# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=179

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**Page:** 180

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## [Serial in node - no data](https://discourse.nodered.org/t/serial-in-node-no-data/81161)

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**Author:** [@Paul-Reed](https://discourse.nodered.org/u/Paul-Reed)\
**Replies:** 2\
**Last updated:** [10 September 2023 20:40 UTC](https://discourse.nodered.org/t/serial-in-node-no-data/81161 "2023-09-10T20:40:07Z")

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I have some data arriving via RF to a Raspberry Pi 3b+ and can see the data arriving via minicom in the Pi using the command sudo minicom -D /dev/ttyAMA0 -b9600 I'm trying to access that data by using a serial in node…

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## [Mysqldump - how to create a backup of mysql database from node-red](https://discourse.nodered.org/t/mysqldump-how-to-create-a-backup-of-mysql-database-from-node-red/81133)

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**Author:** [@smanjunath211](https://discourse.nodered.org/u/smanjunath211)\
**Replies:** 5\
**Last updated:** [10 September 2023 11:17 UTC](https://discourse.nodered.org/t/mysqldump-how-to-create-a-backup-of-mysql-database-from-node-red/81133 "2023-09-10T11:17:51Z")

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Hi, I tried searching forum but could not get any relevant results. so here is the question. How do I make a backup of my mysql database from node-red ? I am able to create a backup using mysqldump command in the resp…

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## [Extension object opcua compact server](https://discourse.nodered.org/t/extension-object-opcua-compact-server/81171)

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**Author:** [@denissanga](https://discourse.nodered.org/u/denissanga)\
**Replies:** 0\
**Last updated:** [10 September 2023 06:09 UTC](https://discourse.nodered.org/t/extension-object-opcua-compact-server/81171 "2023-09-10T06:09:26Z")

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Hi all I'm learning use extension object in opcua server opcua. Have someone a tutorial or example? Many thanks

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## [Node-RED 3.1, status under node has an odd background appearance?](https://discourse.nodered.org/t/node-red-3-1-status-under-node-has-an-odd-background-appearance/81143)

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**Author:** [@scargill](https://discourse.nodered.org/u/scargill)\
**Replies:** 18\
**Last updated:** [10 September 2023 02:46 UTC](https://discourse.nodered.org/t/node-red-3-1-status-under-node-has-an-odd-background-appearance/81143 "2023-09-10T02:46:13Z")

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Erm I coule well be wrong but ercently I upgraded my NR to nodejs 18 and NR to 3.0-something. All was well. This morning I upgraded to NR 3.10 - flawless using your script.... I could be wrong but until this morning I …

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## [What are people doing with the underlying OS and updates?](https://discourse.nodered.org/t/what-are-people-doing-with-the-underlying-os-and-updates/81154)

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**Author:** [@craigcurtin](https://discourse.nodered.org/u/craigcurtin)\
**Replies:** 4\
**Last updated:** [10 September 2023 02:39 UTC](https://discourse.nodered.org/t/what-are-people-doing-with-the-underlying-os-and-updates/81154 "2023-09-10T02:39:27Z")

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Guys, Now that 3.10 is in the Wild i intend to build a new VM as my primary OS for my live system. Currently running on Ubuntu 20.04 (LTS) I note now that Debian has finally moved to havving a LTS version. What are p…

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## [TypeError: Cannot read properties of undefined (reading 'Total\_in')"](https://discourse.nodered.org/t/typeerror-cannot-read-properties-of-undefined-reading-total-in/81165)

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**Author:** [@Tobi31](https://discourse.nodered.org/u/Tobi31)\
**Replies:** 3\
**Last updated:** [9 September 2023 23:18 UTC](https://discourse.nodered.org/t/typeerror-cannot-read-properties-of-undefined-reading-total-in/81165 "2023-09-09T23:18:44Z")

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Hi together, i am trying to extract my mqtt data by a change as well as a function the value Power.Total\_in. This is extracted cleanly, at least according to the debug. Strangely, right after the change in the function…

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## [SQLITE does not update from database in homenetwork](https://discourse.nodered.org/t/sqlite-does-not-update-from-database-in-homenetwork/81163)

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**Author:** [@redsql](https://discourse.nodered.org/u/redsql)\
**Replies:** 0\
**Last updated:** [9 September 2023 18:56 UTC](https://discourse.nodered.org/t/sqlite-does-not-update-from-database-in-homenetwork/81163 "2023-09-09T18:56:41Z")

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Hello everybody I am new here. I have an issue with node-red and Sqlite in my home network. On my Pi3 I have installed MQTT, Node-red(3.0.1) with Sqlite(1.0.3) and a database on the same device. The database is stored …

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## [NodeRed crashes with high CPU load](https://discourse.nodered.org/t/nodered-crashes-with-high-cpu-load/80977)

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**Author:** [@Graefe](https://discourse.nodered.org/u/Graefe)\
**Replies:** 2\
**Last updated:** [9 September 2023 09:20 UTC](https://discourse.nodered.org/t/nodered-crashes-with-high-cpu-load/80977 "2023-09-09T09:20:33Z")

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Hi, every 24h or so, NodeRed suddenly has a high CPU load (up from 0.5% to 30%) and becomes unresponsive and I cannot load the UI. The Log shows the following: So, it's about http-request and 192.168.3.90 which is m…

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## [Single Page Application - UI for Manufacturing Application](https://discourse.nodered.org/t/single-page-application-ui-for-manufacturing-application/81102)

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**Author:** [@juggler](https://discourse.nodered.org/u/juggler)\
**Replies:** 5\
**Last updated:** [8 September 2023 19:34 UTC](https://discourse.nodered.org/t/single-page-application-ui-for-manufacturing-application/81102 "2023-09-08T19:34:23Z")

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To start, I am an automation systems architect/engineer and experienced in most of the common programming languages and architectures. Use Case: Operator is assembling a widget, screwing in 4 bolts with a torque tool. …

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## [Read multiple csv files](https://discourse.nodered.org/t/read-multiple-csv-files/81114)

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**Author:** [@gioespo](https://discourse.nodered.org/u/gioespo)\
**Replies:** 5\
**Last updated:** [8 September 2023 19:33 UTC](https://discourse.nodered.org/t/read-multiple-csv-files/81114 "2023-09-08T19:33:09Z")

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Hello everyone, I need to read several csv files present in the same folder without having to change the path each time. is it possible to do this? If yes, how? I have not found any solution at the moment. I am new to…

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## [Add value from api to opc server](https://discourse.nodered.org/t/add-value-from-api-to-opc-server/81151)

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**Author:** [@mabba85](https://discourse.nodered.org/u/mabba85)\
**Replies:** 0\
**Last updated:** [8 September 2023 17:53 UTC](https://discourse.nodered.org/t/add-value-from-api-to-opc-server/81151 "2023-09-08T17:53:34Z")

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Hi how to move the value from api to opc server the opc server is working and i can get the value from API but how do i make the connection between? i have tryed with the set count msg.payload.variableValue but is ha…

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## [Template node and python](https://discourse.nodered.org/t/template-node-and-python/81146)

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**Author:** [@Lupin\_III](https://discourse.nodered.org/u/Lupin_III)\
**Replies:** 14\
**Last updated:** [8 September 2023 17:47 UTC](https://discourse.nodered.org/t/template-node-and-python/81146 "2023-09-08T17:47:48Z")

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Hi, I need to use python to run a script, and I'm scrambling to solve this two issues. I need to have the script within node-red for several reasons. Actually, I wrote the python script within the template node, then via…

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## [No node.js update on Openmediavault 4.x](https://discourse.nodered.org/t/no-node-js-update-on-openmediavault-4-x/81101)

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**Author:** [@stefan24](https://discourse.nodered.org/u/stefan24)\
**Replies:** 12\
**Last updated:** [8 September 2023 15:41 UTC](https://discourse.nodered.org/t/no-node-js-update-on-openmediavault-4-x/81101 "2023-09-08T15:41:06Z")

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Openmediavault 4.1.36-1 (Arrakis) is based on Debian GNU/Linux 9.11 (stretch) I have used the Pi script long time ago to install Node-RED 2.2 and now tried to install the new 3.1 version with parameter --node16. But I…

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## [Bacnet Write block](https://discourse.nodered.org/t/bacnet-write-block/81118)

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**Author:** [@AndrewTw](https://discourse.nodered.org/u/AndrewTw)\
**Replies:** 2\
**Last updated:** [8 September 2023 15:33 UTC](https://discourse.nodered.org/t/bacnet-write-block/81118 "2023-09-08T15:33:43Z")

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Hi I am new to Node-Red and am trying to use the bacnet node. I can get the read to work and the write to work. What I can't figure out is how to put a value into the write block. To clarify (I hope) the write block wor…

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## [Trying to add two inputs, but not sure how](https://discourse.nodered.org/t/trying-to-add-two-inputs-but-not-sure-how/81144)

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**Author:** [@rmystique](https://discourse.nodered.org/u/rmystique)\
**Replies:** 1\
**Last updated:** [8 September 2023 14:15 UTC](https://discourse.nodered.org/t/trying-to-add-two-inputs-but-not-sure-how/81144 "2023-09-08T14:15:26Z")

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Here is what I have pieced together, but not sure what I'm doing here, not getting any output to the debug? \[ { "id": "6d7c3b91d83d126b", "type": "function", "z": "f672d0ac69fd5b97", …

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## [What are flexServerInternals and sandboxFlowContext variables](https://discourse.nodered.org/t/what-are-flexserverinternals-and-sandboxflowcontext-variables/81142)

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**Author:** [@denissanga](https://discourse.nodered.org/u/denissanga)\
**Replies:** 0\
**Last updated:** [8 September 2023 13:02 UTC](https://discourse.nodered.org/t/what-are-flexserverinternals-and-sandboxflowcontext-variables/81142 "2023-09-08T13:02:54Z")

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hi all I'm using opcua compact server node and in a tutorial there are the following command in the javascript code function constructAlarmAddressSpace(server,addressSpace,eventObjects,done){ ... ... var flexServerIn…

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## [Dealing with API end points and arguments](https://discourse.nodered.org/t/dealing-with-api-end-points-and-arguments/81130)

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**Author:** [@arishy](https://discourse.nodered.org/u/arishy)\
**Replies:** 9\
**Last updated:** [8 September 2023 12:29 UTC](https://discourse.nodered.org/t/dealing-with-api-end-points-and-arguments/81130 "2023-09-08T12:29:28Z")

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I will use this url but I am hoping for general response. Here is an Example: \[https://api.first.org/data/v1/countries?region=africa&limit.=3&pretty=true\] My question is: How to use inject node to provide the "variabl…

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## [Dashboard Graph from Sqlite3 data](https://discourse.nodered.org/t/dashboard-graph-from-sqlite3-data/81120)

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**Author:** [@Delle](https://discourse.nodered.org/u/Delle)\
**Replies:** 2\
**Last updated:** [8 September 2023 10:24 UTC](https://discourse.nodered.org/t/dashboard-graph-from-sqlite3-data/81120 "2023-09-08T10:24:38Z")

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Hi, I 'm trying to plot a Graph from Sqlite3 data, so far so good. This is working: var dataout = \[\]; var a1 = \[\]; var payload = msg.payload for (let i = 0; i \< payload.length; i++) { ---\>\>\> var yy = payload\[i\].powe…

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## [Write home or to whom?](https://discourse.nodered.org/t/write-home-or-to-whom/81135)

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**Author:** [@Frida](https://discourse.nodered.org/u/Frida)\
**Replies:** 2\
**Last updated:** [8 September 2023 09:13 UTC](https://discourse.nodered.org/t/write-home-or-to-whom/81135 "2023-09-08T09:13:58Z")

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After the last updates of node-red, I have noticed that it has started writing home. I have not set up anything to write outside my home network. On a rpiz2w 6 Sep 01:51:59 - \[red\] Uncaught Exception: 6 Sep 01:51:59 -…

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## [Modbus and Serial IN/OUT nodes (both) use one serial port](https://discourse.nodered.org/t/modbus-and-serial-in-out-nodes-both-use-one-serial-port/81136)

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**Author:** [@John1](https://discourse.nodered.org/u/John1)\
**Replies:** 0\
**Last updated:** [8 September 2023 08:42 UTC](https://discourse.nodered.org/t/modbus-and-serial-in-out-nodes-both-use-one-serial-port/81136 "2023-09-08T08:42:56Z")

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Hello community. I have one device connected to serial port of device where Node-red runs (for instance - USB/RS485 converter connected to COM3). But, in Node-red flow, I have Modbus-Flex-Getter node and Serial IN/OUT n…

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## [FTP will only retrieve 1 file](https://discourse.nodered.org/t/ftp-will-only-retrieve-1-file/81073)

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**Author:** [@GregHNZ](https://discourse.nodered.org/u/GregHNZ)\
**Replies:** 9\
**Last updated:** [8 September 2023 08:27 UTC](https://discourse.nodered.org/t/ftp-will-only-retrieve-1-file/81073 "2023-09-08T08:27:39Z")

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When connecting to an FTP server we get a list of files that are ready for download. When trying to get these we are only ever getting 1 file downloaded. If we wire the last function to the Debug node we get each file …

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## [Accessing sqlite database tables](https://discourse.nodered.org/t/accessing-sqlite-database-tables/81132)

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**Author:** [@rajendra](https://discourse.nodered.org/u/rajendra)\
**Replies:** 1\
**Last updated:** [8 September 2023 07:28 UTC](https://discourse.nodered.org/t/accessing-sqlite-database-tables/81132 "2023-09-08T07:28:11Z")

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i am having different tables in my local db. trying to insert node data into tables. i can able to select path for db and not for tables how to do that?

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## [DS1990 1-wire support?](https://discourse.nodered.org/t/ds1990-1-wire-support/81104)

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**Author:** [@Jan\_Coetzer](https://discourse.nodered.org/u/Jan_Coetzer)\
**Replies:** 4\
**Last updated:** [8 September 2023 06:31 UTC](https://discourse.nodered.org/t/ds1990-1-wire-support/81104 "2023-09-08T06:31:19Z")

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Good afternoon community, I am busy looking at DS1990A Serial Number i-buttons. My test hardware is running on a Pi W and node-red 3.0.2. I see there is a # node-red-contrib-1wire node that supports the 1-wire DS18B20 …

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## [How to make Node-RED use a manually cloned github project as active project?](https://discourse.nodered.org/t/how-to-make-node-red-use-a-manually-cloned-github-project-as-active-project/19346)

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**Author:** [@janvda](https://discourse.nodered.org/u/janvda)\
**Replies:** 1\
**Last updated:** [7 September 2023 23:15 UTC](https://discourse.nodered.org/t/how-to-make-node-red-use-a-manually-cloned-github-project-as-active-project/19346 "2023-09-07T23:15:52Z")

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I have created a Node-RED project using the Node-RED project feature which I also pushed to github. Now, I want to use this project on another device where Node-RED is installed without using the Node-RED editor to clon…

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## [HA date data capture](https://discourse.nodered.org/t/ha-date-data-capture/81111)

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**Author:** [@fAdell87](https://discourse.nodered.org/u/fAdell87)\
**Replies:** 7\
**Last updated:** [7 September 2023 19:22 UTC](https://discourse.nodered.org/t/ha-date-data-capture/81111 "2023-09-07T19:22:34Z")

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Hello, before making the post I searched for information but I couldn't find a solution. I have modified the config.js document with " process.env.TZ = "Europe/Madrid";" But I can't get the solution. When capturing a …

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## [Hi can we connect bl20 e gateway in nodered](https://discourse.nodered.org/t/hi-can-we-connect-bl20-e-gateway-in-nodered/81098)

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**Author:** [@m.shivu](https://discourse.nodered.org/u/m.shivu)\
**Replies:** 2\
**Last updated:** [7 September 2023 14:15 UTC](https://discourse.nodered.org/t/hi-can-we-connect-bl20-e-gateway-in-nodered/81098 "2023-09-07T14:15:59Z")

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i have try to get data from the bl20 e rfid reader how can i get it

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## [Arlo baby camera](https://discourse.nodered.org/t/arlo-baby-camera/81108)

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**Author:** [@madmax](https://discourse.nodered.org/u/madmax)\
**Replies:** 0\
**Last updated:** [7 September 2023 13:31 UTC](https://discourse.nodered.org/t/arlo-baby-camera/81108 "2023-09-07T13:31:35Z")

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Hello! Has anyone ever integrated an arlo baby camera into Node red. Unfortunately I can't find anything about whether it works or how. I hope someone can help me.

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## [Issues with Sensor Presence Detection and Opacity Changes](https://discourse.nodered.org/t/issues-with-sensor-presence-detection-and-opacity-changes/81107)

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**Author:** [@Asiayqyyq](https://discourse.nodered.org/u/Asiayqyyq)\
**Replies:** 0\
**Last updated:** [7 September 2023 13:29 UTC](https://discourse.nodered.org/t/issues-with-sensor-presence-detection-and-opacity-changes/81107 "2023-09-07T13:29:02Z")

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Hello, I send a JSON object every second to detect the presence of a sensor, but I've encountered a few issues. When the sensor is present, I want the opacity to be 1; otherwise, it should be 0,1 . My problems are that t…

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## [Whats wrong here with getting enviroment variables?](https://discourse.nodered.org/t/whats-wrong-here-with-getting-enviroment-variables/81105)

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**Author:** [@haegar33](https://discourse.nodered.org/u/haegar33)\
**Replies:** 1\
**Last updated:** [7 September 2023 13:19 UTC](https://discourse.nodered.org/t/whats-wrong-here-with-getting-enviroment-variables/81105 "2023-09-07T13:19:10Z")

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Just updated to V3.1 and now, for the first time, wanna try to use global enviroment variables. But I am already stucked with this first example. Output is nil or undefined An enviroment variable NAME has been defined v…

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## [Clear deployed flows](https://discourse.nodered.org/t/clear-deployed-flows/81017)

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**Author:** [@juggler](https://discourse.nodered.org/u/juggler)\
**Replies:** 4\
**Last updated:** [7 September 2023 11:45 UTC](https://discourse.nodered.org/t/clear-deployed-flows/81017 "2023-09-07T11:45:45Z")

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I am new to node-red so I may be missing something. I could not find an answer in the documentation or searching the forum. So help is needed. It is really 2 questions: Within the editor how can I clear the runtime …

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