# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=164

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

**Page:** 165

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## [Import module node-crc](https://discourse.nodered.org/t/import-module-node-crc/82493)

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**Author:** [@Sineos](https://discourse.nodered.org/u/Sineos)\
**Replies:** 0\
**Last updated:** [31 October 2023 14:29 UTC](https://discourse.nodered.org/t/import-module-node-crc/82493 "2023-10-31T14:29:47Z")

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Hi all, I'm trying to use the module node-crc and while other imported modules work, I cannot get this one to work. 1st attempt: called with: const result = nodecrc.crc(...) always ends up with: TypeError: Canno…

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## [Node-red won't start on Home assistant](https://discourse.nodered.org/t/node-red-wont-start-on-home-assistant/82435)

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**Author:** [@suriya](https://discourse.nodered.org/u/suriya)\
**Replies:** 4\
**Last updated:** [31 October 2023 09:07 UTC](https://discourse.nodered.org/t/node-red-wont-start-on-home-assistant/82435 "2023-10-31T09:07:09Z")

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Node-red won't start on home assistant, how to fix it?

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## [RS485/ Modbus 2x 16Bit Buffer conversion to signed 24Bit Datatype from Finder-Meter 7M38](https://discourse.nodered.org/t/rs485-modbus-2x-16bit-buffer-conversion-to-signed-24bit-datatype-from-finder-meter-7m38/82443)

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**Author:** [@chris123](https://discourse.nodered.org/u/chris123)\
**Replies:** 1\
**Last updated:** [31 October 2023 09:54 UTC](https://discourse.nodered.org/t/rs485-modbus-2x-16bit-buffer-conversion-to-signed-24bit-datatype-from-finder-meter-7m38/82443 "2023-10-31T09:54:47Z")

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Hi all, I got help here already with a similar problem but now i got stuck again. I'm reading values from a finder energymeter with modbus into node-red. That's ok. But now I'm not able to convert the two incomming 16…

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## [Vanishing flows](https://discourse.nodered.org/t/vanishing-flows/82362)

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**Author:** [@Trocergian](https://discourse.nodered.org/u/Trocergian)\
**Replies:** 11\
**Last updated:** [30 October 2023 21:15 UTC](https://discourse.nodered.org/t/vanishing-flows/82362 "2023-10-30T21:15:07Z")

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I've been running a node-red flow that take data from a raspberry pi and inputs it into an online postgres database. It's been running fine fr over a year. Then ealier this week I was notified of a data stoppage and when …

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## [Help me to read this register](https://discourse.nodered.org/t/help-me-to-read-this-register/82461)

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**Author:** [@Asif128935](https://discourse.nodered.org/u/Asif128935)\
**Replies:** 3\
**Last updated:** [30 October 2023 19:52 UTC](https://discourse.nodered.org/t/help-me-to-read-this-register/82461 "2023-10-30T19:52:09Z")

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Please give me some idea to develop this marked register in node red.

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## [CSV node: Regional settings in date, time and numeric variables](https://discourse.nodered.org/t/csv-node-regional-settings-in-date-time-and-numeric-variables/82474)

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**Author:** [@jw\_te\_r](https://discourse.nodered.org/u/jw_te_r)\
**Replies:** 6\
**Last updated:** [30 October 2023 18:50 UTC](https://discourse.nodered.org/t/csv-node-regional-settings-in-date-time-and-numeric-variables/82474 "2023-10-30T18:50:06Z")

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I made a MySQL table to save sensor data which is defined like so: var topic; topic = "CREATE TABLE \`datapoint\` ( "; topic = topic + "\`no\` INT NOT NULL AUTO\_INCREMENT,"; topic = topic + "\`date\` TIMESTAMP DEFAULT CURREN…

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## [TCP request node - manual disconnection / reconnection?](https://discourse.nodered.org/t/tcp-request-node-manual-disconnection-reconnection/82441)

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**Author:** [@FloRu](https://discourse.nodered.org/u/FloRu)\
**Replies:** 4\
**Last updated:** [30 October 2023 18:29 UTC](https://discourse.nodered.org/t/tcp-request-node-manual-disconnection-reconnection/82441 "2023-10-30T18:29:06Z")

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Hi there! I am using the TCP request node to connect to one or two TCP servers. Everything works fine until e.g. the VPN connection to the host network disrupts. The TCP node doesn't recognize that the connection is dro…

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## [Howto organize data for multiline chart node](https://discourse.nodered.org/t/howto-organize-data-for-multiline-chart-node/82471)

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**Author:** [@Kliurka](https://discourse.nodered.org/u/Kliurka)\
**Replies:** 2\
**Last updated:** [30 October 2023 15:36 UTC](https://discourse.nodered.org/t/howto-organize-data-for-multiline-chart-node/82471 "2023-10-30T15:36:58Z")

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hello guys howto organize data array from modbus for multi line chart node

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## [Saving time series data from docker container](https://discourse.nodered.org/t/saving-time-series-data-from-docker-container/82469)

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**Author:** [@polareisbaer](https://discourse.nodered.org/u/polareisbaer)\
**Replies:** 4\
**Last updated:** [30 October 2023 13:45 UTC](https://discourse.nodered.org/t/saving-time-series-data-from-docker-container/82469 "2023-10-30T13:45:32Z")

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Hello, I am using node-red in a docker container. The persistent data is stored outside the container in a named data volume. But the time series data from mqtt is lost every time the container is restarted. Is there a …

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## [Update nodes dynamically based on connection](https://discourse.nodered.org/t/update-nodes-dynamically-based-on-connection/82176)

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**Author:** [@chiru](https://discourse.nodered.org/u/chiru)\
**Replies:** 24\
**Last updated:** [30 October 2023 12:35 UTC](https://discourse.nodered.org/t/update-nodes-dynamically-based-on-connection/82176 "2023-10-30T12:35:12Z")

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Hi, I want to create three kinds of custom nodes A, B and C. Does nodered provide any way to dynamically update fields of C if it is connected by B or C? For example if I connect(wired) A to C, then I want C's fields to…

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## [Function node and node.done()](https://discourse.nodered.org/t/function-node-and-node-done/82467)

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**Author:** [@Lupin\_III](https://discourse.nodered.org/u/Lupin_III)\
**Replies:** 4\
**Last updated:** [30 October 2023 12:24 UTC](https://discourse.nodered.org/t/function-node-and-node-done/82467 "2023-10-30T12:24:07Z")

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Hi, sorry if this can seem a silly question, but just to be sure I correctly understand it and use it. The code inside the funcion node is syncronous. I have a function node that use the input message in a for cycle. Wi…

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## [How to use websockets to send a reply back to client](https://discourse.nodered.org/t/how-to-use-websockets-to-send-a-reply-back-to-client/82448)

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**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 2\
**Last updated:** [30 October 2023 10:26 UTC](https://discourse.nodered.org/t/how-to-use-websockets-to-send-a-reply-back-to-client/82448 "2023-10-30T10:26:32Z")

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So in my fun MQTT project I thought - lets try seeing if I can set it up to use websockets (just on LAN) So, I created this little flow \[{"id":"99a9e9a5e664458a","type":"websocket out","z":"f7546f055375d300","name":"",…

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## [Filter Node: Value Change with Strings](https://discourse.nodered.org/t/filter-node-value-change-with-strings/82462)

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**Author:** [@n94](https://discourse.nodered.org/u/n94)\
**Replies:** 2\
**Last updated:** [30 October 2023 10:10 UTC](https://discourse.nodered.org/t/filter-node-value-change-with-strings/82462 "2023-10-30T10:10:16Z")

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Hi there! I would like to ask, how the Filter-Node works, when I compare strings with the setting, that the message should be blocked, if the value change is greater than x. Does the Node make a conversion of strings to…

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## [Writing an if function](https://discourse.nodered.org/t/writing-an-if-function/82445)

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**Author:** [@jared.rackliff](https://discourse.nodered.org/u/jared.rackliff)\
**Replies:** 11\
**Last updated:** [30 October 2023 01:34 UTC](https://discourse.nodered.org/t/writing-an-if-function/82445 "2023-10-30T01:34:12Z")

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Good morning, I am so new to Node-Red and really want to be able to succeed. I have been banging my head for days now on creating an if statement. I am trying to see If a specific deviceid is set to 1. if so it will …

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## [Overriding the Delay-Node default delay from a function](https://discourse.nodered.org/t/overriding-the-delay-node-default-delay-from-a-function/82453)

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**Author:** [@xytsrm](https://discourse.nodered.org/u/xytsrm)\
**Replies:** 6\
**Last updated:** [30 October 2023 00:41 UTC](https://discourse.nodered.org/t/overriding-the-delay-node-default-delay-from-a-function/82453 "2023-10-30T00:41:56Z")

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Using a Delay-Node configured to override delay; I've tried this code in a Function-Node: var delayTime = 20000; // 20 seconds var msgDelay = { payload: "START", timerDuration: delayTime, timerDurationUnit: "milliseco…

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## [Disabling manual flow inject](https://discourse.nodered.org/t/disabling-manual-flow-inject/82452)

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**Author:** [@Paul-Reed](https://discourse.nodered.org/u/Paul-Reed)\
**Replies:** 6\
**Last updated:** [29 October 2023 23:27 UTC](https://discourse.nodered.org/t/disabling-manual-flow-inject/82452 "2023-10-29T23:27:23Z")

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I have a flow which calculates financial compounded interest from savings. The flow runs every midnight, and each subsequent node in the flow then does a calculation from saved context values, and outputs the amount of …

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## [Node-red : file -- write & set ownership](https://discourse.nodered.org/t/node-red-file-write-set-ownership/82398)

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**Author:** [@gNeandr](https://discourse.nodered.org/u/gNeandr)\
**Replies:** 18\
**Last updated:** [29 October 2023 13:26 UTC](https://discourse.nodered.org/t/node-red-file-write-set-ownership/82398 "2023-10-29T13:26:34Z")

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It's about "node-red : file -- write", how to set the ownership of the file to be written? Is it always set to 'root:root'? If yes, how to change it within NR? It's on RaspberryPI with Raspbian GNU/Linux 11 (bullseye). …

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## [Buffer-Parser fails by using specification](https://discourse.nodered.org/t/buffer-parser-fails-by-using-specification/82432)

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**Author:** [@chris123](https://discourse.nodered.org/u/chris123)\
**Replies:** 2\
**Last updated:** [29 October 2023 08:30 UTC](https://discourse.nodered.org/t/buffer-parser-fails-by-using-specification/82432 "2023-10-29T08:30:34Z")

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Hi All, I've got no answer for this behavior of the buffer-parser: I've got some bytes pushing through the buffer-parser. As long as I do all the settings within the buffer-parser node itselve, all is like expected. Bu…

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## [TAPO{"result":false,"errorInf":"Error: Unexpected Error Code: 1003 (undefined)"}](https://discourse.nodered.org/t/tapo-result-false-errorinf-error-unexpected-error-code-1003-undefined/82114)

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**Author:** [@wcumps](https://discourse.nodered.org/u/wcumps)\
**Replies:** 4\
**Last updated:** [29 October 2023 00:38 UTC](https://discourse.nodered.org/t/tapo-result-false-errorinf-error-unexpected-error-code-1003-undefined/82114 "2023-10-29T00:38:12Z")

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Hi, Does anyone have a solution fro the new bug with the TPLINK TP100, since the new firmware on the I'm getting this error node-red-contrib-tplink-tapo-connect-api 0.3.5

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## [Creating Global Varibles using Setting.js](https://discourse.nodered.org/t/creating-global-varibles-using-setting-js/82431)

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**Author:** [@xytsrm](https://discourse.nodered.org/u/xytsrm)\
**Replies:** 10\
**Last updated:** [29 October 2023 00:14 UTC](https://discourse.nodered.org/t/creating-global-varibles-using-setting-js/82431 "2023-10-29T00:14:18Z")

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I'm interested in creating about 20 global variables that would be available to all Function-Nodes. I had found this suggestion: I placed this code-snippet in the Setting.js file: module.exports = { functionGlobalC…

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## [Wiring multiple to single and v.v. - feature request?](https://discourse.nodered.org/t/wiring-multiple-to-single-and-v-v-feature-request/82430)

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**Author:** [@hazymat](https://discourse.nodered.org/u/hazymat)\
**Replies:** 1\
**Last updated:** [28 October 2023 18:54 UTC](https://discourse.nodered.org/t/wiring-multiple-to-single-and-v-v-feature-request/82430 "2023-10-28T18:54:16Z")

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Sorry this post is going to be a bit confusing, if nobody understands what I'm saying then I can make a video with description - just let me know. The problem? I was looking for a way to alleviate the tedium of wiring …

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## [How to install node red and recognizer](https://discourse.nodered.org/t/how-to-install-node-red-and-recognizer/82249)

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**Author:** [@azxo1](https://discourse.nodered.org/u/azxo1)\
**Replies:** 60\
**Last updated:** [28 October 2023 16:48 UTC](https://discourse.nodered.org/t/how-to-install-node-red-and-recognizer/82249 "2023-10-28T16:48:28Z")

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Hello everyone! My question would be with what rights install node red, google recognizer, python3 so that there are no dependencies. Because it is in node red, e.g. the bigexec node, from which I run a python script t…

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## [Securing Node-RED: Using a custom HTTP header (tokenHeader) with regular "credentials" adminAuth](https://discourse.nodered.org/t/securing-node-red-using-a-custom-http-header-tokenheader-with-regular-credentials-adminauth/82404)

<div class="topic-metadata">

**Author:** [@f333f9](https://discourse.nodered.org/u/f333f9)\
**Replies:** 5\
**Last updated:** [28 October 2023 16:30 UTC](https://discourse.nodered.org/t/securing-node-red-using-a-custom-http-header-tokenheader-with-regular-credentials-adminauth/82404 "2023-10-28T16:30:21Z")

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Hi, I just installed a new Node-RED instance. Following the Securing Node-RED page, I enabled the Username/password based authentication (type: "credentials") in settings.js file. It works well, but unfortunately this …

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## [Node Victron-Dynamic-Ess cannot be updated, removed or installed](https://discourse.nodered.org/t/node-victron-dynamic-ess-cannot-be-updated-removed-or-installed/82423)

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**Author:** [@Christian\_MP2](https://discourse.nodered.org/u/Christian_MP2)\
**Replies:** 3\
**Last updated:** [28 October 2023 13:24 UTC](https://discourse.nodered.org/t/node-victron-dynamic-ess-cannot-be-updated-removed-or-installed/82423 "2023-10-28T13:24:05Z")

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Hello, I'm new here and don't know much about Node-Red. Node-Red runs for me under VenusOS V3.11 on a Pi. I had installed Victron-Dynamic-Ess to try it out, it was running in version 0.1.6 when I updated to V0.1.8 there…

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## [Transfer whole instance of Node-red to a new computer](https://discourse.nodered.org/t/transfer-whole-instance-of-node-red-to-a-new-computer/82422)

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**Author:** [@algaillard](https://discourse.nodered.org/u/algaillard)\
**Replies:** 4\
**Last updated:** [28 October 2023 10:41 UTC](https://discourse.nodered.org/t/transfer-whole-instance-of-node-red-to-a-new-computer/82422 "2023-10-28T10:41:10Z")

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Hello, Sorry, I think there is already an anwer for this question, but I didn't find the exact use case. My question : I presently run a node-red instance on a mac computer, but I want to change to another (mac-mini). …

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## [What is default key to delete a node in the editor?](https://discourse.nodered.org/t/what-is-default-key-to-delete-a-node-in-the-editor/82411)

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**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 24\
**Last updated:** [28 October 2023 09:17 UTC](https://discourse.nodered.org/t/what-is-default-key-to-delete-a-node-in-the-editor/82411 "2023-10-28T09:17:06Z")

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I was messing around with keyboard shortcuts and I think I've messed it up a bit I'd swear the default key was the delete key itself but if I enter that - it doesn't seem to work and I've had to assign the backspace key …

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## ["no schedule" when using ps-strategy-lowest-price](https://discourse.nodered.org/t/no-schedule-when-using-ps-strategy-lowest-price/82419)

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**Author:** [@Kalie15](https://discourse.nodered.org/u/Kalie15)\
**Replies:** 2\
**Last updated:** [28 October 2023 08:48 UTC](https://discourse.nodered.org/t/no-schedule-when-using-ps-strategy-lowest-price/82419 "2023-10-28T08:48:18Z")

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Hi all! After using my flow a couple of times "ps-strategy-lowest-price" suddenly shows "no schedule". Does anybody has an idea what's wrong? Thank you! debug7 says... {"schedule":\[{"time":"2023-10-28T00:00:00.…

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## [Way off topic - was there an outage just now?](https://discourse.nodered.org/t/way-off-topic-was-there-an-outage-just-now/82415)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 2\
**Last updated:** [27 October 2023 22:52 UTC](https://discourse.nodered.org/t/way-off-topic-was-there-an-outage-just-now/82415 "2023-10-27T22:52:03Z")

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For a while I couldn't load this page. PING's timed out and reloads of the page failed. Time hour:41 local. Friday 23:41 ZULU

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## [TCP connect node splits answer in the middle](https://discourse.nodered.org/t/tcp-connect-node-splits-answer-in-the-middle/82313)

<div class="topic-metadata">

**Author:** [@FloRu](https://discourse.nodered.org/u/FloRu)\
**Replies:** 15\
**Last updated:** [27 October 2023 17:13 UTC](https://discourse.nodered.org/t/tcp-connect-node-splits-answer-in-the-middle/82313 "2023-10-27T17:13:03Z")

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Hi! I - again - need some help with the following issue: I need to connect to a Server via TCP connection which works fine with the tcp request node. Then I have to send an opening message to start the connection - un…

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## [Creating HTML output](https://discourse.nodered.org/t/creating-html-output/82396)

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**Author:** [@seballa](https://discourse.nodered.org/u/seballa)\
**Replies:** 5\
**Last updated:** [27 October 2023 16:21 UTC](https://discourse.nodered.org/t/creating-html-output/82396 "2023-10-27T16:21:28Z")

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Hi I am just starting and I am stuck with a trivial problem. I managed to create an hello world page with http in --\> html --\> http response nodes. I also managed to read data from an device in my network. incoming -…

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