# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=474

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

**Page:** 475

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## [NodeRed Admin API - Example how to use](https://discourse.nodered.org/t/nodered-admin-api-example-how-to-use/53096)

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**Author:** [@raid2light](https://discourse.nodered.org/u/raid2light)\
**Replies:** 1\
**Last updated:** [1 November 2021 23:34 UTC](https://discourse.nodered.org/t/nodered-admin-api-example-how-to-use/53096 "2021-11-01T23:34:30Z")

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Hi, are there any examples on how to invoke Node RED Admin API - how can one modify their flows on the fly with this API? Is this possible from command line and where are examples of this? If I export flows into JSON for…

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## [What is the published format for storing NodeRED graph to a file?](https://discourse.nodered.org/t/what-is-the-published-format-for-storing-nodered-graph-to-a-file/52794)

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**Author:** [@raid2light](https://discourse.nodered.org/u/raid2light)\
**Replies:** 8\
**Last updated:** [1 November 2021 22:57 UTC](https://discourse.nodered.org/t/what-is-the-published-format-for-storing-nodered-graph-to-a-file/52794 "2021-11-01T22:57:44Z")

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Hi, I'm wondering if there is published format on how NodeRED stores its visual node representation into a file (serializes graph GUI into a file in JSON format). So is it possible to manually create such file (by writti…

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## [Working with data in an array](https://discourse.nodered.org/t/working-with-data-in-an-array/53004)

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**Author:** [@Romprod](https://discourse.nodered.org/u/Romprod)\
**Replies:** 14\
**Last updated:** [1 November 2021 22:00 UTC](https://discourse.nodered.org/t/working-with-data-in-an-array/53004 "2021-11-01T22:00:07Z")

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Hey guys and gals. I'm currently scraping a website to get football stats. I've been able to most of the formatting etc and move the data in to fields but I need a bit of help understanding how to finish it off. Curren…

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## [Trying to use MQTT node for first time, won't connect. Just stuck on connecting w/ yellow square icon](https://discourse.nodered.org/t/trying-to-use-mqtt-node-for-first-time-wont-connect-just-stuck-on-connecting-w-yellow-square-icon/53090)

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**Author:** [@YellowSharkMT](https://discourse.nodered.org/u/YellowSharkMT)\
**Replies:** 2\
**Last updated:** [1 November 2021 21:58 UTC](https://discourse.nodered.org/t/trying-to-use-mqtt-node-for-first-time-wont-connect-just-stuck-on-connecting-w-yellow-square-icon/53090 "2021-11-01T21:58:53Z")

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Hi there, I'm pretty new to NR so this is probably something very obvious/easy. I'm running an mqtt instance on my local network, but I can't seem to connect to it from NR. This instance definitely works - I can pub/sub…

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## [Problem with upgrading](https://discourse.nodered.org/t/problem-with-upgrading/53032)

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**Author:** [@Glake01](https://discourse.nodered.org/u/Glake01)\
**Replies:** 7\
**Last updated:** [1 November 2021 21:41 UTC](https://discourse.nodered.org/t/problem-with-upgrading/53032 "2021-11-01T21:41:56Z")

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This a follow-on to the topic Problem with multiple context stores Node Red was working ok on that RPi after the upgrade but since I couldn't be sure that the residual node.js v10.24.1 wouldn't cause problems in the fu…

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## [RPI GPIOs showing as not available after some updates. Tried everything](https://discourse.nodered.org/t/rpi-gpios-showing-as-not-available-after-some-updates-tried-everything/53019)

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**Author:** [@coppo23](https://discourse.nodered.org/u/coppo23)\
**Replies:** 4\
**Last updated:** [31 October 2021 19:41 UTC](https://discourse.nodered.org/t/rpi-gpios-showing-as-not-available-after-some-updates-tried-everything/53019 "2021-10-31T19:41:02Z")

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Hi I have just updated my rpi node red install, using a script - now 1.3.5. Ran through all the errors corrected them, and had to reinstall various items on the palette. Everything is now good except GPIO pins. Even I2c…

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## [Http in timed out](https://discourse.nodered.org/t/http-in-timed-out/53080)

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**Author:** [@tomtom30](https://discourse.nodered.org/u/tomtom30)\
**Replies:** 2\
**Last updated:** [1 November 2021 17:40 UTC](https://discourse.nodered.org/t/http-in-timed-out/53080 "2021-11-01T17:40:15Z")

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Hi, I have a problem with Http in node. I get timeout response on client but I receive the message correctly. I don't understand why? Can you help? My environment : nodered on docker swarm through traefik. here is…

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## [Trigger-time depending on date](https://discourse.nodered.org/t/trigger-time-depending-on-date/53042)

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**Author:** [@BayerSe](https://discourse.nodered.org/u/BayerSe)\
**Replies:** 2\
**Last updated:** [1 November 2021 17:00 UTC](https://discourse.nodered.org/t/trigger-time-depending-on-date/53042 "2021-11-01T17:00:38Z")

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Hi, I'd like to automate our shutters. In particular, I'd like to have opening- and closing times varying over the year. I could of course try to use solar events, but so far I did not really find a satisfying setting a…

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## [sessionExpiryTime for UI interface](https://discourse.nodered.org/t/sessionexpirytime-for-ui-interface/53075)

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**Author:** [@ffich](https://discourse.nodered.org/u/ffich)\
**Replies:** 6\
**Last updated:** [1 November 2021 16:43 UTC](https://discourse.nodered.org/t/sessionexpirytime-for-ui-interface/53075 "2021-11-01T16:43:19Z")

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Hi, is there a way for changing the session expiry time for the UI in NR 2.x?. The sessionExpiryTime option works perfectly fine for the editor interface, but I've noticed it does not affect the UI (or either I'm not us…

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## [Error in formatting data for a chart](https://discourse.nodered.org/t/error-in-formatting-data-for-a-chart/53074)

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**Author:** [@FeliceM](https://discourse.nodered.org/u/FeliceM)\
**Replies:** 10\
**Last updated:** [1 November 2021 15:56 UTC](https://discourse.nodered.org/t/error-in-formatting-data-for-a-chart/53074 "2021-11-01T15:56:41Z")

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I am trying to plot an XY chart but I keep getting this error and I am not sure how to fix it. This is my flow: \[{"id":"09b0f6b095ce5f87","type":"smooth","z":"55ad5ee6a30d9819","name":"","property":"payload","action"…

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## [Can send e-mail but the message is undefined](https://discourse.nodered.org/t/can-send-e-mail-but-the-message-is-undefined/53021)

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**Author:** [@KrisJeff](https://discourse.nodered.org/u/KrisJeff)\
**Replies:** 9\
**Last updated:** [1 November 2021 14:44 UTC](https://discourse.nodered.org/t/can-send-e-mail-but-the-message-is-undefined/53021 "2021-11-01T14:44:14Z")

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Can send a basic e-mail from the e-mail out node. Upon receiving the e-mail I get the Topic and no message. However, I just get "undefined"? This is the simplest of flows and should work as per examples? Help!

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## [Html change button name](https://discourse.nodered.org/t/html-change-button-name/53064)

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**Author:** [@danieleronchi](https://discourse.nodered.org/u/danieleronchi)\
**Replies:** 2\
**Last updated:** [1 November 2021 13:47 UTC](https://discourse.nodered.org/t/html-change-button-name/53064 "2021-11-01T13:47:14Z")

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Goodmorning everyone, I recently found Node-Red and I think it's amazing! I created a little project with an html table that works perfectly. I use Node-RED version: v2.1.1 and Node.js version: v14.18.1 Now I've a p…

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## [Owntrack - show GPS Position on Worldmap](https://discourse.nodered.org/t/owntrack-show-gps-position-on-worldmap/53071)

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**Author:** [@newman-juergen](https://discourse.nodered.org/u/newman-juergen)\
**Replies:** 0\
**Last updated:** [1 November 2021 13:46 UTC](https://discourse.nodered.org/t/owntrack-show-gps-position-on-worldmap/53071 "2021-11-01T13:46:29Z")

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Hello Community, I would like to display the GPS position of a smartphone on a world map. The whole thing also works fine with Owntracks and worldmap-node. by default, world map component will only display real-time i…

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## [Pi as Bacnet device](https://discourse.nodered.org/t/pi-as-bacnet-device/52999)

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**Author:** [@Jurg1505](https://discourse.nodered.org/u/Jurg1505)\
**Replies:** 1\
**Last updated:** [1 November 2021 13:33 UTC](https://discourse.nodered.org/t/pi-as-bacnet-device/52999 "2021-11-01T13:33:07Z")

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The goal is to have a pi as a Bacnet device. So the pi can be read by a plc or another pi I have tried node-red-contrib-bacnet but there is no "I am" Has someone made succesfully a pi as Bacnet device and how ?

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## [Log out from node red flow](https://discourse.nodered.org/t/log-out-from-node-red-flow/18729)

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**Author:** [@pranavthakkar](https://discourse.nodered.org/u/pranavthakkar)\
**Replies:** 15\
**Last updated:** [1 November 2021 13:20 UTC](https://discourse.nodered.org/t/log-out-from-node-red-flow/18729 "2021-11-01T13:20:28Z")

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Hi there I want to set time for logging out from node red flow automatically after some seconds. and How can i set that after every boot node red prompt for user login?

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## [Working with JSON or XML](https://discourse.nodered.org/t/working-with-json-or-xml/53059)

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**Author:** [@brian](https://discourse.nodered.org/u/brian)\
**Replies:** 2\
**Last updated:** [1 November 2021 11:26 UTC](https://discourse.nodered.org/t/working-with-json-or-xml/53059 "2021-11-01T11:26:11Z")

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Hi all A noob question I have this unit that sends a JSON or XML file to a server which works fine (but a somewhat pricey solution) . i would like to make a more simpel solution to this using node red. I know that i…

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## [Node-red-contrib-influxdb, select with absolute time range ERROR](https://discourse.nodered.org/t/node-red-contrib-influxdb-select-with-absolute-time-range-error/52981)

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**Author:** [@henkkas](https://discourse.nodered.org/u/henkkas)\
**Replies:** 13\
**Last updated:** [1 November 2021 10:31 UTC](https://discourse.nodered.org/t/node-red-contrib-influxdb-select-with-absolute-time-range-error/52981 "2021-11-01T10:31:39Z")

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Pls Help, I am trying to get data from a table in influx database with a query. Query is passed through influxDB in node. In the query I use WHERE condition with a variable absolute time range which can be manipulated. …

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## [Error Installing node-red-node-serialport 0.14.1](https://discourse.nodered.org/t/error-installing-node-red-node-serialport-0-14-1/53011)

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**Author:** [@eddee54455](https://discourse.nodered.org/u/eddee54455)\
**Replies:** 3\
**Last updated:** [1 November 2021 10:26 UTC](https://discourse.nodered.org/t/error-installing-node-red-node-serialport-0-14-1/53011 "2021-11-01T10:26:02Z")

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Hi Guys, After a forced O/S reload (where has the internet gone during an OS update), I am having a problem installing node-red-node-serialport 0.14.1 Here is the console log: ----------------------------------------…

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## [How to use msg.baudrate to set the baud rate for the serial request in node-red-node-serialport](https://discourse.nodered.org/t/how-to-use-msg-baudrate-to-set-the-baud-rate-for-the-serial-request-in-node-red-node-serialport/52919)

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**Author:** [@yfhzs](https://discourse.nodered.org/u/yfhzs)\
**Replies:** 10\
**Last updated:** [1 November 2021 09:58 UTC](https://discourse.nodered.org/t/how-to-use-msg-baudrate-to-set-the-baud-rate-for-the-serial-request-in-node-red-node-serialport/52919 "2021-11-01T09:58:20Z")

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How to use msg.baudrate to set the baud rate for the serial request in node-red-node-serialport has been tested many times but failed. Please give me your advice，thank you.

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## [SIM7000, GPS, convert Lat and Long to NMEA-String](https://discourse.nodered.org/t/sim7000-gps-convert-lat-and-long-to-nmea-string/53022)

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**Author:** [@MichaelLE](https://discourse.nodered.org/u/MichaelLE)\
**Replies:** 2\
**Last updated:** [1 November 2021 10:00 UTC](https://discourse.nodered.org/t/sim7000-gps-convert-lat-and-long-to-nmea-string/53022 "2021-11-01T10:00:08Z")

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Hello, I know, that the normal way is from NMEA-string to lat and long. But my SIM7000 extracts lat and long and I need NMEA (NMEA-GPRMC) to be send to an existing GPS-server. Unfortunatly I can´t find anything about …

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## [Message Trigger for door contact](https://discourse.nodered.org/t/message-trigger-for-door-contact/53044)

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**Author:** [@newman-juergen](https://discourse.nodered.org/u/newman-juergen)\
**Replies:** 2\
**Last updated:** [1 November 2021 08:59 UTC](https://discourse.nodered.org/t/message-trigger-for-door-contact/53044 "2021-11-01T08:59:29Z")

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Hi Community, I need your help. I have a door contact (open = 1, closed = 0). I would like to generate a message when the door is open for 30 minutes. If the door is closed again within 30 minutes, nothing should happ…

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## [List of supported msg objects](https://discourse.nodered.org/t/list-of-supported-msg-objects/53033)

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**Author:** [@Mick](https://discourse.nodered.org/u/Mick)\
**Replies:** 2\
**Last updated:** [1 November 2021 08:44 UTC](https://discourse.nodered.org/t/list-of-supported-msg-objects/53033 "2021-11-01T08:44:02Z")

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Is there a resource that lists all the msg objects that are built into Node-RED. I love perusing this fourm and I always see new objects I never knew existed. It would be nice if there was a list of supported nodes /…

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## [Sound problems with my Halloween props](https://discourse.nodered.org/t/sound-problems-with-my-halloween-props/53001)

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**Author:** [@Frode](https://discourse.nodered.org/u/Frode)\
**Replies:** 6\
**Last updated:** [1 November 2021 08:11 UTC](https://discourse.nodered.org/t/sound-problems-with-my-halloween-props/53001 "2021-11-01T08:11:15Z")

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My Raspberry Pi wont play sounds in node red. If i repeat the input may times manually (by tapping the node), it plays the sound some times. I made a node to repeatedly send inputs, so if I for instance set this to send…

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## [Problem with multiple context stores](https://discourse.nodered.org/t/problem-with-multiple-context-stores/52955)

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**Author:** [@Glake01](https://discourse.nodered.org/u/Glake01)\
**Replies:** 27\
**Last updated:** [31 October 2021 21:54 UTC](https://discourse.nodered.org/t/problem-with-multiple-context-stores/52955 "2021-10-31T21:54:36Z")

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I've updgraded an old version of Node Red to version v2.1.1 All nodes seem to be working except the Change node does not give the option for using the different context stores. When Node Red starts, it also does not sh…

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## [GPIO-States and Values in Excel-Dashboard in different Network](https://discourse.nodered.org/t/gpio-states-and-values-in-excel-dashboard-in-different-network/52961)

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**Author:** [@MichaelLE](https://discourse.nodered.org/u/MichaelLE)\
**Replies:** 6\
**Last updated:** [31 October 2021 19:21 UTC](https://discourse.nodered.org/t/gpio-states-and-values-in-excel-dashboard-in-different-network/52961 "2021-10-31T19:21:52Z")

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Hello, as I can´t find an answer, i hope to get some help here. I´m using Node-RED to switch some GPIOs of an EPS32 and to visualize some values (temperature, humidity) in the Node-RED-Dashboard. Works well. Now I hav…

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## [How can i create opc ua hda?](https://discourse.nodered.org/t/how-can-i-create-opc-ua-hda/50952)

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**Author:** [@Pacolofe](https://discourse.nodered.org/u/Pacolofe)\
**Replies:** 1\
**Last updated:** [31 October 2021 15:44 UTC](https://discourse.nodered.org/t/how-can-i-create-opc-ua-hda/50952 "2021-10-31T15:44:05Z")

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Hi, I would like to know if It's possible create a OPC UA HDA server and how. Thanks you!!

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## [PI-PLATES - Assistance](https://discourse.nodered.org/t/pi-plates-assistance/52990)

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**Author:** [@HS10](https://discourse.nodered.org/u/HS10)\
**Replies:** 3\
**Last updated:** [31 October 2021 14:57 UTC](https://discourse.nodered.org/t/pi-plates-assistance/52990 "2021-10-31T14:57:55Z")

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Got Node-Red loaded on and RPI 4. Got the pi-plates palette installed. Has someone have a relay Pi-plate example?

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## [Is there a way to do string - string?](https://discourse.nodered.org/t/is-there-a-way-to-do-string-string/53009)

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**Author:** [@BioKeks](https://discourse.nodered.org/u/BioKeks)\
**Replies:** 2\
**Last updated:** [31 October 2021 13:33 UTC](https://discourse.nodered.org/t/is-there-a-way-to-do-string-string/53009 "2021-10-31T13:33:15Z")

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Hey guys! I have 2 strings in the msg. (first string msg.hello, second msg.cookie) The problem I have is msg.hello contains words that I don't want in msg.hello. msg.cookie contains the words that I want to delete fro…

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## [\[Solved\]Adding quotes around an exec node parameter](https://discourse.nodered.org/t/solved-adding-quotes-around-an-exec-node-parameter/53008)

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**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 3\
**Last updated:** [31 October 2021 12:32 UTC](https://discourse.nodered.org/t/solved-adding-quotes-around-an-exec-node-parameter/53008 "2021-10-31T12:32:24Z")

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I'm wanting to try and use espeak on a Pi for text to speech but having a problem in passing my text with quotes around it If you just use (from a command line) espeak alexa, what is the time then it only says alexa …

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## [Concatenate 2 hex buffer and convert](https://discourse.nodered.org/t/concatenate-2-hex-buffer-and-convert/52980)

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**Author:** [@bolfox](https://discourse.nodered.org/u/bolfox)\
**Replies:** 7\
**Last updated:** [31 October 2021 09:32 UTC](https://discourse.nodered.org/t/concatenate-2-hex-buffer-and-convert/52980 "2021-10-31T09:32:45Z")

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Hi to all, i need to concatenate 2 buffer (first 2, knx.rawValue\[0\] and knx.rawValue\[a\]) in hex like 0x08 + 0xcd, take 08+cd -\> 08cd and convert to decimal 08cd = 2253 then add a , after the first 3 digit to receive a …

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