# General

**URL:** https://discourse.nodered.org/c/general/7.md?page=714

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

**Page:** 715

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## [Implementation of Rule engine](https://discourse.nodered.org/t/implementation-of-rule-engine/30060)

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**Author:** [@akhtar321h](https://discourse.nodered.org/u/akhtar321h)\
**Replies:** 5\
**Last updated:** [15 July 2020 07:14 UTC](https://discourse.nodered.org/t/implementation-of-rule-engine/30060 "2020-07-15T07:14:13Z")

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Hello Everyone, I am new to the rule engine. I want to work on rule engine. Please suggest me. How I can use rule engine in node red. Just like I want to compare some threshold and generate alerts. How i can implement…

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## [Slow Browser Response after Upgrade](https://discourse.nodered.org/t/slow-browser-response-after-upgrade/30097)

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**Author:** [@Paulf007](https://discourse.nodered.org/u/Paulf007)\
**Replies:** 2\
**Last updated:** [15 July 2020 06:01 UTC](https://discourse.nodered.org/t/slow-browser-response-after-upgrade/30097 "2020-07-15T06:01:10Z")

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I upgraded to 1.0.5, I love the new features and well done to the team!! One thing that I have noticed is that my Chrome Browser will "hang" if I have moved to another tab and then back to node-red after a min or so. Th…

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## [Projects feature authentication problem](https://discourse.nodered.org/t/projects-feature-authentication-problem/22877)

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**Author:** [@echtelerp](https://discourse.nodered.org/u/echtelerp)\
**Replies:** 22\
**Last updated:** [15 July 2020 06:10 UTC](https://discourse.nodered.org/t/projects-feature-authentication-problem/22877 "2020-07-15T06:10:03Z")

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Hi there, I hava a problem with adding a remote to my projects. in particular with the login I did create a new key, added it to GitHub,.. and so on. is there a way to debug, why it is not logging me in?= greetings…

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## [OPC UA Communication slow](https://discourse.nodered.org/t/opc-ua-communication-slow/30096)

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**Author:** [@abedgarr](https://discourse.nodered.org/u/abedgarr)\
**Replies:** 0\
**Last updated:** [15 July 2020 04:00 UTC](https://discourse.nodered.org/t/opc-ua-communication-slow/30096 "2020-07-15T04:00:30Z")

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I have managed to connect via OPC UA on node-red, however I am testing with uaExpert OPC UA, and I see that communication is not very fast. This is normal? Sending data from UaExperte OPC UA to the server mounted on nod…

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## [Basic Question about Node-RED Editor](https://discourse.nodered.org/t/basic-question-about-node-red-editor/30027)

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**Author:** [@gbenham](https://discourse.nodered.org/u/gbenham)\
**Replies:** 2\
**Last updated:** [15 July 2020 01:46 UTC](https://discourse.nodered.org/t/basic-question-about-node-red-editor/30027 "2020-07-15T01:46:22Z")

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Hello. This is my first question and I'm sure it'll be very basic for any of you but it's pretty frustrating for me. I'm working out of the book "20 Easy Raspberry Pi Projects". I'm on Project 17 where they use Node-RED …

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## [Iterating through message's child array in SQL Query](https://discourse.nodered.org/t/iterating-through-messages-child-array-in-sql-query/30089)

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**Author:** [@bppuck](https://discourse.nodered.org/u/bppuck)\
**Replies:** 2\
**Last updated:** [15 July 2020 00:18 UTC](https://discourse.nodered.org/t/iterating-through-messages-child-array-in-sql-query/30089 "2020-07-15T00:18:00Z")

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Hi, I need help figuring out how to instantiate a SQL variable with an array value, or find another method to accomplish iterating through a child array within the message. The results from my attempt are producing emp…

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## [Why TTN ceases Node-Red support](https://discourse.nodered.org/t/why-ttn-ceases-node-red-support/30084)

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**Author:** [@EdK](https://discourse.nodered.org/u/EdK)\
**Replies:** 3\
**Last updated:** [14 July 2020 21:02 UTC](https://discourse.nodered.org/t/why-ttn-ceases-node-red-support/30084 "2020-07-14T21:02:43Z")

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I recently saw that The Things Network stopped all support for Node-Red. Also, Multitech has dropped Node-Red from their routers. Does anyone know why?

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## [Testing Message - eui - Must be true](https://discourse.nodered.org/t/testing-message-eui-must-be-true/30071)

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**Author:** [@ScheepersJohan](https://discourse.nodered.org/u/ScheepersJohan)\
**Replies:** 3\
**Last updated:** [14 July 2020 20:21 UTC](https://discourse.nodered.org/t/testing-message-eui-must-be-true/30071 "2020-07-14T20:21:34Z")

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I have a msg.payload = eui-xxxxxxxxxx I only want the pass on the message if it starts with eui. If the message does not start with eui it needs to be blocked. Were thinking along the line of function node with , butt…

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## [Visual Flow Creator](https://discourse.nodered.org/t/visual-flow-creator/29712)

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**Author:** [@dathor](https://discourse.nodered.org/u/dathor)\
**Replies:** 24\
**Last updated:** [14 July 2020 19:50 UTC](https://discourse.nodered.org/t/visual-flow-creator/29712 "2020-07-14T19:50:23Z")

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Interesting, I didn't know Siemens were using a derivative of node-red in there IoT offering. "MindSphere". I haven't used it but thought it worth posting here to see if anyone else has used it. I actually started using…

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## [Pythonshell play audio using Pygame](https://discourse.nodered.org/t/pythonshell-play-audio-using-pygame/30022)

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**Author:** [@Inso](https://discourse.nodered.org/u/Inso)\
**Replies:** 4\
**Last updated:** [14 July 2020 18:27 UTC](https://discourse.nodered.org/t/pythonshell-play-audio-using-pygame/30022 "2020-07-14T18:27:51Z")

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Hi, I have a simple Python script to play audio: #!/usr/bin/env python2 import sys import pygame print(sys.version) file = '/home/pi/Musik/02-black\_light\_burns-animal.mp3' pygame.init() pygame.mixer.init() pygame.mixer…

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## [Timestamp into the chart](https://discourse.nodered.org/t/timestamp-into-the-chart/29863)

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**Author:** [@Ref\_A](https://discourse.nodered.org/u/Ref_A)\
**Replies:** 18\
**Last updated:** [14 July 2020 17:20 UTC](https://discourse.nodered.org/t/timestamp-into-the-chart/29863 "2020-07-14T17:20:42Z")

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Hello, I am trying to figure out how to chart my DynamoDB values into the chart. Currently I am getting the data with timestamp from DynamoDB which I can view it in Node-red. Problem I get is getting the data into the c…

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## [Sending raw CEC codes? Best module to use?](https://discourse.nodered.org/t/sending-raw-cec-codes-best-module-to-use/30069)

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**Author:** [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\
**Replies:** 2\
**Last updated:** [14 July 2020 17:09 UTC](https://discourse.nodered.org/t/sending-raw-cec-codes-best-module-to-use/30069 "2020-07-14T17:09:51Z")

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Need to do more than just turn on and off a HDMI attached device. I am using node-red-contrib-cec, and got the basics working. on and off for example. But not sure how to send raw CEC codes? I tried setting the OpCode…

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## [Upgrade problem: Node-RED is not yet fully installed](https://discourse.nodered.org/t/upgrade-problem-node-red-is-not-yet-fully-installed/3216)

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**Author:** [@willemx](https://discourse.nodered.org/u/willemx)\
**Replies:** 73\
**Last updated:** [14 July 2020 16:34 UTC](https://discourse.nodered.org/t/upgrade-problem-node-red-is-not-yet-fully-installed/3216 "2020-07-14T16:34:55Z")

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I am trying to update NR on my RaspberryPi (OS version 9 stretch) to version 0.19. After executing the update script, NR will not start anymore, but says: Node-RED is not yet fully installed This Node-RED install doesn…

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## [Pull switch/router config with SSH flow](https://discourse.nodered.org/t/pull-switch-router-config-with-ssh-flow/29997)

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**Author:** [@Dane84](https://discourse.nodered.org/u/Dane84)\
**Replies:** 16\
**Last updated:** [14 July 2020 16:33 UTC](https://discourse.nodered.org/t/pull-switch-router-config-with-ssh-flow/29997 "2020-07-14T16:33:48Z")

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Hi, I'm trying to find a, in my opinion, very simple flow to do the following. Connect via SSH to an IP address Login with username/password Run the commands: no page show system\* show version\* show vlans\* show tr…

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## [Homekit-bridged use cellular network](https://discourse.nodered.org/t/homekit-bridged-use-cellular-network/28840)

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**Author:** [@sdalee](https://discourse.nodered.org/u/sdalee)\
**Replies:** 1\
**Last updated:** [14 July 2020 16:28 UTC](https://discourse.nodered.org/t/homekit-bridged-use-cellular-network/28840 "2020-07-14T16:28:07Z")

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Hello, Is there any way to access "node-red-contrib-homekit-bridged" node from internet? Certainly, it works well on my wifi network.

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## [Node-Red does not run as a service on a raspberry](https://discourse.nodered.org/t/node-red-does-not-run-as-a-service-on-a-raspberry/29901)

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**Author:** [@tdrees](https://discourse.nodered.org/u/tdrees)\
**Replies:** 9\
**Last updated:** [14 July 2020 15:35 UTC](https://discourse.nodered.org/t/node-red-does-not-run-as-a-service-on-a-raspberry/29901 "2020-07-14T15:35:26Z")

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Hi, I just upgraded my Node-Red on my Raspberry to the lastet version. When I try to start it using "./node-red" it starts without any problem. But when I try to start it as a service using "node-red-start" I am gettin…

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## [Modbus TCP array to readable value](https://discourse.nodered.org/t/modbus-tcp-array-to-readable-value/29851)

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**Author:** [@John\_Barry](https://discourse.nodered.org/u/John_Barry)\
**Replies:** 7\
**Last updated:** [14 July 2020 14:05 UTC](https://discourse.nodered.org/t/modbus-tcp-array-to-readable-value/29851 "2020-07-14T14:05:26Z")

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Hi, I've been through several sites and forums but i'm still struggling to read a frequency value from a power meter to node red. The debug node shows an array of two values but i don't know how to manipulate them into …

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## [No-red-auth-github](https://discourse.nodered.org/t/no-red-auth-github/29879)

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**Author:** [@newsky40](https://discourse.nodered.org/u/newsky40)\
**Replies:** 2\
**Last updated:** [14 July 2020 13:58 UTC](https://discourse.nodered.org/t/no-red-auth-github/29879 "2020-07-14T13:58:08Z")

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I'm try to follow https://github.com/node-red/node-red-auth-github. I don't know what should I enter for callback URL. When I make OAuth Apps, I have to enter callback URL, so I write http:// my-node-red-url(localhost)…

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## [Anyone know a way to do a dynamic (mqtt) specification subscriber topic specific?](https://discourse.nodered.org/t/anyone-know-a-way-to-do-a-dynamic-mqtt-specification-subscriber-topic-specific/29956)

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**Author:** [@Nodi.Rubrum](https://discourse.nodered.org/u/Nodi.Rubrum)\
**Replies:** 7\
**Last updated:** [14 July 2020 13:49 UTC](https://discourse.nodered.org/t/anyone-know-a-way-to-do-a-dynamic-mqtt-specification-subscriber-topic-specific/29956 "2020-07-14T13:49:14Z")

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Anyone know a way to do a dynamic (mqtt) specification subscriber topic specific? This not using # or + if the subscriber, at least I don't think so, I will xplain. I want the subscriber to be specific, thus the flow t…

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## [Auto mouse cursor move and click node?](https://discourse.nodered.org/t/auto-mouse-cursor-move-and-click-node/30043)

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**Author:** [@Jude.Robise](https://discourse.nodered.org/u/Jude.Robise)\
**Replies:** 2\
**Last updated:** [14 July 2020 13:46 UTC](https://discourse.nodered.org/t/auto-mouse-cursor-move-and-click-node/30043 "2020-07-14T13:46:02Z")

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Hey guys, Is there any node that can move mouse cursor by giving coordinates x and y ? :smiley: I googled but did not get any possible nodes yet. Thanks -Jude

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## [Sudo npm install node-red-contrib-oled - Errors](https://discourse.nodered.org/t/sudo-npm-install-node-red-contrib-oled-errors/29972)

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**Author:** [@jfk](https://discourse.nodered.org/u/jfk)\
**Replies:** 20\
**Last updated:** [14 July 2020 12:31 UTC](https://discourse.nodered.org/t/sudo-npm-install-node-red-contrib-oled-errors/29972 "2020-07-14T12:31:09Z")

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Hi Folks Starting out with Node Red on raspberry pi 4. Have been using sbc's and micro controllers for may years. have setup NR as per the instructions on nodered docs getting-started raspberrypi Looking to build up a …

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## [Flashing ESP32 wifi devices over the air(OTA) using node-red?](https://discourse.nodered.org/t/flashing-esp32-wifi-devices-over-the-air-ota-using-node-red/29978)

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**Author:** [@zazas321](https://discourse.nodered.org/u/zazas321)\
**Replies:** 11\
**Last updated:** [14 July 2020 12:10 UTC](https://discourse.nodered.org/t/flashing-esp32-wifi-devices-over-the-air-ota-using-node-red/29978 "2020-07-14T12:10:13Z")

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Hello. I am working on a project where I have a single raspberry PI configured as mqtt broker and I need to monitor/control up to 50 or more remote esp32 devices in a close proximity that will be taking various sensor re…

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## [Problem with Zigbee2mqtt out node](https://discourse.nodered.org/t/problem-with-zigbee2mqtt-out-node/30019)

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**Author:** [@sapster77](https://discourse.nodered.org/u/sapster77)\
**Replies:** 2\
**Last updated:** [14 July 2020 10:17 UTC](https://discourse.nodered.org/t/problem-with-zigbee2mqtt-out-node/30019 "2020-07-14T10:17:42Z")

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Hi, Hoping someone can assist me with an issue using zigbee2mqtt out node (node-red-contrib-zigbee2mqtt) and an Aqara wireless dual relay. I am receiving correct states from the relay: Jul 13 20:55:08 lysekil npm\[1286…

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## [Function node topic and payload fail to activate MQTT device](https://discourse.nodered.org/t/function-node-topic-and-payload-fail-to-activate-mqtt-device/29998)

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**Author:** [@pcborges](https://discourse.nodered.org/u/pcborges)\
**Replies:** 9\
**Last updated:** [14 July 2020 10:14 UTC](https://discourse.nodered.org/t/function-node-topic-and-payload-fail-to-activate-mqtt-device/29998 "2020-07-14T10:14:59Z")

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Hi, I am trying to activate a relay when temperature from OpenWeatherMap reaches a certain value. Using an inject node the relay is successfully activated but when when topic and payload are sent from functions it does …

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## [Translate tweet languages into English using Language Translator and Language Identify node](https://discourse.nodered.org/t/translate-tweet-languages-into-english-using-language-translator-and-language-identify-node/30006)

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**Author:** [@jahnavi\_30](https://discourse.nodered.org/u/jahnavi_30)\
**Replies:** 1\
**Last updated:** [14 July 2020 09:15 UTC](https://discourse.nodered.org/t/translate-tweet-languages-into-english-using-language-translator-and-language-identify-node/30006 "2020-07-14T09:15:22Z")

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Since the NLU node does not accept all languages, have to translate the incoming tweets languages into English using Language Translator and Language Identify. Kindly help.

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## [MQTT node with disconnection - Node-RED](https://discourse.nodered.org/t/mqtt-node-with-disconnection-node-red/29975)

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**Author:** [@develop5632](https://discourse.nodered.org/u/develop5632)\
**Replies:** 5\
**Last updated:** [14 July 2020 07:39 UTC](https://discourse.nodered.org/t/mqtt-node-with-disconnection-node-red/29975 "2020-07-14T07:39:14Z")

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Hi, I'm using the MQTT node to send data to a cloud server, the Node-Red server is installed in a Physical Device which is collecting data from a PLC. In the MQTT out node configuration I'm using QoS 1 and I noticed that…

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## [Want to make a min/max text box on the dashboard for temp sensor output](https://discourse.nodered.org/t/want-to-make-a-min-max-text-box-on-the-dashboard-for-temp-sensor-output/30033)

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**Author:** [@rmystique](https://discourse.nodered.org/u/rmystique)\
**Replies:** 1\
**Last updated:** [14 July 2020 07:29 UTC](https://discourse.nodered.org/t/want-to-make-a-min-max-text-box-on-the-dashboard-for-temp-sensor-output/30033 "2020-07-14T07:29:57Z")

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I have text box but could have 2 if needed, i have atemp sensor giving me temp readings and i want to use that to check if its above or below the previous min/max and is so update the text box to show the new min or max…

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## [Stop flow after a message](https://discourse.nodered.org/t/stop-flow-after-a-message/29264)

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**Author:** [@Vlak](https://discourse.nodered.org/u/Vlak)\
**Replies:** 11\
**Last updated:** [14 July 2020 06:05 UTC](https://discourse.nodered.org/t/stop-flow-after-a-message/29264 "2020-07-14T06:05:24Z")

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Dear people, i am looking for a way to stop a flow. I use an inject node that gives an inject every 10 minutes to see if the lux meter outside is within a certain value. If he does that, a lamp is switched on. but now …

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## [VLC nodes. Searching I get one thing and in the library I can't find any nodes](https://discourse.nodered.org/t/vlc-nodes-searching-i-get-one-thing-and-in-the-library-i-cant-find-any-nodes/16019)

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**Author:** [@Trying\_to\_learn](https://discourse.nodered.org/u/Trying_to_learn)\
**Replies:** 15\
**Last updated:** [14 July 2020 04:55 UTC](https://discourse.nodered.org/t/vlc-nodes-searching-i-get-one-thing-and-in-the-library-i-cant-find-any-nodes/16019 "2020-07-14T04:55:39Z")

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Latest project: VLC on a remote RPI playing Music via VLC. Well, I picked VLC as it is a pretty good generic player. Searching g\*\*gle there are many lists and I can even to go the sites which list/describe the nodes. …

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## [Uibuilder - directory to serve resources](https://discourse.nodered.org/t/uibuilder-directory-to-serve-resources/30018)

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**Author:** [@Andrei](https://discourse.nodered.org/u/Andrei)\
**Replies:** 3\
**Last updated:** [14 July 2020 01:29 UTC](https://discourse.nodered.org/t/uibuilder-directory-to-serve-resources/30018 "2020-07-14T01:29:08Z")

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I decided learning how to use uibuilder (it was about time...). In my first flow I want to create a web page with a single image, using only html/css/javascript. I will not try any front-end at this stage as this is pure…

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