# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=470

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

**Page:** 471

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## [Local context storage not intended for large data arrays?](https://discourse.nodered.org/t/local-context-storage-not-intended-for-large-data-arrays/53377)

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**Author:** [@metter](https://discourse.nodered.org/u/metter)\
**Replies:** 31\
**Last updated:** [10 November 2021 14:42 UTC](https://discourse.nodered.org/t/local-context-storage-not-intended-for-large-data-arrays/53377 "2021-11-10T14:42:38Z")

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I am storing very large data arrays (about array\[8000\] with some 20+ objects per entry) in the global context storage. I have set context stores to local storage in settings.js. This data is updated every 5mins 24/7. Ev…

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## [Upgrade from 1.2.9 to 2.1.3](https://discourse.nodered.org/t/upgrade-from-1-2-9-to-2-1-3/53446)

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**Author:** [@corso66](https://discourse.nodered.org/u/corso66)\
**Replies:** 14\
**Last updated:** [10 November 2021 14:09 UTC](https://discourse.nodered.org/t/upgrade-from-1-2-9-to-2-1-3/53446 "2021-11-10T14:09:30Z")

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Hi all, I'm afraid to upgrade from 1.2.9 Nodered to 2.1.3. I want to know if there is some node that become not compatible with the last version of node red ? Some things to check before upgrade ? Also, how to delete …

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## [Install nodes behind firewalls](https://discourse.nodered.org/t/install-nodes-behind-firewalls/53480)

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**Author:** [@humphrysr](https://discourse.nodered.org/u/humphrysr)\
**Replies:** 2\
**Last updated:** [10 November 2021 11:21 UTC](https://discourse.nodered.org/t/install-nodes-behind-firewalls/53480 "2021-11-10T11:21:08Z")

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I have a system behind a set of firewalls that block inbound and outbound traffic; specific endpoints and ports will be opened later. Right now flows can be cut and pasted into my new environment. Is there a similar wa…

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## [Worldmap problem after upgrade](https://discourse.nodered.org/t/worldmap-problem-after-upgrade/53472)

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**Author:** [@Ino](https://discourse.nodered.org/u/Ino)\
**Replies:** 3\
**Last updated:** [10 November 2021 10:02 UTC](https://discourse.nodered.org/t/worldmap-problem-after-upgrade/53472 "2021-11-10T10:02:11Z")

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After upgrading the worldmap (ver. 2.17 -\> 2.21) the properties menu is improved. I used the ship navigation in ver. 2.17 with the command : msg.payload = {"command":{"showlayer":"ship nav"}} but this is not working anym…

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## [Help needed with comparing inputs using msg.topic](https://discourse.nodered.org/t/help-needed-with-comparing-inputs-using-msg-topic/52258)

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**Author:** [@KrishnanRavichandran](https://discourse.nodered.org/u/KrishnanRavichandran)\
**Replies:** 10\
**Last updated:** [10 November 2021 09:50 UTC](https://discourse.nodered.org/t/help-needed-with-comparing-inputs-using-msg-topic/52258 "2021-11-10T09:50:30Z")

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I have a system where there are 8 inlet pressure measurements from 8 different channels. In my system, I am trying to maintain the pressure in a range using hysteresis. Here, I want the compressor to switch on even if o…

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## [Visual editor doesn't look right when looking at an array](https://discourse.nodered.org/t/visual-editor-doesnt-look-right-when-looking-at-an-array/53485)

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**Author:** [@cymplecy](https://discourse.nodered.org/u/cymplecy)\
**Replies:** 1\
**Last updated:** [10 November 2021 09:06 UTC](https://discourse.nodered.org/t/visual-editor-doesnt-look-right-when-looking-at-an-array/53485 "2021-11-10T09:06:23Z")

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## [OPCUA Client node statuts shows connecting](https://discourse.nodered.org/t/opcua-client-node-statuts-shows-connecting/53488)

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**Author:** [@RAW](https://discourse.nodered.org/u/RAW)\
**Replies:** 0\
**Last updated:** [10 November 2021 08:47 UTC](https://discourse.nodered.org/t/opcua-client-node-statuts-shows-connecting/53488 "2021-11-10T08:47:06Z")

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Hello Experts, I am facing similar issue mentioned in below topic, anyone has an idea or found solution for this problem? OPCUA Client node always on statuts “Connecting” Any help appreciated. Thanks in advance

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## [Posting messages into a Slack channel from Node-RED](https://discourse.nodered.org/t/posting-messages-into-a-slack-channel-from-node-red/53416)

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**Author:** [@Bryce](https://discourse.nodered.org/u/Bryce)\
**Replies:** 5\
**Last updated:** [10 November 2021 08:17 UTC](https://discourse.nodered.org/t/posting-messages-into-a-slack-channel-from-node-red/53416 "2021-11-10T08:17:14Z")

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Hi there, This is a safety feature for a science lab, I have a flow set up that monitors water flow from a tap (for water cooling chemistry experiments), it is read as a frequency. The whole purpose of it is if the wat…

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## [Loop structure in arrays \[node red\]](https://discourse.nodered.org/t/loop-structure-in-arrays-node-red/53351)

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**Author:** [@wjr1506](https://discourse.nodered.org/u/wjr1506)\
**Replies:** 6\
**Last updated:** [10 November 2021 00:54 UTC](https://discourse.nodered.org/t/loop-structure-in-arrays-node-red/53351 "2021-11-10T00:54:40Z")

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Hey guys! I'm starting to venture into node red and javascript. I have a question, I made a stream that injects a json with arrays and a function that reads them, however, how can I read an array inside another? I hav…

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## [Clarification on context stores please](https://discourse.nodered.org/t/clarification-on-context-stores-please/53467)

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**Author:** [@HarryPottar](https://discourse.nodered.org/u/HarryPottar)\
**Replies:** 4\
**Last updated:** [9 November 2021 21:25 UTC](https://discourse.nodered.org/t/clarification-on-context-stores-please/53467 "2021-11-09T21:25:42Z")

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Hi. Using flow context stores, are these unique for each process. For example: The flow is triggered and flow uses flow context store to keep say count of something, while the flow is running. The flow gets triggered a…

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## [How to write 100 words via node-red-contrib-cip-to-ethernet-ip](https://discourse.nodered.org/t/how-to-write-100-words-via-node-red-contrib-cip-to-ethernet-ip/53403)

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**Author:** [@JbmDk](https://discourse.nodered.org/u/JbmDk)\
**Replies:** 3\
**Last updated:** [9 November 2021 21:24 UTC](https://discourse.nodered.org/t/how-to-write-100-words-via-node-red-contrib-cip-to-ethernet-ip/53403 "2021-11-09T21:24:57Z")

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Hi I have to send 100 words from a Modbus/Tcp device to a ControlLogix plc. I need a way to write data to different tag names in the AB plc via a function node. But as I see it it’s only possible if I add a write node …

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## [Installing Node-Red on VMware Tiny Core](https://discourse.nodered.org/t/installing-node-red-on-vmware-tiny-core/53466)

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**Author:** [@Salarj](https://discourse.nodered.org/u/Salarj)\
**Replies:** 1\
**Last updated:** [9 November 2021 19:37 UTC](https://discourse.nodered.org/t/installing-node-red-on-vmware-tiny-core/53466 "2021-11-09T19:37:01Z")

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Hi Dears could you provide me steps of installing node-red in Tiny Core image in VMWare. Thanks

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## [Shelly 1 temperature add on](https://discourse.nodered.org/t/shelly-1-temperature-add-on/53461)

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**Author:** [@GooSe](https://discourse.nodered.org/u/GooSe)\
**Replies:** 4\
**Last updated:** [9 November 2021 18:43 UTC](https://discourse.nodered.org/t/shelly-1-temperature-add-on/53461 "2021-11-09T18:43:52Z")

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Hi there, I have a shelly 1 running ( switching works with a flow ) and added the temperature add on and 3 sensors. I can see the temps using the shelly url, but can't it to run in node red .... This is my mqtt - shell…

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## [Droplist won't update since new 2.1.0 release](https://discourse.nodered.org/t/droplist-wont-update-since-new-2-1-0-release/53018)

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**Author:** [@ylechasseur](https://discourse.nodered.org/u/ylechasseur)\
**Replies:** 18\
**Last updated:** [9 November 2021 17:52 UTC](https://discourse.nodered.org/t/droplist-wont-update-since-new-2-1-0-release/53018 "2021-11-09T17:52:36Z")

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Hi, I have Something bizarre since the new 2.1.0 version. On each tab, I use a control\_ui to get the active tab to avoid having any unrequired transactions (query DB). It was working nice and since the last update, I …

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## [Input data to Influxdb](https://discourse.nodered.org/t/input-data-to-influxdb/53324)

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**Author:** [@picklerick](https://discourse.nodered.org/u/picklerick)\
**Replies:** 34\
**Last updated:** [9 November 2021 15:04 UTC](https://discourse.nodered.org/t/input-data-to-influxdb/53324 "2021-11-09T15:04:24Z")

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Hi All I have created a flow to pull data from a solar charge controller and send to MQTT then a String node to select the 'voltage' data from the string. I would like to input this data to Influxdb but im stuck on the …

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## [How to filter a value from a mqtt message ](https://discourse.nodered.org/t/how-to-filter-a-value-from-a-mqtt-message/53442)

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**Author:** [@bigluc](https://discourse.nodered.org/u/bigluc)\
**Replies:** 7\
**Last updated:** [9 November 2021 14:58 UTC](https://discourse.nodered.org/t/how-to-filter-a-value-from-a-mqtt-message/53442 "2021-11-09T14:58:57Z")

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Hi I have a question and I want to separate the value of temperature from this MQTT message."{"Time": "2021-11-09T10:25:12", "COUNTER":{"C1":20701}, "DS18B20":{"Id": "01193555EC2D", "Temperature":20.3}, "TempUnit": "C"}"…

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## [Node Red - R Pi sensor](https://discourse.nodered.org/t/node-red-r-pi-sensor/53116)

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**Author:** [@sefaguntepe](https://discourse.nodered.org/u/sefaguntepe)\
**Replies:** 20\
**Last updated:** [9 November 2021 14:30 UTC](https://discourse.nodered.org/t/node-red-r-pi-sensor/53116 "2021-11-09T14:30:07Z")

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Hello, I am using Node-red over "Pi". I have the "dht21-AM2301" sensor. How can I communicate with node-red by connecting the sensor to the Pi.

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## [MQTT LWT design philosphy question](https://discourse.nodered.org/t/mqtt-lwt-design-philosphy-question/53352)

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**Author:** [@gerry](https://discourse.nodered.org/u/gerry)\
**Replies:** 8\
**Last updated:** [9 November 2021 14:20 UTC](https://discourse.nodered.org/t/mqtt-lwt-design-philosphy-question/53352 "2021-11-09T14:20:03Z")

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In polishing up some code I started using the MQTT LWT message to notify the flow of dropping connections. The code works and I think I understand the use of the LWT but...... in all examples I have looked at both on thi…

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## [Installing Node.JS on Windows](https://discourse.nodered.org/t/installing-node-js-on-windows/53450)

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**Author:** [@TotallyInformation](https://discourse.nodered.org/u/TotallyInformation)\
**Replies:** 4\
**Last updated:** [9 November 2021 13:56 UTC](https://discourse.nodered.org/t/installing-node-js-on-windows/53450 "2021-11-09T13:56:05Z")

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For those, like myself, who didn't know this. The official Windows installer for Node.JS now includes the required build tools. Therefore, npm install -g windows-build-tools should no longer be needed. I am about to te…

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## [All my nodes and flows gone](https://discourse.nodered.org/t/all-my-nodes-and-flows-gone/1256)

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**Author:** [@Andyk5](https://discourse.nodered.org/u/Andyk5)\
**Replies:** 27\
**Last updated:** [9 November 2021 13:55 UTC](https://discourse.nodered.org/t/all-my-nodes-and-flows-gone/1256 "2021-11-09T13:55:38Z")

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Hi all Has anyone one had a problem like this. Node red been runni g on my rpi3 for few months no problem. I had download about ten other nodes and i have two flows funning. For some reason i lost conection to node …

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## [Name resolution](https://discourse.nodered.org/t/name-resolution/53266)

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**Author:** [@pvanklink](https://discourse.nodered.org/u/pvanklink)\
**Replies:** 9\
**Last updated:** [9 November 2021 12:57 UTC](https://discourse.nodered.org/t/name-resolution/53266 "2021-11-09T12:57:13Z")

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Hi, I am busy with an action to remove all ip-adresses from my code and use hostnames that are registrated in /etc/hosts. This works for lot of code and nodes , but not always.. Now the problem. I have a function nod…

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## [Pizza-Kitchen monitoring (KDS) with NR?](https://discourse.nodered.org/t/pizza-kitchen-monitoring-kds-with-nr/53329)

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**Author:** [@PizzaProgram](https://discourse.nodered.org/u/PizzaProgram)\
**Replies:** 5\
**Last updated:** [9 November 2021 11:42 UTC](https://discourse.nodered.org/t/pizza-kitchen-monitoring-kds-with-nr/53329 "2021-11-09T11:42:57Z")

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\[offtopic\] I just wonder, if you guys think it would be possible to create a dynamic dashboard that would run a ticket-system on some tablets + Raspberry Pi with 1-2 big Touch-screens? It would need to handle: click o…

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## [Inject node - Use local time not UTC](https://discourse.nodered.org/t/inject-node-use-local-time-not-utc/11332)

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**Author:** [@martin\_a](https://discourse.nodered.org/u/martin_a)\
**Replies:** 21\
**Last updated:** [9 November 2021 11:18 UTC](https://discourse.nodered.org/t/inject-node-use-local-time-not-utc/11332 "2021-11-09T11:18:20Z")

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Hey! Is there any way to make the inject node use the local time and not UTC? While UTC might be fine for some applications, if I want to use timed triggers it's just wrong. Any way to change this behaviour? Best rega…

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## [Load Balancing / Scaling Node-Red AWS instance](https://discourse.nodered.org/t/load-balancing-scaling-node-red-aws-instance/53406)

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**Author:** [@mrSidX](https://discourse.nodered.org/u/mrSidX)\
**Replies:** 0\
**Last updated:** [8 November 2021 22:20 UTC](https://discourse.nodered.org/t/load-balancing-scaling-node-red-aws-instance/53406 "2021-11-08T22:20:46Z")

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Anyone familiar with load balancing and scaling of node-red (AWS) instances? I have a prototype platform I am developing with Node-Red, and I understand that the single (AWS T2.Small) instance I have it hosted on won't …

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## [The worst software ever created. I HATE YOU](https://discourse.nodered.org/t/the-worst-software-ever-created-i-hate-you/53389)

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**Author:** [@anon53275575](https://discourse.nodered.org/u/anon53275575)\
**Replies:** 13\
**Last updated:** [8 November 2021 22:08 UTC](https://discourse.nodered.org/t/the-worst-software-ever-created-i-hate-you/53389 "2021-11-08T22:08:51Z")

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Ive spent 1000s of hours setting up flows and all of a sudden I can only access the first page. I can see all my other flows but they are no longer clickable. If I disable my first flow the second one works but no other…

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## [Cron plus -1 hour](https://discourse.nodered.org/t/cron-plus-1-hour/53381)

<div class="topic-metadata">

**Author:** [@dowermyr](https://discourse.nodered.org/u/dowermyr)\
**Replies:** 7\
**Last updated:** [8 November 2021 21:45 UTC](https://discourse.nodered.org/t/cron-plus-1-hour/53381 "2021-11-08T21:45:27Z")

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Hi! Is there a way to make my cron plus activate an output minus 1 h ? This is how it is set up: \[{"id":"e4f20e150336f746","type":"tab","label":"Flow 1","disabled":false,"info":""},{"id":"872eb42d0fb54709","type":"cron…

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## [String to object conversion](https://discourse.nodered.org/t/string-to-object-conversion/53388)

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**Author:** [@MarcW84](https://discourse.nodered.org/u/MarcW84)\
**Replies:** 2\
**Last updated:** [8 November 2021 19:44 UTC](https://discourse.nodered.org/t/string-to-object-conversion/53388 "2021-11-08T19:44:47Z")

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Hi there, I am currently struggling with updating my Node Red intergration of Loxone and IKEA Tradfri Panel. I recently was able to get an array with brightness value and color temp out of my Loxone server but they now…

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## [MQTT-Node doesn't save any data in my file](https://discourse.nodered.org/t/mqtt-node-doesnt-save-any-data-in-my-file/53379)

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**Author:** [@crackl1ng](https://discourse.nodered.org/u/crackl1ng)\
**Replies:** 2\
**Last updated:** [8 November 2021 18:51 UTC](https://discourse.nodered.org/t/mqtt-node-doesnt-save-any-data-in-my-file/53379 "2021-11-08T18:51:43Z")

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Hi community, I'm a beginner in node-red and javascript in general and tried to display my LoRaWAN temperature sensor in a .txt file on my Raspberry Pi. I tried out creating data with a timestamp, which worked fine and …

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## [Push to git problem](https://discourse.nodered.org/t/push-to-git-problem/52526)

<div class="topic-metadata">

**Author:** [@RogierQ](https://discourse.nodered.org/u/RogierQ)\
**Replies:** 6\
**Last updated:** [8 November 2021 18:14 UTC](https://discourse.nodered.org/t/push-to-git-problem/52526 "2021-11-08T18:14:21Z")

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Trying to setup a push to git What i did enabled projects did project settings and credentials set git remote with https from hamburger menu settings\>Git config\>create ssh key copied ssh key to git page Deploy keys…

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## [Upgrading node.js and node-red for AWS EC2 ubuntu](https://discourse.nodered.org/t/upgrading-node-js-and-node-red-for-aws-ec2-ubuntu/53327)

<div class="topic-metadata">

**Author:** [@ThibautRuy](https://discourse.nodered.org/u/ThibautRuy)\
**Replies:** 2\
**Last updated:** [8 November 2021 14:30 UTC](https://discourse.nodered.org/t/upgrading-node-js-and-node-red-for-aws-ec2-ubuntu/53327 "2021-11-08T14:30:25Z")

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Is this the right command for Upgrading node.js and node-red for AWS EC2 ubuntu: bash \<(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodered) I can't find the explan…

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