# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=609

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

**Page:** 610

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## [Error: node not deploy](https://discourse.nodered.org/t/error-node-not-deploy/40382)

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**Author:** [@pietrofduarte](https://discourse.nodered.org/u/pietrofduarte)\
**Replies:** 0\
**Last updated:** [4 February 2021 14:59 UTC](https://discourse.nodered.org/t/error-node-not-deploy/40382 "2021-02-04T14:59:43Z")

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Hello guys any body use Node-Red with docker ? Let me explain the aplication: I use docker compose and set the network, ip (fixed) and volume (outside) using the docker-compose. After run docker compose, I run to insid…

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## [How to Plot line chart of real time data](https://discourse.nodered.org/t/how-to-plot-line-chart-of-real-time-data/40167)

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**Author:** [@kajal](https://discourse.nodered.org/u/kajal)\
**Replies:** 20\
**Last updated:** [4 February 2021 13:59 UTC](https://discourse.nodered.org/t/how-to-plot-line-chart-of-real-time-data/40167 "2021-02-04T13:59:57Z")

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I am new to node red and i am trying to plot line chart of real time data, but nothing is display on chart My flow. \[{"id":"5c0f3e4b.7b304","type":"tab","label":"Vibration\_Dashboard","disabled":false,"info":""},{"id":"…

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## [Regex help or idéas](https://discourse.nodered.org/t/regex-help-or-ideas/40337)

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**Author:** [@niclas.w82](https://discourse.nodered.org/u/niclas.w82)\
**Replies:** 9\
**Last updated:** [4 February 2021 12:32 UTC](https://discourse.nodered.org/t/regex-help-or-ideas/40337 "2021-02-04T12:32:57Z")

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Hi! I have tried to find a smart solution to filter out some values. Im intressed In controller.door.motorlock.locked the only thing that changes is locked so can I use controller.door.motorlock as a condition? The seco…

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## [Count 10 minutes rainfall over 24 hours (aggregation node)](https://discourse.nodered.org/t/count-10-minutes-rainfall-over-24-hours-aggregation-node/40317)

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**Author:** [@HaVi](https://discourse.nodered.org/u/HaVi)\
**Replies:** 8\
**Last updated:** [4 February 2021 12:02 UTC](https://discourse.nodered.org/t/count-10-minutes-rainfall-over-24-hours-aggregation-node/40317 "2021-02-04T12:02:31Z")

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My rain sensor measures rainfall in a 10 minute interval. The number of millimeters is sent every 10 minutes via LoRaWan (TTN) to NodeRED in the format payload.neerslag (like 0.55 mm). I want to display what the precipi…

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## [Problems with SPLIT node and strings](https://discourse.nodered.org/t/problems-with-split-node-and-strings/40373)

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**Author:** [@projecttwo](https://discourse.nodered.org/u/projecttwo)\
**Replies:** 1\
**Last updated:** [4 February 2021 11:35 UTC](https://discourse.nodered.org/t/problems-with-split-node-and-strings/40373 "2021-02-04T11:35:10Z")

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Hey all, we want to cut a string with the "SPLIT" node... thats works very well but we got in every case two messages... one with the correct (splitted) string, but another with empty text... the original string is "1…

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## [Memory leak, none of the existing answers help](https://discourse.nodered.org/t/memory-leak-none-of-the-existing-answers-help/40361)

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**Author:** [@prerna](https://discourse.nodered.org/u/prerna)\
**Replies:** 12\
**Last updated:** [4 February 2021 11:21 UTC](https://discourse.nodered.org/t/memory-leak-none-of-the-existing-answers-help/40361 "2021-02-04T11:21:41Z")

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I have been using node-red for a basic flow-builder use-case. For that purpose, I have hidden all the nodes I don't need and created 4 extra nodes. It had been working well for the past 3 weeks until this week whenever I…

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## [Node pm2 Autoboot Node palette missing unable to reinstall](https://discourse.nodered.org/t/node-pm2-autoboot-node-palette-missing-unable-to-reinstall/40218)

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**Author:** [@PainWorry](https://discourse.nodered.org/u/PainWorry)\
**Replies:** 5\
**Last updated:** [4 February 2021 10:05 UTC](https://discourse.nodered.org/t/node-pm2-autoboot-node-palette-missing-unable-to-reinstall/40218 "2021-02-04T10:05:00Z")

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My friend have just install pm2 to make node-red automaticaly start when it boot up https://nodered.org/docs/faq/starting-node-red-on-boot#2-determine-the-exact-location-of-the-node-red-command but then he've found…

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## [Rpi-keyboard node - observations](https://discourse.nodered.org/t/rpi-keyboard-node-observations/40358)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 3\
**Last updated:** [4 February 2021 09:12 UTC](https://discourse.nodered.org/t/rpi-keyboard-node-observations/40358 "2021-02-04T09:12:44Z")

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A while back I was asking how to detect key presses on a keyboard and was pointed to the node-red-node-pi-gpio set of nodes with a keyboard node. Ok, done. (This is a side-project and so wasn't receiving correct priori…

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## [How to pass context data into subflow using the](https://discourse.nodered.org/t/how-to-pass-context-data-into-subflow-using-the/40316)

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**Author:** [@sokkensoepje](https://discourse.nodered.org/u/sokkensoepje)\
**Replies:** 7\
**Last updated:** [4 February 2021 09:11 UTC](https://discourse.nodered.org/t/how-to-pass-context-data-into-subflow-using-the/40316 "2021-02-04T09:11:59Z")

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I've created a function to call some api's and return some data. All the function need is some input (in the message) and an API-key. The API-key is stored in the context data and is accessible in function nodes usinig c…

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## [Cannot ping out - Node Red on Windows 10](https://discourse.nodered.org/t/cannot-ping-out-node-red-on-windows-10/40340)

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**Author:** [@TexasNetworkEngineer](https://discourse.nodered.org/u/TexasNetworkEngineer)\
**Replies:** 5\
**Last updated:** [4 February 2021 07:34 UTC](https://discourse.nodered.org/t/cannot-ping-out-node-red-on-windows-10/40340 "2021-02-04T07:34:23Z")

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Hello Everyone, I have used node-red as a network engineer who works in automation. While I have used node-red on vendor hardware where it was pre-installed. I have not used in on windows 10. I am planning to install on…

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## [Websocket Send, receive and flow back to send](https://discourse.nodered.org/t/websocket-send-receive-and-flow-back-to-send/40353)

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**Author:** [@gene-code](https://discourse.nodered.org/u/gene-code)\
**Replies:** 0\
**Last updated:** [4 February 2021 04:34 UTC](https://discourse.nodered.org/t/websocket-send-receive-and-flow-back-to-send/40353 "2021-02-04T04:34:45Z")

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Hi, So my flow has 2 websocket nodes. A is sending and B is receiving. I am communicating continuously, I am able to send data to the A node, and when the server replies, I am able to get the data at B node. But, fro…

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## [How to send multi-part command to Tasmota?](https://discourse.nodered.org/t/how-to-send-multi-part-command-to-tasmota/40278)

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**Author:** [@apricotfarm](https://discourse.nodered.org/u/apricotfarm)\
**Replies:** 2\
**Last updated:** [4 February 2021 01:01 UTC](https://discourse.nodered.org/t/how-to-send-multi-part-command-to-tasmota/40278 "2021-02-04T01:01:21Z")

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Can I send a multi-part command to a Tasmota device using MQTT? I want to set the TimeDST setting; typing directly into the Tasmota console, the command looks something like this: TimeDST 0,2,3,1,2,-240 ...easy enough,…

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## [Communication between Express App and nodered](https://discourse.nodered.org/t/communication-between-express-app-and-nodered/40308)

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**Author:** [@freakent](https://discourse.nodered.org/u/freakent)\
**Replies:** 1\
**Last updated:** [4 February 2021 00:28 UTC](https://discourse.nodered.org/t/communication-between-express-app-and-nodered/40308 "2021-02-04T00:28:50Z")

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Hi noderedders, I have embedded nodered in an express application, as per the instructions here: https://nodered.org/docs/user-guide/runtime/embedding. My express application is part of an existing SDK implementation. …

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## [Using Node 15.7 or 15.8 with NR?](https://discourse.nodered.org/t/using-node-15-7-or-15-8-with-nr/40315)

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**Author:** [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\
**Replies:** 3\
**Last updated:** [3 February 2021 22:42 UTC](https://discourse.nodered.org/t/using-node-15-7-or-15-8-with-nr/40315 "2021-02-03T22:42:54Z")

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Using Node 15.7 or 15.8 with NR? Anyone done this as yet?

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## [Node red stopped on IBM cloud](https://discourse.nodered.org/t/node-red-stopped-on-ibm-cloud/37437)

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**Author:** [@mako](https://discourse.nodered.org/u/mako)\
**Replies:** 9\
**Last updated:** [3 February 2021 21:30 UTC](https://discourse.nodered.org/t/node-red-stopped-on-ibm-cloud/37437 "2021-02-03T21:30:44Z")

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Hi. I have some HTTP nodes setup on bluemix nodeRED to forward some basic messages to a MQTT broker. Today i noticed that the messages had stopped on December the 10th. i went to my bluemix account and node red was sto…

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## [Turn on ceiling fan](https://discourse.nodered.org/t/turn-on-ceiling-fan/39403)

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**Author:** [@peejayw](https://discourse.nodered.org/u/peejayw)\
**Replies:** 3\
**Last updated:** [3 February 2021 21:21 UTC](https://discourse.nodered.org/t/turn-on-ceiling-fan/39403 "2021-02-03T21:21:22Z")

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I have a temperature sensor ar floor height and one at ceiling height. I want to use the difference in temperature to turn on a ceiling fan rather than an absolute temperature ie fan turns on when ceiling temp is 5° abov…

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## [SteelSeries Windows Load](https://discourse.nodered.org/t/steelseries-windows-load/40335)

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**Author:** [@KPD](https://discourse.nodered.org/u/KPD)\
**Replies:** 0\
**Last updated:** [3 February 2021 20:36 UTC](https://discourse.nodered.org/t/steelseries-windows-load/40335 "2021-02-03T20:36:45Z")

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I am (brand new at this and) adding node-red to my laptop for my boat dashboard implementation, but for some reason I can't seem to set up the SeelSeries in Win10 so that it's accessible. Not hard on the Pi, but I'm doi…

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## [Saving and accessing bi-dimensional variables](https://discourse.nodered.org/t/saving-and-accessing-bi-dimensional-variables/40304)

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**Author:** [@fmarzocca](https://discourse.nodered.org/u/fmarzocca)\
**Replies:** 6\
**Last updated:** [3 February 2021 16:01 UTC](https://discourse.nodered.org/t/saving-and-accessing-bi-dimensional-variables/40304 "2021-02-03T16:01:08Z")

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Hi, my flows should make use of several variables with this format: var1 = "0615", "value1" var2 = "875", "value2" var3 = "745", "value3" ... I am trying to set/get the variables, but I got lost.... Thanks for any…

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## [Writing Node Parameters Dynamically](https://discourse.nodered.org/t/writing-node-parameters-dynamically/40301)

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**Author:** [@cverster](https://discourse.nodered.org/u/cverster)\
**Replies:** 5\
**Last updated:** [3 February 2021 15:47 UTC](https://discourse.nodered.org/t/writing-node-parameters-dynamically/40301 "2021-02-03T15:47:00Z")

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Hi all. I'm trying to write multiple values to influx DB through a single node. What confuses me about the node-red-contrib-influxdb batch node is that I'm not sure where to specify the database I want to write to, so I'…

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## [How to use MAX7219 8x8 LED matrix display](https://discourse.nodered.org/t/how-to-use-max7219-8x8-led-matrix-display/2967)

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**Author:** [@mshaz](https://discourse.nodered.org/u/mshaz)\
**Replies:** 16\
**Last updated:** [3 February 2021 15:45 UTC](https://discourse.nodered.org/t/how-to-use-max7219-8x8-led-matrix-display/2967 "2021-02-03T15:45:44Z")

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Hi i can't find any examples how to use the 8x8 LED matrix display in node-red . I need help

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## [Mqtt to Modbus Incorrect Value](https://discourse.nodered.org/t/mqtt-to-modbus-incorrect-value/40232)

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**Author:** [@vaughan.mcd](https://discourse.nodered.org/u/vaughan.mcd)\
**Replies:** 10\
**Last updated:** [3 February 2021 13:28 UTC](https://discourse.nodered.org/t/mqtt-to-modbus-incorrect-value/40232 "2021-02-03T13:28:51Z")

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I am having trouble with mqtt to modbus. Off AirCon/SetOnOff=0 On AirCon/SetOnOff=1 Off modbus {"address":0,"state":true} On modbus {"address":0,"state":true} as you can see no matter if mqtt receives a message 0 …

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## [Start the dropdown values on button click](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423)

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**Author:** [@sanket](https://discourse.nodered.org/u/sanket)\
**Replies:** 36\
**Last updated:** [3 February 2021 10:49 UTC](https://discourse.nodered.org/t/start-the-dropdown-values-on-button-click/39423 "2021-02-03T10:49:10Z")

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I have two dropdowns on dashboard but when I select dropdown values it gets automatically starts. I want to start dropdown values on button click. How to achieve this functionality.

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## [Suggestions from a Redmatic user](https://discourse.nodered.org/t/suggestions-from-a-redmatic-user/40297)

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**Author:** [@hlwerschner](https://discourse.nodered.org/u/hlwerschner)\
**Replies:** 1\
**Last updated:** [3 February 2021 10:54 UTC](https://discourse.nodered.org/t/suggestions-from-a-redmatic-user/40297 "2021-02-03T10:54:28Z")

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Hi, I am new to Node-Red - using it from Redmatic inside - and could not find a specific "suggestions" category, so I am inserting my ideas here: when creating a flow in my working window (I use a Win 10 PC with 4K m…

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## [Node Red Deploy button not working](https://discourse.nodered.org/t/node-red-deploy-button-not-working/40280)

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**Author:** [@tonyyanniello](https://discourse.nodered.org/u/tonyyanniello)\
**Replies:** 5\
**Last updated:** [3 February 2021 10:16 UTC](https://discourse.nodered.org/t/node-red-deploy-button-not-working/40280 "2021-02-03T10:16:03Z")

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Hi all. I seem to have broken my deploy button within Node-Red and I believe the issue has to do with a ton of unused labels under the Configuration tab. One post recommended deleting all of these and trying to deploy,…

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## [How can display resistor value greater than 390 ohms?](https://discourse.nodered.org/t/how-can-display-resistor-value-greater-than-390-ohms/40225)

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**Author:** [@betyty](https://discourse.nodered.org/u/betyty)\
**Replies:** 3\
**Last updated:** [3 February 2021 10:08 UTC](https://discourse.nodered.org/t/how-can-display-resistor-value-greater-than-390-ohms/40225 "2021-02-03T10:08:21Z")

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hi, i am using rtd-rpi board, and the maximum resistance actually measures 390 ohms. so when measuring resistances above 390 ohms the results are all around 410 ohms. (for example: I measured the resistance of the Heat…

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## [Super Noob Question Concerning Referencing msg.payload in the next node](https://discourse.nodered.org/t/super-noob-question-concerning-referencing-msg-payload-in-the-next-node/40266)

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**Author:** [@westek](https://discourse.nodered.org/u/westek)\
**Replies:** 7\
**Last updated:** [3 February 2021 09:52 UTC](https://discourse.nodered.org/t/super-noob-question-concerning-referencing-msg-payload-in-the-next-node/40266 "2021-02-03T09:52:31Z")

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Its a simple question, I'm sure. I have a text input box that is connected to a change node to add more text to the already existing text in msg.payload. For instance the text box passes "This is a test" I want to then a…

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## [HTML connect to dropdown node](https://discourse.nodered.org/t/html-connect-to-dropdown-node/40284)

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**Author:** [@Jamil100](https://discourse.nodered.org/u/Jamil100)\
**Replies:** 2\
**Last updated:** [3 February 2021 08:26 UTC](https://discourse.nodered.org/t/html-connect-to-dropdown-node/40284 "2021-02-03T08:26:52Z")

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Hello everyone, I have created a template that when you press an item in the dropdown list, it makes the word "Machine" be bold. Something like this below. But I would also like to have the feature that when I press the…

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## [Function of http in](https://discourse.nodered.org/t/function-of-http-in/40289)

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**Author:** [@NURULSYIFA98](https://discourse.nodered.org/u/NURULSYIFA98)\
**Replies:** 1\
**Last updated:** [3 February 2021 08:06 UTC](https://discourse.nodered.org/t/function-of-http-in/40289 "2021-02-03T08:06:35Z")

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Hello guys, I want to ask something about HTTP in the node-red. It is I need to use any link or not? I am working for voice recognition translator. But, when I already input the speech in telegram it will give differen…

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## [Send HTML form action from Node Red](https://discourse.nodered.org/t/send-html-form-action-from-node-red/40267)

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**Author:** [@ChrisDeVilliers](https://discourse.nodered.org/u/ChrisDeVilliers)\
**Replies:** 2\
**Last updated:** [3 February 2021 04:12 UTC](https://discourse.nodered.org/t/send-html-form-action-from-node-red/40267 "2021-02-03T04:12:59Z")

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Good day everyone, I have a networked projector that I am trying to connect to my home automation (Dell 7609WU). It has a simple web interface that uses an HTML form post to turn on and off the projector. While inspect…

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## [Deploy button not working](https://discourse.nodered.org/t/deploy-button-not-working/2972)

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**Author:** [@aihysp](https://discourse.nodered.org/u/aihysp)\
**Replies:** 38\
**Last updated:** [15 February 2019 15:29 UTC](https://discourse.nodered.org/t/deploy-button-not-working/2972 "2019-02-15T15:29:27Z")

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i have tried it all deleting all the subflows , all the config flows and all the flows and left with nothing still cannot deploy and yes i have seen this! https://groups.google.com/forum/#!topic/node-red/-PYF08I\_nRQ p…

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