# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=554

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

**Page:** 555

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## [I2C-bus install fail - RPI Zero W](https://discourse.nodered.org/t/i2c-bus-install-fail-rpi-zero-w/45713)

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**Author:** [@Zodiac-69](https://discourse.nodered.org/u/Zodiac-69)\
**Replies:** 9\
**Last updated:** [16 May 2021 14:46 UTC](https://discourse.nodered.org/t/i2c-bus-install-fail-rpi-zero-w/45713 "2021-05-16T14:46:44Z")

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I have a RPI Zero W with Node-RED. I am trying to install i2c-oled and it failed. I then tried other nodes and any node that use i2c-bus fail to install. I have confirmed that the hardware works by using i2cdetect -y 1…

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## [No multiple topics](https://discourse.nodered.org/t/no-multiple-topics/45718)

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**Author:** [@Crashy77](https://discourse.nodered.org/u/Crashy77)\
**Replies:** 16\
**Last updated:** [16 May 2021 14:24 UTC](https://discourse.nodered.org/t/no-multiple-topics/45718 "2021-05-16T14:24:17Z")

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Hi. I´m pretty new in Node-Red, but I´m trying to understand it better every day. Actually I want to transfer MQTT of my heat pump to my PLC with ADS. But I don´t want to use 100´s of MQTT nodes, just only one with /#…

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## [Scheduling monthly tasks](https://discourse.nodered.org/t/scheduling-monthly-tasks/13959)

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**Author:** [@biz](https://discourse.nodered.org/u/biz)\
**Replies:** 11\
**Last updated:** [16 May 2021 13:36 UTC](https://discourse.nodered.org/t/scheduling-monthly-tasks/13959 "2021-05-16T13:36:15Z")

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So I have a problem scheduling items. There are two mains nodes I have found to do 99% of my scheduling Bigtimer and schedx. Both are great. HOWEVER these are more for daily/weekly tasks. Is there any node out there tha…

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## [Dark theme not working for me](https://discourse.nodered.org/t/dark-theme-not-working-for-me/45712)

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**Author:** [@AsHex\_66](https://discourse.nodered.org/u/AsHex_66)\
**Replies:** 10\
**Last updated:** [16 May 2021 11:40 UTC](https://discourse.nodered.org/t/dark-theme-not-working-for-me/45712 "2021-05-16T11:40:57Z")

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All, Might just have one of those 'blond' moments on a Sunday night but cannot get the Dark Mode to work. I corrupted my Node-Red, so re-installed this. Installed @node-red-contrib-themes/dark - npm via NPM. Made the…

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## [I2c display not working](https://discourse.nodered.org/t/i2c-display-not-working/45701)

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**Author:** [@RogierQ](https://discourse.nodered.org/u/RogierQ)\
**Replies:** 5\
**Last updated:** [16 May 2021 11:18 UTC](https://discourse.nodered.org/t/i2c-display-not-working/45701 "2021-05-16T11:18:35Z")

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hey! i have a Chinese i2c display link to display when i run i2cdetect -y 1 i get this gives me 3c?? what is my address then? when i enter 3c nr crashes. What is want to do is display some text on the 128x64 di…

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## [SQLite Install from Manage Palette](https://discourse.nodered.org/t/sqlite-install-from-manage-palette/45457)

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**Author:** [@FrensisX99](https://discourse.nodered.org/u/FrensisX99)\
**Replies:** 17\
**Last updated:** [15 May 2021 20:41 UTC](https://discourse.nodered.org/t/sqlite-install-from-manage-palette/45457 "2021-05-15T20:41:07Z")

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I am trying to install sqlite from the manage palette of my node red but for some reason is shows an error. I am still new to this so I dont have a lot of experience on how to fix it so if possible please be as detailed …

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## [Circadian Lighting with Hue](https://discourse.nodered.org/t/circadian-lighting-with-hue/45695)

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**Author:** [@derail\_green](https://discourse.nodered.org/u/derail_green)\
**Replies:** 0\
**Last updated:** [15 May 2021 19:41 UTC](https://discourse.nodered.org/t/circadian-lighting-with-hue/45695 "2021-05-15T19:41:21Z")

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Brand new to node-red... installed last night on my RPi 4 that also runs Homebridge and Pi-hole. I read a post a while back on Reddit where someone mentioned how they used node-red to control Adaptive Lighting. Intrigue…

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## [Хочу анимированные Flow - Want Animated Flow](https://discourse.nodered.org/t/flow-want-animated-flow/45391)

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**Author:** [@AndrewEvMailRu](https://discourse.nodered.org/u/AndrewEvMailRu)\
**Replies:** 13\
**Last updated:** [15 May 2021 19:28 UTC](https://discourse.nodered.org/t/flow-want-animated-flow/45391 "2021-05-15T19:28:36Z")

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Как в Total.js

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## [Adjust values from the pressure sensor with Node?](https://discourse.nodered.org/t/adjust-values-from-the-pressure-sensor-with-node/45674)

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**Author:** [@pinie\_pinie](https://discourse.nodered.org/u/pinie_pinie)\
**Replies:** 12\
**Last updated:** [15 May 2021 14:30 UTC](https://discourse.nodered.org/t/adjust-values-from-the-pressure-sensor-with-node/45674 "2021-05-15T14:30:08Z")

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Hello, I use a digital pressure sensor in my irrigation system. Unfortunately, its measurement results are not linear. I have to adjust the values mathematically. I can't get any further with the "range node". Is there …

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## [Unwanted nodered restart](https://discourse.nodered.org/t/unwanted-nodered-restart/45677)

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**Author:** [@Arnaudd78000](https://discourse.nodered.org/u/Arnaudd78000)\
**Replies:** 8\
**Last updated:** [15 May 2021 14:03 UTC](https://discourse.nodered.org/t/unwanted-nodered-restart/45677 "2021-05-15T14:03:34Z")

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Hello everyone, it seems that my Node-Red is restarting in an unwanted way. That makes me unhappy, because it clears all chart data and history. It runs on a raspian with a Raspi4. After a restart, I've got : node-re…

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## [Calculations HTTP Request received data string](https://discourse.nodered.org/t/calculations-http-request-received-data-string/45679)

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**Author:** [@HaVi](https://discourse.nodered.org/u/HaVi)\
**Replies:** 2\
**Last updated:** [15 May 2021 12:59 UTC](https://discourse.nodered.org/t/calculations-http-request-received-data-string/45679 "2021-05-15T12:59:30Z")

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Because I have little experience with NodeRED, I run into a problem. With an HTTP Request I retrieve the data as in the graphic, a left column with 24 values and a right column with 24 times. I want to add the first 3 v…

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## [Write SMA Modbus Register](https://discourse.nodered.org/t/write-sma-modbus-register/45627)

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**Author:** [@Becker](https://discourse.nodered.org/u/Becker)\
**Replies:** 13\
**Last updated:** [15 May 2021 07:50 UTC](https://discourse.nodered.org/t/write-sma-modbus-register/45627 "2021-05-15T07:50:14Z")

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Hi, after a successful Modbus query (read) I wanted to venture into the next chapter, to write Modbus.. but I need some help: Modbus register 40016 defines Power value of inverter in W to provide (set-point): positive…

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## [Exec node output](https://discourse.nodered.org/t/exec-node-output/45620)

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**Author:** [@kenkoknz](https://discourse.nodered.org/u/kenkoknz)\
**Replies:** 7\
**Last updated:** [15 May 2021 07:32 UTC](https://discourse.nodered.org/t/exec-node-output/45620 "2021-05-15T07:32:36Z")

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Hi, linux noob, just mucking round with the exec node: Why does the payload of the command sometimes display human readable ascii string and sometimes hex: e.g with ls -a cmd, display a nice string of human readabl…

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## [Add local date and time to a CSV-file](https://discourse.nodered.org/t/add-local-date-and-time-to-a-csv-file/45658)

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**Author:** [@HaVi](https://discourse.nodered.org/u/HaVi)\
**Replies:** 6\
**Last updated:** [15 May 2021 07:25 UTC](https://discourse.nodered.org/t/add-local-date-and-time-to-a-csv-file/45658 "2021-05-15T07:25:29Z")

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My intention is to convert a measurement "luchtdruk" (pressure via MQTT) together with local date and time into a comma separated CSV file: date, time, pressure. As you can see in the graphic I use the Moment Node with …

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## [Using the node-red documented install script on RPi 3b but not getting the full node-red distribution installed](https://discourse.nodered.org/t/using-the-node-red-documented-install-script-on-rpi-3b-but-not-getting-the-full-node-red-distribution-installed/45672)

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**Author:** [@rigbone25](https://discourse.nodered.org/u/rigbone25)\
**Replies:** 2\
**Last updated:** [15 May 2021 02:13 UTC](https://discourse.nodered.org/t/using-the-node-red-documented-install-script-on-rpi-3b-but-not-getting-the-full-node-red-distribution-installed/45672 "2021-05-15T02:13:47Z")

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I used the node-red bash script documented here on a brand new Raspbian OS image for my Raspberry Pi 3b and the install went very smoothly. I didn't notice any error messages being thrown out. However, when accessing the…

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## [\[Solved\] Need help with math conversion](https://discourse.nodered.org/t/solved-need-help-with-math-conversion/45661)

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**Author:** [@007bond](https://discourse.nodered.org/u/007bond)\
**Replies:** 4\
**Last updated:** [14 May 2021 23:26 UTC](https://discourse.nodered.org/t/solved-need-help-with-math-conversion/45661 "2021-05-14T23:26:06Z")

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Sorry for the silly newbie questions. OK so I am getting milliamps and I want amps displayed on my dashboard. So I use a function node with this and all works great. var o = msg.payload msg.payload = msg.payload / 10…

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## [Can a google assistant routine be triggered from node-red?](https://discourse.nodered.org/t/can-a-google-assistant-routine-be-triggered-from-node-red/45670)

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**Author:** [@gadget](https://discourse.nodered.org/u/gadget)\
**Replies:** 0\
**Last updated:** [14 May 2021 22:54 UTC](https://discourse.nodered.org/t/can-a-google-assistant-routine-be-triggered-from-node-red/45670 "2021-05-14T22:54:36Z")

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As per the title. I've got a nest hub for which for I would like to programmatically turn off the display when not in use. I can either issue a voice command or use a set routine to do this. But I'm wondering - if there…

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## [How to limit temp display on dashboard to 2 decimals](https://discourse.nodered.org/t/how-to-limit-temp-display-on-dashboard-to-2-decimals/45622)

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**Author:** [@007bond](https://discourse.nodered.org/u/007bond)\
**Replies:** 17\
**Last updated:** [14 May 2021 22:52 UTC](https://discourse.nodered.org/t/how-to-limit-temp-display-on-dashboard-to-2-decimals/45622 "2021-05-14T22:52:06Z")

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New so maybe this is simple but I can't seem to figure it out or find it anywhere. I am reading temperature via MQTT the msg comes as 10th degree C. I want it displayed on my dashboard in F. So first I convert the 10th …

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## [How to convert payload object to array of elements](https://discourse.nodered.org/t/how-to-convert-payload-object-to-array-of-elements/45665)

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**Author:** [@rafterkai](https://discourse.nodered.org/u/rafterkai)\
**Replies:** 4\
**Last updated:** [14 May 2021 21:27 UTC](https://discourse.nodered.org/t/how-to-convert-payload-object-to-array-of-elements/45665 "2021-05-14T21:27:41Z")

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I'm not sure if the title correctly dictates what i need and i'm sorry if this something simple to do but i have no experience with javascript or coding and i'm fairly new to node red. Here's an example of what i'm tryi…

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## [Docker Exec node & automatic update?](https://discourse.nodered.org/t/docker-exec-node-automatic-update/45259)

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**Author:** [@Jean-Luc](https://discourse.nodered.org/u/Jean-Luc)\
**Replies:** 4\
**Last updated:** [14 May 2021 20:55 UTC](https://discourse.nodered.org/t/docker-exec-node-automatic-update/45259 "2021-05-14T20:55:42Z")

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Hello, When NR is running in a container, it is no longer possible to launch the node EXEC to run the command by exemple "sudo systemctl restart nodered" or "node-red-restart" as it is possible with a standard installa…

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## [Plug 'n' play of sub-flows](https://discourse.nodered.org/t/plug-n-play-of-sub-flows/45669)

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**Author:** [@augjoh](https://discourse.nodered.org/u/augjoh)\
**Replies:** 0\
**Last updated:** [14 May 2021 20:49 UTC](https://discourse.nodered.org/t/plug-n-play-of-sub-flows/45669 "2021-05-14T20:49:41Z")

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Given the following flow: I would like to replace the Standard subflow with different subflow modules (as described here: Packaging a Subflow as a module : Node-RED) for different installations of the same flows.json/…

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## [Message formatting from JSON to Object/Array](https://discourse.nodered.org/t/message-formatting-from-json-to-object-array/45657)

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**Author:** [@DuncanCT](https://discourse.nodered.org/u/DuncanCT)\
**Replies:** 9\
**Last updated:** [14 May 2021 20:48 UTC](https://discourse.nodered.org/t/message-formatting-from-json-to-object-array/45657 "2021-05-14T20:48:04Z")

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Warning this isn't going to be pretty, I pretty sure non of my terminology will be correct. Don't think it needs saying but I don't really know what I'm doing. I'm trying to convert a message from JSON to Object/Array? …

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## [Node-red 1.3.1 no open chrome](https://discourse.nodered.org/t/node-red-1-3-1-no-open-chrome/43931)

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**Author:** [@monroyhd](https://discourse.nodered.org/u/monroyhd)\
**Replies:** 6\
**Last updated:** [14 May 2021 19:31 UTC](https://discourse.nodered.org/t/node-red-1-3-1-no-open-chrome/43931 "2021-05-14T19:31:28Z")

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Hi, Node-red 1.3.1 not open in google chrome, this error view: red.min.js: Uncaught TypeError: e.trim is not a function in macmini M1

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## [Loadbalance/toggle messages](https://discourse.nodered.org/t/loadbalance-toggle-messages/45514)

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**Author:** [@coen17st](https://discourse.nodered.org/u/coen17st)\
**Replies:** 10\
**Last updated:** [14 May 2021 15:25 UTC](https://discourse.nodered.org/t/loadbalance-toggle-messages/45514 "2021-05-14T15:25:55Z")

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Hi, I would like every incoming message (from HTTP listner) to alternate routes in my flow. For example first message -\> direction A seconde message -\> direction B third message -\> direc…

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## [Combine strings from multiple inputs](https://discourse.nodered.org/t/combine-strings-from-multiple-inputs/45637)

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**Author:** [@radjesth](https://discourse.nodered.org/u/radjesth)\
**Replies:** 13\
**Last updated:** [14 May 2021 14:53 UTC](https://discourse.nodered.org/t/combine-strings-from-multiple-inputs/45637 "2021-05-14T14:53:06Z")

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Hello experts, I am an PLC engineer whith lots of experience in programming code for machines. Node red however, is not my cup of tea. Things which are easy for you, takes me a lot of time to think about. I have a st…

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## [Google NORA down?](https://discourse.nodered.org/t/google-nora-down/44224)

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**Author:** [@leftymuller](https://discourse.nodered.org/u/leftymuller)\
**Replies:** 26\
**Last updated:** [14 May 2021 14:21 UTC](https://discourse.nodered.org/t/google-nora-down/44224 "2021-05-14T14:21:57Z")

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NORA down and out ? can anybody confirm?

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## [Unable to send text\_link from telegram bot](https://discourse.nodered.org/t/unable-to-send-text-link-from-telegram-bot/45615)

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**Author:** [@Ozero](https://discourse.nodered.org/u/Ozero)\
**Replies:** 8\
**Last updated:** [14 May 2021 13:16 UTC](https://discourse.nodered.org/t/unable-to-send-text-link-from-telegram-bot/45615 "2021-05-14T13:16:43Z")

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I'm working on a RPi Zero W based doorbell camera, that sends a picture with a caption via a telegram bot. Sending the pictures with a text only caption works flawlessly. However, I would like to include a text link to t…

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## [Passing 2 generated variables in msg.payload as strings](https://discourse.nodered.org/t/passing-2-generated-variables-in-msg-payload-as-strings/45616)

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**Author:** [@krisbarb](https://discourse.nodered.org/u/krisbarb)\
**Replies:** 10\
**Last updated:** [14 May 2021 13:22 UTC](https://discourse.nodered.org/t/passing-2-generated-variables-in-msg-payload-as-strings/45616 "2021-05-14T13:22:33Z")

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Hi all, I am new here, so please excuse me if i'm posting this in the wrong topic. I am using node-red to interface with my blockchain and need to pass the following arguments: \[2021-05-13T22:29:44.150\] \[DEBUG\] BasicN…

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## [Parse JSON payload from Influx DB Query](https://discourse.nodered.org/t/parse-json-payload-from-influx-db-query/45635)

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**Author:** [@crazykong](https://discourse.nodered.org/u/crazykong)\
**Replies:** 8\
**Last updated:** [14 May 2021 10:37 UTC](https://discourse.nodered.org/t/parse-json-payload-from-influx-db-query/45635 "2021-05-14T10:37:04Z")

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Hello Guys, Just starting out on my Node Red journey and trying to build an intelligent solar PV switch and data logger. Switch and data logger is working fine. I'm using Influx DB to log, on a Pi Hassio platform. But…

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## [IncomingMessage](https://discourse.nodered.org/t/incomingmessage/45595)

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**Author:** [@Lucas.Horst](https://discourse.nodered.org/u/Lucas.Horst)\
**Replies:** 1\
**Last updated:** [14 May 2021 07:43 UTC](https://discourse.nodered.org/t/incomingmessage/45595 "2021-05-14T07:43:33Z")

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O node-red estava funcionando ok mas derrepente começou a ocorrer este erro abaixo, isto quando faço deploy. Alguem pode me dizer o que pode estar acontecendo.. And this error is intermittent, that is, there is a deploy …

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