# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=532

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

**Page:** 533

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## [Managing flow running at interval with time](https://discourse.nodered.org/t/managing-flow-running-at-interval-with-time/47626)

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**Author:** [@OmkarNodered](https://discourse.nodered.org/u/OmkarNodered)\
**Replies:** 3\
**Last updated:** [25 June 2021 08:39 UTC](https://discourse.nodered.org/t/managing-flow-running-at-interval-with-time/47626 "2021-06-25T08:39:16Z")

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I have a flow which is injecting timestamp on debug console for every 8 hours. Now, lets consider at 8 AM I have started flow, so it will inject timestamp at 8 AM and next time it injects after 8 hours i.e at 4PM. If i…

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## [How to use global.set in my case](https://discourse.nodered.org/t/how-to-use-global-set-in-my-case/47629)

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**Author:** [@bibi-b](https://discourse.nodered.org/u/bibi-b)\
**Replies:** 16\
**Last updated:** [25 June 2021 08:29 UTC](https://discourse.nodered.org/t/how-to-use-global-set-in-my-case/47629 "2021-06-25T08:29:56Z")

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Hi there, i like to use a function node to bring incomming messages to a global value. Hard for me to discribe, as the problem seems to be very rare. Lets try: My recent code: var name = msg.channelName; var status …

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## [What node i can use it that input value(ex : 0~5000)?](https://discourse.nodered.org/t/what-node-i-can-use-it-that-input-value-ex-0-5000/47615)

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**Author:** [@jlian168](https://discourse.nodered.org/u/jlian168)\
**Replies:** 10\
**Last updated:** [25 June 2021 08:28 UTC](https://discourse.nodered.org/t/what-node-i-can-use-it-that-input-value-ex-0-5000/47615 "2021-06-25T08:28:40Z")

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Dear All : Like title, How do to? Thank u?

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## [This can't be good - Updating nodes](https://discourse.nodered.org/t/this-cant-be-good-updating-nodes/47610)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 5\
**Last updated:** [25 June 2021 08:14 UTC](https://discourse.nodered.org/t/this-cant-be-good-updating-nodes/47610 "2021-06-25T08:14:31Z")

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Running: RasPi 2 B Buster NR 1.3.5 Node.js 12.22.1 I thought I would update a few nodes to more recent ones. This is what I see: Going to /var/log no activity on anything with node-red in its name. Where do I l…

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## [Installing NR on latest Openplotter](https://discourse.nodered.org/t/installing-nr-on-latest-openplotter/47559)

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**Author:** [@kenkoknz](https://discourse.nodered.org/u/kenkoknz)\
**Replies:** 6\
**Last updated:** [25 June 2021 08:09 UTC](https://discourse.nodered.org/t/installing-nr-on-latest-openplotter/47559 "2021-06-25T08:09:14Z")

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Just clean installed latest Openplotter on rpi and seems to work, but when I try install NR using standard Bash script, got this msg: Running Node-RED install for user pi at /home/pi on raspbian Node-RED v2 no longer s…

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## [Upcoming V2.0 release - incompatible with older devices?](https://discourse.nodered.org/t/upcoming-v2-0-release-incompatible-with-older-devices/47580)

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**Author:** [@haegar33](https://discourse.nodered.org/u/haegar33)\
**Replies:** 6\
**Last updated:** [25 June 2021 08:00 UTC](https://discourse.nodered.org/t/upcoming-v2-0-release-incompatible-with-older-devices/47580 "2021-06-25T08:00:36Z")

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One of the reason to shift my complete smarthome setup to NR was the dashboards widgets which are still (more or less) compatible with older browser system like on my old 2012 iPad which is perfect as a permanent info bo…

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## [Using an additional npm repository for nodes](https://discourse.nodered.org/t/using-an-additional-npm-repository-for-nodes/47628)

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**Author:** [@H3llsing](https://discourse.nodered.org/u/H3llsing)\
**Replies:** 0\
**Last updated:** [25 June 2021 07:54 UTC](https://discourse.nodered.org/t/using-an-additional-npm-repository-for-nodes/47628 "2021-06-25T07:54:51Z")

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hello :slight\_smile: i would like to enable the palette to install from a private repo aswell. i found this design draft from 2016 but i couldn't find any hints on the current progress. just a .npmrc inside the node…

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## [Cant install mqtt](https://discourse.nodered.org/t/cant-install-mqtt/47604)

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**Author:** [@addi](https://discourse.nodered.org/u/addi)\
**Replies:** 7\
**Last updated:** [25 June 2021 07:35 UTC](https://discourse.nodered.org/t/cant-install-mqtt/47604 "2021-06-25T07:35:43Z")

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Hi All! Can somebody explain why Ive got installation problems of mqtt when I do npm install node-red-contrib-mqtt-broker Installation log is here: I do it on PI4 B 2GB Please help!

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## [Drop down by filtering csv](https://discourse.nodered.org/t/drop-down-by-filtering-csv/47563)

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**Author:** [@sahsha](https://discourse.nodered.org/u/sahsha)\
**Replies:** 7\
**Last updated:** [25 June 2021 07:28 UTC](https://discourse.nodered.org/t/drop-down-by-filtering-csv/47563 "2021-06-25T07:28:42Z")

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hello! need help with a flow. the drop down "work center" & "Order No" not working properly. On pressing button "fetch orders" pushes the work center data in dropdown and on selection it filters the data and pushes next…

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## [If I hv 5 input node, how to select to which input?](https://discourse.nodered.org/t/if-i-hv-5-input-node-how-to-select-to-which-input/47621)

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**Author:** [@jlian168](https://discourse.nodered.org/u/jlian168)\
**Replies:** 1\
**Last updated:** [25 June 2021 07:01 UTC](https://discourse.nodered.org/t/if-i-hv-5-input-node-how-to-select-to-which-input/47621 "2021-06-25T07:01:46Z")

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Dear All : Like title, How to do ? Thank u?

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## [Push csv row values in dropdown](https://discourse.nodered.org/t/push-csv-row-values-in-dropdown/47291)

<div class="topic-metadata">

**Author:** [@sahsha](https://discourse.nodered.org/u/sahsha)\
**Replies:** 8\
**Last updated:** [25 June 2021 05:46 UTC](https://discourse.nodered.org/t/push-csv-row-values-in-dropdown/47291 "2021-06-25T05:46:28Z")

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I'm trying to push csv row values into a dropdown. need help on this. \[{"id":"c8c78f4d.679e8","type":"subflow","name":"csvColumnParser","info":"","category":"","in":\[{"x":70,"y":80,"wires":\[{"id":"a8857356.d49e68"}\]}\],"…

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## [Environment Variables for MQTT credentials](https://discourse.nodered.org/t/environment-variables-for-mqtt-credentials/47614)

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**Author:** [@ChrisBrockett-rb](https://discourse.nodered.org/u/ChrisBrockett-rb)\
**Replies:** 1\
**Last updated:** [25 June 2021 05:26 UTC](https://discourse.nodered.org/t/environment-variables-for-mqtt-credentials/47614 "2021-06-25T05:26:22Z")

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Hi all, I'm trying to use environment variables to set up credentials for the MQTT nodes, however the password field does not seem to be able to read in an environment variable as its input. The environment variable is …

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## [Fuction node for sending telegram make problem with \> \<](https://discourse.nodered.org/t/fuction-node-for-sending-telegram-make-problem-with/47603)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 4\
**Last updated:** [25 June 2021 04:30 UTC](https://discourse.nodered.org/t/fuction-node-for-sending-telegram-make-problem-with/47603 "2021-06-25T04:30:48Z")

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function Node for telegram it works fine except i use a \< \> in the let variable . if i remove it works adding it make error let GS1 = "GS1: \< 75"; let GS5 = "GS5: \> 190"; any idea how to make this a pass? have a …

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## [Subflows - question about names](https://discourse.nodered.org/t/subflows-question-about-names/47609)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 3\
**Last updated:** [24 June 2021 23:05 UTC](https://discourse.nodered.org/t/subflows-question-about-names/47609 "2021-06-24T23:05:11Z")

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Ok, I write a subflow. For the sake of being nice I add a catch node to catch any errors and send that to an output so I can use it in the real world. But I seem to be missing the trick where I can name the subflow. (…

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## [Refuse IP Connections](https://discourse.nodered.org/t/refuse-ip-connections/47570)

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**Author:** [@alexander77](https://discourse.nodered.org/u/alexander77)\
**Replies:** 3\
**Last updated:** [24 June 2021 20:28 UTC](https://discourse.nodered.org/t/refuse-ip-connections/47570 "2021-06-24T20:28:17Z")

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Due to workload circumstances i want to allow a maximum of 10 connections to a tcp server at an specified port. How can i refuse an 11th connection without affecting the existing connections? In addition, is it possible…

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## [Payload global. or flow](https://discourse.nodered.org/t/payload-global-or-flow/47602)

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**Author:** [@dsplitz](https://discourse.nodered.org/u/dsplitz)\
**Replies:** 7\
**Last updated:** [24 June 2021 20:26 UTC](https://discourse.nodered.org/t/payload-global-or-flow/47602 "2021-06-24T20:26:30Z")

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In many nodes you can select the payload to be global. or flow. ( as well as number, string, buffer....) Can anyone please point to documentation or examples on how these are used. I've had no lock searching on my own. …

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## [Influxdb node setting more values](https://discourse.nodered.org/t/influxdb-node-setting-more-values/47586)

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**Author:** [@mynoderocks](https://discourse.nodered.org/u/mynoderocks)\
**Replies:** 10\
**Last updated:** [24 June 2021 19:51 UTC](https://discourse.nodered.org/t/influxdb-node-setting-more-values/47586 "2021-06-24T19:51:26Z")

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Hi all, I am currently using the influxdb out node to write values coming from my MQTT queue. Works wonders. I have two questions though: Right now its writing the value as: { "time": "2021-06-24T14:37:49.495751…

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## [Modbus tcp not installed](https://discourse.nodered.org/t/modbus-tcp-not-installed/47560)

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**Author:** [@addi](https://discourse.nodered.org/u/addi)\
**Replies:** 3\
**Last updated:** [24 June 2021 19:43 UTC](https://discourse.nodered.org/t/modbus-tcp-not-installed/47560 "2021-06-24T19:43:17Z")

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Hi All! Im newbe in node-red, I installed it on PI 4 B(2GB), and when I do install,- npm install node-red-contrib-modbus-tcp-ip I have got the folling install flow npm WARN saveError ENOENT: no such file or directory,…

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## [Parse json to get particular value](https://discourse.nodered.org/t/parse-json-to-get-particular-value/47594)

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**Author:** [@iker](https://discourse.nodered.org/u/iker)\
**Replies:** 5\
**Last updated:** [24 June 2021 19:29 UTC](https://discourse.nodered.org/t/parse-json-to-get-particular-value/47594 "2021-06-24T19:29:12Z")

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Hi there! I'm struggling to get some info from an mqtt message parsed as json, as I'm unable to retrieve one of the particular values I need to further build a dashboard. I've made different approaches with no success. …

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## [Node-red-contrib-mssql-plus: "invalid column type..."](https://discourse.nodered.org/t/node-red-contrib-mssql-plus-invalid-column-type/47597)

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**Author:** [@IoTPlay](https://discourse.nodered.org/u/IoTPlay)\
**Replies:** 3\
**Last updated:** [24 June 2021 19:22 UTC](https://discourse.nodered.org/t/node-red-contrib-mssql-plus-invalid-column-type/47597 "2021-06-24T19:22:09Z")

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Hi @Steve-Mcl, I must be doing something stupid, but getting message: "Invalid column type from bcp client for colid 2. I got another bult upload working - so do not understand the issue on colid 2 - Customer nvarchar(20…

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## [Pi - npm 7.18.1 upgrade OK?](https://discourse.nodered.org/t/pi-npm-7-18-1-upgrade-ok/47587)

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**Author:** [@plfinch](https://discourse.nodered.org/u/plfinch)\
**Replies:** 2\
**Last updated:** [24 June 2021 18:23 UTC](https://discourse.nodered.org/t/pi-npm-7-18-1-upgrade-ok/47587 "2021-06-24T18:23:15Z")

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The npm update is suggesting I upgrade from 6.14.13 to 7.18.1. I seem to recall trying to upgrade to a version 7 release a ways back and encountered issues. Is node-red on Pi v1.3.5 compatible with and should I upgrade t…

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## [MatLab/Simulink Node-Red](https://discourse.nodered.org/t/matlab-simulink-node-red/46150)

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**Author:** [@Martin10](https://discourse.nodered.org/u/Martin10)\
**Replies:** 13\
**Last updated:** [24 June 2021 17:35 UTC](https://discourse.nodered.org/t/matlab-simulink-node-red/46150 "2021-06-24T17:35:50Z")

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Hi, i came across on info (and clip), that NR and Matlab/simulink can exchange data via MQTT, UDP... Is it any example? I found this, but it is not English, so i don't understand much (Sending data from simulink to nod…

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## [How to send HEX buffer via NodeRed](https://discourse.nodered.org/t/how-to-send-hex-buffer-via-nodered/47439)

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**Author:** [@NatanST](https://discourse.nodered.org/u/NatanST)\
**Replies:** 4\
**Last updated:** [24 June 2021 17:22 UTC](https://discourse.nodered.org/t/how-to-send-hex-buffer-via-nodered/47439 "2021-06-24T17:22:33Z")

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Hi! I'm a newbie using Node-RED and I'm having some issues when I try to send messages in HEX. This is the conversion table that I need: I have a setup with 4 stepper motors and I'm connecting through bluetooth. My i…

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## [Recording a sequence of sensor data for a defined time on trigger](https://discourse.nodered.org/t/recording-a-sequence-of-sensor-data-for-a-defined-time-on-trigger/47567)

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**Author:** [@Bastian](https://discourse.nodered.org/u/Bastian)\
**Replies:** 11\
**Last updated:** [24 June 2021 15:39 UTC](https://discourse.nodered.org/t/recording-a-sequence-of-sensor-data-for-a-defined-time-on-trigger/47567 "2021-06-24T15:39:40Z")

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Hi there, I'm new to node-RED and not familiar to java script at all. I started an automation project at work were I want to collect sensor data from different sources and send them to a db via MQTT. Fotos, forms (via…

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## [Msg.Payload Change](https://discourse.nodered.org/t/msg-payload-change/47581)

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**Author:** [@mynoderocks](https://discourse.nodered.org/u/mynoderocks)\
**Replies:** 4\
**Last updated:** [24 June 2021 14:08 UTC](https://discourse.nodered.org/t/msg-payload-change/47581 "2021-06-24T14:08:51Z")

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Hi all, I am sure I am doing something really simple here. I have a ping node which pings an IP address. On successful ping I get the msg.payload with the ms of the ping example: {"payload":0.26,"topic":"192.168.x.x","…

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## [Display a chart in PDF](https://discourse.nodered.org/t/display-a-chart-in-pdf/20040)

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**Author:** [@wojtekdera](https://discourse.nodered.org/u/wojtekdera)\
**Replies:** 16\
**Last updated:** [24 June 2021 13:35 UTC](https://discourse.nodered.org/t/display-a-chart-in-pdf/20040 "2021-06-24T13:35:50Z")

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Hello! I have a problem with adding a chart to PDF. I want to put a chart in my Raport in PDF for a client but I haven't had any achievements in this field for several days. This is the last thing I need to do. I'm usi…

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## [RED.events inside function node?](https://discourse.nodered.org/t/red-events-inside-function-node/47519)

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**Author:** [@H3llsing](https://discourse.nodered.org/u/H3llsing)\
**Replies:** 5\
**Last updated:** [24 June 2021 12:58 UTC](https://discourse.nodered.org/t/red-events-inside-function-node/47519 "2021-06-24T12:58:13Z")

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Hey there, i was wondering if its possible to use RED.events.emit('myEvent',callback) inside a function node? EDIT does not look like it's available EDIT2 i just created a custom node which emits a nodeRED event …

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## [HowTo refresh installed nodes](https://discourse.nodered.org/t/howto-refresh-installed-nodes/47577)

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**Author:** [@Moosbueffel](https://discourse.nodered.org/u/Moosbueffel)\
**Replies:** 1\
**Last updated:** [24 June 2021 12:25 UTC](https://discourse.nodered.org/t/howto-refresh-installed-nodes/47577 "2021-06-24T12:25:17Z")

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I reinstalled my pi and NR. So I have to download all additional mudules I used via the palette menu in NR. I have had the console open, so I saw some warnings about depricated modules. I'm not so firm with this context…

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## [Conflicts between MongoDB and Bluemix Nodes](https://discourse.nodered.org/t/conflicts-between-mongodb-and-bluemix-nodes/47544)

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**Author:** [@stav](https://discourse.nodered.org/u/stav)\
**Replies:** 4\
**Last updated:** [24 June 2021 11:41 UTC](https://discourse.nodered.org/t/conflicts-between-mongodb-and-bluemix-nodes/47544 "2021-06-24T11:41:52Z")

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Hi to all. I am trying to use MongoDB in my application, and I need to use the node-red-node-mongodb. However, I get a conflict with node-red-bluemix-nodes which I can't deactivate or uninstall. I have deleted and disa…

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## [node-Red deactivate flows](https://discourse.nodered.org/t/node-red-deactivate-flows/47550)

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**Author:** [@automati](https://discourse.nodered.org/u/automati)\
**Replies:** 1\
**Last updated:** [24 June 2021 10:26 UTC](https://discourse.nodered.org/t/node-red-deactivate-flows/47550 "2021-06-24T10:26:58Z")

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hello everyone, is there a way to deactivate individual flows with a command? so that I can automatically deactivate and reactivate it ..?

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