# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=30

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

**Page:** 31

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## [Motion Sensor, false reads, sensitivity calibration](https://discourse.nodered.org/t/motion-sensor-false-reads-sensitivity-calibration/98369)

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**Author:** [@richiep](https://discourse.nodered.org/u/richiep)\
**Replies:** 2\
**Last updated:** [30 July 2025 07:33 UTC](https://discourse.nodered.org/t/motion-sensor-false-reads-sensitivity-calibration/98369 "2025-07-30T07:33:59Z")

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Hey all, I’m running an esp8266 with an infrared motion sensor. I’ve been running these in my projects for years. I use these mostly inside but I have one outside that regularly gives false reads. I have the sensitiv…

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## [Disable default node](https://discourse.nodered.org/t/disable-default-node/98378)

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**Author:** [@czzhao95](https://discourse.nodered.org/u/czzhao95)\
**Replies:** 1\
**Last updated:** [30 July 2025 06:46 UTC](https://discourse.nodered.org/t/disable-default-node/98378 "2025-07-30T06:46:52Z")

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I want to disable some of the default nodes, such as exec, so they don't appear in the node palette on the left. How can I do that?

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## [Use Grafana to graph motion sensor triggers](https://discourse.nodered.org/t/use-grafana-to-graph-motion-sensor-triggers/98370)

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**Author:** [@richiep](https://discourse.nodered.org/u/richiep)\
**Replies:** 3\
**Last updated:** [30 July 2025 04:00 UTC](https://discourse.nodered.org/t/use-grafana-to-graph-motion-sensor-triggers/98370 "2025-07-30T04:00:38Z")

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I once saw how someone set up a Grafana display to show when a motion sensor was triggered over a 24 hour period. It was like an occupancy record. I can’t find it again. Has anyone done this? Or can someone point to …

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## [Installing Node-RED alongside Homebridge (pre-built image)](https://discourse.nodered.org/t/installing-node-red-alongside-homebridge-pre-built-image/98352)

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**Author:** [@rakgupta](https://discourse.nodered.org/u/rakgupta)\
**Replies:** 1\
**Last updated:** [29 July 2025 15:28 UTC](https://discourse.nodered.org/t/installing-node-red-alongside-homebridge-pre-built-image/98352 "2025-07-29T15:28:23Z")

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Hello: I'm trying to install Node-RED on a RPi5 alongside the prebuilt Homebridge image. Has anyone installed this successfully? If so, any pointers/guidance would be really appreciated. When I install using the RPi sc…

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## [Disable function code warning](https://discourse.nodered.org/t/disable-function-code-warning/98360)

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**Author:** [@remsfn](https://discourse.nodered.org/u/remsfn)\
**Replies:** 2\
**Last updated:** [29 July 2025 14:42 UTC](https://discourse.nodered.org/t/disable-function-code-warning/98360 "2025-07-29T14:42:36Z")

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I am using Node red V4.0.9 and the following code const delta\_ms = new Date() - new Date(machines\_buffer.timestamp); genrate a warning but do work! The left-hand side of an arithmetic operation must be of type 'any'…

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## [Question about the serial node](https://discourse.nodered.org/t/question-about-the-serial-node/98353)

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**Author:** [@andramalech](https://discourse.nodered.org/u/andramalech)\
**Replies:** 4\
**Last updated:** [29 July 2025 02:46 UTC](https://discourse.nodered.org/t/question-about-the-serial-node/98353 "2025-07-29T02:46:01Z")

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I am using the serial node to communicate over RS232 and I am getting additional characters in my string response. Would anyone have an idea of what these characters are and how to remove them? sample: 22.03

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## [Node Red starts mining Monero coins without my consent!](https://discourse.nodered.org/t/node-red-starts-mining-monero-coins-without-my-consent/98344)

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**Author:** [@devifast](https://discourse.nodered.org/u/devifast)\
**Replies:** 34\
**Last updated:** [28 July 2025 14:59 UTC](https://discourse.nodered.org/t/node-red-starts-mining-monero-coins-without-my-consent/98344 "2025-07-28T14:59:05Z")

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I noticed that Node red has started mining Monero cryptocurrency without my knowledge and permission. I remove the process in htop but after deploying the flow in Node red it reappears. How did this happen?

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## [2 sensor temperatures, I am lost how to get both values into a chart on Dashboard 1](https://discourse.nodered.org/t/2-sensor-temperatures-i-am-lost-how-to-get-both-values-into-a-chart-on-dashboard-1/98339)

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**Author:** [@questuk](https://discourse.nodered.org/u/questuk)\
**Replies:** 3\
**Last updated:** [28 July 2025 07:05 UTC](https://discourse.nodered.org/t/2-sensor-temperatures-i-am-lost-how-to-get-both-values-into-a-chart-on-dashboard-1/98339 "2025-07-28T07:05:19Z")

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I have tried for hours to get this to work, i want to plot 2 temperatures from an array I even tried AI which sent me down a ridiculous path !!! I am using Dasboard 1 My array that comes into Node-RED from 2 sensors {…

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## [How to make use a library (e.g. pdf.js) in uibuilder?](https://discourse.nodered.org/t/how-to-make-use-a-library-e-g-pdf-js-in-uibuilder/98247)

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**Author:** [@CreativeWarlock](https://discourse.nodered.org/u/CreativeWarlock)\
**Replies:** 4\
**Last updated:** [27 July 2025 23:01 UTC](https://discourse.nodered.org/t/how-to-make-use-a-library-e-g-pdf-js-in-uibuilder/98247 "2025-07-27T23:01:42Z")

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Just a quick question: The uibuilder node here points to '../uibuilder/vendor/vue' folder, but after searching it in my entire /data folder neither a vendor, nor a vue folder is to be found. So, how in the world doe…

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## [Share Your Experience: Short Survey on Low-Code Platforms](https://discourse.nodered.org/t/share-your-experience-short-survey-on-low-code-platforms/98294)

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**Author:** [@rayan\_k828136](https://discourse.nodered.org/u/rayan_k828136)\
**Replies:** 13\
**Last updated:** [27 July 2025 12:15 UTC](https://discourse.nodered.org/t/share-your-experience-short-survey-on-low-code-platforms/98294 "2025-07-27T12:15:35Z")

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Hi everyone! I’m currently doing a short research survey on Low-Code and No-Code Development Platforms (LCDPs) — tools that let us build apps, websites, or automations with minimal coding using visual interfaces and wor…

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## [Unable to Access uibuilder Node Pages](https://discourse.nodered.org/t/unable-to-access-uibuilder-node-pages/98278)

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**Author:** [@Buckskin](https://discourse.nodered.org/u/Buckskin)\
**Replies:** 8\
**Last updated:** [26 July 2025 16:18 UTC](https://discourse.nodered.org/t/unable-to-access-uibuilder-node-pages/98278 "2025-07-26T16:18:04Z")

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I have obviously messed something up but since upgrading to uiBuilder v 7.4 ( I think) - currently on 7.4.3 - all I get when clicking on open is a blank page with the error message along the top Cannot GET /\<name of page\>…

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## [Function not passing message payload](https://discourse.nodered.org/t/function-not-passing-message-payload/98302)

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**Author:** [@Blawesome](https://discourse.nodered.org/u/Blawesome)\
**Replies:** 7\
**Last updated:** [25 July 2025 18:38 UTC](https://discourse.nodered.org/t/function-not-passing-message-payload/98302 "2025-07-25T18:38:48Z")

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I am new to Node-RED in Home Assistant and am in need of some help with a function. I created a flow that starts our Roomba vacuum when the wife and have left the house and been away for 15 minutes. The initial flow se…

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## [Function Node send short Strings to PostgreSql?](https://discourse.nodered.org/t/function-node-send-short-strings-to-postgresql/98261)

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**Author:** [@Starfoxfs](https://discourse.nodered.org/u/Starfoxfs)\
**Replies:** 4\
**Last updated:** [25 July 2025 13:37 UTC](https://discourse.nodered.org/t/function-node-send-short-strings-to-postgresql/98261 "2025-07-25T13:37:38Z")

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Hi, I using a function Node to add my Strings to Postgresql: var totalkwh = msg.payload\["opendtu/yieldtotal"\]; var todaykwh = msg.payload\["opendtu/yieldday"\]; var voltage = msg.payload\["opendtu/voltage"\]; var ampere = …

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## [Debian Linux: Migrating from Bullseye to Bookworm](https://discourse.nodered.org/t/debian-linux-migrating-from-bullseye-to-bookworm/98263)

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**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 9\
**Last updated:** [25 July 2025 08:17 UTC](https://discourse.nodered.org/t/debian-linux-migrating-from-bullseye-to-bookworm/98263 "2025-07-25T08:17:20Z")

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Hi all, is anyone using Debian Bookworm with Node-RED and if so, did you have any issues? Having noticed that Bullseye Backports is now switched off and because Debian only supports in-place upgrades across a single ver…

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## [Extracting a value from a http request](https://discourse.nodered.org/t/extracting-a-value-from-a-http-request/98270)

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**Author:** [@Mikee1234K](https://discourse.nodered.org/u/Mikee1234K)\
**Replies:** 9\
**Last updated:** [24 July 2025 12:46 UTC](https://discourse.nodered.org/t/extracting-a-value-from-a-http-request/98270 "2025-07-24T12:46:53Z")

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I am trying to extract a value (string) obtained by a http request. This is the payload I am receiving (partially) \<?xml version="1.0" ?\> \<command\_result\> \<param name="protocol\_version" value="6"/\> \<param name="phv\_md5"…

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## [Problem with install node-red-contrib-mssql-plus](https://discourse.nodered.org/t/problem-with-install-node-red-contrib-mssql-plus/98286)

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**Author:** [@Oleg](https://discourse.nodered.org/u/Oleg)\
**Replies:** 7\
**Last updated:** [24 July 2025 08:12 UTC](https://discourse.nodered.org/t/problem-with-install-node-red-contrib-mssql-plus/98286 "2025-07-24T08:12:49Z")

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Hello, I have problem with install node-red-contrib-mssql-plus 2025-07-24T07:10:29.932Z npm install --no-audit --no-update-notifier --no-fund --save --save-prefix=~ --omit=dev --engine-strict node-red-contrib-mssql-plu…

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## [NATS communication with credential file as authentification](https://discourse.nodered.org/t/nats-communication-with-credential-file-as-authentification/98266)

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**Author:** [@KRR](https://discourse.nodered.org/u/KRR)\
**Replies:** 2\
**Last updated:** [24 July 2025 07:05 UTC](https://discourse.nodered.org/t/nats-communication-with-credential-file-as-authentification/98266 "2025-07-24T07:05:31Z")

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In a project i have to use NATS communication. For the authentification on the NATS-server a credential file (based on JWT) is used. The credential file should be stored on the docker container of NodeRed. With currently…

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## [The flow gets NaN after running once or twice](https://discourse.nodered.org/t/the-flow-gets-nan-after-running-once-or-twice/98268)

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**Author:** [@yusufscelik](https://discourse.nodered.org/u/yusufscelik)\
**Replies:** 10\
**Last updated:** [23 July 2025 16:06 UTC](https://discourse.nodered.org/t/the-flow-gets-nan-after-running-once-or-twice/98268 "2025-07-23T16:06:48Z")

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Hello guys. I have a problem with saving variables recently. I use Node-RED to build an Auto Page Sender as Telegram Bot, which automatically sends three pages of a book each day. The function node keeps track of the cu…

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## [What are you using node-red for besides iot?](https://discourse.nodered.org/t/what-are-you-using-node-red-for-besides-iot/98010)

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**Author:** [@AllanOricil](https://discourse.nodered.org/u/AllanOricil)\
**Replies:** 38\
**Last updated:** [23 July 2025 14:46 UTC](https://discourse.nodered.org/t/what-are-you-using-node-red-for-besides-iot/98010 "2025-07-23T14:46:39Z")

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What are you using node-red for besides iot?

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## [How to write a function to separate Data according to Hostname?](https://discourse.nodered.org/t/how-to-write-a-function-to-separate-data-according-to-hostname/98271)

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**Author:** [@niri](https://discourse.nodered.org/u/niri)\
**Replies:** 6\
**Last updated:** [23 July 2025 13:55 UTC](https://discourse.nodered.org/t/how-to-write-a-function-to-separate-data-according-to-hostname/98271 "2025-07-23T13:55:48Z")

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Hey Everyone, I am very new to node-red. I am building an IOT-Project for collecting temperatures. I have a JSON format Payload, which i want to sort according to Hostname and its given values before i pass it to Influx…

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## [How to access a Modbus TCP Device](https://discourse.nodered.org/t/how-to-access-a-modbus-tcp-device/98147)

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**Author:** [@Janvi](https://discourse.nodered.org/u/Janvi)\
**Replies:** 11\
**Last updated:** [23 July 2025 05:53 UTC](https://discourse.nodered.org/t/how-to-access-a-modbus-tcp-device/98147 "2025-07-23T05:53:43Z")

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Like to read the apparent power from my Ziehl EFR4001 device for visualisation in my dashboard. The device is in my local network accessible by http where I enable the Modbus TCP setup using Port 502. For NodeRed I i…

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## [TypeError: Cannot read properties of undefined (reading 'hasOwnProperty')](https://discourse.nodered.org/t/typeerror-cannot-read-properties-of-undefined-reading-hasownproperty/97867)

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**Author:** [@bigbean17](https://discourse.nodered.org/u/bigbean17)\
**Replies:** 5\
**Last updated:** [22 July 2025 22:38 UTC](https://discourse.nodered.org/t/typeerror-cannot-read-properties-of-undefined-reading-hasownproperty/97867 "2025-07-22T22:38:42Z")

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Hi all, I'm trying to deploy my Node-RED app (with projects enabled) using Docker, but I keep running into this error on first launch: TypeError: Cannot read properties of undefined (reading 'hasOwnProperty') My goal …

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## [MQTT still connecting](https://discourse.nodered.org/t/mqtt-still-connecting/98254)

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**Author:** [@HerrKrauss](https://discourse.nodered.org/u/HerrKrauss)\
**Replies:** 2\
**Last updated:** [22 July 2025 19:28 UTC](https://discourse.nodered.org/t/mqtt-still-connecting/98254 "2025-07-22T19:28:00Z")

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Hi, i have a raspberry pi with a module AI to recongnition of gender, this script send a JSON by mqtt, but want i try to catched, my node mqtt doesnt work in node-red. In the server spot i have the ip of the server web,…

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## [Status node not receiving any updates from InfluxDB out node](https://discourse.nodered.org/t/status-node-not-receiving-any-updates-from-influxdb-out-node/98242)

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**Author:** [@wescley](https://discourse.nodered.org/u/wescley)\
**Replies:** 3\
**Last updated:** [22 July 2025 12:54 UTC](https://discourse.nodered.org/t/status-node-not-receiving-any-updates-from-influxdb-out-node/98242 "2025-07-22T12:54:47Z")

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Hello everyone, I’m running Node-RED v3.x with the official InfluxDB Out node (InfluxDB 2.x). I’ve added a Status node and configured it to monitor any status change on my InfluxDB Out node, but I’m not seeing any statu…

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## [Weather data to database - GW1000A-WIFIC25F -\> ecowitt.net -\> how?](https://discourse.nodered.org/t/weather-data-to-database-gw1000a-wific25f-ecowitt-net-how/97740)

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**Author:** [@AndKe](https://discourse.nodered.org/u/AndKe)\
**Replies:** 5\
**Last updated:** [22 July 2025 13:23 UTC](https://discourse.nodered.org/t/weather-data-to-database-gw1000a-wific25f-ecowitt-net-how/97740 "2025-07-22T13:23:13Z")

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My weather station receives sensor data from GW1000A-WIFIC25F and sends it to ecowitt.net how can I get the rainfall data into NodeRed ?

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## [Other host as frontend nodered](https://discourse.nodered.org/t/other-host-as-frontend-nodered/98214)

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**Author:** [@MaximusPauls](https://discourse.nodered.org/u/MaximusPauls)\
**Replies:** 11\
**Last updated:** [22 July 2025 11:16 UTC](https://discourse.nodered.org/t/other-host-as-frontend-nodered/98214 "2025-07-22T11:16:53Z")

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Hi! I use node red as a small home automation. I want to show some things to the outside world (things like temperature values, graphs, buttons, slider), but at the same time not give access to the entire dashboard. I …

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## [A node that can be pressed to start/stop messages flow....?](https://discourse.nodered.org/t/a-node-that-can-be-pressed-to-start-stop-messages-flow/98164)

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**Author:** [@dougle03](https://discourse.nodered.org/u/dougle03)\
**Replies:** 14\
**Last updated:** [22 July 2025 09:14 UTC](https://discourse.nodered.org/t/a-node-that-can-be-pressed-to-start-stop-messages-flow/98164 "2025-07-22T09:14:06Z")

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Hi, I spend a lot of time in NodeRed find it time consuming to manually disable a node temporally when debugging. Is there a node that allows you to drop it into a flow and tap it to open or close the link it's on? A b…

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## [Mqtt Multiple Inputs to one Json Object or Array](https://discourse.nodered.org/t/mqtt-multiple-inputs-to-one-json-object-or-array/98244)

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**Author:** [@Starfoxfs](https://discourse.nodered.org/u/Starfoxfs)\
**Replies:** 3\
**Last updated:** [22 July 2025 07:58 UTC](https://discourse.nodered.org/t/mqtt-multiple-inputs-to-one-json-object-or-array/98244 "2025-07-22T07:58:29Z")

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Hi, i have a OpenDTU Mqtt Input with Multiple Numbers in the msg.payload but no exact Identity. The Identity of each payload is in the Topic. I want to add all togehter in a function and add the Identity to it like Vol…

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## [New project looking for ideas on how to do it - picture names](https://discourse.nodered.org/t/new-project-looking-for-ideas-on-how-to-do-it-picture-names/98229)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 16\
**Last updated:** [21 July 2025 10:52 UTC](https://discourse.nodered.org/t/new-project-looking-for-ideas-on-how-to-do-it-picture-names/98229 "2025-07-21T10:52:33Z")

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(It was hard to rename them when they were on a DVD) I've recently put a LOT of pictures (.jpg) on my NAS. Their existing names are somewhat..... poor. I do see the advantage leaving them with their default names as w…

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## [I want to build a search engine for my collection of DVDs](https://discourse.nodered.org/t/i-want-to-build-a-search-engine-for-my-collection-of-dvds/98221)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 20\
**Last updated:** [21 July 2025 10:04 UTC](https://discourse.nodered.org/t/i-want-to-build-a-search-engine-for-my-collection-of-dvds/98221 "2025-07-21T10:04:34Z")

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I have a few of them. It is getting more viable to search them than try to remember which ones I have. Bog standard text file. So I would like to search them. They are NOT in ALPHABETICAL order. Rather, ordered as t…

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