# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=615

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

**Page:** 616

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## [Send and receive SMS with GSM and raspberry pi 3](https://discourse.nodered.org/t/send-and-receive-sms-with-gsm-and-raspberry-pi-3/19226)

<div class="topic-metadata">

**Author:** [@pooyatavan](https://discourse.nodered.org/u/pooyatavan)\
**Replies:** 14\
**Last updated:** [25 January 2021 22:52 UTC](https://discourse.nodered.org/t/send-and-receive-sms-with-gsm-and-raspberry-pi-3/19226 "2021-01-25T22:52:42Z")

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hi how can i send and receive on module GSM sim 800l. i put TX/RX pins from module to TX/RX raspberry pi. but i receive nothing from module. actually i don't know how its works. can someone help me to figure it out ? …

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## [Best Practice for messages between Node-RED instances](https://discourse.nodered.org/t/best-practice-for-messages-between-node-red-instances/39504)

<div class="topic-metadata">

**Author:** [@tree-frog](https://discourse.nodered.org/u/tree-frog)\
**Replies:** 12\
**Last updated:** [25 January 2021 22:48 UTC](https://discourse.nodered.org/t/best-practice-for-messages-between-node-red-instances/39504 "2021-01-25T22:48:02Z")

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I am beginning to expand an application to 2 instances of Node-RED. This is to separate defined core functions which we do not want to expose to technicians, and the individual installation particulars of integration to…

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## [Mqtt send block not sending data to the things network](https://discourse.nodered.org/t/mqtt-send-block-not-sending-data-to-the-things-network/39553)

<div class="topic-metadata">

**Author:** [@KikkertjeK](https://discourse.nodered.org/u/KikkertjeK)\
**Replies:** 10\
**Last updated:** [25 January 2021 22:47 UTC](https://discourse.nodered.org/t/mqtt-send-block-not-sending-data-to-the-things-network/39553 "2021-01-25T22:47:34Z")

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We are trying to send data to the thing network using mqtt. It connects to the things network but does not send the data. We have tried using multiple topics but it still would not work. The topic we are using now is bra…

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## [What is wrong with my function? Javascript "if" doesn't seem to work](https://discourse.nodered.org/t/what-is-wrong-with-my-function-javascript-if-doesnt-seem-to-work/39737)

<div class="topic-metadata">

**Author:** [@jabss](https://discourse.nodered.org/u/jabss)\
**Replies:** 2\
**Last updated:** [25 January 2021 22:47 UTC](https://discourse.nodered.org/t/what-is-wrong-with-my-function-javascript-if-doesnt-seem-to-work/39737 "2021-01-25T22:47:25Z")

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Hi, I admit I'm not javascript knowlegeable neither programmer.... I'm cutting/pasting pieces of code in order to make things work... I'm trying to get a flow working but I can't understand what I'm doing wrong on this…

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## [Flows do not survive a restart](https://discourse.nodered.org/t/flows-do-not-survive-a-restart/39731)

<div class="topic-metadata">

**Author:** [@Paka46](https://discourse.nodered.org/u/Paka46)\
**Replies:** 3\
**Last updated:** [25 January 2021 21:35 UTC](https://discourse.nodered.org/t/flows-do-not-survive-a-restart/39731 "2021-01-25T21:35:19Z")

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I am running Node-Red version 1.2.7 on Raspberry Pi. This was initially installed as version 1.1.3 The initial install and subsequent upgrade were done using the recommended script from: https://nodered.org/docs/gettin…

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## [MySQL Query and Process Select](https://discourse.nodered.org/t/mysql-query-and-process-select/39722)

<div class="topic-metadata">

**Author:** [@CybrPimp](https://discourse.nodered.org/u/CybrPimp)\
**Replies:** 3\
**Last updated:** [25 January 2021 21:05 UTC](https://discourse.nodered.org/t/mysql-query-and-process-select/39722 "2021-01-25T21:05:17Z")

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Ok, guys working through the problems as a new Node-Red user with the help of several. Thanks to everyone. So I have a MySQL Task setup and showing connected, but I'm not sure how to Query the database and process those…

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## [Add Custom Completition to javascript function node](https://discourse.nodered.org/t/add-custom-completition-to-javascript-function-node/39667)

<div class="topic-metadata">

**Author:** [@thomaspz](https://discourse.nodered.org/u/thomaspz)\
**Replies:** 6\
**Last updated:** [25 January 2021 19:56 UTC](https://discourse.nodered.org/t/add-custom-completition-to-javascript-function-node/39667 "2021-01-25T19:56:00Z")

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Is there a way to add custom code completition to the javascript function. Espacially I want to define some "global" objects, constants and/or functions which I want to use in almost every node, without knowning all name…

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## [influxDB record an action](https://discourse.nodered.org/t/influxdb-record-an-action/39713)

<div class="topic-metadata">

**Author:** [@877](https://discourse.nodered.org/u/877)\
**Replies:** 12\
**Last updated:** [25 January 2021 19:20 UTC](https://discourse.nodered.org/t/influxdb-record-an-action/39713 "2021-01-25T19:20:05Z")

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Hello all, I would like to learn how to show sensor events in Grafana, where initial the value is either text (in this case "vibration", or true/false). I was thinking a bar chart with time across the bottom. In this …

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## [Check the use of nodes in flows](https://discourse.nodered.org/t/check-the-use-of-nodes-in-flows/39719)

<div class="topic-metadata">

**Author:** [@pvklink](https://discourse.nodered.org/u/pvklink)\
**Replies:** 4\
**Last updated:** [25 January 2021 18:23 UTC](https://discourse.nodered.org/t/check-the-use-of-nodes-in-flows/39719 "2021-01-25T18:23:43Z")

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I want to cleanup my installed nodes. Is there a way to check if an installed node in the palette is use by flows ?

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## [How to copy files from SMB Share to SMB Share](https://discourse.nodered.org/t/how-to-copy-files-from-smb-share-to-smb-share/39672)

<div class="topic-metadata">

**Author:** [@alboubou](https://discourse.nodered.org/u/alboubou)\
**Replies:** 9\
**Last updated:** [25 January 2021 18:14 UTC](https://discourse.nodered.org/t/how-to-copy-files-from-smb-share-to-smb-share/39672 "2021-01-25T18:14:31Z")

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Hello Guys, It will be several weeks if not more than I tear my hair to make a file and directory copy with Node Red. If someone can help me, my brain will really appreciate :rofl: I expose my problem. I run Node Red…

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## [Nodes global variables](https://discourse.nodered.org/t/nodes-global-variables/39243)

<div class="topic-metadata">

**Author:** [@Marty1982](https://discourse.nodered.org/u/Marty1982)\
**Replies:** 29\
**Last updated:** [25 January 2021 18:02 UTC](https://discourse.nodered.org/t/nodes-global-variables/39243 "2021-01-25T18:02:35Z")

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Hi all! I want to compare the 1st value with the 2nd value and do something with that (nevermind that now), the main doubt is how to work with those values. Global variables? Is there any node which can resolve that n…

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## [Node Red Authentication PW Hash issue](https://discourse.nodered.org/t/node-red-authentication-pw-hash-issue/3472)

<div class="topic-metadata">

**Author:** [@jfehl](https://discourse.nodered.org/u/jfehl)\
**Replies:** 24\
**Last updated:** [25 January 2021 17:49 UTC](https://discourse.nodered.org/t/node-red-authentication-pw-hash-issue/3472 "2021-01-25T17:49:41Z")

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I am trying to apply authentication to my Node-Red. I am able to get the setting.js edited so that it requests Username and PW. I am able to insert a different username, however...using the node-red-admin Hash-pw, I a…

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## [Enable User Auth to Editor, custom Password hash not working](https://discourse.nodered.org/t/enable-user-auth-to-editor-custom-password-hash-not-working/39702)

<div class="topic-metadata">

**Author:** [@CybrPimp](https://discourse.nodered.org/u/CybrPimp)\
**Replies:** 2\
**Last updated:** [25 January 2021 17:48 UTC](https://discourse.nodered.org/t/enable-user-auth-to-editor-custom-password-hash-not-working/39702 "2021-01-25T17:48:12Z")

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Ok, guys. New to NR here, so be easy please. :wink: I have installed on a Windows PC and have edited my settings.js file. I originally was editing the wrong file in the %AppData% folder but have now changed the one in…

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## [CSV node - coloum header](https://discourse.nodered.org/t/csv-node-coloum-header/39715)

<div class="topic-metadata">

**Author:** [@maru2648](https://discourse.nodered.org/u/maru2648)\
**Replies:** 1\
**Last updated:** [25 January 2021 15:54 UTC](https://discourse.nodered.org/t/csv-node-coloum-header/39715 "2021-01-25T15:54:52Z")

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Hello all, I have created a flow with which I can read my modbus and write the data to a CSV file. However, I have problems with the heading of the columns in the CSV file. Here is my flow I have conifugated the CSV…

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## [Custom "change" node](https://discourse.nodered.org/t/custom-change-node/39717)

<div class="topic-metadata">

**Author:** [@fmarzocca](https://discourse.nodered.org/u/fmarzocca)\
**Replies:** 2\
**Last updated:** [25 January 2021 15:54 UTC](https://discourse.nodered.org/t/custom-change-node/39717 "2021-01-25T15:54:20Z")

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Hi, I have a "change" node with 4 rules that I have customized for my special purpose. AS I need to use that node several times in my flows, is there a way to save it and re-use it when I need?

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## [Variables in node pushover](https://discourse.nodered.org/t/variables-in-node-pushover/20298)

<div class="topic-metadata">

**Author:** [@pvanklink](https://discourse.nodered.org/u/pvanklink)\
**Replies:** 4\
**Last updated:** [25 January 2021 15:44 UTC](https://discourse.nodered.org/t/variables-in-node-pushover/20298 "2021-01-25T15:44:16Z")

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I like to have one place where i store my permanent variables. At this moment i use a change to set some globals. I like to add the user-key and api-token to it. Ho do i refer to this globals in the pushover-node? Or …

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## [Email a table from PostreSQL data](https://discourse.nodered.org/t/email-a-table-from-postresql-data/39659)

<div class="topic-metadata">

**Author:** [@AndrePretorius](https://discourse.nodered.org/u/AndrePretorius)\
**Replies:** 2\
**Last updated:** [25 January 2021 15:26 UTC](https://discourse.nodered.org/t/email-a-table-from-postresql-data/39659 "2021-01-25T15:26:17Z")

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Hi There I am trying to send data from a PostgreSQL query via a HTML function through Email. The problem is to dynamically create the rows. Here is what i have so far in a standard template node. Any advice would be ap…

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## [How to send to a variable list of Pushover receivers?](https://discourse.nodered.org/t/how-to-send-to-a-variable-list-of-pushover-receivers/39709)

<div class="topic-metadata">

**Author:** [@Gawan](https://discourse.nodered.org/u/Gawan)\
**Replies:** 5\
**Last updated:** [25 January 2021 15:04 UTC](https://discourse.nodered.org/t/how-to-send-to-a-variable-list-of-pushover-receivers/39709 "2021-01-25T15:04:08Z")

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Hi, is it possible to send messages to a variable list of pushover receivers ? If I use node-red-contrib-pushover I am limited to only one specific and "hard-coded" receiver, but thats not what I want. I want to send …

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## [Looking for NodeRed Developer](https://discourse.nodered.org/t/looking-for-nodered-developer/39577)

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**Author:** [@davidmarch](https://discourse.nodered.org/u/davidmarch)\
**Replies:** 1\
**Last updated:** [25 January 2021 14:44 UTC](https://discourse.nodered.org/t/looking-for-nodered-developer/39577 "2021-01-25T14:44:01Z")

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Hi. Looking for a NR developer with strong API and JS math programming skills. We use NR to control industrial generators, interfacing with a number of cloud systems as well. We have done the development in-house and no…

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## [Help - mux2to1 logic using functions](https://discourse.nodered.org/t/help-mux2to1-logic-using-functions/39675)

<div class="topic-metadata">

**Author:** [@edimi](https://discourse.nodered.org/u/edimi)\
**Replies:** 5\
**Last updated:** [25 January 2021 12:13 UTC](https://discourse.nodered.org/t/help-mux2to1-logic-using-functions/39675 "2021-01-25T12:13:09Z")

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Hello to everyone, i have zero node-red and javascript experience. I want to choose between the output of 2 nodes. The selection will depend on the output of a third node. I have a "solenoid valve switch" node and a "s…

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## [How to formatting output in "Notification node"](https://discourse.nodered.org/t/how-to-formatting-output-in-notification-node/39309)

<div class="topic-metadata">

**Author:** [@mariulin](https://discourse.nodered.org/u/mariulin)\
**Replies:** 11\
**Last updated:** [25 January 2021 08:56 UTC](https://discourse.nodered.org/t/how-to-formatting-output-in-notification-node/39309 "2021-01-25T08:56:02Z")

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Hi folks. I'm using a "Button node" to execute a Linux system command then I pass the payload to a "Exec node" then to a "Notification node". The problem is that the output is on one line like this: . In "debug node" …

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## [OPCUA - write byte of array](https://discourse.nodered.org/t/opcua-write-byte-of-array/39704)

<div class="topic-metadata">

**Author:** [@Mattia.88](https://discourse.nodered.org/u/Mattia.88)\
**Replies:** 0\
**Last updated:** [25 January 2021 10:54 UTC](https://discourse.nodered.org/t/opcua-write-byte-of-array/39704 "2021-01-25T10:54:02Z")

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Goodmorning, i must write a byte array with OpcUa (see images). I created an variabile array, i inserted into variable the values and I moved this variabile into "msg.payload", but this method perhaps in not corr…

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## [Ok, new to Node Red, how to do back Webhook?](https://discourse.nodered.org/t/ok-new-to-node-red-how-to-do-back-webhook/39585)

<div class="topic-metadata">

**Author:** [@CybrPimp](https://discourse.nodered.org/u/CybrPimp)\
**Replies:** 13\
**Last updated:** [25 January 2021 10:20 UTC](https://discourse.nodered.org/t/ok-new-to-node-red-how-to-do-back-webhook/39585 "2021-01-25T10:20:43Z")

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Hey guys, first day on NodeRed and it is a bit confusing how to setup a basic webhook. Can anyone offer up a good guild?

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## [Credentials in API flows](https://discourse.nodered.org/t/credentials-in-api-flows/39693)

<div class="topic-metadata">

**Author:** [@donalddck](https://discourse.nodered.org/u/donalddck)\
**Replies:** 2\
**Last updated:** [25 January 2021 09:35 UTC](https://discourse.nodered.org/t/credentials-in-api-flows/39693 "2021-01-25T09:35:32Z")

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Hello, I'm trying to use the flows api (GET) to retrieve all configurations. In the API result there aren't the nodes credentials For example in mqtt-broker config there are all configurations but there aren't Securit…

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## [Enabling nodes automatically for double environment](https://discourse.nodered.org/t/enabling-nodes-automatically-for-double-environment/39695)

<div class="topic-metadata">

**Author:** [@Meng](https://discourse.nodered.org/u/Meng)\
**Replies:** 0\
**Last updated:** [25 January 2021 08:59 UTC](https://discourse.nodered.org/t/enabling-nodes-automatically-for-double-environment/39695 "2021-01-25T08:59:13Z")

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I am using a separate development and live node-red environment, so that i can work in the development environment without loosing uptime and input messages. Every time i am upgrading the live environment to the newest w…

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## [Change the display of node property](https://discourse.nodered.org/t/change-the-display-of-node-property/39686)

<div class="topic-metadata">

**Author:** [@chiche](https://discourse.nodered.org/u/chiche)\
**Replies:** 4\
**Last updated:** [25 January 2021 08:31 UTC](https://discourse.nodered.org/t/change-the-display-of-node-property/39686 "2021-01-25T08:31:29Z")

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As I know, the sidebar is displaying node property. How can I change the appearance of the node property here without editing the default property node? For example RED.nodes.registerType ("node-test", { colorSvg: …

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## [Probleme mit Light Scheduler](https://discourse.nodered.org/t/probleme-mit-light-scheduler/39694)

<div class="topic-metadata">

**Author:** [@Mercurisus](https://discourse.nodered.org/u/Mercurisus)\
**Replies:** 1\
**Last updated:** [25 January 2021 08:26 UTC](https://discourse.nodered.org/t/probleme-mit-light-scheduler/39694 "2021-01-25T08:26:29Z")

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Hallo, ich bin leider noch nicht so bewandert was Node Red angeht, ich hoffe Ihr könnt mit helfen. Aktuell plane ich meine Heizthermostat mit einem Zeitplan zu steuern. Zum Einsatz kommen mehrere MCO Home - Thermostat…

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## [How to collect the newest data in every 15 mins](https://discourse.nodered.org/t/how-to-collect-the-newest-data-in-every-15-mins/39691)

<div class="topic-metadata">

**Author:** [@Arthur123124](https://discourse.nodered.org/u/Arthur123124)\
**Replies:** 4\
**Last updated:** [25 January 2021 07:59 UTC](https://discourse.nodered.org/t/how-to-collect-the-newest-data-in-every-15-mins/39691 "2021-01-25T07:59:28Z")

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i am Note-red beginner. i was watching a lot of video to find out how to collect the newest data in every 15 mins. The background is i want to create the database that data sends to database in every 15 mins which need t…

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## [How to convert string to object in change node?](https://discourse.nodered.org/t/how-to-convert-string-to-object-in-change-node/39650)

<div class="topic-metadata">

**Author:** [@Nolram12345](https://discourse.nodered.org/u/Nolram12345)\
**Replies:** 5\
**Last updated:** [25 January 2021 07:44 UTC](https://discourse.nodered.org/t/how-to-convert-string-to-object-in-change-node/39650 "2021-01-25T07:44:15Z")

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Hello, I am quite new to Node-RED so excuse this probably quite obvious question. I have the requirement of converting a string msg.payload to an object I can then further process, as currently I get the error Cannot se…

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## [Return CLI output from a Cisco 5k Switch](https://discourse.nodered.org/t/return-cli-output-from-a-cisco-5k-switch/39685)

<div class="topic-metadata">

**Author:** [@mrdanedwards](https://discourse.nodered.org/u/mrdanedwards)\
**Replies:** 2\
**Last updated:** [25 January 2021 07:15 UTC](https://discourse.nodered.org/t/return-cli-output-from-a-cisco-5k-switch/39685 "2021-01-25T07:15:25Z")

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Hello All, I am pretty new to Node-Red, and have been using Node-Red-Dashboard to make a network monitoring screen for a network of Cisco 5k, Cisco 2K FEX's and 60x Cisco SG250 Switches. I have managed to make quite a …

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