# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=345

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

**Page:** 346

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## [Communicate Node-RED with rs485](https://discourse.nodered.org/t/communicate-node-red-with-rs485/65434)

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**Author:** [@vidal\_jr](https://discourse.nodered.org/u/vidal_jr)\
**Replies:** 2\
**Last updated:** [25 July 2022 09:34 UTC](https://discourse.nodered.org/t/communicate-node-red-with-rs485/65434 "2022-07-25T09:34:40Z")

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Hi everyone, I’m trying to communicate with red node to a ballast via an RS485 to USB converter. This ballast is used to light some lamps. I have the ballast configured for communication via RS485, connected to the RS48…

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## [Change msg.payload from text to value](https://discourse.nodered.org/t/change-msg-payload-from-text-to-value/65547)

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**Author:** [@Joep.piet](https://discourse.nodered.org/u/Joep.piet)\
**Replies:** 4\
**Last updated:** [25 July 2022 09:28 UTC](https://discourse.nodered.org/t/change-msg-payload-from-text-to-value/65547 "2022-07-25T09:28:51Z")

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Hi everyone, First of all, I'm pretty new here so if I'm using the wrong termonology or my problem has to be in a different topic, I'll apologise beforehand :slight\_smile: I'm having trouble to show coördinates on a wo…

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## [How do I convert a csv file into a chart?](https://discourse.nodered.org/t/how-do-i-convert-a-csv-file-into-a-chart/65454)

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**Author:** [@person09](https://discourse.nodered.org/u/person09)\
**Replies:** 8\
**Last updated:** [25 July 2022 09:17 UTC](https://discourse.nodered.org/t/how-do-i-convert-a-csv-file-into-a-chart/65454 "2022-07-25T09:17:15Z")

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I've been having such a hard time understanding how to use Node Red's functionality in reading a csv file and converting it into a scatter plot chart. I have a CSV file that looks like this: 09-16-1989, 45 09-16-1990,…

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## [Using Node-RED to transfer data from InfluxDB 1.7 to 2.3, but receiving ENOBUFS error when dataset is too large](https://discourse.nodered.org/t/using-node-red-to-transfer-data-from-influxdb-1-7-to-2-3-but-receiving-enobufs-error-when-dataset-is-too-large/65532)

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**Author:** [@grant1](https://discourse.nodered.org/u/grant1)\
**Replies:** 9\
**Last updated:** [25 July 2022 08:30 UTC](https://discourse.nodered.org/t/using-node-red-to-transfer-data-from-influxdb-1-7-to-2-3-but-receiving-enobufs-error-when-dataset-is-too-large/65532 "2022-07-25T08:30:25Z")

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I am using Node-RED to convert my InfluxDB 1.7 data to populate InfluxDB 2.3 using the attached flow. Influx1.7 to 2.3.json (2.7 KB) In both databases, the frequency is 1 reading per minute. If I run the flow and limi…

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## [Dynamic ip address for "node-red-contrib-gree-hvac"](https://discourse.nodered.org/t/dynamic-ip-address-for-node-red-contrib-gree-hvac/64450)

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**Author:** [@henkkas](https://discourse.nodered.org/u/henkkas)\
**Replies:** 10\
**Last updated:** [25 July 2022 08:20 UTC](https://discourse.nodered.org/t/dynamic-ip-address-for-node-red-contrib-gree-hvac/64450 "2022-07-25T08:20:28Z")

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I installed this node for my new GREE airco's and it works very well. My problem is that I cannot give this AC a fixed IP address by DHCP reservation, so now I was wondering if I can dynamically change the ip address of…

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## [Save multiple inputs Sqlite - undefined](https://discourse.nodered.org/t/save-multiple-inputs-sqlite-undefined/65513)

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**Author:** [@dave-the-gardener](https://discourse.nodered.org/u/dave-the-gardener)\
**Replies:** 8\
**Last updated:** [25 July 2022 04:20 UTC](https://discourse.nodered.org/t/save-multiple-inputs-sqlite-undefined/65513 "2022-07-25T04:20:38Z")

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I am a very beginner and have been able to bring in data via MQTT and graph it, but now I want to save to SQLite. I am using Ubuntu on an old PC not sure what I am doing wrong to get 'undefined' Here is a debug from t…

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## [Node-red with BACnet](https://discourse.nodered.org/t/node-red-with-bacnet/65457)

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**Author:** [@saila](https://discourse.nodered.org/u/saila)\
**Replies:** 2\
**Last updated:** [25 July 2022 01:31 UTC](https://discourse.nodered.org/t/node-red-with-bacnet/65457 "2022-07-25T01:31:18Z")

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hi , i would like to know how can i connect node-red with bacnet device , i am using yet another bacnet explorer but i keep getting the error time out .

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## [How read data from balance (Serial port rs232 ) available on the network](https://discourse.nodered.org/t/how-read-data-from-balance-serial-port-rs232-available-on-the-network/65473)

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**Author:** [@matteovi](https://discourse.nodered.org/u/matteovi)\
**Replies:** 2\
**Last updated:** [24 July 2022 21:14 UTC](https://discourse.nodered.org/t/how-read-data-from-balance-serial-port-rs232-available-on-the-network/65473 "2022-07-24T21:14:00Z")

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Hi, I need to connect a balance that use a serial port rs232, that it is connected in another terminal, but available on the network and visible from an ip server. That's ip server it's a moxa server and could manage set…

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## [Errors updating multiple nodes: mysql, email](https://discourse.nodered.org/t/errors-updating-multiple-nodes-mysql-email/65478)

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**Author:** [@Ashfaak](https://discourse.nodered.org/u/Ashfaak)\
**Replies:** 15\
**Last updated:** [24 July 2022 21:11 UTC](https://discourse.nodered.org/t/errors-updating-multiple-nodes-mysql-email/65478 "2022-07-24T21:11:11Z")

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Debian 10 Node.js: 16.16.0 node-red: 2.2.2 node-red-node-email: 1.15.1 node-red-node-mysql: 1.0.2 I just updated node-red-node-mysql to 1.0.2 successfully. Tried to update the email node and got the below error. Saw…

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## [Starting with flows stopped](https://discourse.nodered.org/t/starting-with-flows-stopped/65537)

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**Author:** [@LosinIt](https://discourse.nodered.org/u/LosinIt)\
**Replies:** 5\
**Last updated:** [24 July 2022 20:34 UTC](https://discourse.nodered.org/t/starting-with-flows-stopped/65537 "2022-07-24T20:34:47Z")

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Hi, all. I hate Discourse's search! I've created a start-crash-restart loop and I need to start NR in Docker with the flows stopped so I can fix it. I tried --safe but Docker refuses it so I'd like to set whatever in s…

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## [Variable within flow group](https://discourse.nodered.org/t/variable-within-flow-group/65542)

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**Author:** [@samezrp](https://discourse.nodered.org/u/samezrp)\
**Replies:** 1\
**Last updated:** [24 July 2022 20:20 UTC](https://discourse.nodered.org/t/variable-within-flow-group/65542 "2022-07-24T20:20:37Z")

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Hi, Is it possible to set variable within flow group? The case: -I have several the same groups for different Shelly dimmers; -I use number in Shelly name to distinguish them like shellydimmer01, shellydimmer02; -no…

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## [Dimmer Button - Moes / Smart Knob](https://discourse.nodered.org/t/dimmer-button-moes-smart-knob/65535)

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**Author:** [@gregolin](https://discourse.nodered.org/u/gregolin)\
**Replies:** 1\
**Last updated:** [24 July 2022 19:53 UTC](https://discourse.nodered.org/t/dimmer-button-moes-smart-knob/65535 "2022-07-24T19:53:10Z")

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Hi. Has anyone had success with Moes/Smart Knob button setup with Node Red? It seems Z2M is accepting 4 actions: single press, double press, long press and rotate (left/right). I'm not been able to work with it and I'd…

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## [Instructions for modules through function node](https://discourse.nodered.org/t/instructions-for-modules-through-function-node/64967)

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**Author:** [@Kylespamaccoun7](https://discourse.nodered.org/u/Kylespamaccoun7)\
**Replies:** 4\
**Last updated:** [24 July 2022 18:12 UTC](https://discourse.nodered.org/t/instructions-for-modules-through-function-node/64967 "2022-07-24T18:12:26Z")

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I recently updated to the version that allows modules to be added from the function node. I am trying to test this out. I have the module installed. Is there documentation available explaining what to do next? I can't …

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## [Action based in hours and previous signals](https://discourse.nodered.org/t/action-based-in-hours-and-previous-signals/65502)

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**Author:** [@gregolin](https://discourse.nodered.org/u/gregolin)\
**Replies:** 2\
**Last updated:** [24 July 2022 17:02 UTC](https://discourse.nodered.org/t/action-based-in-hours-and-previous-signals/65502 "2022-07-24T17:02:32Z")

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Hi. I'm new with node red, but having some success with the most of my projects :slight\_smile: I'm facing issues with one of them where I want to turn the light on when I open my smart lock and the time is between 6pm …

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## [FR : Projects : New enhancement request to have Git Logs as part of the flows when exported](https://discourse.nodered.org/t/fr-projects-new-enhancement-request-to-have-git-logs-as-part-of-the-flows-when-exported/65511)

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**Author:** [@SandeepA](https://discourse.nodered.org/u/SandeepA)\
**Replies:** 3\
**Last updated:** [24 July 2022 13:42 UTC](https://discourse.nodered.org/t/fr-projects-new-enhancement-request-to-have-git-logs-as-part-of-the-flows-when-exported/65511 "2022-07-24T13:42:20Z")

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Hi - My request is specifically when Projects are enabled. When projects are enabled , in addition to the current Export - can we look to add "Export committed flows" . This option will export the specific committed f…

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## [Google Calendar “new event created”](https://discourse.nodered.org/t/google-calendar-new-event-created/65519)

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**Author:** [@joeblack2k](https://discourse.nodered.org/u/joeblack2k)\
**Replies:** 1\
**Last updated:** [24 July 2022 13:34 UTC](https://discourse.nodered.org/t/google-calendar-new-event-created/65519 "2022-07-24T13:34:01Z")

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Hey, My wife and I share a google calendar and whenever she makes a change I would like to receive a message preferably on our telegram group chat. I googled the last 2 days but I don’t thing anyone has ever made or di…

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## [Modbus TCP Server on port 502](https://discourse.nodered.org/t/modbus-tcp-server-on-port-502/4760)

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**Author:** [@victor](https://discourse.nodered.org/u/victor)\
**Replies:** 13\
**Last updated:** [24 July 2022 12:31 UTC](https://discourse.nodered.org/t/modbus-tcp-server-on-port-502/4760 "2022-07-24T12:31:26Z")

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Hi . I am trying to create a TCP modbus server on standard port 502, but when using this port , I do not know why but the system crash. Does anyone have experience in this matter? Thanks

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## [Custom hotkeys (key combinations) in monaco command palette](https://discourse.nodered.org/t/custom-hotkeys-key-combinations-in-monaco-command-palette/65510)

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**Author:** [@ei23](https://discourse.nodered.org/u/ei23)\
**Replies:** 10\
**Last updated:** [24 July 2022 11:33 UTC](https://discourse.nodered.org/t/custom-hotkeys-key-combinations-in-monaco-command-palette/65510 "2022-07-24T11:33:07Z")

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Hi 3.0 is great so far, so a huge thank you for the great work! Since i'm now also switching from ace to monaco, there a some habits that don't want to move so fast :wink: Sooo is there a possibility to set custom shor…

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## [In which situations would Node IDs change ? Import or any other as well?](https://discourse.nodered.org/t/in-which-situations-would-node-ids-change-import-or-any-other-as-well/65500)

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**Author:** [@SandeepA](https://discourse.nodered.org/u/SandeepA)\
**Replies:** 2\
**Last updated:** [23 July 2022 19:06 UTC](https://discourse.nodered.org/t/in-which-situations-would-node-ids-change-import-or-any-other-as-well/65500 "2022-07-23T19:06:56Z")

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Hi, I have a query , in which situations does the ids of flows and nodes changes ? I was under impression that import changes the IDs. So i exported a flow. Deleted it . And then imported it - but IDs remain same. (I…

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## [Node-red-reload not always showing Welcome message](https://discourse.nodered.org/t/node-red-reload-not-always-showing-welcome-message/65507)

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**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\
**Replies:** 0\
**Last updated:** [23 July 2022 15:55 UTC](https://discourse.nodered.org/t/node-red-reload-not-always-showing-welcome-message/65507 "2022-07-23T15:55:13Z")

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Running NR 3.0.1 with nodejs 16.16.0 on Ubuntu, installed using the Pi install script from the docs. When I run node-red-reload to restart node-red, sometimes the start of the node red log is missing. So I see ~/.no…

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## [Ok, I am really digging the new Javascript editor environment in NR 3.0, but I noticed something?](https://discourse.nodered.org/t/ok-i-am-really-digging-the-new-javascript-editor-environment-in-nr-3-0-but-i-noticed-something/65452)

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**Author:** [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\
**Replies:** 6\
**Last updated:** [23 July 2022 14:18 UTC](https://discourse.nodered.org/t/ok-i-am-really-digging-the-new-javascript-editor-environment-in-nr-3-0-but-i-noticed-something/65452 "2022-07-23T14:18:07Z")

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I happen to type 'node.warm(msg);' and then saved the function node, and the new code validation did not flag that is wrong and the flow executed.... the node.warm never executed of course. That not a bug? Bad command …

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## [Write file node error when writing to an open csv file](https://discourse.nodered.org/t/write-file-node-error-when-writing-to-an-open-csv-file/65479)

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**Author:** [@KarolisL](https://discourse.nodered.org/u/KarolisL)\
**Replies:** 26\
**Last updated:** [23 July 2022 09:47 UTC](https://discourse.nodered.org/t/write-file-node-error-when-writing-to-an-open-csv-file/65479 "2022-07-23T09:47:33Z")

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When I write to csv file when file is opened I receive error: "failed to append to file: Error: EBUSY: resource busy or locked, open 'C:\\Users\\User\\Desktop\\xxxx.csv'" When I close the file I always receive error: "fai…

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## ["Sensor update attempted without connection to server."](https://discourse.nodered.org/t/sensor-update-attempted-without-connection-to-server/65061)

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**Author:** [@jaimmor](https://discourse.nodered.org/u/jaimmor)\
**Replies:** 3\
**Last updated:** [23 July 2022 07:52 UTC](https://discourse.nodered.org/t/sensor-update-attempted-without-connection-to-server/65061 "2022-07-23T07:52:12Z")

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Hello! I am trying to setup an entity within HA from Node-Red but I am getting this error: "Sensor update attempted without connection to server." I have other entities that are being updated and pushed to HA just fin…

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## [Referencing Network variable Value in a function node](https://discourse.nodered.org/t/referencing-network-variable-value-in-a-function-node/65441)

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**Author:** [@RBSI](https://discourse.nodered.org/u/RBSI)\
**Replies:** 3\
**Last updated:** [23 July 2022 07:22 UTC](https://discourse.nodered.org/t/referencing-network-variable-value-in-a-function-node/65441 "2022-07-23T07:22:06Z")

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Hello how can i reference a network variable value in the payload of a function node? Thanks

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## [Running on Windows (again)](https://discourse.nodered.org/t/running-on-windows-again/65236)

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**Author:** [@jbudd](https://discourse.nodered.org/u/jbudd)\
**Replies:** 7\
**Last updated:** [23 July 2022 06:58 UTC](https://discourse.nodered.org/t/running-on-windows-again/65236 "2022-07-23T06:58:14Z")

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I have installed Node-red on Windows 10 and used Task Scheduler to make it start at boot: It does start but I get a console window on the desktop: I want it to run not secretly but inconspicuously in the backgrou…

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## [Difference in Time Zone in UI Builder](https://discourse.nodered.org/t/difference-in-time-zone-in-ui-builder/65303)

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**Author:** [@TROJAN053](https://discourse.nodered.org/u/TROJAN053)\
**Replies:** 7\
**Last updated:** [23 July 2022 00:21 UTC](https://discourse.nodered.org/t/difference-in-time-zone-in-ui-builder/65303 "2022-07-23T00:21:23Z")

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HI, I am using a UI Builder to show data from my SQL Server. The data is having difference in TIME ZONE i guess in UI Builder to that of SQL Server. My Payload data is also coming same time zone as of SQL Server but in …

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## [Missing nodes in node-red editor](https://discourse.nodered.org/t/missing-nodes-in-node-red-editor/65398)

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**Author:** [@jaimmor](https://discourse.nodered.org/u/jaimmor)\
**Replies:** 6\
**Last updated:** [22 July 2022 21:15 UTC](https://discourse.nodered.org/t/missing-nodes-in-node-red-editor/65398 "2022-07-22T21:15:26Z")

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Hello! I just launched NodeRed to work on some stuff and I noticed all of my nodes are gone... Any idea how I recover from this? Current version: 13.0.0

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## [Email Node: Flow stops if no unread emails](https://discourse.nodered.org/t/email-node-flow-stops-if-no-unread-emails/65489)

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**Author:** [@rakgupta](https://discourse.nodered.org/u/rakgupta)\
**Replies:** 5\
**Last updated:** [22 July 2022 18:47 UTC](https://discourse.nodered.org/t/email-node-flow-stops-if-no-unread-emails/65489 "2022-07-22T18:47:31Z")

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Hello: I have a flow that fetches unread emails (Report from Smart Meter Texas) once per day, parses the CSV attachment and stores the data in a database. The flow works fine but if there are no unread emails (report wa…

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## [Request example to have button disabled when uibuilder.onchance](https://discourse.nodered.org/t/request-example-to-have-button-disabled-when-uibuilder-onchance/65386)

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**Author:** [@dedicatedtek](https://discourse.nodered.org/u/dedicatedtek)\
**Replies:** 8\
**Last updated:** [22 July 2022 16:18 UTC](https://discourse.nodered.org/t/request-example-to-have-button-disabled-when-uibuilder-onchance/65386 "2022-07-22T16:18:18Z")

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I've got the uibuilder simple example running. Now I'd like to be able to control the button on the front-end side depending on uibuilder (either onchange or node-red msg) hopefully my request is clear.

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## [I've created a twitter bot that can tweet, but I don't know how to make it reply to a tweet](https://discourse.nodered.org/t/ive-created-a-twitter-bot-that-can-tweet-but-i-dont-know-how-to-make-it-reply-to-a-tweet/65377)

<div class="topic-metadata">

**Author:** [@maxwh20](https://discourse.nodered.org/u/maxwh20)\
**Replies:** 2\
**Last updated:** [22 July 2022 12:32 UTC](https://discourse.nodered.org/t/ive-created-a-twitter-bot-that-can-tweet-but-i-dont-know-how-to-make-it-reply-to-a-tweet/65377 "2022-07-22T12:32:07Z")

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So here's my current flow, the twitter in node detects everytime I tweet something, it then publishes that to an MQTT server under the topic 'tweetin' where it is processed in a python code and an output is published …

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