# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=625

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

**Page:** 626

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## [BigData side-channel?](https://discourse.nodered.org/t/bigdata-side-channel/38862)

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**Author:** [@mstormo](https://discourse.nodered.org/u/mstormo)\
**Replies:** 0\
**Last updated:** [9 January 2021 20:00 UTC](https://discourse.nodered.org/t/bigdata-side-channel/38862 "2021-01-09T20:00:21Z")

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We have a compute framework which is designed to process TBs of data in real-time. This compute framework uses a DAG, so it fits into the flow of Node-Red. Now, I do not intend Node-Red to process TBs of data in real tim…

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## [Update frist object with second object in function](https://discourse.nodered.org/t/update-frist-object-with-second-object-in-function/38842)

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**Author:** [@zanmange](https://discourse.nodered.org/u/zanmange)\
**Replies:** 2\
**Last updated:** [9 January 2021 18:08 UTC](https://discourse.nodered.org/t/update-frist-object-with-second-object-in-function/38842 "2021-01-09T18:08:54Z")

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first objet {"8f67e148-87f5-4b89-a02d-2865de575e36":{"bicycle":0,"person":0,"truck":0,"motorbike":0,"car":0,"bus":0},"392bf75c-dd21-40c2-83b9-a22ef5a4b094":{"bicycle":0,"person":0,"truck":0,"motorbike":0,"car":0,"bus":0…

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## [Combine more than one msg.payload in one msg.payload](https://discourse.nodered.org/t/combine-more-than-one-msg-payload-in-one-msg-payload/38835)

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**Author:** [@badr\_al\_moragab](https://discourse.nodered.org/u/badr_al_moragab)\
**Replies:** 2\
**Last updated:** [9 January 2021 16:23 UTC](https://discourse.nodered.org/t/combine-more-than-one-msg-payload-in-one-msg-payload/38835 "2021-01-09T16:23:00Z")

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Hello I'm student and I'm doing my final year project I need your help to combine three msg.payload to one msg.payload to send it { temperature: msg.payload 2 °C humidity: msg.payload 1 °C weatherState: msg.payload 3…

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## [Pre-populate drop down dashboard node](https://discourse.nodered.org/t/pre-populate-drop-down-dashboard-node/38844)

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**Author:** [@shel](https://discourse.nodered.org/u/shel)\
**Replies:** 11\
**Last updated:** [9 January 2021 15:25 UTC](https://discourse.nodered.org/t/pre-populate-drop-down-dashboard-node/38844 "2021-01-09T15:25:02Z")

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in one of my flows I want to use the dashboard drop down node (ui\_dropdown) to select a number from 1 to 45. After the number is selected it is then read to flow.set to preserve that number across reboots. The help panel…

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## [Convert Bytes to integer](https://discourse.nodered.org/t/convert-bytes-to-integer/15153)

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**Author:** [@injector22](https://discourse.nodered.org/u/injector22)\
**Replies:** 14\
**Last updated:** [9 January 2021 13:31 UTC](https://discourse.nodered.org/t/convert-bytes-to-integer/15153 "2021-01-09T13:31:47Z")

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I have a battery controller that sends UDP packets with the stats on the battery. Using the UDP node I was able to capture the packet but I'm not exactly sure how I would go about converting the Bytes to integers. Docum…

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## [How to Stop a function node from execution its following code?](https://discourse.nodered.org/t/how-to-stop-a-function-node-from-execution-its-following-code/38828)

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**Author:** [@nicedevil](https://discourse.nodered.org/u/nicedevil)\
**Replies:** 4\
**Last updated:** [9 January 2021 09:55 UTC](https://discourse.nodered.org/t/how-to-stop-a-function-node-from-execution-its-following-code/38828 "2021-01-09T09:55:07Z")

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Heya, I want to stop a function node from executing its code if a payload is f.e. not a number. Is there anything like "node.stop" or "node.break"? I can't filter this in a node beforehand because there are more messa…

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## [Node-Red with camera FLIR Lepton](https://discourse.nodered.org/t/node-red-with-camera-flir-lepton/38801)

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**Author:** [@NicoleYhoal2020](https://discourse.nodered.org/u/NicoleYhoal2020)\
**Replies:** 1\
**Last updated:** [9 January 2021 07:25 UTC](https://discourse.nodered.org/t/node-red-with-camera-flir-lepton/38801 "2021-01-09T07:25:24Z")

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Hello everyone, I have a FLIR lepton 2.5 camera and a Raspberry Pi with which I want to develop a graphical interface to monitor an electrical system through IoT. This camera has the Pylepton library, which will allow me…

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## [Node-red contrib pythonshell](https://discourse.nodered.org/t/node-red-contrib-pythonshell/38809)

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**Author:** [@Miliano](https://discourse.nodered.org/u/Miliano)\
**Replies:** 4\
**Last updated:** [9 January 2021 06:49 UTC](https://discourse.nodered.org/t/node-red-contrib-pythonshell/38809 "2021-01-09T06:49:56Z")

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Hello everybody :slight\_smile: Please, I need your help! I want to start a python3 script from a node. For this I installed "node-red-contrib-pythonshell", works well with an easy script, but now i want to import "req…

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## [Nodemcu cannot connect to mqtt](https://discourse.nodered.org/t/nodemcu-cannot-connect-to-mqtt/38384)

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**Author:** [@sam\_r](https://discourse.nodered.org/u/sam_r)\
**Replies:** 70\
**Last updated:** [9 January 2021 01:11 UTC](https://discourse.nodered.org/t/nodemcu-cannot-connect-to-mqtt/38384 "2021-01-09T01:11:47Z")

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I am new to nodered and mqtt , i follow all the steps shows on youtube videos to connect nodemcu to nodered via mqtt broker but failed. kindly see the attached pictures .. The Nodered is running on windows 10 laptop M…

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## [Node names, "conflicts" and finding nodes used](https://discourse.nodered.org/t/node-names-conflicts-and-finding-nodes-used/38818)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 1\
**Last updated:** [8 January 2021 22:35 UTC](https://discourse.nodered.org/t/node-names-conflicts-and-finding-nodes-used/38818 "2021-01-08T22:35:39Z")

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Yes, shame on me for not paying more attention. I have (alas) got myself where I have two three kinds of node that do similar things. In vein, I am hoping I haven't used all three types. But I can't (don't seem able…

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## [3 temperature Output calculate AVG](https://discourse.nodered.org/t/3-temperature-output-calculate-avg/38806)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 6\
**Last updated:** [8 January 2021 22:02 UTC](https://discourse.nodered.org/t/3-temperature-output-calculate-avg/38806 "2021-01-08T22:02:20Z")

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Hello i have this script \[{"id":"88e25ccc.26438","type":"inject","z":"3ddc05.29f503fc","name":"20min","props":\[{"p":"payload"},{"p":"topic","vt":"str"}\],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"",…

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## [SHT3X node anywhere?](https://discourse.nodered.org/t/sht3x-node-anywhere/38175)

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**Author:** [@zoppolig](https://discourse.nodered.org/u/zoppolig)\
**Replies:** 5\
**Last updated:** [8 January 2021 22:04 UTC](https://discourse.nodered.org/t/sht3x-node-anywhere/38175 "2021-01-08T22:04:42Z")

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Hi I'm a newbie. I saw a thread on node-red support to SHT3X Sensirion humi/temp sensors on Raspberry via I2C, but nothing was made available and I cannot find anything around. Any suggestion? Thanks in advance

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## [Websocket comms error](https://discourse.nodered.org/t/websocket-comms-error/38802)

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**Author:** [@ljpaff](https://discourse.nodered.org/u/ljpaff)\
**Replies:** 2\
**Last updated:** [8 January 2021 21:45 UTC](https://discourse.nodered.org/t/websocket-comms-error/38802 "2021-01-08T21:45:55Z")

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Hi all, i have upgrade nodered and nginx reverse proxy and with my configuration that was working for redirecting traffic by nginx has stopped working. I am getting this error in access.log: 08/Jan/2021:17:32:46 +010…

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## [Can Ui Builder be installed on IBM Cloud Node-RED?](https://discourse.nodered.org/t/can-ui-builder-be-installed-on-ibm-cloud-node-red/38805)

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**Author:** [@Vinnyvangogo](https://discourse.nodered.org/u/Vinnyvangogo)\
**Replies:** 1\
**Last updated:** [8 January 2021 20:17 UTC](https://discourse.nodered.org/t/can-ui-builder-be-installed-on-ibm-cloud-node-red/38805 "2021-01-08T20:17:43Z")

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Has anyone installed Ui Builder on a IBM Cloud Node-RED? Is so, how did you do it?

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## [Project Haystack node](https://discourse.nodered.org/t/project-haystack-node/38804)

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**Author:** [@Chrisirwin](https://discourse.nodered.org/u/Chrisirwin)\
**Replies:** 0\
**Last updated:** [8 January 2021 17:47 UTC](https://discourse.nodered.org/t/project-haystack-node/38804 "2021-01-08T17:47:22Z")

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Is anyone working on creating a Node-Red interface to the Haystack over REST protocol? Project Haystack is an open standard for semantic tagging and data-modelling of building-related data - see project-haystack.org. the…

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## [Simple settimeout function](https://discourse.nodered.org/t/simple-settimeout-function/38721)

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**Author:** [@Winni](https://discourse.nodered.org/u/Winni)\
**Replies:** 24\
**Last updated:** [8 January 2021 15:22 UTC](https://discourse.nodered.org/t/simple-settimeout-function/38721 "2021-01-08T15:22:15Z")

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Hello everyone, i´m super happy with my nooby progress on Node-Red but now my almost non existent programming skills come in to effect :frowning: I´m getting the state of my door sensor from Homebridge (ContactSensorSt…

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## [Switch node-red losing data](https://discourse.nodered.org/t/switch-node-red-losing-data/38783)

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**Author:** [@marconr9](https://discourse.nodered.org/u/marconr9)\
**Replies:** 6\
**Last updated:** [8 January 2021 15:12 UTC](https://discourse.nodered.org/t/switch-node-red-losing-data/38783 "2021-01-08T15:12:48Z")

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I have a question. There is data coming from my Domoticz system. My flow is working every day with a timer. Not every day i have to need to run that flow. Now i wanted to make a switch between json node and the timer…

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## [How to automatically change file name based in a variable "job number"](https://discourse.nodered.org/t/how-to-automatically-change-file-name-based-in-a-variable-job-number/38723)

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**Author:** [@jjam89031](https://discourse.nodered.org/u/jjam89031)\
**Replies:** 4\
**Last updated:** [7 January 2021 21:54 UTC](https://discourse.nodered.org/t/how-to-automatically-change-file-name-based-in-a-variable-job-number/38723 "2021-01-07T21:54:49Z")

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I have my flow collecting a "job number" and other data automatically from a machine, all converted into a CSV using the CSV node and feed to an SMB node to create an Excell file in a shared drive in a server automatical…

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## [Adding temp and humidity to influxdb](https://discourse.nodered.org/t/adding-temp-and-humidity-to-influxdb/38677)

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**Author:** [@jfabernathy](https://discourse.nodered.org/u/jfabernathy)\
**Replies:** 22\
**Last updated:** [8 January 2021 14:52 UTC](https://discourse.nodered.org/t/adding-temp-and-humidity-to-influxdb/38677 "2021-01-08T14:52:55Z")

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I've searched a lot and have not hit on what I need yet. I have a Raspberry Pi reading a sensor and sending temperature and humidity readings using MQTT to another RPI which is the Mosqitto Broker and node-red server. …

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## [MQTT Time Stamp Error](https://discourse.nodered.org/t/mqtt-time-stamp-error/38787)

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**Author:** [@MarcoVg](https://discourse.nodered.org/u/MarcoVg)\
**Replies:** 7\
**Last updated:** [8 January 2021 14:06 UTC](https://discourse.nodered.org/t/mqtt-time-stamp-error/38787 "2021-01-08T14:06:39Z")

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Dear to All, I am receive from a Mqqt Broker a correct Json Object. But I have attached error about the time stamp. What is it mean?

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## [Out influx 1x vs 1.8](https://discourse.nodered.org/t/out-influx-1x-vs-1-8/38784)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 4\
**Last updated:** [8 January 2021 13:59 UTC](https://discourse.nodered.org/t/out-influx-1x-vs-1-8/38784 "2021-01-08T13:59:05Z")

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hello i do some output of datas into influx 1.x which works fine! what more should be done to select influx 1.8? because selecting 1.8 the data are not added, but also no error! have a nice day vinc

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## [Manage Polling Error Telegram](https://discourse.nodered.org/t/manage-polling-error-telegram/38699)

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**Author:** [@MarcoVg](https://discourse.nodered.org/u/MarcoVg)\
**Replies:** 8\
**Last updated:** [8 January 2021 12:41 UTC](https://discourse.nodered.org/t/manage-polling-error-telegram/38699 "2021-01-08T12:41:48Z")

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Dear All, There is some command for read and check the polling status/error for telegram Function ? Regards,

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## [String type difference](https://discourse.nodered.org/t/string-type-difference/38779)

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**Author:** [@PiMo131](https://discourse.nodered.org/u/PiMo131)\
**Replies:** 10\
**Last updated:** [8 January 2021 12:27 UTC](https://discourse.nodered.org/t/string-type-difference/38779 "2021-01-08T12:27:09Z")

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Hello, I am trying to combine the data from several Serial \> TCP servers (lantronix Xport) in to a single TCP server (node-red). For some reason when I make an inject node to send a string it differs from the string I …

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## [powerMeter seconds into date](https://discourse.nodered.org/t/powermeter-seconds-into-date/38747)

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**Author:** [@vikozo](https://discourse.nodered.org/u/vikozo)\
**Replies:** 1\
**Last updated:** [8 January 2021 10:36 UTC](https://discourse.nodered.org/t/powermeter-seconds-into-date/38747 "2021-01-08T10:36:17Z")

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hello i have a powerMeter it counts up with the used power and a second value is a number which are seconds. in Grafana i show this PowerInformation and also calculate the Price used since the Counter started! This wo…

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## [Function node simple math operation?](https://discourse.nodered.org/t/function-node-simple-math-operation/8779)

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**Author:** [@Stefanie](https://discourse.nodered.org/u/Stefanie)\
**Replies:** 18\
**Last updated:** [8 January 2021 10:05 UTC](https://discourse.nodered.org/t/function-node-simple-math-operation/8779 "2021-01-08T10:05:43Z")

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Hi, new here and to node-red. I've got a sense hat for my Pi 3b+ and want to add a simple minus operation to the temperature sensor on the hat as kind of a correction factor. Basically (temperature - 5) = CorrectedTemp…

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## [In template(not the dashboard one), payload not refresh](https://discourse.nodered.org/t/in-template-not-the-dashboard-one-payload-not-refresh/38767)

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**Author:** [@kihararuntu](https://discourse.nodered.org/u/kihararuntu)\
**Replies:** 2\
**Last updated:** [8 January 2021 09:28 UTC](https://discourse.nodered.org/t/in-template-not-the-dashboard-one-payload-not-refresh/38767 "2021-01-08T09:28:10Z")

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with a debug node, I can see the function node is outputting different values, but in the template's JS, every time it comes with same value.

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## [Real-time Average Chart](https://discourse.nodered.org/t/real-time-average-chart/38695)

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**Author:** [@doomdanger](https://discourse.nodered.org/u/doomdanger)\
**Replies:** 8\
**Last updated:** [8 January 2021 05:29 UTC](https://discourse.nodered.org/t/real-time-average-chart/38695 "2021-01-08T05:29:45Z")

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Hello I'm a newby in this situation and have problems to create a chart. How can I create a real-time average chart to show average from now on and go back to every 24 hours for a week. I try to use "node-red-contrib…

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## [LIFX Switch Relay Control](https://discourse.nodered.org/t/lifx-switch-relay-control/37592)

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**Author:** [@bkdfkup](https://discourse.nodered.org/u/bkdfkup)\
**Replies:** 1\
**Last updated:** [8 January 2021 06:44 UTC](https://discourse.nodered.org/t/lifx-switch-relay-control/37592 "2021-01-08T06:44:12Z")

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Hi all! I have just expanded my LIFX lighting to include the new LIFX Switch, to allow the control of "dumb" lighting via the built in 240v relays. The switch works great, and via the node-red-contrib-lifx-api node col…

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## [More an O/S question, but I would like to ask here](https://discourse.nodered.org/t/more-an-o-s-question-but-i-would-like-to-ask-here/38763)

<div class="topic-metadata">

**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 0\
**Last updated:** [8 January 2021 00:12 UTC](https://discourse.nodered.org/t/more-an-o-s-question-but-i-would-like-to-ask-here/38763 "2021-01-08T00:12:03Z")

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I have a RasPi and a USB stick plugged into it for logging. A 128 MG stick. (Yeah: old) I have fs-ops installed and I run a command daily to indicate the used/available space on the stick. Today the machine has been …

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## [Time taken to set a global variable?](https://discourse.nodered.org/t/time-taken-to-set-a-global-variable/38737)

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**Author:** [@Sean-McG](https://discourse.nodered.org/u/Sean-McG)\
**Replies:** 3\
**Last updated:** [7 January 2021 23:34 UTC](https://discourse.nodered.org/t/time-taken-to-set-a-global-variable/38737 "2021-01-07T23:34:21Z")

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Hi all, I have a change node which sets a global variable, the message then goes on to a function which reads that variable. It seems that the message gets to the function before the variable is set. i.e. the new value …

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