updated:** [13 May 2018 17:35 UTC](https://discourse.nodered.org/t/slider-and-button-define-timeout/126 "2018-05-13T17:35:49Z")

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Likely, this question is asked somewhere already, please help to locate the answer. I have slider (or numeric) UI node and a switch UI node at the same group in the flow. From this guide I understand that somehow I can …

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## [What are the supported module specifiers with API](https://discourse.nodered.org/t/what-are-the-supported-module-specifiers-with-api/136)

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**Author:** [@gbiv4](https://discourse.nodered.org/u/gbiv4)\
**Replies:** 0\
**Last updated:** [13 May 2018 05:26 UTC](https://discourse.nodered.org/t/what-are-the-supported-module-specifiers-with-api/136 "2018-05-13T05:26:10Z")

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Hi all, According to the docs for /nodes POST Either the name of the node module to install from the npm repository, or a full path to a \>directory containing the node module. Note: this api does not support the full …

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## [Intergrate sms alerts on my raspberry-pi](https://discourse.nodered.org/t/intergrate-sms-alerts-on-my-raspberry-pi/111)

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**Author:** [@Sami](https://discourse.nodered.org/u/Sami)\
**Replies:** 9\
**Last updated:** [12 May 2018 22:30 UTC](https://discourse.nodered.org/t/intergrate-sms-alerts-on-my-raspberry-pi/111 "2018-05-12T22:30:44Z")

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Hi, I want to intergrate sms alerts on my raspberry-pi using a usb dongle. I can send and recieve using “LXTerminal” Are there any tutorial discribing this operation with node-red. Many thanks! Bye!

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## [Python Shell to msg payload or Python Function](https://discourse.nodered.org/t/python-shell-to-msg-payload-or-python-function/118)

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**Author:** [@chris.egge](https://discourse.nodered.org/u/chris.egge)\
**Replies:** 5\
**Last updated:** [12 May 2018 15:16 UTC](https://discourse.nodered.org/t/python-shell-to-msg-payload-or-python-function/118 "2018-05-12T15:16:00Z")

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I guess this could be considered a dashboard question even though it centers more around the python shell and python function. Just to give you an idea of what i am trying to do, i am trying to run the Pylogix script mod…

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## [\[solved\]Arduino input node not connecting](https://discourse.nodered.org/t/solved-arduino-input-node-not-connecting/125)

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**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 2\
**Last updated:** [12 May 2018 14:29 UTC](https://discourse.nodered.org/t/solved-arduino-input-node-not-connecting/125 "2018-05-12T14:29:05Z")

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I decided to try out the Arduino node but I can’t get the input one to work. I loaded standardFirmata onto a Uno. The output blinking pin 13 is working fine. Input node just says connecting… Any ideas? Node-RED 0.1…

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## [CA Certs for email](https://discourse.nodered.org/t/ca-certs-for-email/80)

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**Author:** [@cmrwash](https://discourse.nodered.org/u/cmrwash)\
**Replies:** 3\
**Last updated:** [11 May 2018 17:55 UTC](https://discourse.nodered.org/t/ca-certs-for-email/80 "2018-05-11T17:55:54Z")

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Need to send emails using CA Certs. how do i set this up? running on a raspberry pi 3b & Raspbain. the email service “CLAWS” that comes with Reaspbain is easy to setup but can’t find a way in node-red.

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## [Logging node wanted](https://discourse.nodered.org/t/logging-node-wanted/65)

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**Author:** [@igrowing](https://discourse.nodered.org/u/igrowing)\
**Replies:** 7\
**Last updated:** [11 May 2018 17:23 UTC](https://discourse.nodered.org/t/logging-node-wanted/65 "2018-05-11T17:23:05Z")

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Hi, node-red newbie is here. There is logging settings in .node-red/settings.js. The configuration of its 3 properties is clear. An ability of adding of custom logger is clear. I wonder if the built-in logging saves an…

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## [Using node-red in between a web app and server](https://discourse.nodered.org/t/using-node-red-in-between-a-web-app-and-server/62)

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**Author:** [@largolobo](https://discourse.nodered.org/u/largolobo)\
**Replies:** 3\
**Last updated:** [11 May 2018 09:00 UTC](https://discourse.nodered.org/t/using-node-red-in-between-a-web-app-and-server/62 "2018-05-11T09:00:46Z")

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Specifically: node developed app using Express to MongoDB… how can I best inject node-red to utilized its special skills, i.e., dashboard graphics.

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## [problems with excel files](https://discourse.nodered.org/t/problems-with-excel-files/50)

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**Author:** [@Andres](https://discourse.nodered.org/u/Andres)\
**Replies:** 1\
**Last updated:** [10 May 2018 14:42 UTC](https://discourse.nodered.org/t/problems-with-excel-files/50 "2018-05-10T14:42:04Z")

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Hi everyone, i'm having troubles when i try to upload an excel file and try to open it with the "alafile" node. there are two instances, the first one is with the original file, that gets uploaded just fine, and then the…

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## [The first post of the new forum!](https://discourse.nodered.org/t/the-first-post-of-the-new-forum/18)

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**Author:** [@knolleary](https://discourse.nodered.org/u/knolleary)\
**Replies:** 0\
**Last updated:** [8 May 2018 20:21 UTC](https://discourse.nodered.org/t/the-first-post-of-the-new-forum/18 "2018-05-08T20:21:46Z")

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Hi, this is the new Node-RED forum. The Google Group mailing list has served us well over the last few years, but it’s time to move on to something new. This forum is kindly hosted by discourse.org and provides lots of …

[Previous page](https://discourse.nodered.org/c/general/7.md?page=967)