# Latest

**URL:** https://discourse.nodered.org/latest.md?page=597

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

**Page:** 598

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## [MQTT json file to influxdb](https://discourse.nodered.org/t/mqtt-json-file-to-influxdb/60634)

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**Author:** [@MaxJ](https://discourse.nodered.org/u/MaxJ)\
**Replies:** 8\
**Last updated:** [1 April 2022 11:20 UTC](https://discourse.nodered.org/t/mqtt-json-file-to-influxdb/60634 "2022-04-01T11:20:53Z")

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Hello! Im trying to send a JSON with data over MQTT which i convert to a javascript object and then send to influxDB which will later go to my grafana. However when i insert my data in influx the values come in as strin…

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## [Strange error in eztimer, "Call-Service attempted without connection to server" in debug window](https://discourse.nodered.org/t/strange-error-in-eztimer-call-service-attempted-without-connection-to-server-in-debug-window/59874)

<div class="topic-metadata">

**Author:** [@pimmen85](https://discourse.nodered.org/u/pimmen85)\
**Replies:** 2\
**Last updated:** [1 April 2022 10:28 UTC](https://discourse.nodered.org/t/strange-error-in-eztimer-call-service-attempted-without-connection-to-server-in-debug-window/59874 "2022-04-01T10:28:45Z")

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my automation looks like this, it says "Call-Service attempted without connection to server." in the debug window. Home assistant server is correctly configured and i only have one instance.

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## [Activate flow with QR code from internet](https://discourse.nodered.org/t/activate-flow-with-qr-code-from-internet/60642)

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**Author:** [@nodenewbie](https://discourse.nodered.org/u/nodenewbie)\
**Replies:** 0\
**Last updated:** [1 April 2022 10:00 UTC](https://discourse.nodered.org/t/activate-flow-with-qr-code-from-internet/60642 "2022-04-01T10:00:25Z")

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Hello! I have a disco ball connected to smart switches/lights, and I want people on the street to be able to turn it on by visiting a website through a QR code. I tried using ikea buttons but they keep getting stolen! B…

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## [Get filename of created files from exec](https://discourse.nodered.org/t/get-filename-of-created-files-from-exec/60599)

<div class="topic-metadata">

**Author:** [@smitterer](https://discourse.nodered.org/u/smitterer)\
**Replies:** 7\
**Last updated:** [1 April 2022 09:31 UTC](https://discourse.nodered.org/t/get-filename-of-created-files-from-exec/60599 "2022-04-01T09:31:25Z")

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Hi! I have a java program which is triggered by the exec node. The output of it are several files with different names. (automatically generated with timestamp in the name) How would I get these names, then transfer t…

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## [Login, sessions, cookies, scraping](https://discourse.nodered.org/t/login-sessions-cookies-scraping/60636)

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**Author:** [@ketpa](https://discourse.nodered.org/u/ketpa)\
**Replies:** 0\
**Last updated:** [1 April 2022 08:12 UTC](https://discourse.nodered.org/t/login-sessions-cookies-scraping/60636 "2022-04-01T08:12:55Z")

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I try to scrape page. When I login, and copy header, and send post to website, I have data from website, but only about 15 minutes. After 15 minutes session close and I haven't access to site. I try to login to page. W…

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## [Reading a USB nfc/rfid reader into node red](https://discourse.nodered.org/t/reading-a-usb-nfc-rfid-reader-into-node-red/60629)

<div class="topic-metadata">

**Author:** [@John\_Barry](https://discourse.nodered.org/u/John_Barry)\
**Replies:** 0\
**Last updated:** [1 April 2022 07:20 UTC](https://discourse.nodered.org/t/reading-a-usb-nfc-rfid-reader-into-node-red/60629 "2022-04-01T07:20:59Z")

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Hi, I am building a product with a thin client pc (running Ubuntu) and node red. Currently i have a generic usb RFID reader The problem is this reader acts like an HID device so my terrible workaround has been to add…

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## [OPC UA unsubscribe not working properly sometimes](https://discourse.nodered.org/t/opc-ua-unsubscribe-not-working-properly-sometimes/60628)

<div class="topic-metadata">

**Author:** [@dinesh](https://discourse.nodered.org/u/dinesh)\
**Replies:** 0\
**Last updated:** [1 April 2022 07:16 UTC](https://discourse.nodered.org/t/opc-ua-unsubscribe-not-working-properly-sometimes/60628 "2022-04-01T07:16:48Z")

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Hi, I'm using OPC UA in my node red. I am using the action 'INFO' in my OPC UA client. I want to use info because it allows me to subscribe and unsubscribe. However, sometimes when I select unsubscribe, the OPC UA clie…

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## [Ical / Get the tomorrow's first and last even](https://discourse.nodered.org/t/ical-get-the-tomorrows-first-and-last-even/60620)

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**Author:** [@Lafayette](https://discourse.nodered.org/u/Lafayette)\
**Replies:** 6\
**Last updated:** [1 April 2022 01:23 UTC](https://discourse.nodered.org/t/ical-get-the-tomorrows-first-and-last-even/60620 "2022-04-01T01:23:33Z")

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Hi, I'd like to know how you would do to get the tomorrow first and the last events in a ical which I get with node-red-contrib-ical-events every day Thx

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## [TEST MOCHA, got error "a.filter is not a function"](https://discourse.nodered.org/t/test-mocha-got-error-a-filter-is-not-a-function/60612)

<div class="topic-metadata">

**Author:** [@rita7](https://discourse.nodered.org/u/rita7)\
**Replies:** 1\
**Last updated:** [31 March 2022 22:07 UTC](https://discourse.nodered.org/t/test-mocha-got-error-a-filter-is-not-a-function/60612 "2022-03-31T22:07:44Z")

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I try use MOCHA test. Need remove dublicate words in array. It my test. I got errors "TypeError: a.filter is not a function at removeDuplicateWords (test.js:3:14) at Context. (test.js:16:24) at processImmediate (inter…

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## [String zu JSON, some problems with the string](https://discourse.nodered.org/t/string-zu-json-some-problems-with-the-string/60617)

<div class="topic-metadata">

**Author:** [@hohmannc](https://discourse.nodered.org/u/hohmannc)\
**Replies:** 2\
**Last updated:** [31 March 2022 20:47 UTC](https://discourse.nodered.org/t/string-zu-json-some-problems-with-the-string/60617 "2022-03-31T20:47:11Z")

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Hello I try to form a string to a json and I need to replace some chars in the request. The error seem to at this part: from debug: "rssi":"{WEB\_MSG\_STRONG}→9", (short version) "rssi":"{WEB\_MSG\_STRONG} 9" (long versio…

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## [Refresh ui-node](https://discourse.nodered.org/t/refresh-ui-node/13921)

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**Author:** [@fellinga](https://discourse.nodered.org/u/fellinga)\
**Replies:** 40\
**Last updated:** [31 March 2022 20:35 UTC](https://discourse.nodered.org/t/refresh-ui-node/13921 "2022-03-31T20:35:09Z")

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Hello, I am developing a node that lets the user modify an incoming msg.payload via the UI (html table). By clicking the "save" button - this payload is being sent to the output. This works great so far and the user ca…

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## [No response from TCP request](https://discourse.nodered.org/t/no-response-from-tcp-request/60597)

<div class="topic-metadata">

**Author:** [@nygma2004](https://discourse.nodered.org/u/nygma2004)\
**Replies:** 6\
**Last updated:** [31 March 2022 19:17 UTC](https://discourse.nodered.org/t/no-response-from-tcp-request/60597 "2022-03-31T19:17:23Z")

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I have a home automation server that I can communicate with simply using a TCP connection. When I test it in putty, it looks simple: I send GET 1 and I get the data back for device 1, I send GET 2 and get the data fo…

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## [File Upload through Uibuilder NodeRED Interface](https://discourse.nodered.org/t/file-upload-through-uibuilder-nodered-interface/60337)

<div class="topic-metadata">

**Author:** [@stefanoanzilotti](https://discourse.nodered.org/u/stefanoanzilotti)\
**Replies:** 13\
**Last updated:** [31 March 2022 18:29 UTC](https://discourse.nodered.org/t/file-upload-through-uibuilder-nodered-interface/60337 "2022-03-31T18:29:04Z")

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Dear all, First of all, a little introduction to my system. I am using a docker container to run several services, one of them is obviously NodeRED. here I use an amazing node-red-contrib-uibuilder to pull up my inter…

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## [Editor notification if nodejs version is too old](https://discourse.nodered.org/t/editor-notification-if-nodejs-version-is-too-old/59569)

<div class="topic-metadata">

**Author:** [@Colin](https://discourse.nodered.org/u/Colin)\
**Replies:** 1\
**Last updated:** [18 March 2022 15:05 UTC](https://discourse.nodered.org/t/editor-notification-if-nodejs-version-is-too-old/59569 "2022-03-18T15:05:44Z")

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There have been a couple of threads on the forum recently with users running node-red 2.x with nodejs version below 12, which gives various run time issues which may not be easy to diagnose. See this thread for example,…

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## [Forwarding a message to any node](https://discourse.nodered.org/t/forwarding-a-message-to-any-node/60501)

<div class="topic-metadata">

**Author:** [@Tonna100](https://discourse.nodered.org/u/Tonna100)\
**Replies:** 10\
**Last updated:** [31 March 2022 14:17 UTC](https://discourse.nodered.org/t/forwarding-a-message-to-any-node/60501 "2022-03-31T14:17:09Z")

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Hi everyone. I apologize in advance for my bad English. I have been working with Node-red for a long time and have not come across this issue before. Now I really need your help, dear community members. I need to forwar…

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## [How can I remove the quotation marks from the values in the print screen](https://discourse.nodered.org/t/how-can-i-remove-the-quotation-marks-from-the-values-in-the-print-screen/60579)

<div class="topic-metadata">

**Author:** [@murraa](https://discourse.nodered.org/u/murraa)\
**Replies:** 3\
**Last updated:** [31 March 2022 14:07 UTC](https://discourse.nodered.org/t/how-can-i-remove-the-quotation-marks-from-the-values-in-the-print-screen/60579 "2022-03-31T14:07:28Z")

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Hello everyone, I have a question, how can I remove the quotation marks from the values ​​in the print screen Thanks for your answers

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## [Update a record in MSSQL](https://discourse.nodered.org/t/update-a-record-in-mssql/60588)

<div class="topic-metadata">

**Author:** [@kvramji](https://discourse.nodered.org/u/kvramji)\
**Replies:** 0\
**Last updated:** [31 March 2022 11:57 UTC](https://discourse.nodered.org/t/update-a-record-in-mssql/60588 "2022-03-31T11:57:31Z")

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I am working with a couple of Arduino nano boards and node red installed on a windows server. I have node red running as expected, installed the SQL express edition on it and have successfully managed to figure out how t…

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## [Node-red . MQTT \[HELP\]](https://discourse.nodered.org/t/node-red-mqtt-help/60575)

<div class="topic-metadata">

**Author:** [@Andhuooo](https://discourse.nodered.org/u/Andhuooo)\
**Replies:** 2\
**Last updated:** [31 March 2022 11:50 UTC](https://discourse.nodered.org/t/node-red-mqtt-help/60575 "2022-03-31T11:50:44Z")

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Is there any way to retain the incoming data from MQTT, When the node-red running pc is off ?

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## [Long running process, waiting for a response via a message broker](https://discourse.nodered.org/t/long-running-process-waiting-for-a-response-via-a-message-broker/60511)

<div class="topic-metadata">

**Author:** [@lebowen](https://discourse.nodered.org/u/lebowen)\
**Replies:** 8\
**Last updated:** [31 March 2022 08:49 UTC](https://discourse.nodered.org/t/long-running-process-waiting-for-a-response-via-a-message-broker/60511 "2022-03-31T08:49:16Z")

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I'm hoping to use node-red to set up some audio processing for a project I am working on. I have a service which takes some audio and performs some processing on it, this can take up to 30 minutes. I was planning to writ…

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## [Octoprint rest API](https://discourse.nodered.org/t/octoprint-rest-api/10746)

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**Author:** [@davidcgu](https://discourse.nodered.org/u/davidcgu)\
**Replies:** 9\
**Last updated:** [31 March 2022 06:05 UTC](https://discourse.nodered.org/t/octoprint-rest-api/10746 "2022-03-31T06:05:23Z")

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Did anybody made some work with octoprint rest API? I'm monitoring some data through MQTT but having rest API is plenty f integration possibilities however I have no idea how that works and will be nice to have some flo…

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## [Telegram gives false alarms](https://discourse.nodered.org/t/telegram-gives-false-alarms/60551)

<div class="topic-metadata">

**Author:** [@fugit185](https://discourse.nodered.org/u/fugit185)\
**Replies:** 8\
**Last updated:** [31 March 2022 05:17 UTC](https://discourse.nodered.org/t/telegram-gives-false-alarms/60551 "2022-03-31T05:17:17Z")

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I have multiple alarms which are send to telegram in my phone. They have been working nicely but roughly one month ago I started to get false alarms. I don't know where to start troubleshooting?

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## [Flow variables overwritten](https://discourse.nodered.org/t/flow-variables-overwritten/60548)

<div class="topic-metadata">

**Author:** [@guga-mattos](https://discourse.nodered.org/u/guga-mattos)\
**Replies:** 4\
**Last updated:** [30 March 2022 20:57 UTC](https://discourse.nodered.org/t/flow-variables-overwritten/60548 "2022-03-30T20:57:47Z")

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I built a small program with telegram node that makes queries into a database and return it correctly at this time. There are some options on what to query and each one I have created a subflow to get things organized. …

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## [Table using Array groups and Timestamps](https://discourse.nodered.org/t/table-using-array-groups-and-timestamps/60558)

<div class="topic-metadata">

**Author:** [@DemalCal96](https://discourse.nodered.org/u/DemalCal96)\
**Replies:** 0\
**Last updated:** [30 March 2022 19:12 UTC](https://discourse.nodered.org/t/table-using-array-groups-and-timestamps/60558 "2022-03-30T19:12:03Z")

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Hello, I have a small problem. I am receiving by MQTT some arrays that have quite a lot of elements (about 2000). I get 4 of these arrays within 5 minutes. What I want is that these 4 arrays are each in a column of a tab…

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## [Mitsubishi MC Node read and Function Node help](https://discourse.nodered.org/t/mitsubishi-mc-node-read-and-function-node-help/60546)

<div class="topic-metadata">

**Author:** [@jts450](https://discourse.nodered.org/u/jts450)\
**Replies:** 0\
**Last updated:** [30 March 2022 14:54 UTC](https://discourse.nodered.org/t/mitsubishi-mc-node-read-and-function-node-help/60546 "2022-03-30T14:54:15Z")

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Sorry for the simple question here but I am still trying to learn JSON and need some help with the code for the function node. I want to poll the MC read node every .1 second (PLC out put is set to 500ms and I don't wan…

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## [Node-Red stopping process to early](https://discourse.nodered.org/t/node-red-stopping-process-to-early/60433)

<div class="topic-metadata">

**Author:** [@smitterer](https://discourse.nodered.org/u/smitterer)\
**Replies:** 25\
**Last updated:** [30 March 2022 18:45 UTC](https://discourse.nodered.org/t/node-red-stopping-process-to-early/60433 "2022-03-30T18:45:16Z")

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Hi! I'm struggling with the following: I'm using NR to get a csv from a FTP server, run a java program via exec (using command "ant") and then transfer the output file to another FTP. When I run ant directly via ssh o…

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## [Worldmap how to make markers persist indefinitely](https://discourse.nodered.org/t/worldmap-how-to-make-markers-persist-indefinitely/60533)

<div class="topic-metadata">

**Author:** [@L0uisc](https://discourse.nodered.org/u/L0uisc)\
**Replies:** 1\
**Last updated:** [30 March 2022 18:33 UTC](https://discourse.nodered.org/t/worldmap-how-to-make-markers-persist-indefinitely/60533 "2022-03-30T18:33:44Z")

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Hi! I'm looking at using the worldmap node to display some location data. I can display the markers on the map, however, the worldmap block removes them after some time. How can I get them to persist as long as the page …

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## [Hello everyone pls some help](https://discourse.nodered.org/t/hello-everyone-pls-some-help/60265)

<div class="topic-metadata">

**Author:** [@Sheeen](https://discourse.nodered.org/u/Sheeen)\
**Replies:** 40\
**Last updated:** [30 March 2022 18:14 UTC](https://discourse.nodered.org/t/hello-everyone-pls-some-help/60265 "2022-03-30T18:14:25Z")

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Hello everyone :relaxed: pls could anyone help me cause I'm really stuck I have an esp8266 paired with dht11 it measured temperature in the room and send to a raspberry pi 3 through the mqtt broker my main problem is I w…

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## [Node dashboard size error](https://discourse.nodered.org/t/node-dashboard-size-error/60547)

<div class="topic-metadata">

**Author:** [@rootrain82](https://discourse.nodered.org/u/rootrain82)\
**Replies:** 1\
**Last updated:** [30 March 2022 15:51 UTC](https://discourse.nodered.org/t/node-dashboard-size-error/60547 "2022-03-30T15:51:38Z")

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When I increase the width to 50, several icons and buttons do not work.

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## [Creating an alert - best programing practice?](https://discourse.nodered.org/t/creating-an-alert-best-programing-practice/60517)

<div class="topic-metadata">

**Author:** [@molsonb](https://discourse.nodered.org/u/molsonb)\
**Replies:** 6\
**Last updated:** [30 March 2022 15:21 UTC](https://discourse.nodered.org/t/creating-an-alert-best-programing-practice/60517 "2022-03-30T15:21:14Z")

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I have a programming question, which way is the more efficient way to code. I have an alert when a temperature reaches a certain value and only alerts me when a boolean to turn "On" for the monitoring. Should I start wi…

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## [Subflow: set confignode by parameter](https://discourse.nodered.org/t/subflow-set-confignode-by-parameter/60543)

<div class="topic-metadata">

**Author:** [@psmtvdw](https://discourse.nodered.org/u/psmtvdw)\
**Replies:** 2\
**Last updated:** [30 March 2022 14:59 UTC](https://discourse.nodered.org/t/subflow-set-confignode-by-parameter/60543 "2022-03-30T14:59:12Z")

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Hi, say I want to use a subflow and re-use this multiple times. One of the nodes inside the subflow is a node that uses a configuration node (for instance sql node, opc-ua node, influxdb node...) Can I set this configu…

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